Instrument intended to be carried at the wrist
US4165477A · kind A · utility
10Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 1977 |
| Grant date | Aug 21, 1979 |
| Priority date | — |
| Expiry date | May 18, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/62
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wrist carried instrument includes a rechargeable electric energy source for providing power to the instrument. The energy source is recharged by a pair of generators, both operatively coupled to the source and generating complementary recharging currents from different physical phenomena. The first generator may be a photo-electric cell generating a recharging current in light such as exists from the sun in summer, while the second generator may be a thermoelectric element generating a recharging current from a temperature gradient such as exists in the dark or winter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.