Multiplexed alarm system
US4754262A · kind A · utility
39Cited by
8References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1986 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Aug 8, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B26/004
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A multiplexing method for an alarm system is disclosed in which a plurality of transponders connected in parallel by a pair of wires each monitors an opening and responds to a synchronizing signal after a preprogrammed time delay corresponding to the particular transponder if the opening it is monitoring is secured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.