Vehicle anti-theft system

摘要

A vehicle anti-theft system is provided comprising a mechanical security device mounted in a vehicle to limit rotation of the vehicle steering wheel and an electrically operable security device having armed and disarmed modes in which the starting motor circuit for the vehicle is respectively opened and closed independent of the vehicle ignition switch. The mechanical device includes a key operated locking mechanism for mounting and dismounting the device, the electrically operable device includes a key operated switch mechanism for arming and disarming the device, and the key operated locking mechanism and key operated switch mechanism are operable by the same common key. The electrically operable security device includes circuitry for maintaining the starting motor circuit of the vehicle open in response to an effort to bypass the key operated switch mechanism.