Locking device

Claim 1

In a locking device for an ignition system of a motor vehicle having a reciprocable tumbler mounted within a housing section which is adapted to be supported by the frame of a mOtor vehicle and electrically connected therewith, said tumbler in one position of adjustment adapted to be retained substantially within said housing section in an inwardly reciprocable position by a spring loaded plunger carried by said tumbler, and an electrical switch means for grounding the said ignition system of the motor vehicle contained within the said housing section and operably associated with said tumbler, the improvement comprising; an insulating switch body mounted within said housing section spaced axially inwardly from said tumbler and having a passage formed longitudinally therein, a fixed electrical contact eyelet connected by electrical conductive means with the primary circuit of the ignition system of the motor vehicle fixedly mounted within said passage adjacent the inner end thereof, said passage having an electrically conductive contact pin mounted for reciprocable movement in the opposite end thereof, an electrically conductive compression spring disposed in said passage between said fixed eyelet and said reciprocable contact pin urging said contact pin into electrical contact with said tumbler when said tumbler is held in said inwardly reciprocable position within said housing section, and said tumbler adapted to be urged out of electrical contact with said reciprocable contact pin by a second spring means when said tumbler is not retained in said inwardly reciprocable position; whereby said primary circuit is in electrically grounded connection with said frame of the motor vehicle when said tumbler is in the said inwardly reciprocable position of adjustment.