Rechargeable battery backup power source for an ionization smoke detector device
US4155081A · kind A · utility
12Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1977 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Oct 25, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/20
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A circuit for a rechargeable battery backup power source used with an ionization smoke detector device whereby upon the failure of the main alternating current power source, a battery which is normally charged from the power source during standby operation is connected to an ionization smoke detector circuit to maintain its energization upon the loss of the alternating current power source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.