Telegraph Key
notes: label: Description (Brief)
content: Telegraph keys are electrical on-off switches used to send messages in Morse code. The message travels as a series of electrical pulses through a wire. The operator moves this key’s lever from side to side to make signals. Called a simplex-duplex key, this key can send messages either on one-way circuits (simplex) or on circuits designed to send messages on lines designed to carry two messages at once (duplex.)
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
label: See more items in
content: Telegraph Keys
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.331410
label: maker number
content: 2
label: collector/donor number
content: 14-03A
label: accession number
content: 294351
label: catalog number
content: 331410
objectType: label: Object Name
content: key
label: Object Name
content: telegraph key
physicalDescription: label: Physical Description
content: brass (overall material)
label: Physical Description
content: metal (overall material)
label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 2 in x 3 1/2 in x 7 in; 5.08 cm x 8.89 cm x 17.78 cm