Telegraph Sounder
name: label: maker
content: Manhattan Electric Supply Co.
notes: label: Description (Brief)
content: Telegraph sounders convert electrical pulses into audible sounds and are used to receive Morse code messages. The message travels as a series of electrical pulses through a wire. Short pulses make a dot, slightly longer pulses make a dash. The sequence of dots and dashes represent letters and numbers. The pulses energize the sounder’s electromagnets which move a lever-arm. The arm makes a loud “click” when it strikes a crossbar and the operator translates the pattern of sounds into the original language. Like several instruments donated by Western Union, this sounder bears a stamp "N.Y.R.S." and a date, "2 29" in this case. That stamp indicates that this sounder was sent to the company's New York Repair Shop and was serviced in February 1929.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
label: See more items in
content: Communications
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content: Telegraph Sounders
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.332362
label: collector/donor number
content: 06-16
label: accession number
content: 294351
label: catalog number
content: 332362
objectType: label: Object Name
content: telegraph receiver
label: Object Name
content: telegraph sounder
physicalDescription: label: Physical Description
content: wood (overall material)
label: Physical Description
content: brass (overall material)
label: Physical Description
content: rubber (overall material)
label: Measurements
content: overall: 3 1/2 in x 2 7/8 in x 5 1/2 in; 8.89 cm x 7.3025 cm x 13.97 cm