AUTOMOBILE CODE ANTITHEFT DEVICE Russian patent published in 2003 - IPC

FIELD: transport engineering; security systems and devices. SUBSTANCE: proposed antitheft device has four multiposition selector switches, remote switch, relays, sound alarm, resistor, sealed contact reed relay, light emitting diode indicator, master oscillator, two 90^°, phase shifters, two scaling multipliers, two modulating code generators, two phase keyers, transmitter, transmitting antenna, two receiving antennas, two receivers, wide-band filter, three narrow-band filters, phase detector, indicator, coding unit, two oscillatory circuits, heterodyne, mixer, intermediate frequency amplifier, supply source, push-button switch, permanent magnet, two multipliers, low-pass filter, memory unit, threshold unit, actuator unit, mechanical lock switch. To operate radio channels, phase-shift keyed complex signals are used featuring improved stability to noise, structural and power secrecy. Said signals predetermine new type of selection, namely, structural selection. Proposed device features enlarged functional capabilities and it provides, both transmission of alarm signals by radio to receiving station and reliable protection of vehicle interior from unauthorized access. EFFECT: improved protection of vehicles against thefts. 2 dwg