Automatic bypass switch for household security system
US4517556A · kind A · utility
3Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1982 |
| Grant date | May 14, 1985 |
| Priority date | — |
| Expiry date | Dec 23, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B23/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An automatic bypass switch comprising an electronic switch circuit responsive to voltage signals generated by the delay circuit and armed status of an electronic alarm system. The output of the bypass switch is connected to one or more detection circuits so as to shunt or prevent activation when the control has been armed until the delay circuit has been activated. From this time until the panel has been disarmed and rearmed again, the controlled detection circuit(s) is active and not shunted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.