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Telegraph Register - Siemens Bros, Embossing, post 1865 Object Reg. No: ST 021248

Summary:
Telegraph embossing register. For receiving and recording telegraph signals.

In operation, the intermittent current generated by the received signals causes the embossing stylus to be intermittently pressed on to a moving paper tape. The stylus embosses a series of long and short marks on the tape, with the length of each mark depending on whether the duration of the current flow is long (producing a dash) or short (producing a dot.) The mechanism which moves the tape is driven by a falling weight.

The object is marked: 'Patent / Siemens Brothers/ London / No. 8150'. The British subsidiary of Siemens & Halske, of Berlin, was set up as Siemens, Halske & Co. in 1858, and was re-named Siemens Brothers in 1865. Thus it seems likely that this object was manufactured in London in or after 1865.
Description:
Wooden base carrying brass baseplate at one end of which are two vertical wire coils forming electromagnets. The rest of the base is occupied by a brass case housing the mechanism by which paper tape is moved past a stylus at the end of a pivoted arm which moves in response to the electromagnets. When the stylus is brought into contact with the tape, a mark is embossed into the paper. The tape is supplied from a reel (missing) mounted above the register on a metal arm. The mechanism to move the tape is powered by a spring within the brass case which can be wound up using a key on a central square shaft.
Acquisition Information:
Donation from (Estate of) Mr James Smith, 1939
Discipline: Technology
Dimensions: 320 mm (Height), 155 mm (Width), 323 mm (Length)

More information

Tagged with: clockwork mechanisms, telegraphy
Themes this item is part of: The Australian telegraph network 1854-1877, Telegraphy Collection, Horology Collection, Information & Communication Collection
Primary Classification: COMMUNICATIONS
Secondary Classification: Telegraphy
Tertiary Classification: output
Inscriptions: Engraved on side of brass case:
'PATENT
SIEMENS BROTHERS
LONDON
No. 8150'
Manufacturer: Siemens Bros Dynamo Works Ltd, London, England, Great Britain

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