Semi-automatic Telegraph Key
Semi-automatic Telegraph Key
Usage conditions apply
- 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.
- Location
- Currently not on view
- Object Name
- bug
- semi-automatic key
- sending key
- telegraph key
- maker
- Western Union Corporation
- 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
- ID Number
- EM.331683
- accession number
- 294351
- collector/donor number
- 100-059
- catalog number
- 331683
- Credit Line
- from Western Union Corporation
- See more items in
- Work and Industry: Electricity
- Telegraph Keys
- Communications
- Data Source
- National Museum of American History
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