Title: Security interlock switch system for smoke detectors and the like

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.

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Inventors: Bellinghausen, Thomas A. (Lakewood, CO, US)
Gilman, Gareld I. (Indian Hills, CO, US)

Application Number: 703059
Filing Date: 1976-07-06
Publication_date: 1978-05-30
Assignee: Statitrol Corporation (Lakewood, CO)
Primary Class(es): 340/521 200/61.03, 340/571, 340/628, 340/629
Other Classes:
US Patent Ref:

2346171	Apr, 1944	Laford	340/276.
2654082	Sep, 1953	Cahusac	340/409.
3440636	Apr, 1969	Sliman	340/280.
3451369	Jun, 1969	Leve et al.	116/86.
3588866	Jun, 1971	Schlafly	340/276.
3858193	Dec, 1974	Bach	340/164.

Other Refs:
Primary Examiner: Caldwell, Sr., John W.
Assistant Examiner: Crosland, Donnie L.
Attorney: Reilly; John E.