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Electrically Operated Spring Clutch

IP.com Disclosure Number: IPCOM000096971D
Original Publication Date: 1962-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Pastrone, G: AUTHOR

Abstract

This spring clutch is electrically controlled without need of external latches or stops. It, therefore, can be energized at any shaft position. On the drive shaft are mounted the collector rings and the solenoid. On the driven shaft are mounted the drum which carries the tapered wrap spring and the expansion limiting shield.

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Electrically Operated Spring Clutch

This spring clutch is electrically controlled without need of external latches or stops. It, therefore, can be energized at any shaft position. On the drive shaft are mounted the collector rings and the solenoid. On the driven shaft are mounted the drum which carries the tapered wrap spring and the expansion limiting shield.

The inside diameter of the spring is ground with an interference fit on the carrying drum in order to insure contact. The outside diameter of the spring is ground conical in order to decrease the flexibility for the portion over the solenoid. The outside diameter of the solenoid has a clearance fit with the inside diameter of the spring.

Upon energizing the solenoid, the end of the spring is attracted first, due to its greater flexibility and the wrapping action begins. The torque is then transmitted by virtue of the friction generated between the solenoid surface and the spring. When the solenoid is de-energized the spring tends to return to its original position.

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