Telegraph Sounder and Relay
name: label: maker
content: Watts and Company
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 the Telegraphic Historical Society
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.181375
label: catalog number
content: 181375
label: accession number
content: 31175
objectType: label: Object Name
content: telegraph relay
label: Object Name
content: telegraph receiver
label: Object Name
content: telegraph sounder
label: Other Terms
content: telegraph sounder; Telegraphy
physicalDescription: label: Measurements
content: overall: 5 in x 8 1/2 in x 5 1/2 in; 12.7 cm x 21.59 cm x 13.97 cm