Anti-theft lock device

Claim 1

AN ANTI-THEFT LOCK DEVICE FOR VEHICLES AND THE LIKE, COMPRISING A HOUSING ADAPTED TO BE SECURED TO A FIXED PART OF THE VEHICLE, A KEY-ACTUATED ROTATABL LOCK IN SAID HOUSING, A SPRING-LOADED BOLT MEMBER SLIDABLY ARRANGED WITHIN SAID HOUSING AND ADAPTED TO IMMOBILIZE A PORTION OF A CONTROL MEMBER OF THE VEHICLE IN A FIRST PREDETERMINED POSITION OF SAID LOCK, SAID BOLT MEMBER INCLUDING A FIRST PORTION ENGAGEABLE WITH SAID CONTROL-MEMBER PORTION AND A SECOND ALIGNED PORTION PROVIDED WITH A CAVITY HAVING ARCUATE ENGAGING SURFACES, A CAM BARRELL OPERATIVELY CONNECTED TO SAID LOCK AND ROTATBLE WITHIN SAID CAVITY, A SLIDE MEMBER RECIPROCABLE WITHIN A APETURE OF SAID CAM BARREL AND MOVABLE THEREWITH IN SAID CAVITY, ONE END OF SAID SLIDE MEMBER BEING FORMED WITH LATERAL FACES ADAPTED TO CONTACT LATERAL PORTIONS OF SAID ENGAGING SURFACES WHEN SAID CAM BARREL IS ROTATED UPON ACTUATION OF SAID LOCK, THE OTHER END OF SAID SLIDE MEMBER HAVING AN END FACE ADAPTED TO CONTACT A TRANSVERSAL PORTION OF SAID ENGAGING SURFACES SO THAT ROTATION OF SAID CAM BARREL WILL MOVE SAID SECOND BOLT PORTION AWAY FROM SAID CONTROL-MEMBER PORTION ON EFFECT OF THE SLIDE-MEMBER MOVEMENT, A FIRST SPRING-LOADED CATCH RECIPROCABLY SECURED TO SAID SLIDE MEMBER AND ADAPTED TO HOLD SAID BOLT MEMBER AGAINST MOVEMENT UPON ENGAGEMENT WITH THE TIP OF SAID KEY IN A SECOND PREDETERMINED POSITION OF SAID LOCK, AND A SECOND SPRING-LOADED CATCH SLIDABLY SECURED TO SAID SLIDE MEMBER IN A SPACEDAPART RELATION WITH SAID FIRST CATCH AND ADAPTED TO HOLD SAID FIRST BOLT PORTION AGAINST MOVEMENT AWAY FROM SAID CONTROL-MEMBER PORTION WHEN SAID KEY IS WITHDRAWN FROM SAID LOCK IN SAID FIRST POSITION.