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Bidirection Continuous or Incrementing Spring Clutch

IP.com Disclosure Number: IPCOM000094347D
Original Publication Date: 1966-Sep-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

May, GH: AUTHOR

Abstract

This clutch can be controlled to provide bidirectional continuous or incremental motion.

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Bidirection Continuous or Incrementing Spring Clutch

This clutch can be controlled to provide bidirectional continuous or incremental motion.

The clutch comprises coil spring 2 wound around input shaft 4. Ends 6 and 8 of spring 2 extend upwardly through a loosely fitting slot in output sleeve 10. Ends 6 and 8 are fastened to ratchet disks 12 and 14 concentrically mounted over sleeve 10. Magnets 16 and 18 control the rotation of disks 12 and 14. The slopes of the teeth of disks 12 an 14 are opposed. If both magnets 16 and 18 are energized, their armatures 22 and 24 engage a tooth of associated disks. This action provides a stop for both disks and permits spring 2 to unwind.

Thus sleeve 10 does not rotate irrespective of the direction of rotation of shaft 4.

If either disk is freed by deenergizing its associated magnet, the corresponding end of spring 2 is permitted to move part way across the slot of sleeve 10. Thus spring 2 is wound tight on shaft 4 which drives sleeve 10 and output shaft 20 if shaft 4 is turning in the proper direction. If shaft 4 is turning in the opposite direction, spring 2 tends to unwind and no rotation of output shaft 20 is produced.

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