Security interlock switch system for smoke detectors and the like
US4092641A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1976 |
| Grant date | May 30, 1978 |
| Priority date | — |
| Expiry date | Jul 6, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/06
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Attempts to pilfer or tamper with condition detector structures such as smoke detectors, intrusion detectors or the like are discouraged by incorporating switch apparatus within the enclosure for the condition detector device. This switch is directly associated with the hardware required for attaching the housing to a wall, ceiling or other structure so that the normal condition alarm signal generated, such as, when smoke, intruders or other sensed conditions are present is simulated by the attempts at removal of the mounting hardware. The invention is particularly useful in conjunction with condition detecting devices having self-contained internal apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.