| 摘要 |
<p>A TUBULAR LOCK OF THE KIND HAVING A BODY (1) AND A BARREL ASSEMBLY (2) WHICH IS MOUNTED WITHIN THE BODY (1) FOR RELATIVE ROTATION ABOUT AN AXIS (A). THE ASSEMBLY (2) INCLUDES A TUBULAR SLEEVE (4) AND A NUMBER OF DISC TUMBLERS (5) LOCATED WITHIN THE SLEEVE (4) SO THAT EACH IS ROTATABLE RELATIVE TO THE SLEEVE AND RELATIVE TO ONE ANOTHER ABOUT THE AXIS (A). A SIDE LOCKING BAR (9) IS OPERATIVE TO PREVENT ROTATION OF THE ASSEMBLY (2) RELATIVE TO THE BODY (1), AND THAT BAR IS RENDERED INOPERATIVE BY INSERTION OF A CORRECT KEY INTO THE LOCK KEYWAY. THE DISC TUMBLERS (5) ROTATE IN RESPONSE TO INSERTION OF A KEY INTO THE KEYWAY AND INCLUDE A NUMBER OF STANDARD TUMBLERS AND A SPECIAL TUMBLER (5A). THE LOCKING BAR (9) IS INOPERATIVE WHEN EACH STANDARD TUMBLER (5A).THE LOCKING BAR (9) IS INOPERATIVE WHEN EACH STANDARD TUMBLER (5) IS AT A SERVICE POSITION OF ROTATION AND THE SPECIAL TUMBLER (5A) IS AT EITHER A SERVICE POSITION OR A SECOND FUNCTION POSITION OF ROTATION.A SERVICE KEY (20) IS OPERABLE TO PLACE ALL TUMBLERS (5) AT THE SERVICE POSITION,AND A SPECIAL CHANGE KEY (37) IS OPERABLE TO PLACE THE SPECIAL TUMBLER (5A) AT THE SECOND FUNCTION POSITION AND TO PLACE ALL OTHER TUMBLER (5) AT THE SECOND FUNTION POSITION IT RELEASE A MOVABLE DETENT (23) WHICH IS OTHERWISE OPERATIVE TO PREVENT AXIAL REMOVAL OF THE ASSEMBLY (2) FROM THE BODY (1).BUT SUCH REMOVAL IS NOT POSSIBLE UNTIL THE CHANGE KEY (37) IS TURNED TO ROTATE THE ASSEMBLY (2) TO POSITION A WHICH A FIXED DETENT (28) IS ALIGNED WITH A LONGITUDINAL GROOVE (33) OF THE BODY (1).THE KEY (20,30) IS FORMED BY USED OF A COMPUTER CONTROLLED MACHINE WHICH ENABLE SELECTION OF ANYONE OF A NUMBER OF KEY FORMING OPERATION SEQUENCES,EACH OF WHICH PRODUCES A KEY (20,37)HAVING CHARACTERISTICS TO SUIT A PARTICULAR LOCK. (FIG.1)</p> |
