Skip to main content Smithsonian Institution

Catalog Data

Measurements:
overall: 3 1/2 in x 7 1/4 in x 3 7/8 in; 8.89 cm x 18.415 cm x 9.8425 cm
Object Name:
relay
relay
telegraph relay
Other Terms:
telegraph relay; Communications; Telegraphy; landline; 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
Credit Line:
from Western Union Corporation
ID Number:
EM.333363
Accession number:
294351
Catalog number:
333363
See more items in:
Work and Industry: Electricity
Communications
Data Source:
National Museum of American History
GUID:
http://n2t.net/ark:/65665/ng49ca746a5-5d27-704b-e053-15f76fa0b4fa
EDAN-URL:
edanmdm:nmah_712190