fire alarm telegraph relay

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

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

Exhibition:

Exhibition Location:

Data Source: National Museum of American History

Id Number: ZZ.RSN79812U32

Object Name: relaytelegraph relay

Measurements: overall: 3 in x 6 in x 3 1/2 in; 7.62 cm x 15.24 cm x 8.89 cm

Guid: http://n2t.net/ark:/65665/ng49ca746a5-4170-704b-e053-15f76fa0b4fa

Record Id: nmah_700677

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