ANTITHEFT DEVICE Russian patent published in 1994 - IPC

FIELD: automotive industry. SUBSTANCE: device has two-position switch with three groups of contacts 1, 2, 14, ignition switch 3, ignition coil 4, current limiting resistor 5, first electromagnetic relay 6 with first and second contact groups 6.1 and 6.2, heating resistor 7, transistor 8, thermal transistor 9, second electromagnetic relay 10, inductor 11, capacitor 12 and radiating element 13. With device switched on, in case of unauthorized switching on of ignition switch 3, alternate resistorless connection of storage battery with ignition coil and connection through current-limiting resistor 5 is provided. Vehicle fails to move. Electromagnetic oscillations created by ignition system are transmitted as radio signals when attempt is made to drive away car. EFFECT: enhanced reliability. 2 dwg