Semi-automatic Telegraph Key

Description (Brief)
Telegraph keys are electrical on-off switches used to send messages in Morse code. The Mecograph Company created a right-angle semi-automatic telegraph key around 1906. They competed with Horace Martin's Vibroplex Company until Martin purchased Mecograph in 1914. A semi-automatic key repeated the Morse code dots rapidly, much like holding down a key on a keyboard for repeated letters. The operator still keyed the dashes but could work much faster.
Location
Currently not on view
Object Name
bug
semi-automatic key
telegraph key
maker
Mecograph Company
Physical Description
metal (overall material)
plastic (overall material)
Measurements
overall: 2 1/4 in x 4 1/4 in x 5 7/8 in; 5.715 cm x 10.795 cm x 14.9225 cm
ID Number
EM*331682
model number
07728
collector/donor number
100-057
accession number
294351
catalog number
331682
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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