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Telegraph Key - Chester, 1855-80 Reg. No: ST 043172

Summary:: "Camelback" telegraph key, so-called because of its distinctive curved shape. The key was used for the transmission of signals in the Morse electric telegraph system and was manufactured by Chester of New York.

A pivoted spring-loaded metal lever was depressed by the operator to complete an electric circuit and transmit current along the telegraph line. Releasing the lever broke the circuit and cut off the current. Letters and numbers were represented by a sequence of short and long current pulses, transmitted according to a defined code. The most widely used code was generally known as "Morse code".

At the receiving end the sequence of current pulses could be displayed as long and short marks on a paper tape, or could be interpreted by an operator listening to the sounds made by the receiving instrument.
Description:: Brass base with brass screw terminals. Curved brass pivoted lever, fitted with ivory knob.
Acquisition Information:: Donation from Mr John Thompson, 1915

Discipline:	Technology
Dimensions:	45 mm (Height), 87 mm (Width), 138 mm (Length)

Tagged with:	morse keys, telegraph equipment, telegraphy
Themes this item is part of:	Australia and the global telegraph network 1854-1902, The Australian telegraph network 1854-1877, Telegraphy Collection, Information & Communication Collection
Primary Classification:	COMMUNICATIONS
Secondary Classification:	Telegraphy
Tertiary Classification:	input
Inscriptions:	Side of base inscribed: "CHESTER NEW YORK 309"
Manufacturer:	Chester, New York, United States of America, pre 1914