Analog timepiece movement
US5446703A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1994 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Dec 12, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04C3/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved movement for an analog wristwatch of the type having a plastic frame with a peripheral wall surrounding a central wall. The central wall carries gear trains on the dial side and movement side of the wall and a stepping motor driving the gear trains to drive the watch hands. An annular printed circuit board carries discrete electronic components disposed on one side and electrically connected thereto. The peripheral wall of the frame includes coplanar mounting surfaces arranged to support the PCB and has discrete recesses surrounding the central wall which receive the discrete electronic components when the annular PCB is so supported. An annular conductive spring plate disposed on the annular PCB performs various switching functions. The spring plate and the printed circuit board are held down against the coplanar mounting surfaces, and a thin, large diameter lithium energy cell fits inside the annular members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.