Vehicle antitheft alarm

Abstract

An antitheft system for vehicles in which an operator actuates a thumbwheel to select one predetermined numerical combination and actuates a push button switch to turn on the system. The operator also actuates the thumbwheel to select another predetermined numerical combination and actuates the push button switch to turn off the system. The actuation of the thumbwheel by an operator to a numerical combination other than one of the predetermined numerical combination results in the operation of an alarm. Disposed within the vehicle are mercury switches, which sense any movement of the vehicle, when the system is turned on. When a mercury switch senses any movement of the vehicle, such as movement caused by the towing of the vehicle or the jacking up of the vehicle, the change of state of the mercury switch initiates the operation of an alarm. Also, the opening of a hood, door or trunk will initiate the operation of an alarm when the system is turned on. The operation of an alarm will also result in the cutoff of power for the ignition system.

Dependencies are inferred from the claim text.