| 摘要 |
<p>A MAGNETIC CARD-OPERATED LOCK HAS A ROTATABLE EXPOSED COVER (10) WITH A PERIPHERAL SLOT (11) INTO WHICH A MAGNETIC CODED OPERATING CARD (51) CAN BY INSERTED FOR UNLOCKING OR LOCKING THE LOCK. THE COVER (10) AND PRINCIPAL LOCKING COMPONENTS ARE MOUNTED TO ROTATE FREELY ABOUT A CENTRAL AXIS BETWEEN A NULL POSITION AND AN UNLOCKING POSITION.A POSITIONABLE WEIGHT IS MOUNTED TO ROTATE WITH THE COVER PLATE AND IS RADIALLY SEPARATED FROM THE AXIS SO AS TO BIAS THE COVER (10) TOWARDS VARIOUS NULL POSITIONS UNDER THE ACTION OF GRAVITY. THERE IS ALSO A CARD LOCK-IN MECHANISM COMPRISING A CARD-LOCK PIN THAT RETAINS A CARD (51) IN THE SLOT (11) WHILE THE LOCK IS UNLOCKED, AND A CARD FOR SAID LOCK WITH HOLE AND DIMPLE PROJECTIONS TO RETAIN IT WHEN INSERTED INTO THE SLOT (11).</p> |
