Timer controlled fire and burglar alarm system
US4785289A · kind A · utility
51Cited by
1References
1Claims
0Family size
Inventor
Key dates
| Filing date | Apr 13, 1987 |
| Grant date | Nov 15, 1988 |
| Priority date | — |
| Expiry date | Apr 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B19/005
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A timer controlled fire and burglar alarm system using an economical circuit design and battery for prolonged and effective functioning and includes a thermo-electric infrared sensor, a filter and an amplifier to detect signal, a plurality of time priority circuits, a time-delay circuit, a timer controlled alarm setting circuit and timers with time display for setting and disarming of an alert condition and/or driving peripheral devices so as to function as a fire alarm, a burglar alarm and a visitor detection system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.