| 摘要 |
1,118,584. Clutch control. EASTMAN KODAK CO. 10 May, 1965 [8 May, 1964], No. 1878/68 Divided out of 1,118,583. Heading F2L. A clutch spring 90 contracts to connect an input shaft to an output shaft when its end 88 is released by a detent 84 on energization of an electromagnet 94. A switch 110, which is closed manually for forward indexing of a projector slide tray mechanism, completes a circuit from the secondary 112 of a transformer through the electromagnet 94, detent 84 and clutch spring 90 back to the secondary coil 112, so that the electromagnet is energized to remove the detent to permit the clutch to engage, the circuit being broken when the detent releases the spring end 88 so that the detent is restored to its initial position soon after the clutch has engaged for reasons to do with the indexing mechanism. On the completion of a revolution, providing the manual switch has been opened in the meantime, the clutch is disengaged. For reverse indexing of the slide tray mechanism a switch 116 is closed which connects the electromagnet 94 directly across the secondary coil 112 so that the detent is removed from the path of the spring end 88 until the switch 116 is opened. |
