Patent GB-995049-A (GB)
Title: An anti-theft steering lock for motor vehicles
IPC: B60R25/021
Filed: 1963-04-11
Abstract: 995,049. Key locks; clamp fastenings. J. VOSS, [trading as JOSEF VOSS KOMMGES.] April 11, 1963 [May 17, 1962], No. 14524/63. Headings E2A and E2B. [Also in Division B7] In a steering column locking device comprising a cylinder lock 12 having a barrel 11 extended in the form of a slotted roller 17 for actuating a spring-loaded bolt 25 and an ignition/starter switch 8, the roller 17 carries spring-loaded stop pins 28, 29 which co-operate with a slotted ring 31 such that upon clockwise rotation of the lock from the locked position H to the unlocked position G the lock cylinder must be depressed axially within its housing before the starting A and driving Z positions can be reached, and so that upon return movement to the locked position H the lock cylinder must be restored to its original axial position by attempted key withdrawal before the bolt 25 engages the steering shaft 1. A housing 6 containing the bolt 25 is secured by a clamp 4 to the steering column and carries a lock housing 7 having internal grooves 16 in which strips 15 on the lock cylinder 12 are axially slidable. A rectangular frame 21 connected to the bolt and through which the roller 17 passes is formed with a bevelled tooth 22 engaging a slot 20 in the roller. The ignition/starter switch 8 is actuated by a slotted sleeve 38 engaging a winged pin 37 on the roller 17, and includes a return spring 39 for returning the switch and the roller 17 from the starting position A to the driving position Z when the key of the lock is released. When the key is inserted in the lock and rotated to the unlocked position G the bolt 25 is withdrawn from engagement with the steering shaft 1 and the stop pin 29 (Fig. 7) abuts the end face 3311 of a slot 33 in the ring 31. The lock and the roller must then be depressed in the housing 7 whereupon the pin 29 is depressed by an inclined surface 35, the pin 28 passes through a groove 40 into a second slot 32, and the slot 20 in the roller 17 moves out of alignment with the tooth 22. The key may then be further rotated to the driving Z or the starting A position. Upon anticlockwise rotation of the key from the driving Z position the pin 28 moves around the second groove 32 until the end face 32<SP>11</SP> is reached with the key approaching the locked H position. However, since the lock is still depressed, the slot 20 is still out of alignment with the tooth 22 and the bolt 25 remains withdrawn until attempted withdrawal of the key displaces the lock thereby moving the pin 28 out of the second slot 32 up an inclined ramp 34, and aligning the slot 20 with the tooth 22. The lock may be secured at either the locked H or unlocked G position by removal of the key. In another embodiment the locking device is enclosed by a casing surrounding the steering column and the axis of the roller and the lock cylinder is tangential to the steering shaft. A single stop pin on the roller engages a slotted ring disposed in the housing between the lock cylinder and the bolt. The slots in the ring have different depths and are arranged such that depression of the lock cylinder is effected automatically when the key is rotated to the unlocked G position.