System for test sequence annunciation
US4412211A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1981 |
| Grant date | Oct 25, 1983 |
| Priority date | — |
| Expiry date | Aug 28, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for providing a distinctive indication that a system, such as a security system, is in a test mode in which the distinctive indication includes audible and/or visual indications that a test sequence has been initiated, followed by testing of the system during the test sequence, with test results being indicated by altering the format of the audible or visible signal. In one embodiment involving a security system, a periodic signal is changed to a steady state signal when a sensor has been violated, thereby to provide a reminder that the system is in the test mode followed by instantaneous communication to the user of not only the operability of the sensor but also both the transmission of the sensor's output to a central control unit and the operability of this control unit itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.