ANTITHEFT DEVICE FOR AUTOMOTIVE VEHICLES Russian patent published in 1994 - IPC

FIELD: transport. SUBSTANCE: device has power source 1, current-limiting resistor 2, remote-controlled switch 3 with windings 4 and 5, light-emitting diode 6, hermetically sealed reed switch 7, ignition switch 8, intermittent signal generator 9, relay 10, master generator 11, phase manipulator 12, transmitter 13, transmitting antenna 14, receiving antenna 15, receiver 16, frequency doubler 17, narrow-band filter 18, scale-of-two frequency divider 19, frequency detector 20, flip-flop 21, balance switch 22, phase detector 23 and indicator 24. Device not only blocks engine at unauthorized attempt to drive car, but provides transmission of alarm signal by radio to receiving station. Phase-shift keying signal is used to transmit information which features enhanced antinoise stability, structural and power security. EFFECT: enhanced reliability. 2 dwg