Gear train for analog display timepiece
US4308610A · kind A · utility
4Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1979 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Dec 3, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B33/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic or mechanical timepiece of the analog display type provided with a gear train for driving timekeeping hands. The gear train includes a center pipe affixed to an intermediate bridge secured to the base plate, a free cannon pinion being rotatably supported on the pipe and having a center wheel mounted thereon which is disposed in the space between the bridge and a section of the base plate, thereby providing a dependable support for the cannon pinion without the need for enlarging the diameter of the center wheel or of the drive pinion intermeshing therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.