Walter's E.M. Co. telegraph relay
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
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from the Massachusetts Institute of Technology, Dept. of Electrical Engineering, thru John A. Tucker
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.322123
label: catalog number
content: 322123
label: accession number
content: 244197
objectType: label: Object Name
content: Ammeter
label: Object Name
content: telegraph relay
label: Other Terms
content: Ammeter; Measuring Devices
physicalDescription: label: Physical Description
content: wood (?? material)
label: Measurements
content: overall: 5 1/2 in x 5 in; 13.97 cm x 12.7 cm