Showing 51 items matching brass measuring instrument
-
Flagstaff Hill Maritime Museum and Village
Instrument - Hydrometer, 1878 to 1930s
... brass measuring instrument... brass measuring instrument K M Lynch Giffen Russell Harry Lynch ...This Sikes brass hydrometer was manufactured by the optical and scientific instrument makers Kasner & Moss of 17 Collins Street West, Melbourne, in the latter part of the nineteenth century. The firm adverted hydrometers, as well as optical instruments, as early as August 13th, 1864, in The Age, Melbourne. This hydrometer set was donated to Flagstaff Hill in 1979 by local wine and spirits merchants Lynch Bros of Fairy Street, Warrnambool. Giffen Russell had established the business in 1878, and Harry Lynch took it over in the 1930s, and after he passed away in 1953 Kevin Matthew Lynch became proprietor of K M Lynch Food and Liquor. The business closed in the 2010s. The hydrometer may date back to the establishment of the business in 1878, as Kasner & Moss were selling hydrometers in Melbourne from 1864. Hydrometers were used to measure the density, or relative density, of liquids from the late 1600s. In 1816 Bartholomew Sikes won the competition for the most useful accurate hydrometer. Hydrometers were commonly used by distillers, vintners, and brewers to establish accurate measures of alcohol concentration in their beverages. Following this manufacturing process, government inspectors and excise officers used them to check that the labelled indications of alcohol-proof were correct and that the right amounts of duty were being paid. This hydrometer and its fitted and hinged wooden container show signs of heavy and protracted use in a working environment. Although the instrument has some parts missing and has been recently repaired, the original quality of the inlaid box and the fine engraving on the instrument and the attachable weights, are indications of the hydrometer’s very real value when new. This Sikes hydrometer, bearing the maker's mark of “Kasner & Moss Melbourne” and the registered number “20373”, was presented to the purchasing public as a precision-made instrument designed for professional use. The Sikes hydrometer is of local significance because of its implied association with the alcohol trade in the southwest region of Victoria. It was donated by a family member of Lynch Bros, a local licensed outlet for wines and spirits in the period before the general relaxation of liquor licensing laws in the State of Victoria. It may have belonged to Griffin Russell who established the liquor store in 1878.Hydrometer; original Sikes brass hydrometer in a polished wooden case with an inlaid plaque on the lid. The brass float is a sphere with a thin flat upper stem and a short, lower stem with a bulb-shaped end. The upper stem is engraved scale on both sides with the numbers 1 to 10, and five divisions between each number. There are ten fixed pegs in the base to secure the thick brass horseshoe-shaped, numbered, various-sized weights (20, 30, 40, 80, 90); the free pegs would have originally stored another five weights (10, 50, 60, 70, and 100). The empty compartment in the box suggests another part in the initial set, probably a thermometer. The fitted, fabric-lined box has two brass closures and two brass hinges. The scientific instrument shows signs of heavy use and repairs. The Serial Number on the float matches the Serial Numbers on the weights. The plaque on the lid, the float and the weights have inscriptions. Made by Kasner & Moss, Melbourne. Plaque: “SIKES HYDROMETER / KASNER & MOSS / MELBOURNE” On float's lower stem: “SIKES 20373” On one thin edge of the float's scale, engraved in script “Kasner & Moss” and stamped “MELBOURNE”, and symbol“P” rotated 90 degrees. On the opposite thin edge of the float: “N20.373”, “SIKES”, “I P % II O” (in ornate capitals). Each weight has s unique number, and the same serial number “20373”.flagstaff hill, flagstaff hill maritime museum and village, warrnambool, maritime museum, maritime village, great ocean road, shipwreck coast, sikes hydrometer, scientific instrument, pressure measurement, measuring instrument, ullage tool, customs, excise duty, tax, alcohol content, proof, calibrate, standard weights and measures, tariff, kasner & moss, scientific instrument makers, specific gravity, liquid density, alcohol testing, technology, alcohol measurement, proof spirit, wine and spirits merchants, local business, brass measuring instrument, k m lynch, giffen russell, harry lynch -
Flagstaff Hill Maritime Museum and Village
Instrument - Hydrometer, J Long (Joseph Long), late 19th - early 20th century
... brass measuring instrument... business brass measuring instrument Port Fairy Customs Office Port ...This Sike’s Hydrometer was donated by the Port Fairy Customs Office as it was no longer required by them due to a change in the law. The hydrometer was part of a system for Ullaging or calculating the amount of liquid remaining in a container of liquor such as a barrel, and the amount of alcoholic content in the contents. It can also measure the free space or head space remaining. Hydrometers were used to measure the density, or relative density, of liquids from the late 1600s. In 1816 Bartholomew Sikes won the competition for the most useful accurate hydrometer. Hydrometers were commonly used by distillers, vintners, and brewers to establish accurate measures of alcohol concentration in their beverages. Following this manufacturing process, government inspectors and excise officers used them to check that the labelled indications of alcohol-proof were correct and that the right amounts of duty were being paid.The Sikes hydrometer is of local significance because of its association with the Government's Customs Office in Port Fairy, in the southwest region of Victoria. It is also associated with Bartholomew Sikes, whose design of a hydrometer was chosen in 1816 as being the most useful and accurate hydrometer. The hydrometer has evolved into the digital version available today to measure density of liquids.Sikes Hydrometer and thermometer in a fitted wooden case with crimson lining inside the lid and dark lining in the base. The case has ten vertical pegs to secure the weights. The brass hydrometer has a spherical float and eight thick brass horseshoe-shaped weights. The serial number is on each section of the float and all weights. Both sides of the float’s upper flat stem have a scale from 0-10, with five divisions between each number. The eight weights are numbered from 20 – 90 in increments of 10. The set includes a mercury thermometer mounted on an ivory back plate labelled with Fahrenheit and Centigrade Scales. The Sikes hydrometer set was made by Loftus of London. The hydrometer model is IID 510, Serial Number is 14674, calibrated by Longs, London. All parts of the float and eight weights are inscribed with Serial Number “14674” The float stem is stamped "SIKE'S IID 51o” Calibrator, "LONG LITTLE TOWER ST LONDON" The weights are numbered individually ”20”, “30”, “40”, “50”, “60”, “70”, “80” or “90” Each weight in inscribed; symbol “(J L) [inside an ova, with textured background]” The thermometer inscribed: “LOFTUS OF LONDON”flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, measuring instruments, customs tax, weighing instrument, sike’s hydrometer, calibrator long of london, loftus of london instrument maker, loftus, j long, sikes hydrometer, scientific instrument, pressure measurement, measuring instrument, ullage tool, customs, excise duty, tax, alcohol content, proof, calibrate, standard weights and measures, tariff, scientific instrument makers, specific gravity, liquid density, alcohol testing, technology, alcohol measurement, proof spirit, wine and spirits merchants, local business, brass measuring instrument, port fairy, customs office, port fairy customs, joseph long, instrument maker -
The Ed Muirhead Physics Museum
Planimeter with case and key
... Planimeter consisting of brass disc and measuring... with case and key Planimeter consisting of brass disc and measuring ...Planimeter consisting of brass disc and measuring instrument made of white disc and attached bar. To measure area up to about the size of one A4 page. The instrument is stored in a black hinged box with purple velvet lining and small metal catches. Instruments instructions are attached to a label on the inside of the case. A small key is attached to the case lid by string. (23.1 = box, 23.2 = brass disc, 23.3 = planimeter)On planimeter (23.3): “G.Coradi Zurich Switzerland No. 3509” On box (23.1): “Nat. Phil. Lab. No. 1199, Gebr Wichmann Berlin” -
Federation University Historical Collection
Instrument - Weights and measures, Collection of Nested Cup Troy Weights, (23093.3) 1826
The nested cup weights were designed to make the transport of weights, essential items in most commercial transactions, more convenient. This idea goes back to Roman times. In the nested cup form, a series of weights shaped into cups are set one into the other. Each cup fits precisely into the next, larger sized cup which each larger example weighing exactly twice that of the one previous. The Troy weight system was used for precious metals and gemstones.7 x Brass troy measures of various sizes. Fine groove lines near top edge and bottom 2 x Copper sliding weights - domed.1) 32 oz Troy around top .2) 16 oz Troy around top .3) VIII R around top. Maker's mark - lidded pot (coffee/tea?) with date 1826 .4) 8 oz around top .5) 6 oz Troy around top .6) 4 oz Troy .7) 2 oz Troy "WATERS" on top of sliders with "4" on under sidenested cups weights, troy weight, precious metals, gemstones, commercial transactions, sliding weights, domed weights -
Federation University Historical Collection
Electrical Instrument, Potential Terminals: No L - 201136
Cambridge Instrument Co Ltd, England operated from 1924 to 1967. They were makers of measuring instruments (electrical) and scientific instruments.Timber framed electrical instrument with interior metal conductor. Brass knobs that screw are at one end labelled 1.5 volts and 15 amps. Plates each end labelledscientific instrument, cambridge instruments, electricity, scientific objects, scientific instruments -
Federation University Historical Collection
Scientific Instrument, The Cambridge and Paul Instrument Co. Ltd, Galvonometer
A type of instrument used in the 1900s to measure very low currents by sending beams of light to the mirror and reflecting this back onto a wall using the mirror as an amplifier. Small currents in V/A can display a displacement of a few inches on the wall. This instrument has to be balanced, hence the air bubble level and adjustable feet. The meter was scaled in degrees. Galvonometer with all brass body shell removable for initital adjustments. Two observation ports. Base with levelling feet.scientific instrument, galvonometer -
Federation University Historical Collection
Scientific Instrument, Spherometer
A spherometer is an instrument for the precise measurement of the radius of curvature of a sphere or a curved surface. Originally, these instruments were primarily used by opticians to measure the curvature of the surface of a lens. A fixed-frame tripod with adjustable central contact screw, equipped with micrometer scale. Brass construction with steel contact points. Designed for measuring curvature of lenses. Stored in a polished timber box. Made specially for Silberberg and Co. Ltd. Melbournescientific instrument, spherometer, h.b. silberberg & co ltd -
Federation University Historical Collection
Scientific Instrument, Specific Gravity: Metal Cube Set, c1970s
Used in the Physics laboratory for calculating/confirming relative density, or specific gravity, of given metal samples.10 x 2.5 cm metal cubes of differing types of metal, for measuring specific gravity of different metals. Contained in a white cardboard box.Number on each designating the material made frommetal cubes, specific gravity, scientific instrument, ferrous cubes, brass, copper, steel, lead -
Federation University Historical Collection
Instrument - Scientific Instrument, E. & G.W. Blunt, Sextant
A sextant is an instrument generally used to measure the altitude of a celestial object above the horizon. Sextant with a black timber (ebony?) frame, ivory graduated scales and brass attachments : vernier scale radial arm, mirrors and optical filterssextant, astronomy, scientific object, scientific instruments -
Flagstaff Hill Maritime Museum and Village
Container - Box
A ship's rudder indicator is used for measuring the angle of slope or pitch of the vessel. The information can be used to adjust the steering of the ship to give safe navigation. The rudder indicator transmitter once contained in this box was battery operated, according to the label inside this box. Box, wooden, used to store a battery operated Siemen's ship's rudder indicator. Made in the United Kingdom. Descriptive leaflet glued inside hinged lid. Lid secured by hooked catch. Brass latch. Metal mounting plate. Hole drilled in back. Dovetail joints. flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, siemen's brothers london, siemen's rudder indicator box, nautical instrument for measuring pitch or slope, scientific instrument box, navigational instrument box -
Flagstaff Hill Maritime Museum and Village
Head Rod, Dring & Fage, c. 1901
The Australian Customs Service, Melbourne, donated a set of gauging instruments, and Port Fairy Customs donated another instrument, the Sike’s Hydrometer, to Flagstaff Hill Maritime Village, all of which were no longer required. However these ullaging tools were in use for many years by Customs officials, called Gaugers. Ullaging is a term describing the measurement of the amount of liquid remaining in a container of spirits such as a cask or barrel. It can also measure the free space or head space remaining. The primary role of customs officers in Victoria was to calculate the tariff or excise duty payable on goods imported into Victoria. (Excise duty is a tax on goods produced within a country, and customs duty is imposed on imports.) Customs officers spent a great deal of their time measuring and weighing goods, and then calculating the amount of duty to be paid by the importer. The tariffs for different products varied, and officers consulted published lists. Calculating the duty payable on a barrel of brandy was a detailed task. The gauger had to measure the barrel to determine its volume. Barrels were irregular in shape, and finding the volume required several measurements and checking tables of figures. Alcoholic content was then measured with a hydrometer. The duty paid varied according to the alcoholic strength of the spirits. Uniform national customs and excise duties were operative in Australia from October 1901. These tools were still being used in Australia in the 1950’s. The Federal Government still imposes excise taxes on goods such as cigarettes, petrol, and alcohol. The rates imposed may change in February and August each year in response to changes in the consumer price index. ULLAGING TOOLS (1) Head Rod - this instrument measures the diameter of the heads (top and bottom ends) of a cask or barrel. The shaped brass pieces on the head rod enable the diameter of a barrel to be measured inside the chimes at the head end. The slide rule could then be used to calculate the internal volume of the barrel. On the reverse side is a set of ullaging scales, used like those on any ullaging rule, to calculate the volume of liquid in a partially filled barrel. (2) Bung Rod – this instrument measures the diameter of a cask or barrel when it is lying on its side. It is a rod that fits into the ‘bung’ hole of a cask and is long enough be extended to reach the opposite side of the cask. The brass sliding pointer can be moved to mark the ‘wet’ line. When the rod is removed the bung measurement can be read from the scale on the rod. (3) Long Calipers - this instrument measures the length of the cask between the heads. It has two rules sliding beside each other, each end having another piece of wood fixed firmly at right angles downwards then turned inwards at the ends so as to reach over the heads of the casks without touching the projecting ends. The centre pieces enable it to extend or contract, changing the distance between the two other parallel sides, the distance they are apart being shown by the rule on the sliding pieces. (4) Cross Calipers – this instrument is used to take the bung diameters of casks, or "the Cross " as it is called. This instrument has two rules sliding beside each other, each end having another piece of wood fixed firmly at right angles downwards, together forming a 3 sides of a rectangle with the centre pieces enabling it to extended or contracted, changing the distance between the two other parallel sides, the distance they are apart being shown by a the rule on the sliding pieces. (5) Sike’s Hydrometer – this instrument is used to gauge the strength of different alcoholic spirits when fitted with the different weights in the set. Every set is individually calibrated to ensure that it meets the exact Standard Weight and Measure compliance, then every piece in that set is stamped with the same number by the Calibrator, to ensure that the measurements are taken using the same hydrometer set. [References: A Handbook of Practical Gauging, Janes Boddely Keene of H.M. Customs, 1861, F. Pitman, London; Customs Act, Volume 2, No. 1, April 1999; Old Customs House website ] Head Rod, ullaging gauge. Long wooden rod made of three joined sections, brass hook on end, sliding centre section with hook, measurements marked along each section as on a slide rule. Used for measuring diameter of heads of casks in order for Customs to calculate excise (tax) on the contentsflagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, head rod, gauging rod, ullaging rods, measuring instruments, customs tax -
Flagstaff Hill Maritime Museum and Village
Barrel Calipers, Early 20th Century
The firm Dring and Fage were active from 1790 to 1940 in London and were manufacturers of hydrometers and mathematical instruments they became established in London in 1790 by John Dring, who was a brass worker and hydrometer maker, and William Fage. Dring and Fage manufactured also saccharometers and other instruments used to measure the strength of alcohol. These instruments were primarily used to calculate excises. They traded at various addresses in London and they were at 56 Stamford St. between 1903 and 1938. By 1850 the company was owned by Edward Hall and Edward Jenkin and in 1940 the company became Dring & Fage Ltd, trading till the 1960s.Historically, gauging has meant measuring a volume, these gauging instruments were used by Customs and Excise and manufacturers for determining the volume and contents of liquid containers. For Customs the determination and collection of duty on imported goods which has had a very long history. Chaucer was a Customs Officer as was his father and grandfather, excise was first officially introduced in 1643, with the aim of maintaining military forces raised by the English Parliament at that time. Excise was initially a duty on home produced alcoholic beverages and soap but being easily applied, spread rapidly to a wide range of goods including imports of varying kinds. The government departments of Customs and Excise merged only in 1909 and it is from around this time that our instrument was made and used. The item demonstrates a long social history of the practice of Government's collecting duty on alcoholic beverages and thereby makes this item historically significant as it was used locally at Port Fairy by the ports Customs agents. Boxwood barrel calipers, wooden slide-rule with right angles at each end and brass fittings used for measuring casks length."Dring & Fage Makers to the Customs" stamped on side.flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, customs, long calipers, excise duty, barrel calipers -
Flagstaff Hill Maritime Museum and Village
Engine Dynamometer, c.1890’s
... , fitted oak case. This brass instrument is used to measure... instrument is used to measure and record steam pressure for setting ...The steam engine indicator, or dynamometer, is an instrument used on a steam engine (such as that of a vessel or train) to measure and record the change in the pressures of the engine’s cylinders during their operating cycle. The engineer would use it to identify problems or defects such as bad valve settings or constricted steam pipes. It could indicate the difference in efficiency caused by adjustments made to the engine, being able to instantly measure the variation of pressure from the engine stroke at any given time. This force of power would be registered by a pencil, fitted to the adjustable arm, which would trace a line on paper wound around the cylinder. The recorded information could be used in conjunction with mathematical tables. This particular instrument was made by T.S. Mc Innes, one of the better manufacturers of engine indicators. Mc Innes engine indicators were still being used in the mid 1900’s. This specific instrument was used by Mark Forsythe of North Berwial, Scotland and late of Ararat, Victoria when he was chief engineer on the “SS Talawena” in 1892. The Port of Warrnambool, in Victoria, harboured steam ships that carried both passengers and cargo along the south west coast in the late 1800’s and into the 1900’s. The engineer of a steam ship was responsible for reaching and maintaining the optimum level of steam energy to serve the locomotion and efficiency of the steam ship. The engineer would use a steam engine indicator to measure and record information to achieve this purpose. Engine Dynamometer or Steam Engine Indicator in square, fitted oak case. This brass instrument is used to measure and record steam pressure for setting up and adjusting valves on a steam engine. It has an oscillating recording drum with vertical, silver clip attached for holding paper in place around the drum. The drum oscillates left to right. There is a pulley attached to a length of cord, which is attached to the drum. Beside the drum is a fine metal arm, vertically adjustable, small hole in the end to hold a pencil. Inscription stamped into bracket of the arm. The engine indicator is mounted on a hinged side of the case that swings out ready for use. Attached chains prevent the side from opening past vertical. There is storage for other accessories and an empty compartment in the base (where a scale or ruler may have been located). The case has a collapsible wooden handle, brass hinges and two brass, hook-shaped catches. There is a code stamped inside the lid. It contains a brass, ‘T’ shaped steam-cock (or stop cock) with two open ends made of metal pipe with different sized threads. (Turning the handle on top opens and closes the space in the pipe and would close off the flow of steam from one end to the other.) Also inside the case are three different spiral springs, each with a threaded nut on the end that has a threaded hole inside it. Used by Mr Mark Forsythe when chief engineer on the SS Talawena in 1892 “T.S. MC INNES PATENT” and “522 _ _” (last 2 digits are unreadable) pressed into the arm of the brass indicator. “[ ] X ’ stamped inside the lid of the case. The 3 springs all have a number stamped into them: (1) “32” and “12” (2) “12” and “16” [above] “12” (3) “64” and “150” Card that came with instrument “This instrument was used by Mark Forsythe of North Berwial Scotland and late of Ararat, Victoria when chief engineer on the SS Talawena in 1892" dynamometer, steam engine indicator, t.s. mcinnes, glasgow, dobbie mcinnes, port of warrnambool, warrnambool, flagstaff hill, flagstaff hill maritime museum, flagstaff hill maritime village, maritime museum, shipwreck coast, great ocean road -
Flagstaff Hill Maritime Museum and Village
Optometer Stands, Early 19th Century
Optometrists are trained to examine eyes and prescribe visual aids such as spectacles. The optometer pictured in the media section of this document dates from the 1800s. The optometer was used with various lenses to determine the refraction of the eye. Refraction means the extent to which light is bent by an individual's eye. The result can determine how short-sighted or long-sighted they are, and the strength of spectacles required. In the second half of the 1800s, ophthalmologists also devised instruments to measure the separate components of vision. Dr Jules Badal developed the pictured instrument in 1876. It was based on an optometer invented by William Porterfield in 1759. The brass stands look as though they were made for an optometer to be table mounted, with heavy brass stands and designed to hold a cylindrical object securely as would be required by an optometer. Stands appear to have been very well made and very early probably early to mid 19th Century by a well known scientific instrument maker given there are no inscriptions or marks to indicate the time period made or maker it is difficult to assume significance to these items at this point in time as well as the items are incomplete.The brass stands believed to be for mounting an early Optometer an (ophthalmic instrument) Noneflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, stands for scientific instrument -
Kiewa Valley Historical Society
Tape Measure 33ft, Early to mid 1900's
This flexible measuring tape was used by the SEC Victoria in the mid to late 1900's. It was in a period before digital measuring instruments were in use. This is a 33ft long tape measure and would have been used by the construction workers when building the Kiewa Valley Hydro System. The warning details (embossed into the leather covering) was to warn users to be careful not to use the tape near live electricity terminals or linkages. This tape was produced mainly for wooden structures and not electricity conductive material. This was during the 1950's to 1960's.This imperial tape measure is very significant to the Kiewa Valley as it was used in the construction of the Kiewa Valley Hydro Scheme of the 1950's-1960's. It provides evidence that small measuring equipment used in the construction and the continuing maintenance of the scheme was of the imperial measure and used by construction workers who remained and settled in the town of Mount Beauty and Kiewa Valley long after the construction period. This flexible metallic measuring tape (33 ft in length) is contained in a round circular leather bound container. It has brass fittings (winder and tape guide) and is stitched with heavy grade twine. The tape measure is graduated in feet and inches on one side and yards on the other. Embossed in the leather casing"MADE IN ENGLAND" and around the inner circle "HOCKLEY ABBEY" and "JOHN RABONE & SONS"imperial tape measure, distance measures, imperial tools -
Bendigo Military Museum
Equipment - CLINOMETER & CASE, Made in Australia D up arrow D, 1) 1943; .2) 1944
.1) Clinometer Mortar MKIII, brass,machined, with curved graduated markings. Centre is a bock with bubble in cross hairs. .2) Heavy leather case with ends sewn in. Rear has 2 leather keepers for a belt. Case shuts via strap & brass button..1) “TARGET - F TOUCH 1943 'A.3457'” .2) CASE. “MOR CLINO MKI (scratched on '3389') RB up arrow DCD 1944”instruments - measuring, containers - commercial, military history, clinometer -
Learmonth and District Historical Society Inc.
Scales, "Circa 1863"
This set of scales would have been used to check the acuracy of Weights and Measures.Where it was used is unknown, but it may have always been part of the Shire.The maker was J.D.Potter,Poultry,London Middlesex,U.K. One of several sets of scales of various sizes in collection of Learmonth And District Historical Society Inc.To measure precise weights,the instruments used were a set of precise balanced scales. Set on a wooden box,( which would have contained the weights).It is made of brass and has a brass beam balance,steel pointer with index and twin pans. Date 25/1/1865.Various hallmarks similar to "jewellers".tools, and, scales, weights, measures, potter london, measuring devices -
Orbost & District Historical Society
sovereign balance
This simple brass see-saw balance was used to test the gold sovereign coin and its half for wear, and to detect counterfeit coinsSovereigns and half sovereigns are no longer in use.A metal sovereign balance with two measuring plates and weight. Counterweighted desktop rocker tests for British gold Sovereigns and Half Sovereigns, both weight and thickness. It has the original green box with label on lid top.Front - sovereign - half - Askey's improved warranted - son -Bush'ssovereign-balance instrument weighing sovereign -
The Cyril Kett Optometry Museum
Prisoptometer, Geneva Optical Company, Dr Culbertson's Prisoptometer, 1886 (estimated); late 19th century
How widely the prisoptometer was used is unclear but the Standard Optical Company later patented a new model, The Standard Prisoptometer, on June 21, 1904. Edward Jackson's crossed cylinder technique of determining astigmatism was first detailed in the Transactions of the American Ophthalmological Society (1887)4:595-598. The convenience of Jackson's crossed cylinder lenses over the prisoptometer in weight, cost, portability and reliability meant that they were soon almost universally adopted.This is a rare item as few are known world wide.This instrument is an optometer, that is, a device to measure the refractive error of an eye. It is made of cast iron, steel, brass and glass. It contains a prism which could be rotated, and was used to view a disc or an object circle. The prism caused monocular doubling of the object circle and the separation of the two images varied as the prism rotated, depending on the astigmatism present. The axis of the astigmatism was indicated by the prisoptometer and trial lenses were used to determine the the magnitude of the spherical and cylindrical refractive errorImprinted:"DR CULBERTSON'S PRISOPTOMETER/ GENEVA OPTICAL COMPANY MAKERS, GENEVA, N.Y./ PATENTED SEPT, 21, 1886". Stamped "853" on eyepiece and lens mounting.optometry, prisoptometer, optometer, astigmatism, refractive error, refraction, culbertson -
Warrnambool and District Historical Society Inc.
Instruments, Measuring tool, CLate 19th century
... Instruments Measuring tool Brass, circular instrument with fold out ...This instrument is a folding arm protractor. It is used for measuring angles on the vertical and horizontal planes. The two folding arms have small metal support springs where they are attached to provide support and the other ends have pins with which to mark particular points. A screw mechanism on the rim allows fine tuning of plotting. Chadburn, Brothers were fine instrument makers of Sheffield making optical and nautical instruments during the 19th century. This item was donated by a local resident whose grandfather Carl Spence was a bridge builder who worked on the Warrnambool Breakwater extension c 1919. This item has scientific significance which is possibly linked via the owner to one of Warrnambool's most well known landmarks.Brass, circular instrument with fold out sections which are hinged and a movable section. The circular part is marked in degrees around the circle. Notches on inner rim at 90 degrees intervals. Chadburn ,Brothers Sheffield. Graduated scale measuring 360 degrees.warrnambool, warrnambool breakwater -
Maldon Vintage Machinery Museum Inc
Manometer
Gauge for measuring pressure. Blue anodised diecast casing. Vestige of plastic tube emerging from the top. Hand operated brass pump on the bottom.Noneinstruments, pressure -
Maldon Vintage Machinery Museum Inc
Circular Slide Rule Calculator, First half 20th century
.1) Hinged lid wooden box with brass fittings and green felt covered rests inside. .2) "Fuller" type circular slide rule calculator Model No. 1. .3) Brass stand which slots into one end of box and holds calculator in position for ease of use. .4 ...7) Instruction booklets for operating the calculator. .8) Letter from importer re enquiry for circular slide rules to be used at Thompsons Engineering and Pipe Works.Imprinted on bakelite base of cylinder "Stanley / Trade Mark".trades, drafting, instruments, measuring -
Stawell Historical Society Inc
Instrument - Realia, Engineering Instruments from Northern Grampians Shire
1: Small cardboard box with lid containing Silver distance Measurer. This was used for Measuring distances on plans.(Planimeter) 2: Cardboard Box without lid containing three plumbobs: One large turned brass: one small turned metal. One circular silver coloured metal complete with string and winding board. These were used to locate survey equipment above a fixed point. 3: Timber ( Vic Ash?) dovetailed box with brass hinged lid and brass swing catches containing plywood templates called railway curves, used for drawing curves on plans. 4: Cardboard box with lid containing Allbrit panimeter in Bakelite/plastic box with silver metal hinges and catches "Shire of Kara Kara" inscribed on the box. The box contains the original Instructions. The Planimeter was used for calculating areas of Irregular shapes and used for estimating quantities from plans of cut and fill projects, as one example. 5: Timber Box with brass hinges and swing catches wand leather carry Strap containing one set of self adjusting level made by E.R. Watts and Son, London England. Paper label on the inside "Shire of Stawell". Also had paper instructions pasted to the inner lid. The level was used for taking Ground Levels. The first 3 have been in use up until the 1990's, when computer drafting took over the role of these instruments with greater speed and accuracy. The dumpy level would have been superseded in the 1980's when automatic levels became cheaper, and were more accurate. stawell -
Flagstaff Hill Maritime Museum and Village
Instrument - Letter Scale, Late 19th Century
Before 1851, letters sent through the mail were charged by the number of sheets it contained and the distance it travelled. For example, a letter consisting of one sheet of paper was charged the single rate; a double letter, that is two sheets, was charged double the single rate, a treble letter, was charged three times the single rate, and so on. In other words, each additional sheet of paper increased the charge by one rate. In Great Britain. Sealing a letter in an envelope effectively put an end to postal clerks' ability to count the number of sheets in a letter and an alternative method of determining the postage had to be found. Overweight mailings had previously required the items to be weighed but with the introduction of the Uniform Penny Postage act of 1839, the public could mail a letter not exceeding a half-ounce in weight within the United Kingdom for one penny if prepaid, or two pence if paid on delivery. At about the same time that the adhesive postage stamps and envelopes made their appearance, postal administrations began to experiment with strategically placed street letter boxes, known as pillar boxes because of their round, pillar-like shape, that permitted the public to mail letters from a place other than from a post office. For all these reasons, the use of postal scales became the nucleus of every post office. Scales had been in use since ancient Egyptian times so their use for everyday commerce was not unusual in the 1800s. What was new in 1840 was their ubiquitous use throughout the postal system. No post office could function effectively without one. Although the earliest scales used in post offices did not differ markedly from the ones in general use as time went on they were adapted specifically for postal use. For example, a paper sleeve, also known as a weight sticker, was attached that showed the applicable rate of postage for any given weight. This innovation was quite a time saver as postal clerks no longer needed to weigh the item first and then refer to a separate chart to determine the required postage for that particular weight. Victorian postal scales were used in village Post offices in the late 19th century, of which there are many examples today for sale. No maker can be attributed to the manufacture of the item. Postal scales with weights,. Balance scale has brass fittings and is mounted on a rectangular wooden stand, with depressions for brass weights; which measure 1/2oz, 1oz, 2oz, "Young Aton REL., C.N.0.9."flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, scales and weights, balancing scales, postal scales, letter scale -
Flagstaff Hill Maritime Museum and Village
Instrument - Letter Scale, Philip Jakob, Maul, 1930s
Jakob Maul (1866-1953) founded a metal works factory in 1912 at Zell in Odenwald not far from Frankfurt. He was born the son of a winegrower from the Rheinhessen region of Germany that lies on the left bank of the river Rhine. At the age of 45, he started a metal works factory to produce various types of scales but during the second world war the factory was bombed and production ended. Production for the manufacture of scales resumed in 1948. In 1953 at his death Jakobs son Fritz Scharmann an engineer who had been working with his father since 1923 took over the management of the Maul companies. In 1970 the production responsibilities for Philip J Maul was taken over by Porti Office Equipment who was based in Hamburg. The company has undergone several integrations with subsidiary companies. Today the company has diversified into different areas one of which is manufacturing solar scales. An original postal scale made in Germany before the Second World War and regarded today as a collector's item. It is significant as it is a snapshot into the past and how everyday vintage items were used and interacted within society in the 1930s.Antique German Jacob Maul "Concav" brass postal or letter scale, quadrant type, with pendulum, measuring up to 9ozs. The scale has a level-adjusting screw.The balance is marked "CONCAV" and graduated in imperial ounces to 9 ozflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, scale, quadrant scale, postal weight, 9 oz, philip jakob, maul, scale manufacturer, german industry, weighing instrument, inclination scale -
Flagstaff Hill Maritime Museum and Village
Gauging Rod, 1903-1938
The firm Dring and Fage were active from 1790 to 1940 in London and were manufacturers of hydrometers and mathematical instruments they became established in London in 1790 by John Dring, who was a brass worker and hydrometer maker, and William Fage. Dring and Fage manufactured also saccharometers and other instruments used to measure the strength of alcohol. These instruments were primarily used to calculate excises. They traded at various addresses in London and they were at 56 Stamford St. between 1903 and 1938. By 1850 the company was owned by Edward Hall and Edward Jenkin and in 1940 the company became Dring & Fage Ltd, trading till the 1960s. Historically, gauging has meant measuring a volume, these gauging instruments were used by Customs and Excise and manufacturers for determining the volume and contents of liquid containers. For Customs the determination and collection of duty on imported goods which has had a very long history. Chaucer was a Customs Officer as was his father and grandfather, excise was first officially introduced in 1643, with the aim of maintaining military forces raised by the English Parliament at that time. Excise was initially a duty on home produced alcoholic beverages and soap but being easily applied, spread rapidly to a wide range of goods including imports of varying kinds. The government departments of Customs and Excise merged only in 1909 and it is from around this time that our instrument was made and used. The item demonstrates a long social history of the practice of Government's collecting duty on alcoholic beverages and thereby makes this item historically significant as it was used locally at Port Fairy by the ports Customs agents. Gauging rod or bung rod; ullaging gauge. Long brown wooden gauging rod with brass tips and sliding brass marker. Measurements are marked along the length of the rod. Used for measuring volume of liquor in casks in order for Customs to calculate excise (tax) on the contents. Made by Dring & Fage, London.Engraved “Dring & Fage 56 Stamford St London flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, gauging rod, ullaging rods, measuring instruments, customs tax, dring & fage, alcohol measurement -
Flagstaff Hill Maritime Museum and Village
Equipment - Sextant, Late 20th Century
In 1941, the scientific instrument manufacturing firms of Henry Hughes & Son Ltd, London, England, and Kelvin Bottomley & Baird Ltd, Glasgow, Scotland, came together to form Kelvin & Hughes Ltd. Kelvin Company History: The origins of the company lie in the highly successful and strictly informal relationship between William Thomson (1824-1907), Professor of Natural Philosophy at Glasgow University from 1846-1899 and James White, a Glasgow optical maker. James White (1824-1884) founded the firm of James White, an optical instrument maker in Glasgow in 1850 and was involved in supplying and mending apparatus for Thomson university laboratory and working with him on experimental constructions. White was declared bankrupt in August 1861 and released several months later. In 1870, White was largely responsible for equipping William Thomson laboratory in the new University premises at Gilmore hill. From 1876, he was producing accurate compasses for metal ships to Thomson design during this period and this became an important part of his business in the last years of his life. He was also involved in the production of sophisticated-sounding machinery that Thomson had designed to address problems encountered laying cables at sea, helping to make possible the first transatlantic cable connection. At the same time, he continued to make a whole range of more conventional instruments such as telescopes, microscopes and surveying equipment. White's association with Thomson continued until he died. After his death, his business continued under the same name, being administered by Matthew Edwards (until 1891 when he left to set up his own company. Thomson who became Sir William Thomson and then Baron Kelvin of Largs in 1892, continued to maintain his interest in the business after James White's death. In 1884 raising most of the capital needed to construct and equip new workshops in Cambridge Street, Glasgow. At these premises, the company continued to make the compass Thomson had designed during the 1870s and to supply it in some quantity, especially to the Admiralty. At the same time, the firm became increasingly involved in the design, production and sale of electrical apparatus. In 1899, Lord Kelvin resigned from his University chair and became, in 1900, a director in the newly formed limited liability company Kelvin & James White Ltd which had acquired the business of James White. At the same time Kelvin's nephew, James Thomson Bottomley (1845-1926), joined the firm. In 1904, a London branch office was opened which by 1915 had become known as Kelvin, White & Hutton Ltd. Kelvin & James White Ltd underwent a further change of name in 1913, becoming Kelvin Bottomley & Baird Ltd. Hughes Company History: Henry Hughes & Sons were founded in 1838 in London as a maker of chronographic and scientific instruments. The firm was incorporated as “Henry Hughes & Sons Ltd” in 1903. In 1923, the company produced its first recording echo sounder and in 1935 a controlling interest in the company was acquired by S Smith & Son Ltd resulting in the development and production of marine and aircraft instruments. Following the London office's destruction in the Blitz of 1941, a collaboration was entered into with Kelvin, Bottomley & Baird Ltd resulting in the establishing “Marine Instruments Ltd”. Following the formal amalgamation of Kelvin, Bottomley & Baird Ltd and Henry Hughes & Sons Ltd in 1947 to form Kelvin & Hughes Ltd. Marine Instruments Ltd then acted as regional agents in the UK for Kelvin & Hughes Ltd who were essentially now a part of Smith's Industries Ltd founded in 1944 and the successors of S. Smith & Son Ltd. Kelvin & Hughes Ltd went on to develop various marine radar and echo sounders supplying the Ministry of Transport, and later the Ministry of Defence. The firm was liquidated in 1966 but the name was continued as Kelvin Hughes, a division of the Smiths Group. In 2002, Kelvin Hughes continues to produce and develop marine instruments for commercial and military. G. Falconer Company History: G Falconer (Hong Kong Ltd) appear to have had a retail presence in Hong Kong since 1885, according to the company website, and currently have a shop in the Peninsula Hotel. G Falconer was the Hong Kong selling agent for several British companies. Ross Ltd of 111 New Bond St London was one and the other was Kelvins Nautical Instruments. Falconers were primarily watchmakers, jewellers and diamond merchants.They were also agents for Admiralty Charts, Ross binoculars and telescopes, and sold English Silverware and High Class English Jewellery. In 1928 the company was operating from the Union Building opposite the Hong Kong general post office. It is unclear if the item is an original Sextant made by Kelvin prior to his amalgamation with Henry Hughes & Sons in 1941 as Kelvin appears to have only made compasses up to this date. If the Sextant can be established that it was made by Kelvin then it is very significant and a rare item made for and distributed through their Hong Kong selling agents G Falconer Ltd. There are many Sextants advertised for sale stating "Kelvin & Hughes 1917 model sextant". These can be regarded as replicas as the company was not formed until 1941 and production of marine instruments was not fully under way until after the war in 1947. Further investigation needs to be undertaken to accurately determine the provenance of this item. As the writer currently has the impression that the subject object was possibly made by Kelvin and Hughes in the mid to late 20th century or is a replica made by an unknown maker in the late 1970s. Purchased as an exhibition prop for the Flagstaff Hill collection. The Sextant is a brass apparatus with filters and telescope lens, and comes with a wooden felt lined storage box. It is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary use of a sextant is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation.G Falconer and Co. Hong Kong (retailers of nautical equipmentflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, sextant, kelvin & hughes ltd, hong kong, navigational instrument, g falconer, mariner's quadrants -
Flagstaff Hill Maritime Museum and Village
Instrument - Barometer, Early 20th century
A barometer is an instrument used for measuring atmosphere pressure thus determining weather changes.The first apparatus generally accepted as a barometer was that set up in Florence in 1644 by Evangelista Torricelli (1608–1647), a mathematician and physicist. Torricelli filled a glass tube with mercury, sealed it at one end, and inverted it with its open end in a dish of mercury. The level always fell a short way down the tube, then settled at a height of about thirty inches. He concluded correctly that the mercury column was sustained by the weight of the air pressing on the open surface of mercury, and further experiments convinced him that the space above the mercury in the tube was a vacuum. He noted that the level rose and fell with changing temperature, but he was unable to use his apparatus to measure variations in the weight of the atmosphere because he had not foreseen that temperature would affect the level of the mercury. News of this experiment circulated quickly among European scientists, who hastened to replicate the experiment. Torricelli's conclusions were not universally accepted because some disputed whether the air had weight, while both Aristotle and the Catholic Church denied the possibility of a vacuum. In France, the philosopher René Descartes (1596–1650) seems to have been the first person, probably in 1647, to attach a graduated scale to the tube so that he could record any changes attributable to the weather. At around this time Duke Ferdinand II of Tuscany organized the first short-lived meteorological network among scientists in other Italian cities, gathering observations of pressure, temperature, humidity, wind direction, and state of the sky.Theis barometer is an example of a household item from the early 20th century, used to determine the day's weather. The barometer is significant as an aid to human social, material and scientific development.Barometer, round, brass housing inset into carved wooden casing (lacquer mostly worn off). Decorative lettering for weather conditions "Stormy, Rain, Change, Fair, Very Dry". Workings are visible through opening in centre of dial. Indicator needle and another adjustable needle . Hook screwed into back of case.flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, barometer, scientific instrument, weather forcasting instrument, weather gauge -
Flagstaff Hill Maritime Museum and Village
Instrument - Drainage Level, 1750-1795
Adams jnr wrote many elementary scientific works, as well as on the use of mathematical instruments. He often combined in his written works with religious themes and scientific content, often against the prevailing thoughts of the time. According to one popular magazine of the time (Gentleman's Magazine), his works were often accused of "growing errors of materialism, infidelity, and anarchy". He started writing at a young age and developed a love for it, his main interests included math and science, these subjects he often expressed in his written essay's. Notable works from Adams are. An Essay on Electricity, and Magnetism (1784). Essays on the Microscope (1787). An Essay on Vision, briefly explaining the fabric of the eye (1789). Astronomical and Geographical Essays (1790). A Short Dissertation on the Barometer (1790). Geometrical and Graphical Essays, containing a description of the mathematical instruments used in geometry, civil and military surveying, leveling and perspective (1790). Lectures on Natural and Experimental Philosophy, in five volumes (1794).George Adams Sr and Jnr were both notable opticians and scientific instrument makers of the 18th century. Their contribution to scientific innovation and optical development cannot be underestimated. Having one of their early drainage levels in the collection and in extremely good condition is an asset to the Flagstaff collection.Drainage level or optical level. A brass surveying instrument with Achromatic telescope, bubble level and dial fitted to the Tribrach or footplate that has leveling screws. Tripod is wood and brass with adjustable and unscrewable legs (for ease of transportation). Made by "G. Adams Fleet St, London". Used in surveying and building to transfer, measure and/or set horizontal levels."G. Adams - London".flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, george adams fleet street london, optical instrument, scientific instrument, technical instrument, surveyors level, george adams snr, projection microscope -
Flagstaff Hill Maritime Museum and Village
Barometer, 1858-1869
The barometer was either made or sold by T. Gaunt & Co. of Melbourne, a manufacturer, importer and retailer of a wide variety of goods including jewellery, clocks and watches, navigational and measuring instruments, dinnerware, glassware and ornaments. Thomas Gaunt photograph was included in an album of security identity portraits of members of the Victorian Court, Centennial International Exhibition, Melbourne, 1888. (See below for further details.) Admiral Fitzroy Pattern Barometer History: The stick mercury barometer was named after Admiral Robert Fitzroy of the Royal Navy (1805-1865) for his detailed instructions on how to interpret the weather, which were included with the instrument. Fitzroy was the captain of the HMS Beagle, also a weather forecaster to Charles Darwin and the second Governor of New Zealand. He developed many different types of barometers and was the first person to introduce the science of weather forecasting to the British Isles. A local manufacturer of scientific instruments, Thomas Gaunt, produced the barometer that was adapted for the southern hemisphere by Robert Ellery, the State Astronomer based at the Melbourne Observatory. In the original sale catalogue for Gaunt's, the item is described as "Gaunt's Fitzroy Barometers" and it was priced from 25/- to ₤9.9s. History of Thomas Gaunt: Thomas Gaunt established Melbourne's leading watchmaking, optical and jewellery business during the second half of the 19th century. Gaunt arrived in Melbourne in 1852, and by 1858 had established his own business at 14 Little Bourke Street. Around 1869 he moved to new premises in Bourke Street on the corner of Royal Arcade. Gaunt's shop quickly became a Melbourne institution. Gaunt proudly advertised that he was 'The only watch manufacturer in the Australian colonies'. While many watches and clocks may have had Gaunt's name on the dial, few would have been made locally. Gaunt did make some watches for exhibitions, and perhaps a few expensive watches for wealthy individuals. Gaunt's received a telegraph signal from Melbourne Observatory each day to correct his main clock and used this signal to rate and repair ship's chronometers and good quality watches. His main horological manufacturing was directed at turret clocks for town halls, churches and post offices. These tended to be specific commissions requiring individualised design and construction. He made the clock for the Melbourne Post Office lobby, to a design by Government Astronomer Robert Ellery, and won an award at the 1880-81 Melbourne International Exhibition for his turret clock for the Emerald Hill Town Hall. He became well known for his installation of a chronograph at Flemington Racecourse in 1876, which showed the time for the race, accurate to a quarter of a second. The firm also installed the clockwork and figures for Gog and Magog in the Royal Arcade. Thomas Gaunt also developed a department that focused on scientific instrumentation, making thermometers and barometers (from imported glass tubes), telescopes, surveying instruments and microscopes. Another department specialised in electroplating for trophies, awards and silverware, and the firm manufactured large amounts of ecclesiastical gold ware and silverware, for the church including St Patrick's Cathedral. There are no records that disclose the number of employees in the firm, but it was large enough for Gaunt to hold an annual picnic for the watchmakers and apprentices at Mordialloc from 1876; two years previously they had successfully lobbied Gaunt to win the eight hour day. Gaunt's workforce was reportedly very stable, with many workers remaining in the business for 15 to 30 years. Gaunt's wife Jane died on September 1894, aged 64. They had one son and six daughters, but only three daughters survived to adulthood. Two became nuns at the Abbotsford Convent and one daughter, Cecelia Mary Gaunt (died 28 July 1941), married William Stanislaus Spillane on 22 September 1886 and had a large family. Gaunt died at his home in Coburg, Victoria, leaving an estate valued at ₤41,453. The business continued as T. Gaunt & Co. after his death. The barometer is historically significant as an example of the work of Melbourne’s leading scientific instrument maker, Thomas Gaunt. The barometer has social significance as an example of the type of scientific equipment that Thomas Gaunt expanded his horology business into producing. Further social significance lies in the fact that Robert Ellery, the Government Astronomer who designed the local version of the barometer, had a direct connection with the Melbourne Athenaeum founded in 1839 as the Melbourne Mechanics' Institution. Its purpose was "the diffusion of literary, scientific and other useful information". There are also records of a T Gaunt as a subscription and committee member of this the Athenaeum organisation during the 1870s and 1880s which may be Thomas Gaunt, unfortunately still unverified.Stick mercury barometer known as the Admiral Fitzroy Barometer. It comprises an oblong wooden case with glass front panel, ornate pediment, barometer with bulb cistern (empty of fluid), cleaning brush with printed instructions for interpreting information given by the gauge affixed to left and right face of instrument. Includes a thermometer. The barometer appears to be intact. Adapted to the Southern Hemisphere. Special remarks by Admiral Fitzroy. Made by Thomas Gaunt, Melbourne. Manufacturer's details are on back of wooden casing. Rear has upper and lower brass screw plates for securing to vertical surface."Manufactured by Thomas Gaunt, 14 Little Bourke Street, Melbourne. "flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, barometer, admiral fitzroy, thomas gaunt, thomas gaunt of melbourne, clockmaker, admiral fitzroy barometer, barometer instructions, gaunt’s fitzroy barometer, gaunt’s of melbourne, gog and magog designer, horological manufacturer, meteorological instrument, melbourne athenaeum, melbourne mechanics' institution, melbourne observatory time signal, robert ellery government astronomer, scientific instrument, stick mercury barometer, thermometer, weather forecast, t gaunt & co