Security system with fall back to local control
US5717378A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1996 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Apr 1, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/016
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A security system having a communications link with a central control, including a local network responds: a) to central control when the central communications link is operational; and, b) to local control when the central communications link malfunctions. More specifically, the local network includes a plurality of receivers for detecting emergency communications, an alarm for issuing a perceptible warning and a local control. The local control notifies the central control when an emergency signal is detected and activates the alarm in response to direction from the central control. The local control also includes logic for directly activating the alarm when an emergency signal is detected and there is no response from central control. According to more specific features, the central control includes data for validating emergency signals and activates the alarm only after validation. The local control, on the other hand, activates the alarm without validation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.