Ignition switch lock

Claim 1

An ignition switch lock for securement to an ignition switch mounted on the steering column of a vehicle; said steering column being substantially cylindrical in shape and having a first axis, and said ignition switch having a stationary segment fixed to said steering column and a movable segment rotatable with respect to said stationary segment about a second axis substantially perpendicular to said first axis and spaced from said stationary segment to define an annular gap therebetween; said ignition switch lock comprising (a) a substantially cylindrical housing having one end surface shaped to mate with and conform to the contours of the circumference of said steering column coaxially with said second axis, (b) means for engaging the movable segment of said ignition switch comprising at least one movable jaw having at least one semi-circular lip thereon and adapted to move reciprocally between a locked position in mating engagement with said annular gap and an unlocked position out of mating engagement with said annular gap, and (c) means for controlling the reciprocation of said at least one movable jaw between said locked position and said unlocked position comprising (i) at least one rack corresponding to and linked to said at least one movable jaw, said at least one rack having a plurality of teeth thereon, (ii) a rotatable pinion having a plurality of teeth distributed about the circumference thereof for meshing engagement with and linear displacement of said at least one rack, (iii) means for guiding said linear displacement of said at least one rack, and (iv) means for selective rotation of said pinion.