Safety circuit for electronic flash apparatus
US4204140A · kind A · utility
5Cited by
11References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1979 |
| Grant date | May 20, 1980 |
| Priority date | — |
| Expiry date | Feb 12, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electronic flash unit has a safety circuit for removing stored electrical energy that is potentially hazardous to a flash unit user. A switch, responsive to opening of the flash unit housing, is closed to energize a quench circuit, which is parallel to a chargeable flash firing capacitor. The firing capacitor discharges through the quench circuit, thereby lowering the stored electrical energy to a level that is not hazardous to an operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.