Status monitoring system for an electronic lock
US5410301A · kind A · utility
32Cited by
15References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1992 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Nov 24, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/00912
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A monitoring and control system is disclosed which samples a plurality of output ports and lines from the microprocessor and the system electronics of an electronic lock to determine whether the bolt is extended, retracted, or the enabling stepper motor has been activated. The presence of a change key may be monitored and the efficacy of a change key controlled to only permit the changing of the combination of the lock when the central monitoring station approves such a change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.