Time multiplexed, false alarm resistant magnetically actuated security system
US5534849A · kind A · utility
38Cited by
12References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1994 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Dec 6, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0036
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A magnetically actuated switch system (10) has reduced sensitivity to false alarms and reduced power consumption and resistance to physical and magnetic tampering. The system includes a signal processing circuit controlled by a microprocessor (16) that selectively enables magnetic sensors (12, 38), and compares the corresponding sensor outputs (76) to automatically calibrated level and predetermined timing characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.