Multiple sensor intrusion detection system
US4321592A · kind A · utility
20Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1978 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | May 30, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/014
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A multiple zone intrusion detection system in which a plurality of intrusion sensors can be readily converted into the system without system modification, and in which mode control signals from a central control unit and alarm signals from the sensors are both conveyed on a single conductor of the system cable. Each sensor has an associated interface module which permits coupling of different types of sensors to the system and sharing of a single conductor for mode control signals and alarm signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.