Telegraph Register
date: label: date made
content: 1837
name: label: maker
content: Green, James
notes: label: Description (Brief)
content: This experimental telegraph register was made by James Green and was reportedly used by Rev. Henry Sheib of Baltimore and Samuel Morse on private line demonstrations in the late 1830s. After talking with Joseph Henry, Morse adopted u-shaped electromagnets like the one used on this object. The large wooden pulley supported a hanging weight that pulled the paper tape under the stylus.
label: Description (Brief)
content: Telegraph registers are electrically-activated printers that receive Morse code messages. The message travels as a series of electrical pulses through a wire. The pulses energize the register’s electromagnets which move a lever-arm holding a pen or stylus. A clockwork mechanism pulls a strip of paper across the pen or stylus, recording the message. Short pulses draw or emboss a dot, slightly longer pulses a dash. The sequence of dots and dashes represent letters and numbers.
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
label: See more items in
content: Telegraph Registers
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content: Communications
creditLine: label: Credit Line
content: from Rev. Henry Schieb
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.181670
label: catalog number
content: 181670
label: accession number
content: 32976
objectType: label: Object Name
content: telegraph receiver
label: Object Name
content: telegraph register
physicalDescription: label: Physical Description
content: wood (overall material)
label: Physical Description
content: steel (overall material)
label: Physical Description
content: copper (overall material)
label: Physical Description
content: fiber (overall material)
label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: 11 in x 8 in x 16 1/2 in; 27.94 cm x 20.32 cm x 41.91 cm