Weston model 30 moving coil relay
name: label: maker
content: Weston Electrical Instrument Co.
label: Maker
content: Western Union Corporation
notes: label: Description
content: 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.
label: Location
content: Currently not on view
topic: label: general subject association
content: electricity
setName: label: See more items in
content: Work and Industry: Electricity
label: See more items in
content: Communications
creditLine: label: Credit Line
content: from Western Union Corporation
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.333365
label: accession number
content: 294351
label: collector/donor number
content: 13-80
label: catalog number
content: 333365
objectType: label: Object Name
content: moving coil relay
label: Object Name
content: relay
label: Object Name
content: telegraph relay
physicalDescription: label: Measurements
content: overall: 3 3/8 in x 4 in x 8 1/4 in; 8.5725 cm x 10.16 cm x 20.955 cm