| 摘要 |
<p>An anti-theft locking device for an automobile steering shaft (21) encased in a housing (24) comprises an abutment member (22) interengageable with a movable detent member (25) mounted adjacent the abutment member, the detent (25) movable between an engaging and disengaging position. In the engaging position the detent member (25) prevents rotation of the steering shaft (21) and any forces applied to the detent member (25) by forced movement of the steering shaft (21) are transmitted to the housing (24). A slipping clutch arrangement allows relative movement of the shaft and housing with application of high pressure so as to prevent breakage of components. The locking device has a two-part rotatable locking barrel (12, 13) mounted in a lock housing (10, 19) and adapted to operate an ignition switch. Unauthorised rotation of one barrel is ineffective in operating the switch and lock mechanism. An alternative arrangement includes an actuating device engageable with a locking pawl the arrangement being such that unauthorised tampering with the ignition lock renders the pawl actuating device inoperable and inaccessible.</p> |
