Apparatus for improving the reliability of an alarm circuit
US4803465A · kind A · utility
4Cited by
10References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1986 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Jul 1, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An adapter module for converting a Class B alarm system to Class A operation. The module includes a first pair of terminals connected to corresponding terminals of a Class B control panel, and second and third pairs of terminals to which Class A alarm loops are connected, one terminal of each of the second and third pairs of terminals being directly electrically connected to a separate terminal of the first pair of terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.