polar 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.331823Collector/Donor Number: 15-45Catalog Number: 331823Accession Number: 294351

Object Name: polar relayrelaytelegraph relay

Physical Description: metal (part: material)plastic (part: material)Measurements: overall: 3 3/4 in x 1 in x 1 1/2 in; 9.525 cm x 2.54 cm x 3.81 cm

Guid: http://n2t.net/ark:/65665/ng49ca746a7-1701-704b-e053-15f76fa0b4fa

Record Id: nmah_891030

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