US 4,936,408 A · Apparatus for preventing theft of an automotive vehicle

Abstract

Apparatus for preventing theft of an automobile having a rotatable steering shaft for steering the vehicle and an ignition mounted at a fixed position, includes three equiangularly disposed holes extending transversely through the steering shaft; a steering shaft locking pin movable between a locking position in any hole and an unlocking position out of the holes; and ignition shaft engageable with the steering shaft locking pin for moving the latter into and out of the holes; a dead bolt locking pin engaged by the ignition; a spring which moves the dead bolt locking pin into blocking relation to the steering shaft locking pin to prevent removal thereof from a hole in the steering shaft when the ignition is removed from its fixed position; the upper end of the dead bolt locking pin extending through a first slot in a steering wheel locking plate positioned about the steering shaft and engaging a horn spring to actuate a horn; a plate locking pin engaged by the ignition shaft and movable into a second slot in the steering wheel locking plate when the ignition is turned off; a wire spring connecting the ignition shaft to the plate locking pin; a spring guide rod engaged with the wire spring to prevent removal thereof; and an ignition gear mounted on the ignition shaft and including a projection positioned beneath the plate locking pin when the latter is in its locking position within the second slot of the steering wheel locking plate.

Claims30

Dependent claims

Apparatus for preventing theft of an automotive vehicle of the type having a rotatable steering shaft for steering the vehicle and an ignition mounted at a fixed position in said vehicle, said apparatus comprising:

locking means engageable with said steering shaft for preventing rotation of said steering shaft;
means for moving said locking means in a radial direction of said steering shaft between a locking position in engagement with said steering shaft to prevent rotation of said steering shaft and an unlocking position out of engagement with said steering shaft to permit rotation of said steering shaft;
and
blocking means, movable into blocking relation to the locking means when said ignition is removed from said fixed position, for preventing disengagement of said locking means from said steering shaft.

1 more element

locking means engageable with said steering shaft for preventing rotation of said steering shaft, said locking means including a hole extending transversely through said steering shaft and a steering shaft locking pin movable between a locking position in said hole and an unlocking position out of said hole;
means for moving said locking means between a locking position in engagement with said steering shaft to prevent rotation of said steering shaft and an unlocking position out of engagement with said steering shaft to permit rotation of said steering shaft;
and
blocking means, movable into blocking relation to the locking means when said ignition is removed from said fixed position, for preventing disengagement of said locking means from said steering shaft, said blocking means including a dead bolt locking pin movable behind said steering shaft locking pin to prevent said steering shaft locking pin from disengaging from said hole, when said ignition is removed from said fixed position.

1 more element

three holes extending transversely and equiangularly with respect to each other through said steering shaft;
a steering shaft locking pin movable between the locking position in any of said holes and an unlocking position out of said holes;
an ignition shaft rotatably connected with said ignition and engaged with said steering shaft locking pin for moving said steering shaft locking pin between said locking and unlocking positions;
a steering wheel locking plate coupled to said steering shaft for rotation therewith and having at least one first slot therein and at least one second slot therein;
a plate locking pin movable by said ignition shaft between a locking position in said at least one first slot of said steering wheel locking plate when said steering shaft locking pin is engaged in any of said holes and an unlocking position out of said at least one first slot when said steering shaft locking pin is disengaged from said holes;
a wire spring connected to said plate locking pin and said ignition shaft for causing movement of said plate locking pin between said locking and unlocking positions upon rotation of said ignition shaft;
spring guide rod means mounted in a casing and engaged with said wire spring for preventing removal of said wire spring;
an ignition gear mounted at one end of said ignition shaft and including a projection for engaging below said plate locking pin when the latter is moved to said locking position so as to prevent removal of said plate locking pin from said at least one slot when steering shaft locking pin is engaged in a hole of said steering shaft;
a dead bolt locking pin held in a first position by said ignition;
biasing means for biasing said dead bolt locking pin into blocking relation to said steering shaft locking pin so as to prevent removal of said steering shaft locking pin from said holes when said ignition is removed from said fixed position and for simultaneously moving said dead bolt locking pin into said at least one second slot in said steering wheel locking plate;
and
a horn spring engaged by said dead bolt locking pin when the latter is engaged within said at least one second slot so as to actuate a horn of said vehicle.

9 more elements

Dependencies are inferred from the claim text.

Apparatus for preventing theft of an automotive vehicle

Life of this patent

Apparatus for preventing theft of an automotive vehicle

Life of this patent

Abstract

Claims30