Security apparatus

Details Security apparatus Security apparatus

1994-12-08

1997-10-21

Hofsass, Jeffery

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

340430, 340542, 340546, 70427, 70455, B60R 2510

Patent

active

056800959

ABSTRACT:
A security apparatus for buildings, vehicles and the like includes a switch mounted adjacent to a closure access member. A housing mounted adjacent to the closure access member receives a member movable between first and second positions. When the movable member is in the first position, a magnet mounted in the member is disposed in close proximity to the switch to magnetically move the switch contact to an open position. When the movable member is moved to a second position, the magnet is magnetically decoupled from the switch enabling the switch contact to close to ground completing a circuit to activating the alarm. In another embodiment, the magnet is mounted in a body. A rod extends from the body and carries a holder and a lock cylinder engagement member at another end. The lock cylinder engagement member is releasibly insertible into a lock cylinder to position the magnet adjacent to a switch mounted on the closure member. Any removal of the key lock cylinder engagement member separates the magnet from the switch causing the switch contact to close to ground activating the alarm. In another embodiment, a grounded key inserted into a lock cylinder completes a circuit through a relay coil activating the relay coil and causing a relay switch contact to open disabling the alarm. Removal of the key de-energizes the relay causing the switch contact to move to a normally closed position activating the alarm.

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