Telegraph Key

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Description (Brief)
Telegraph keys are electrical on-off switches used to send messages in Morse code. The message travels as a series of electrical pulses through a wire. The operator pushes the key’s lever down briefly to make a short signal, a dot, or holds the lever down for a moment to make a slightly longer signal, a dash. The sequence of dots and dashes represent letters and numbers. This key has a switch on the side called a circuit-closer that takes the key off-line when not in use.
Location
Currently not on view
date made
ca 1880
maker
J. H. Bunnell & Co.
Physical Description
wood (overall material)
brass (overall material)
plastic (overall material)
Measurements
overall: 1 3/4 in x 2 1/4 in x 5 1/4 in; 4.445 cm x 5.715 cm x 13.335 cm
ID Number
EM.320515
catalog number
320515
accession number
241402
Credit Line
from International Business Machines, Inc., William J. Hammer Collection
See more items in
Work and Industry: Electricity
Communications
Telegraph Keys
Data Source
National Museum of American History, Kenneth E. Behring Center

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