Used before the invention of electronic calculators, mechanical adding machines were most often used for long calculations. This calculator was used in the Ballarat School of Mines Physics Department. Addition and subtraction were perfomed by turning the larger side mounted crank forward or backward. the smaller crank lever zeros the two registers. Two buttons are provided to set the machine either to clear the number entry with each revolution of the crank or to repeat the entry. The largest button resets the keybord to all 0s.A calculator with shiftable carriage and digit separator rods between each row of keys.ballarat school of mines, calculator

The core memory of this calculator was a #D metal box. The pin must have been attached to a card reader or keyboard to enter the programme. According to Sharp’s serial numbering scheme, which encodes the month and year of manufacture of their electronic calculators at least through the mid-1970’s, this calculator was manufactured in September 1969. The technology used in the Memorizer 30/Memorizer 60 was very typical of that of the late 1960s, with small-scale integrated circuits containing a few gates or flip-flops, and a magnetic core memory array for storing the program steps that the user keyed in using the calculator attached to the device. (with thanks to Rick Bensene, Curator of the Old Calculator Museum, Beavercreek, Oregon, USA) ISharp Memorizer 60 (Model CSA-12). The Model CSA-12, called the "Memorizer 60", was an accessory that could be connected to a Sharp Compet 22 or Compet 32 electronic calculator to allow these machines to be "learn mode" programmed. Programs were "learned" from the keyboard of the calculator, and stored within a core memory array in the Memorizer 60. Programs of up to 60 steps could be stored. The Memorizer 60 could them "play back" the stored steps at high speed, to allow relatively complex math operations to be performed. (http://www.oldcalculatormuseum.com/m-sharpcsa12.html)Serial No. 910 106 09Bcalculator, memorizer 60, computers, programmable calculator, electronic calculators

The "Burroughs Calculator" was a non-printing key-driven machine introduced in 1912 in response to the success of the Felt & Tarrant "Comptometer". The first Burroughs key-driven machine was very similar to the Comptometer in its external appearance, but was quite different in its internal mechanism, with the register and carry mechanism based on a complex system of planetary gears. It was only about two-thirds of the weight of the Felt & Tarrant machine, and had none of the safety features. In particular, there was no protection against incomplete keystrokes in either direction. The register would simply advance in proportion to the depth of stroke, with no indication of error. However, the price was also about two-thirds of the Comptometer, which made it quite a popular (if dangerous) machine. (http://home.vicnet.net.au/~wolff/calculators/Burroughs/Burroughs.htm) The Burroughs Portable Adding Machine introduced in 1925 became the basic design for the adding machine for many years, until the ten key adder was introduced and started to replace it gradually. The key-driven type machine did not print, and while it was often used as an adding machine, it developed into a special purpose machine in later years. The machine was very fast . The efficient operation of these machines required an experienced operator who often received a high salary. The machine was produced over a very long period because of its unique capabilities and was often used to verify product delivery lists from delivery routes. Later models of the machine, called a duplex design, could hold a running total in a second set of dial wheels while the primary wheels continued to add and subtotal amounts that could be transferred at any time to the running total. A side note, Burroughs copied the Felt design for its first models and was sued for patent infringement by Felt and Tarrant who prevailed in the suit. As a result, Burroughs totally redesigned their machine and went on to compete with the Felt machine for decades. Info from (http://www.burroughsinfo.com/group_d.htm) Black metal low keyboard manual adding machine. The key-driven type machine did not print, and was exceedingly fast and experienced operators could easily outrun an operator on a full keyboard or 10-key adding machine. The adding machine has a brown leather carry case.calculator

Colour photograph of a battery operated calculator.calculator, mathematics

Used in the Physics Department at the Ballarat College of Advanced Education (Now Federation University.Desk-top electric calculator with 16 digit electronic display; 4 memories; operations controlled by keyboard. Type: Sharp Compet 363P; Serial No. 11110811Metalic adhevise strip label: "Ballarat C.A.E. PHYSICS"ballarat college of advanced education, physics, sharp, electronic calculator, calculator

A 7.62 wind calculator to determine wind strength and wind allowance. Yellow plastic square with circular dial overlaidwind calculator

Willgodt T. Odhner invented his very successful “pinwheel” four-function calculator mechanism in Russia in 1874, and his invention was cloned by numerous companies, resulting in dozens of similar models that remained in wide use for almost a century. Numbers are dialed into the sliding levers on the top part of the machine, and are added to the register visible in the carriage at the bottom when the large crank is turned. Shifting the carriage sideways allows multiplication through a sequence of addition operations; the two small cranks zero the registers. The design includes ingenious error-preventing interlocks between all the controls: should the operator fail to return a crank to its resting position, the other controls are frozen until this is corrected. A bell indicates calculations in the negative. Used in Ballarat Institute of Advanced Education (B.I.A.E) Physics department.Black, mechanical calculating machine. Metal. Hand-operated, with three hand-cranks. 10x10 rotor with 13 digit result. Ser. No. 29-286781.5 Black symotape on base front: "PHYSICS". Maker's identification on top surface. Supplier's label (metal, silver & blue) on back: "STOTT & HOARE Pty. Ltd. 171 William St. Melbourne C1 M1991". Stamped on rear panel: "MADE IN SWEDEN". Cast lettering on underside: "M-602 07".calculating machine, pinwheel, calculator, scientific instruments, stott & hoare pty ltd, physics, odhner, ballarat institute of advanced education

Course and Speed Calculator MKII - Air speed in MPH and Knots. Wind Speed and direction. In original wooden box. Used on aircraft.RAF Ref. No. 6B/125 - RCAF Ref. No. 6B/52 No. ST2473/40 Anson/Oxford Serial No. 3441S/40 Box Ref. No. GB/120a8

Used in the Physics Department at the Ballarat College of Advanced Education.Desk-top electric calculator with 16 digit electronic display; 4 memories; operations controlled by keyboard. Type: Sharp Compet 363P; Serial No. 11110811Metalic adhevise strip label: "Ballarat C.A.E. PHYSICS"ballarat college of advanced education, physics, sharp, electronic calculator

Used in the Ballarat Institute of Advanced Education, Physics Department as a stand-alone unit or it could be connected to the Sharp Memorizer - 60 if one was available.Desk-top electric calculator with 16 digit electronic display; 2 memories;operations controlled by keyboard. Type: Sharp Compet 32, Model C5 - 32C Serial No. 912908With dymo tape labels: "1st YR"; "PHYSICS"; "PURCHASED 6/11/69" Gold sticker: "Edwards Sales and Service 42 3951"electric calculator, ballarat institute of advanced education, physics department

This speaking calculator was designed to perform several functions as well as memory, in synthetic voice. With two modes - visual or visual plus voice - it was powered by a nickel cadmium rechargeable battery or by a special adaptor from mains supply voltage. Dark brown rectangular box with numerical and mathematical keyboardTSIassistive devices, audio equipment, office equipment and supplies

This item was purchased by Geoff Biddington, and donated after his death. It is believed to have been used at the Woomera Rocket Range.Cylindrical timber spiral slide rule with timber box. 808 L.R.W. 36fuller calculator, calculator, scientific instrument, biddington, woomera, woomera rocket range, slide rule, scientific objects, scientific instruments

scientific instrument, cylinder slide rule, cylindrical logarithmic slide rule

This calculator is like a modern calculator style keypad with a traditional pinwheel calculator. In operation it is similar to other Facit machines. The design from the 1930s was produced without interruption with only slight modifications until the early 1970s.This one hasn't a serial number or Model Number so date is unknown but probably the 1940s - 1950s when the SEC were constructing the Kiewa Hydro Electric Scheme.Used by the SEC Office Staff when the SECV were constructing the Kiewa Hydro Electric SchemeBox shape with grey steel top and sides on a black base. Three thin strips of stainless steel embossed with numbers on the top and clear panels beside them. Front has 3 red and 10 black knobs with arrows on the red and numbers on the black. Sides have stainless steel pedals and winders. The machine is very heavy. See on-line "mechanical calculators.wordpress.com"'Facit' on the front.calculator, facit

Log Calculator - IRISH MKII was presented to MAJ. K HERDMAN by Intmed CSE 84/85 by way of a good humoured joke, Part of the KEVIN JOHN HERDMAN, 397661, collection. Rectangular plywood object with a variety of numbered circular holes. Printing on the front is in black.Printed on front in black: “LOG CALCULATOR, IRISH MKII. Presented to MAJ. K. Herdman by Intmed Cse 84/85 “."memorabilia, kevin john herdman

First programmable calculator used by Thompsons Castlemaine Ltd..1) Hewlett Packard programmable calculator model HP9100A. Cream coloured metal housing. Four segment keyboard with keys coloured grey, cream and fawn. .2) Selection of 10 diagnostic cards for above in a plastic case with a clear plastic hinged push back lid..1) Serial number on rear plate "816-00508". .2) Cards part number 5060-5919.engineering, programmable calculator

Slide rules were commonly used prior to the invention of the calculator. The Slide rule was used for performing multiplication, division and other scientific functions up through the 1960s and prior to the development of the electronic calculator. Used by Frank Smythe, engineer. Used up to the 1960's prior to the invention of the electronic calculator. Metal rule, hard cardboard case. The slide rule consists of two divided scales, one fixed and one movable, and a sliding window called a cursor. The Slide rule was used for performing multiplication, division and other scientific functions up through the 1960s and the development of the electronic calculator. System Darmstadt dmake, sun Hemm, Japan. "F. SMYTH" is annotated on the slide rule cover. slide rule, circa 1950 slide rule, trade measurements and calculations slide rule

Many Numbered Buttons, able to jump from 1 - 9 in any part Still Works Turner able handle for resetting the item Numbers go up to the trillonsBwroungs

The Slide Rule was made in 1940 and used by the Royal Australian Air Force during WW2.This is an original Slide Rule that was used by RAAF during WW2Wooden Slide Rule CalculatorRule, Slide M.G. Mk III. W.H.H. 1940slide rule ww2 raaf