Magnetic contact tamper switch for security accessories

Details Magnetic contact tamper switch for security accessories Magnetic contact tamper switch for security accessories

2006-12-19

2006-12-19

Trieu, Van T. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S545200, C340S547000, C200S06145M, C335S205000, C335S207000, C116S203000

Reexamination Certificate

active

07151461

ABSTRACT:
A tamper detection switch is primarily for use in an enclosure of a security system component. The enclosure has a base and a cover that may be repositioned relative to the base. One of the cover and the base holds a conductive magnetic element free to translate within a predetermined range generally perpendicular to the respective cover or base. The other of the cover and the base holds at least two ferrous metal contacts of an open tamper circuit in proximity of a conductive magnetic element. In the closed position the conductive magnetic element bridges the ferrous contacts and closes the tamper circuit. Attempts to tamper with the enclosure separate the ferrous contacts from the conductive magnetic element, opening the tamper circuit and signaling a possible attack.

REFERENCES:
patent: 4296394 (1981-10-01), Ragheb
patent: 4982684 (1991-01-01), Rubey
patent: 5483214 (1996-01-01), Perreira et al.
patent: 5945915 (1999-08-01), Cromer et al.
patent: 6642824 (2003-11-01), Oomkes

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