Abstract: A key-manipulatable switch for a motor vehicle ignition system having a housing and a cylinder mounted within the housing for rotational and axial movement with respect thereto includes cooperating components which prevent the rotation of the cylinder counterclockwise from a first rotational position to a second rotational position unless the cylinder is in a preselected axial position with respect to the housing while permitting unrestricted clockwise rotation of the cylinder to any of several rotational positions. In one embodiment, the cylinder includes a spring-biased stop member which cooperates with a lug-like projection defined by the housing.

Abstract: A steering lock assembly and method for utilization in a vehicle having a transmission control member mounted for movement between a PARK mode position and a non-PARK mode position utilizes a key-operable switch including a housing mountable in a generally stationary condition within the vehicle and a keyway cylinder mounted within the housing for rotational movement relative thereto between positions corresponding to LOCK and non-LOCK modes of the switch. The lock assembly includes a locking mechanism associated with the switch for locking the steering arrangement of the vehicle when and only when the keyway cylinder is positioned in the LOCK mode position, and a camming arrangement is mounted adjacent the keyway cylinder and connectable to the transmission control member for movement therewith.