Clock mechanism and display face
US4885729A · kind A · utility
Inventor
Key dates
| Filing date | Aug 4, 1988 |
| Grant date | Dec 5, 1989 |
| Priority date | — |
| Expiry date | Aug 4, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B45/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Clock mechanism and display face (10) having a quartz reverse movement electrical drive motor (24) with a pair of coaxial drive shafts (26, 28). The motor (24) is mounted on a supporting frame (12) and turns coaxially spaced apart drive gears (34, 41) for the hour and minute displays. The drive gears (34, 41) in turn mesh with and rotate driven gears (50, 52) and (60, 62) spaced either ninety degrees or one-hundred-eighty degrees from each other at their engagement points with their respective drive gears. Hour and minute display hands (100, 110) are mounted on posts on the driven gears which are located at the same point thereon. As the gears turn the intersection (109, 119) of the wires or the point (122, 124) of the ninety degree spacing describe a circle. The instersections or points overlay a dial face to indicate the time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.