Semi-automatic Telegraph Key

Description (Brief):

Telegraph keys are electrical on-off switches used to send messages in Morse code. A semi-automatic telegraph key like this one allows an operator to send land-line and wireless (radio) telegraph messages at a much faster rate than with an ordinary key. The key automatically produces rapid morse code dots by using a weighted pendulum or springs to quickly make and break contact in the electrical circuit. The operator still makes the dashes manually.

Maker: Western Union Corporation

Location: Currently not on view

See more items in: Work and Industry: Electricity, Telegraph Keys, Communications


Exhibition Location:

Credit Line: from Western Union Corporation

Data Source: National Museum of American History

Id Number: EM.331683Accession Number: 294351Collector/Donor Number: 100-059Catalog Number: 331683

Object Name: bugsemi-automatic keysending keytelegraph key

Physical Description: metal (overall material)plastic (overall material)Measurements: overall: 2 1/2 in x 3 1/4 in x 7 1/2 in; 6.35 cm x 8.255 cm x 19.05 cm


Record Id: nmah_890918

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