Electronic photoflash
US4130780A · kind A · utility
13Cited by
3References
16Claims
0Family size
Inventors
Key dates
| Filing date | Nov 1, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | Nov 1, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/3385
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery operated, capacitor discharge type electronic, photoflash system having an electro-mechanical switching means for automatically disconnecting the battery to minimize unnecessary discharge of the battery. The system causes the battery to be disconnected at a predetermined time interval after a charge cycle has been started for a discharged main capacitor or after the main capacitor has been fully charged for a predetermined period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.