Communications: electrical – Condition responsive indicating system – With particular system function
Reexamination Certificate
2007-01-30
2007-01-30
La, Anh V. (Department: 2612)
Communications: electrical
Condition responsive indicating system
With particular system function
C340S568100, C340S521000, C340S539310
Reexamination Certificate
active
11088917
ABSTRACT:
A tamper switch body is disposed in a housing of a PIR sensor. A tamper opening is formed at a position opposite a switch actuating member of the tamper switch body in a base plate of the PIR sensor. An elastic switch member is mounted in the tamper opening. The elastic switch member includes a pressure-receiving projection portion abutting a mounting plate, and depresses the switch actuating member through elastic deformation of the pressure-receiving projection portion by receiving a pushing force from the mounting plate in a state in which the PIR sensor is fixed to a wall surface. The elastic switch member seals the inside of the housing by closing the tamper opening, thus preventing a flood into the housing of the PIR sensor.
REFERENCES:
patent: 4092641 (1978-05-01), Bellinghausen et al.
patent: 5753983 (1998-05-01), Dickie et al.
patent: 5764729 (1998-06-01), Black et al.
patent: 6301501 (2001-10-01), Cronin et al.
patent: 6956479 (2005-10-01), Kelsch et al.
patent: 0568137 (1992-04-01), None
patent: 2254944 (1992-10-01), None
patent: 2359649 (2001-08-01), None
La Anh V.
Optex Co. Ltd.
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