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Brown drum-type cable relay

Brown drum-type cable relay

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Description
Telegraph relays amplified electrical signals in a telegraph line. Telegraph messages traveled as a series of electrical pulses through a wire from a transmitter to a receiver. Short pulses made a dot, slightly longer pulses a dash. The pulses faded in strength as they traveled through the wire, to the point where the incoming signal was too weak to directly operate a receiving sounder or register. A relay detected a weak signal and used a battery to strengthen the signal so that the receiver would operate.
Location
Currently not on view
Object Name
relay
submarine telegraph component
submarine telegraph relay
telegraph relay
date made
ca 1900
maker
S. G. Brown, Ltd.
Measurements
overall: 18 1/2 in x 16 1/2 in x 19 1/4 in; 46.99 cm x 41.91 cm x 48.895 cm
ID Number
EM.294351.026
accession number
294351
catalog number
294351.026
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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