single current telegraph relay
single current telegraph relay
Usage conditions apply
- Description
- Telegraph relays amplify an electrical signal in a telegraph line. Telegraph messages travel as a series of electrical pulses through a wire from a transmitter to a receiver. The pulses fade in strength as they travel through the wire, limiting the distance a message can be sent. Relays remedy that problem by detecting a weak signal and automatically re-transmitting that signal down the line using a local power source.
- Location
- Currently not on view
- Object Name
- single current relay
- relay
- telegraph relay
- Maker
- Western Union Corporation
- Measurements
- overall: 2 1/4 in x 8 1/2 in x 4 in; 5.715 cm x 21.59 cm x 10.16 cm
- ID Number
- EM.333235
- serial number
- 112
- collector/donor number
- 04-26
- accession number
- 294351
- catalog number
- 333235
- Credit Line
- from Western Union Corporation
- See more items in
- Work and Industry: Electricity
- Communications
- Data Source
- National Museum of American History
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