Telegraph Sounder and Resonator
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.
label: Location
content: Currently not on view
topic: label: web subject
content: Communication, telegraph
setName: label: See more items in
content: Work and Industry: Electricity
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.332778
label: catalog number
content: 332778
label: accession number
content: 294351
label: collector/donor number
content: 100-763
objectType: label: Object Name
content: telegraph receiver
label: Object Name
content: telegraph sounder
physicalDescription: label: Measurements
content: overall: 14 3/4 in x 13 in x 5 in; 37.465 cm x 33.02 cm x 12.7 cm
label: Measurements
content: overall: 6 15/16 in x 9 3/8 in x 6 7/8 in; 17.62125 cm x 23.8125 cm x 17.4625 cm