Electronic flash with safety switch feature
US4369395A · kind A · utility
7Cited by
10References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1981 |
| Grant date | Jan 18, 1983 |
| Priority date | — |
| Expiry date | Mar 5, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A safety switch arrangement is provided for an electronic flash for automatically discharging the main storage capacitor in response to the user deliberately or inadvertently removing the cover from the flash housing. The electronic flash is of any ordinary type comprising a DC-to-DC converter with a step-up transformer and the safety switch arrangement is connected to discharge the main storage capacitor through the secondary winding of the DC-to-DC converter transformer thereby eliminating the need for a separate bleeder resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.