This item was probably acquired for, and used by, participants in telegraphy at the Ballarat School of Mines courses between 1873 and 1893.An electromagnetic relay device on a brass base plate, and mounted onto a wood base. It is covered by a removable wood-framed glass sided cage. The item has four terminal posts and an adjustable conductor mechanism.ballarat school of mines, telegraphy, relay device, telegraph coding

Book. Colonial Telegraph Code. Thomas & William Smith LTD.ST Lawrence Ropery, NEWCASTLE-UPON-TYNE.book, magazine, thomas & william smith

This Agers Telegraphic Primer or skeleton telegram guide contains a list of 19000 words which could be used by a business firm to send telegrams overseas in code form. The book once belonged to the Warrnambool firm Cramond and Dickson on the corner of Liebig and Timor Streets which opened a branch of their drapery business in London in 1868. By an agreement with the Reuters Telegram Company in 1899, the code word “sferalcea “ was used for the transmission of telegrams between the two shops. Messages of a general kind were set out at the back of the book: eg: the code word septicity stood for the message, “answer must be here not later than today twelve noon.” The selected words which were used by Cramond and Dickson’s have hand written entries beside the code word. These code books were used to save money and also to improve security.This book has significance on a number of levels. It has local historical significance, is well provenanced. It belonged to one of Warrnambool’s earliest and longest running businesses. The book itself, belonged to the era of early telegraphic communication and as such has wider historical significance.Black soft leather cover with gold lettering, pink inside front and back covers. 312 pages. Up to page 200 the book has words with spaces beside each word to make entries. The back section contains lists of words. Some loose pages and notes contained within the book. Typed page inside front cover from Reuters Telegram Company Limited. Ager’s Telegraphic Primer or skeleton telegram code: consisting of 19000 good telegraphic English words with appendix. Purple stamp inside front cover: Dr Ager 1 Foulden Road Stoke Newingtonwarrnambool, warrnambool history, cramond & dickson, agers telegraphic primer, agers telegraphic primer, reuters telegram company

The Morse telegraph system had its beginnings in 1836 when Samuel Morse, Alfred Vail and Joseph Henry developed an early model of the system. There are a number of variations on the machine but the operating system is very similar in all and the language is a standardised international code which has been in operation since the 1860's. Morse code consists of five elements, dots, dashes, and gaps of one , three and seven units in length. It is still in use to this day and has been applied to other systems of communication such as amateur radio, mobile phones and communication systems for disabled people. This particular telegraph key possibly has post office or naval origins.Morse code was an important invention in world communication systems and this machine therefore has important social and research significance. It is useful as an interpretive item.This instrument sits on a black rectangular base of black bakelite. The mechanism ids held in place by three larger metal screws and two smaller ones on the upright section from the base.The movable part is metal with the attached handle a similar black material as the base.ADMY.PATT No 7681 KEY MORSE SERN PL 23780 Rocker Front contact. Lift @ turn on one of the screws on the bar.history of warrnambool, rocker telegraph, telegraph key, morse code

This is a Morse Code key. Morse Code is a method of transmitting text information using short and long signals (‘dots and dashes’). It is named after Samuel Morse, the inventor of the telegraph and was developed in the 1860s. It was used extensively in the 1890s for early radio communication before it was possible to transmit voice and continued to be used in the 20th century along with voice transmission , especially by amateur radio persons. It was also used in military and naval communication but not so much today. It is believed that this Morse Code key belonged to Ted Salamy, a jeweller and the first person in Warrnambool to hold an amateur radio licence (1924 Call Sign A3AJ, the 35th licence issued in Victoria).This Morse Code key is of interest as an object more used in the past, especially by amateur radio persons. It is believed to have been the property of Ted Salamy, the first person in Warrnambool to hold an amateur radio licence. This is a metal Morse Code key with an oval metal base. It has three screws inserted in the base and two more screws attached to the sides of the base. There is a key lever on top of the base and this is adjustable. The hinge on which the key lever sits is missing. The lever has a round black knob at one end. ‘Made in U.S.A. H15.682’ Wm.M. Nye Co Inc. Bellevue W.A.’ morse code key, ted salamy,, history of warrnambool

Khaki coloured soft cover with black print. At the bottom is a symbol of His Majesty's Stationery Office, London. 123 pages plus annexes. Illustrated advertising. Text regarding signals, morse code & message procedures.books-manuals/reference/military/signals, wireless

The telegraph system of sending and receiving messages was developed in the early 1800s and improved as time went on. It sends electronic signals that represent letters and words along a wire. Those signals are then converted back to words at the other end of the wire. Morse code is a similar system. A fee is charged to send a telegraph, per letter or per word. The telegraph greatly improved communication, particularly in a large country like Australia. It was a fast way to send news and send out calls for help for people during a shipwreck. In Warrnambool, it was even used to set the correct time every day; a signal was sent from the time ball in Melbourne, and along the railway line to the Warrnambool Post Office. This 1896 telegraph tells a big story in very few words, only fourteen! The layout of the paper form includes a table with four columns and five rows, set out for writing just one word into each of the twenty spaces. The happy message is the approval to go ahead with the exchange/sale of the title from landowner Rutledge to Wilson. The Melbourne Legal firm Klingender Dickson and Kiddle sent this message on behalf of its client to the Bank of Australasia in Warrnambool. The Bank of Australasia was incorporated by the Royal Charter of England in March 1834. The bank began in Australia on 14th December 1835, opening in Sydney. The Acting Superintendent of the bank at that time was David Charters McArthur. He was Superintendent from 1867-to 1876. The Melbourne branch opened on 28th August 1838 in a two-roomed brick cottage on the north side of Little Collins Street, where two huge mastiff dogs were used at night to guard the bank. The government also provided an armed military sentinel. Due to the bank's rapid growth, a new building for the Melbourne branch was opened in 1840 at 75 Collins Street West. By 1879 the bank had been upgraded to a magnificent two-storey building on the corners of Collins and Queens Streets, with the entry on Collins Street. In 1951 the Bank of Australasia amalgamated with the Union Bank to form Australia and New Zealand Bank, now known as the ANZ. Then in 1970, the ANZ merged with both the ES&A and the London Bank of Australia to form the ANZ Banking Group Limited. The ANZ Banking Group Ltd kindly donated a variety of historic items from the Bank of Australasia. BANK of AUSTRALASIA, WARRNAMBOOL – In 1854 Warrnambool had two banks, the Union Bank and the Bank of Australasia. Later, completely different bank businesses opened; in 1867 the National Bank of Australasia, then in 1875 the Colonial Bank of Australasia. The original Warrnambool branch of the Bank of Australasia was established in July 1854, and operated from a leased cottage on Merri Street, close to Liebig Street. The bank later bought a stone building previously erected by drapers Cramond & Dickson on the corner of Timor and Gibson Streets. Samuel Hannaford was a teller and then Manager at the Warrnambool branch from 1855 to 1856 and the Warrnambool Council chose that bank for its dealings during 1856-57. In 1859 Roberts & Co. was awarded the contract to build the new Bank of Australasia branch for the sum of £3,000. The land was on a sand hill on the northeast corner of Timor and Kepler Streets and had been bought in 1855 from investor James Cust. The new building opened on May 21, 1860. The bank continued to operate there until 1951 when it merged with the Union Bank to form the ANZ Bank, which continued operating from its Liebig Street building. Warrnambool City Council purchased the former Bank of Australasia building in 1971 and renovated it, then on 3rd December 1973 it was officially opened as the Art Gallery by Cr. Harold Stephenson and Gallery Director John Welsh. The Gallery transferred to the purpose-built building in Liebig Street in 1986 and the old bank building is now the Gallery club. Staff at the Bank of Australasia in Warrnambool included the following men but others were also involved: Samuel Hannaford, Teller then Manager from 1855-1856; W H Palmer, Manager from January 1857 until November 1869 when the Teller Basil Spence was promoted to Manager; H B Chomley, Manager from April 1873 and still there in 1886; A Butt, Manager in 1895-1904; J R McCleary Accountant and Acting Manager for 12 months, until 1900; A Kirk, Manager 1904; J Moore, staff until his transfer to Bendigo in December 1908; J S Bath was Manager until 1915; C C Cox, Manager until April 1923; Richard C Stanley, Manager 1923 to April 1928. This telegraph has historical significance as it was sent to the Bank of Australasia in Warrnambool. The parties involved in the message, Rutledge and Wilson, were involved in a land deal in 1896 when the district was importing and exporting goods into and out of Warrnambool Harbour via sailing ships. It is also a historical record of the nature of financial agreements between similar institutions in Warrnambool and the district. The telegraph is significant for its association with the Bank of Australasia in Warrnambool, the first bank in Warrnambool, established in 1854. The bank continued to operate until its merger in 1951 when it became the ANZ Bank, which is still in operation today. The Bank was an integral part of the establishment and growth of commerce in Colonial Warrnambool and throughout Australia.Telegraph RECEIVED: Warrnambool Post Office, Wednesday 3rd June 1896. FROM: Klingender, Dickson, and Kiddle, solicitors, Bank Place, Melbourne FOR :the Manager, Bank of Australasia, Warrnambool, REGARDING: Rutledge to Wilson titleSTAMP: text inside circle "WARRNAMBOOL VIC", and in centre of the circle "JE 3 96" Telegraph No. "23", FROM :"Melbourne", FOR: "The Mgr, Bank of Australasia" MESSAGE (14 words): "Rutledge to Wilson title accepted by Purchaser's Solicitors settlement may be effected with auctioneers" TIME: "9:24" SIGNED: " Klingender Dickson Kiddle, Solrs, Bank Place"flagstaff hill, warrnambool, flagstaff hill maritime museum, maritime museum, commerce, banking, bank of australasia, australia & new zealand bank, anz bank, david charters mcarthur, telegraph, 1896, rutledge, wilson, klengender, dickson, kiddle, warrnambool post office, klengender dickson and kiddle, bank place

Stawell Post Office on corner of Wimmera and Main Streets. Erected 1875. Telegraph pole and streetlamp in foreground. Akins store visible at right of photo. The building has 3 arched doors & 6 arched windows on the ground floor and 8 square windows on the top story. Two chimneys on the roof and a wrought iron square fence on the roof. The outside of the building has not changed while the interior has been remodelled several times. The early Postmasters and their families lived upstairs. The main room originally included the Telegraph office where operators worked at machines, sending and receiving Morse code messages. Later alterations were made for a telephone switchboard room downstairs, with trunk line equipment upstairs. In 1965 the telephone system was converted to automatic.Black & white photo of a two story building on the corner of Wimmera & Main St. The building the Stawell Post and Telegraph Office. Out the front of the Post office is a telegraph pole and a light post. Next door in Main St is a single story building with a sign over the building Argus Australasian, underneath Akins, Age/Leader possible a newsagent. stawell

equipment/gear, ballarat rsl, ballarat

equipment/gear, ballarat rsl, ballarat

A telegraph key or Morse key is a specialised electrical switch used by a trained operator to transmit text messages in Morse code in a telegraphy system. Keys are used in all forms of electrical telegraph systems, including landline (also called wire) telegraphy and radio (also called wireless) telegraphy. An operator uses the telegraph key to send electrical pulses of two different lengths: short pulses, called dots or dits, and longer pulses, called dashes or dahs. These pulses encode the letters and other characters that spell out the message.Metal device with black knob mounted on a wooden base. A plaque with printed text is also attached to the base.Printed: GIVE A SERIES OF DASHES INSTEAD / OF A STEADY EXPOSURE WHEN CALL- / ING FOR LIGHT, OR SHOWING LIGHT. / USE THE PLUG IN No. 1 / SOCKET AS LONG AS THE / LIGHT IS GOOD ENOUGH. / THEN CHANGE TO No. 2 THIS WILL / LENGTHEN THE LIFE OF BOTH BULB / AND BATTERY.morse code, communication, telegraph key, messages, pulses

This tape is from the first telegram ever sent in Western Australia. This important event occurred on 21 June 1869. At this time the transmitted message was received on paper tape and later transcribed onto a telegram form for delivery. The original tape was presented to the Honourable Frederick Palgrave Barlee, Colonial Secretary of Western Australia, as a souvenir. "FPB" appears on an engraved shield on the lid. James Coats Fleming, the first telegraphist and later Superintendent of Telegraphs, sent the telegram. During 1875, Colonial Secretary Barlee transferred from Perth to Belize and then to Trinidad where he died in 1884. The fate of the case and spool, souvenir of that first telegram, was unknown. In July 1940, the WA Agent-General in London advised the Premier's Department in Western Australia that a Mrs EW Hillyer of Hertfordshire had the spool and case and was willing to sell it for ten guineas ($21). The Postmaster General's Department agree to the purchase and it duly arrived by registered mail. As a communications museum was planned in Melbourne, it was sent there to be included in the collection. Nothing more was heard until early 1980s when the relic arrived at the Post and Telecommunication museum in Perth. The case had been found in an old Melbourne strongroom where it had apparently been placed for safe-keeping and then forgotten. Initial attempts to decode the message on the tape were unsuccessful. Eventually, it was discovered that the Western Australian Telegraph Company, responsible for that first transmission, had devised its own code. A copy was obtained from the Battye Library and the message deciphered.This Morse tape is of historic significance as the first telegram ever sent in Western Australia. The occasion was momentous as the transition point between isolation and ease of connection for business and personal communications. The case is of aesthetic interest for the craftsmanship involved in the engraved text. Further, the tape has research potential owing to the unique information contained within this tape; that is, the code of the Western Australian Telegraph Company. This tape, may in turn be used to decode further messages sent by the Western Australian Telegraph Company. As the first telegraph message sent in Western Australia, this tape is rare. Despite a tumultuous journey from 1869 to the early 1980s, the tape's ceremonial wooden case provides provenance information which supports the tape's historic importance.Small wooden case (.1) holding a length of morse tape (.2) which was the first telegram ever sent in Western Australia . Wound onto a mother of pearl reel (.3). Accompanying signs and decoded message (.4,.5)..1 engraved on a metal shield shaped plaque on the lid: "WESTERN AUSTRALIAN / TELEGRAPHS / FPB" Inside: 'TRANSLATION OF REGISTER / TO THE CHAIRMAN OF FREMANTLE TOWN TRUST / His Excellency Colonel Bruce heartily congratulates the / inhabitants of Fremantle on this annihilation of distance / between the Port and the Capital, and he requests that this, / the first message, may be made publicly known. / GOVERNMENT HOUSE, / PERTH, June 21, 1869 / Transmitted 11 am / J.C.F."|.2: "Instrument Register / of the First / Telegraphic Message / in / Western Australia"|.3: "The first Telegraph Pole / in / WESTERN AUSTRALIA / was erected by / The Hon. Frederick P. Barlee / Colonial Secretary / on 19th Febr. 1869"telegram, commemorative item, morse inker, morse tape, morse code, code, postmaster-general's department

A telegraph or Morse key, sends a series of electrical signals down a telegraph line or via radio frequencies; the signals are interpreted as Morse code, a binary form of language constructed of 'dots and dashes', combinations of which correspond to letters of the alphabet. The motion of the key acts to complete an electrical circuit between the sender and receiver, producing a short pulse 'dot' or longer 'dash,' the space between the code indicates a broken current or wave.Device used to transmit telegraphic messages in Morse code through the manipulation of electric signals. The metal 'key' sits in a central bracket on which it moves up and down aided by a spring, controlled by an operator pushing the black Bakelite knob on the protruding end of the device. The motion presses the key onto a circular metal disc, completing the circuit and sending an electrical pulse to the receiver. The apparatus is secured to a wooden base with wires attached to the terminals; a cut out section of the base suggests wires may have entered through this area, attaching to a battery.Printed ink on base: "PMG"telegraph, telegraphist, morse code, mechanisation

Electrical telegraphs were point to point text messaging systems primarily used from the 1840's until the late 20th century. It was the first electrical telecommunications system and were sent by an operator or telegrapher using Morse code. Social telegrams were also encouraged and special pictorial forms and envelopes were designed such as the special purple form and envelope which was used when conveying condolence details during World War 2.(fn. Powerhouse https://collection.powerhouse.com.au/object/163103). There was a brief resurgence in telegraphy during World War I but the decline continued as the world entered the Great Depression years of the 1930s.  Although telegraph lines continued to play an important part in distributing news feeds from news agencies post World War 2, the rise of the internet in the 1990s and the widespread installation of the telephones in homes saw the need for telegrams to greatly decline. When the Commonwealth Post and Telegraph Act was passed in June 1902, and a national Postmaster General's Department (the PMG) was established the responsibility for the nation's mail and telephone services fell on Post Offices. The Bendigo Post Office, built in 1887 and situated on Pall Mall was the central distribution centre for receiving and delivering telegrams and continued to deliver communication and postal services until 1997. Now a Visitor Centre, dedicated volunteers at the Post Office continued to demonstrate and educate the public about telegraphic services and the development of this unique form of communication up until 2019 when Covid 19 disrupted every day life, coupled with the death Ted Rankins (the last Post Master and a long term telegraph volunteer at the Post Office). This satchel was used by Junior Postal Workers in Bendigo to carry telegrams which were delivered by bicycle in the early years and is part of the postal collection donated by the Rankins family in memory of Ted. Small, dark coloured rectangle, leather satchel with attached belt and ornate buckle. Satchel is made of four pieces of leather: two side pieces, one piece which is folded to create the front, bottom, back and flap and one piece for the central strap. The central strap has a single hole through which a metal toggle is inserted to secure the flap closed. Stitching is evident around the side seams, around the metal toggle and inside flap where strap is attached and has been reinforced. Satchel has four metal tabs to secure the top front to the top sides and an internal pocket on inside. The leather belt is attached to the back outside of the satchel with four metal press studs. The left side buckle also has reinforced stitching. Both sides of the buckle have decorative elements with the words Post Office / Communications/ Australia on the left side around outer circular edge. Underside of right side of buckle end has the words AROS pressed into it. Inside flap of satchel; Australia / Post / Telegram / Boys written in marker. Buckle; Post Office / Communications / Australia. Underside of right side of buckle end; AROS Internal; Gold address sticker with Ted Rankins contact details.ted rankins collection, bendigo post office, bendigo tourism, city of greater bendigo tourism, post office collection

Electrical telegraphs were point to point text messaging systems primarily used from the 1840's until the late 20th century. It was the first electrical telecommunications system and were sent by an operator or telegrapher using Morse code. Social telegrams were also encouraged and special pictorial forms and envelopes were designed such as the special purple form and envelope which was used when conveying condolence details during World War 2.(fn. Powerhouse https://collection.powerhouse.com.au/object/163103). There was a brief resurgence in telegraphy during World War I but the decline continued as the world entered the Great Depression years of the 1930s.  Although telegraph lines continued to play an important part in distributing news feeds from news agencies post World War 2, the rise of the internet in the 1990s and the widespread installation of the telephones in homes saw the need for telegrams to greatly decline. When the Commonwealth Post and Telegraph Act was passed in June 1902, and a national Postmaster General's Department (the PMG) was established the responsibility for the nation's mail and telephone services fell on Post Offices. The Bendigo Post Office, built in 1887 and situated on Pall Mall was the central distribution centre for receiving and delivering telegrams and continued to deliver communication and postal services until 1997. Now a Visitor Centre, dedicated volunteers at the Post Office continued to demonstrate and educate the public about telegraphic services and the development of this unique form of communication up until 2019 when Covid 19 disrupted every day life, coupled with the death Ted Rankins (the last Post Master and a long term telegraph volunteer at the Post Office). This satchel was used by Junior Postal Workers in Bendigo to carry telegrams which were delivered by bicycle in the early years. Small, rectangle, leather satchel with attached shoulder strap and buckle. Satchel is made of five pieces of leather: two side pieces, one piece which is folded to create the front, bottom, back and flap and two small pieces to hold strap ring. The flap has a single hole through which a metal toggle is inserted to secure the flap closed. Satchel has four metal tabs to secure the top front to the top sides and an internal pocket on inside. The leather strap is attached to the top of the side seams of the satchel with circular metal rings and two metal press studs. Inside flap: Sticker with '540B'bendigo post office, bendigo tourism, city of greater bendigo tourism, making a nation exhibition, post office collection

Electrical telegraphs were point to point text messaging systems primarily used from the 1840's until the late 20th century. It was the first electrical telecommunications system and were sent by an operator or telegrapher using Morse code. Social telegrams were also encouraged and special pictorial forms and envelopes were designed such as the special purple form and envelope which was used when conveying condolence details during World War 2.(fn. Powerhouse https://collection.powerhouse.com.au/object/163103). There was a brief resurgence in telegraphy during World War I but the decline continued as the world entered the Great Depression years of the 1930s.  Although telegraph lines continued to play an important part in distributing news feeds from news agencies post World War 2, the rise of the internet in the 1990s and the widespread installation of the telephones in homes saw the need for telegrams to greatly decline. When the Commonwealth Post and Telegraph Act was passed in June 1902, and a national Postmaster General's Department (the PMG) was established the responsibility for the nation's mail and telephone services fell on Post Offices. The Bendigo Post Office, built in 1887 and situated on Pall Mall was the central distribution centre for receiving and delivering telegrams and continued to deliver communication and postal services until 1997. Now a Visitor Centre, dedicated volunteers at the Post Office continued to demonstrate and educate the public about telegraphic services and the development of this unique form of communication up until 2019 when Covid 19 disrupted every day life, coupled with the death Ted Rankins (the last Post Master and a long term telegraph volunteer at the Post Office). This book was issued to Junior Postal Workers in Bendigo to guide them in the delivery of telegrams and designed to fit into their delivery satchels and carried while on the job. In the early years telegrams were delivered by bicycle and this manual is part of the postal collection donated by the Rankins family in memory of Ted. Small, blue, vinyl covered manual. Contains thirty printed pages covering all aspects of how to correctly deliver telegrams. Topics include 'Loss of telegram', 'Undelivered Telegram', 'special Delivery' and 'Beware of Dogs'. Bound with two ring metal clip. Front cover; Australian Post Office / Telecommunications Division / Telegram / Delivery / Instructions / Headquarters / 1962 Various annotations and updates throughout. ted rankins collection, bendigo post office, bendigo tourism, city of greater bendigo tourism, post office collection

Electrical telegraphs were point to point text messaging systems primarily used from the 1840's until the late 20th century. It was the first electrical telecommunications system and were sent by an operator or telegrapher using Morse code. Social telegrams were also encouraged and special pictorial forms and envelopes were designed such as the special purple form and envelope which was used when conveying condolence details during World War 2.(fn. Powerhouse https://collection.powerhouse.com.au/object/163103). There was a brief resurgence in telegraphy during World War I but the decline continued as the world entered the Great Depression years of the 1930s.  Although telegraph lines continued to play an important part in distributing news feeds from news agencies post World War 2, the rise of the internet in the 1990s and the widespread installation of the telephones in homes saw the need for telegrams to greatly decline. When the Commonwealth Post and Telegraph Act was passed in June 1902, and a national Postmaster General's Department (the PMG) was established the responsibility for the nation's mail and telephone services fell on Post Offices. The Bendigo Post Office, built in 1887 and situated on Pall Mall was the central distribution centre for receiving and delivering telegrams and continued to deliver communication and postal services until 1997. Now a Visitor Centre, dedicated volunteers at the Post Office continued to demonstrate and educate the public about telegraphic services and the development of this unique form of communication up until 2019 when Covid 19 disrupted every day life, coupled with the death Ted Rankins (the last Post Master and a long term telegraph volunteer at the Post Office). This belt buckle was used on the leather satchels used by Junior Postal Workers in Bendigo to carry telegrams which were delivered by bicycle in the early years. The buckle is part of the postal collection donated by the Rankins family in memory of Ted Rankins.Circular belt buckle from telegram delivery satchel belt. Inner buckle depicts the Greek deity Hermes who personifies the transmission of information and was adopted as an allegorical representation of the function of postal services. Outer buckle; Post Office / Communications / Australia. Centre top outer buckle; emu, kangaroo and shield Inner buckle; Hermes (left facing)bendigo post office, bendigo tourism, city of greater bendigo tourism, post office collection, ted rankins collection

The ceramic insulators were used by the PMG to insulate telephone lines connecting to the lightstation accommodation. The installation of a single galvanised wire telegraph line in 1873 provided the lightstation with a vital link to the outside world via Morse code. In 1875, the Australasian Sketcher reported on the new facility, writing that ‘the lighthouse on the extreme point of the promontory is connected with Melbourne by a line of telegraph, and as a large number of vessels pass in sight of the lighthouse, useful information is gained respecting their movements’.The system was immobilised in 1885 when a thunderstorm caused some of the poles to explode and connection wires to fuse and turn into molten metal. During WWII the lighthouse line was upgraded to four copper wires, and in 1971 a radio link replaced the line. The lines required constant maintenance. Some poles remain along the length of the promontory’s Telegraph Track as reminders of this former communication link. Insulators can also be found in the collections at Cape Schanck; Cape Otway and Gabo Island. Comprises a white ceramic insulator attached to a rectangular metal plate.