single current telegraph relay


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.

Maker: Western Union Corporation

Location: Currently not on view

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


Exhibition Location:

Credit Line: from Western Union Corporation

Data Source: National Museum of American History

Id Number: EM.331053Accession Number: 294351Collector/Donor Number: 04-10Catalog Number: 331053

Object Name: relaysingle current relaytelegraph relay

Physical Description: metal (part: material)wood (part: material)Measurements: overall: 5 in x 4 1/2 in x 4 1/2 in; 12.7 cm x 11.43 cm x 11.43 cm


Record Id: nmah_890508

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