VEHICLE ANTITHEFT DEVICE Russian patent published in 1995 - IPC

FIELD: transport. SUBSTANCE: device has supply source, resistor, remote-controlled switch with windings, light emitting diode indicator, hermetically sealed reed relay, ignition key, intermittent signal generator, relay driving generator, phase keyer, transmitter, transmitting antenna, receiving antennas, receivers, delay line, recorder, 90-degree phase shifters, multipliers, low frequency filters, squarers, summer, square rooting circuit and unipolar gate. To transmit alarm information by radio channel, phase-shift keyed signal is used featuring higher noise stability and structure and energy security. EFFECT: transmission of alarm information by radio channel to receiving station, possibility of definitely and accurately taking the bearing of hijacked car. 3 dwg