Semi-automatic Telegraph Key
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Object Details
- Western Union Corporation
- 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 to quickly make and break contact in the electrical circuit. The operator still makes the dashes manually.
- Location
- Currently not on view
- Credit Line
- from Western Union Corporation
- ID Number
- EM.331994
- serial number
- 3223
- collector/donor number
- 72-23
- accession number
- 294351
- catalog number
- 331994
- Object Name
- bug
- semi-automatic key
- telegraph key
- Physical Description
- metal (overall material)
- plastic (overall material)
- cloth (overall material)
- Measurements
- overall: 3 3/8 in x 3 1/2 in x 8 in; 8.5725 cm x 8.89 cm x 20.32 cm
- See more items in
- Work and Industry: Electricity
- Telegraph Keys
- Communications
- National Museum of American History
- Record ID
- nmah_891140
- Metadata Usage (text)
- CC0
- GUID (Link to Original Record)
- http://n2t.net/ark:/65665/ng49ca746a7-1e63-704b-e053-15f76fa0b4fa
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