| 摘要 |
Apparatus for preventing unauthorized operation of a vehicle with a steering shaft (1) comprises a helical spring (10) which surrounds, for part of its length, the steering shaft (1) and for the remainder of its length an extension portion (11) of a sleeve (7) which is fixed to an outer column (18). One end of the spring is fixed to the sleeve and the other end (12), which is disposed in the region of the steering shaft (1), is connected to an adjustable lock bolt (14). By actuating the lock bolt (14) the coils of the helical spring are pressed close against the steering shaft (1) to prevent rotation thereof in one direction. In a modification two springs are provided which prevent rotation of the shaft in both directions. <IMAGE>
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