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Bi-Directional Single Revolution Clutch

IP.com Disclosure Number: IPCOM000096820D
Original Publication Date: 1963-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Druschel, WO: AUTHOR

Abstract

This clutch secures single revolution operation in either direction. The clutch is normally unloaded when latched up.

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Bi-Directional Single Revolution Clutch

This clutch secures single revolution operation in either direction. The clutch is normally unloaded when latched up.

Input pulley 21 is normally rotating. Pulley 21 includes clutch drum 22. Output shaft 20 has a pair of bowed spring assemblies 24 and 28 fastened to it by clutch body 27. Each spring assembly includes shoe members 30 and 32, respectively. These are held apart from drum 22 by interposers or pawls 34 and
36. The interposers are electromagnetically operated, e. g., by relay 38. When interposer 36 is operated, power from constantly rotating drum 22 is transmitted to shoe 32, spring 28, body 27 and by set screw to shaft 20. at the end of one revolution, provided the relay 38 is released, interposer 36 first releases the shoe from the drum by stressing the spring. It shortly thereafter stops the output portions of the clutch by engaging a notch in the clutch body. The interval between shoe release and actual stopping of the clutch is adjustable since the spring is slotted where it is fastened by the screw. For counter-clockwise operation, interposer 34 is employed.

In the event both interposers are operated simultaneously, the clutch operates normally in its driven direction which is a desirable fail-safe feature. The shoe springs provide self-adjustment for shoe wear. The interposer that declutches in one direction is also employed as a backlash detent for the other direction of operation. The resistive torque de...