CAR THEFT PREVENTIVE DEVICE

CAR THEFT PREVENTIVE DEVICE

PURPOSE:To keep alarm condition for unfair unlocking certainly by admitting release of alert condition of a theft alarm means only when it is sensed that a key equipped with a regular password magnetic member is inserted in a door cylinder lock. CONSTITUTION: A key sensing device 3 is to sense that...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: ONITSUKA NOBUYUKI, FUKAMACHI MASAAKI
Format: Patent
Sprache:eng
Schlagworte:
ACCESSORIES THEREFOR
ALARM SYSTEMS
FIXED CONSTRUCTIONS
HANDCUFFS
KEYS
LOCKS
ORDER TELEGRAPHS
PERFORMING OPERATIONS
PHYSICS
REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FORVEHICLES
SAFES
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TRANSPORTING
VEHICLES IN GENERAL
VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
WINDOW OR DOOR FITTINGS
WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILARDEVICES FOR VEHICLES
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Beschreibung
Zusammenfassung:PURPOSE:To keep alarm condition for unfair unlocking certainly by admitting release of alert condition of a theft alarm means only when it is sensed that a key equipped with a regular password magnetic member is inserted in a door cylinder lock. CONSTITUTION: A key sensing device 3 is to sense that a key 26 equipped with a regular password magnetic member is inserted in doors 25a, 25b on the driver side and assistant side. That is, said key sensing device 3 consists of a yoke 29 installed in a case 28 outside a door cylinder lock 27, a magnet 30 inside one end of the yoke 29, a hole element 31 inside the other end, and am amplifier circuit 32 outside the other end, Accordingly the magnet 30 generates flux threading a key hole 27a in the door cylinder lock 27, and said hole element 31 senses change of the flux changed by magnetic member 36 provided at the key 26. Then output is made from the amplifier circuit 32. The alert condition is released when this output lies within the set range.