| 摘要 |
<p>A motor driven rotatable annulus 20 carries an index member 40, a drive pin 52 of which acts via a link 62 on the lock and is acted on when the lock is manually operated. One surface of the annulus has control slots 36 receiving the pin 52 and the other has notches 28 with intervening lands 30. When the lock is operated manually, the force applied to the pin 52 causes it to ride between the slots 36 to index the manual actions. A pin 46 of member 40 slides and pivots in a slot 48 to allow this movement. When the annulus is rotated by the motor a land 30 engages projection 50 on the member 40 to prevent the sliding of pin 46. The pin 52 is therefore retained in a single slot 36 to be driven by the annulus.</p> |
