Monitored security switch assembly
US5821870A · kind A · utility
5Cited by
12References
30Claims
0Family size
Inventor
Key dates
| Filing date | Apr 28, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Apr 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A monitored security switch assembly includes a switching system, a transmission line, and a monitoring system. The switching system has a load element. The security switch assembly uses an oscillatory voltage to determine if the monitoring system, the switching system and the transmission line are impedance matched. The security switch system can function in a transmission mode or a reflection mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.