Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:castle
precision pendulum clock |
| gptkbp:accuracy |
about one second per year
|
| gptkbp:countryOfOrigin |
gptkb:United_Kingdom
|
| https://www.w3.org/2000/01/rdf-schema#label |
Shortt–Synchronome clock
|
| gptkbp:inventedBy |
1921
William Hamilton Shortt |
| gptkbp:manufacturer |
Synchronome Company
|
| gptkbp:mechanismOfAction |
free pendulum clock
|
| gptkbp:notableFeature |
electromagnetic impulse system
minimal mechanical interference with pendulum separate master and slave pendulums |
| gptkbp:notableInstitution |
gptkb:Royal_Observatory,_Greenwich
gptkb:United_States_Naval_Observatory gptkb:Paris_Observatory |
| gptkbp:operationalPeriod |
1920s–1950s
|
| gptkbp:replacedBy |
quartz clock
|
| gptkbp:totalProduced |
about 100
|
| gptkbp:usedBy |
observatories
radio time signal services |
| gptkbp:usedFor |
timekeeping
|
| gptkbp:bfsParent |
gptkb:Edward_Shortt
|
| gptkbp:bfsLayer |
8
|