Energy system for electronic watch
US4320477A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1980 |
| Grant date | Mar 16, 1982 |
| Priority date | — |
| Expiry date | Nov 10, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An energy system for powering an electronic watch having a digital or analog time display, the system comprising a primary power source, such as a thermoelectric generator or solar cell, whose output is fed to an energy converter to produce an operating voltage for the electronic circuits and time display of the watch. The system further includes a buffer accumulator that is charged by the energy converter and acts to maintain the operation voltage when the primary source is inactive, thereby providing an uninterrupted supply of operating voltage. The watch also includes a status indicator which senses the prevailing condition of the energy system to produce a signal indicative thereof perceptible to the user of the watch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.