Nacometer Morse code practice machine
date: label: date made
content: ca 1920
notes: label: Description (Brief)
content: A portable practice set in a case used for teaching telegraph and wireless operators Morse code. Spring-operated motor with winding crank on right side. A punched-paper tape is pulled around a spindle. A spring-steel arm with a contact rides against the tape, making contact with the spindle when a hole passes by. That contact completes a circuit and activates a separate telegraph sounder allowing the student to write down the coded message. Three binding posts on top permit connection of a sounder and battery. A pivot arm can vary the speed of the device from "Fast" to "Slow." The unit stops when the arm is moved to the extreme left. Stamping inside lid reads: "The Nacrometer / Automatic Code Transmitter / made for / The National Radio Institute / Washington, DC. " Variable speed motor drive contained in unit.
label: Location
content: Currently not on view
place: label: associated place
content: United States: Maryland, Rockville
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from John R. Lehmann
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.0693.01
label: catalog number
content: 1986.0693.01
label: accession number
content: 1986.0693
objectType: label: Object Name
content: Transmitter
label: Object Name
content: radio transmitter
label: Object Name
content: code practice machine
label: Other Terms
content: Transmitter; Radio
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: leather (overall material)
label: Measurements
content: overall: 7 1/2 in x 15 1/4 in x 8 1/2 in; 19.05 cm x 38.735 cm x 21.59 cm