G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 13/06 (2006.01)
Patent
CA 2600259
An anti-tamper device for detecting relative movement between a part (25) having a stud (12; 83) clamped to a mounting (24) by a nut (13; 55). The nut (13; 55) holds a sensor (7, 8, 9, 10; 41, 52, 54) in a conductive condition but, when the part (25) is removed from the mounting (24), the sensor (7, 8, 9, 10; 41, 52, 54) becomes non-conductive. A circuit is provided to provide and detect the change of state of the sensor to provide an alarm. The device may be used to detect the removal of a keypad from a mounting.
La présente invention concerne un dispositif anti-sabotage permettant de détecter le mouvement relatif entre une partie (25) ayant une tige (12 ; 83) fixée à un support (24) à l~aide d~un écrou (13; 55). L~écrou (13 ; 55) maintient un capteur (7, 8, 9, 10 ; 41, 52, 54) d~une façon conductrice mais lorsque la partie (25) est retirée du support (24), le capteur (7, 8, 9, 10 ; 41, 52, 54) devient non conducteur. Un circuit est prévu afin de réaliser et de détecter le changement d~état du capteur et de déclencher une alarme. Le dispositif peut être utilisé pour détecter le retrait d~un clavier hors d~un support.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Keymat Technology Limited
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