Telegraph Register
date: label: date made
content: ca 1847
name: label: maker
content: Clark, William
notes: label: Description (Brief)
content: An incomplete telegraph register with automatic speed regulator. At the side of the machine is a toothed wheel attached to one of the rollers in the drive train and engaging a worm gear at the upper end of a revolving rod, to the lower end of which are attachments which formerly had two adjustable fans. The fans were made to open and close automatically and control the speed of the machine. William Clark of Philadelphia made this register as a test of his speed regulation design.
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 Mrs. Horatio King
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.298569
label: catalog number
content: 298569
label: accession number
content: 60786
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: brass (overall material)
label: Physical Description
content: copper (overall material)
label: Measurements
content: overall: 8 in x 7 in x 10 1/2 in; 20.32 cm x 17.78 cm x 26.67 cm