Quartz Clock
date: label: date made
content: 1936
notes: label: Description
content: This clock was built at the U. S. Naval Observatory about 1936 as part of an experimental program to control time signals transmitted by radio. It is a quartz clock, that is, it depends on a specially cut piece of quartz crystal to keep time. The search for a better timekeeper than the best pendulum clocks led to the development of quartz-crystal clocks, the first of which telecommunications engineers at Bell Telephone Laboratories built in 1927 to monitor and control frequencies.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Mechanisms
label: See more items in
content: Military
label: See more items in
content: Time and Navigation
label: See more items in
content: Measuring & Mapping
creditLine: label: Credit Line
content: Transfer from U.S. Naval Observatory
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: ME.319994
label: catalog number
content: 319994
label: accession number
content: 240411
objectType: label: Object Name
content: clock
label: Object Name
content: clock, quartz
label: Other Terms
content: clock; Electronic (Quartz); Free-Standing Clock
physicalDescription: label: Physical Description
content: metal (amplifying apparatus material)
label: Physical Description
content: metal (time indicating mechanism material)
label: Measurements
content: overall: 44 1/2 in x 20 in x 17 1/2 in; 113.03 cm x 50.8 cm x 44.45 cm