Partrick & Carter "Marean" telegraph repeater


Telegraph repeaters 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, limiting the distance a message could travel. Repeaters remedied that problem by detecting a weak signal and using a local power source to re-energize and re-transmit the signal down the line.

This ornate repeater was designed by Morell Marean, manager of the Western Union Office in Washington, DC. The unit was made by the Philadelphia firm of Partrick & Carter around 1880.

Date Made: ca 1880

Maker: Partrick, Carter & Co.

Location: Currently not on view

See more items in: Work and Industry: Electricity, Communications, Telegraph Relays & Repeaters


Exhibition Location:

Credit Line: Transfer from the US Weather Bureau

Data Source: National Museum of American History

Id Number: EM.232581.01Catalog Number: 232581.01Accession Number: 43626

Object Name: telegraph repeatertelegraph relay

Physical Description: wood (overall material)cast iron (overall material)zinc (overall material)rubber (overall material)brass (overall material)Measurements: overall: 5 1/4 in x 8 in x 4 1/4 in; 13.335 cm x 20.32 cm x 10.795 cm


Record Id: nmah_700562

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