DEVICE FOR DOUBLE ALARM SIGNALLING OF UNAUTHORIZED USE OF AUTOMOBILE Russian patent published in 1995 - IPC

FIELD: automotive industry. SUBSTANCE: device has logic unit, passenger doors, trunk and hood limit switches with make and break contacts. Make contacts of switches are connected directly to logic unit. Device has also drivers door limit switch with make contact connected to logic unit through time delay element. It has also trunk and hood lock electromagnets, radio transmitter, antenna, independent alarm and radio receiver. Installed in key hole of ignition switch is shutter coupled with additional limit switch which has made and break contacts, make contact being connected to logic unit through its time delay element. EFFECT: enhanced reliability of protection. 5 dwg