Test indicator control circuit for security alarm device
US5898368A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1998 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Mar 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/14
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An intrusion detector for monitoring a space has a sensor for generating detection signals in response to detections of events occurring in the space and an indicator for receiving the detection signals and for generating detection indications in response thereto. A controllable switch is operably interposed between the sensor and the indicator and operates to connect or disconnect the sensor and the indicator. A switch control circuit is connected to the switch. A test trigger device is connected to the control circuit to generate an initiate-test signal to the control circuit. The control circuit is also connected to the sensor and receives and counts detection signals. The control circuit controls the operation of the switch by generating a switch control signal in response to the initiate-test signal and to the counting of detection signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.