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Browse Prior Art Database

Stepping Motor Escapement

IP.com Disclosure Number: IPCOM000074982D
Original Publication Date: 1971-Jul-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Gardineer, B: AUTHOR

Abstract

A friction drive clutch includes a clutch plate 1 and, friction shoes 2 carried on main gear 4, biased by springs 3 into engagement with plate 1. Gear 4 is carried fast on shaft 5 and meshes with pinion 6. Shaft 5 is journalled in bearing 7, carries pulley 8 fast thereon and drives its belt 9. Plate 1 is carried on shaft 10 which is turned by motor 11. With a light load on belt 9 and when pinion 6 is free to turn, plate 1 drives gear 4 through friction shoes 2. An escapement 12 includes pinion 6 fast on shaft 13. Eccentric cam 14 is also fast on shaft 13 and turns in Scotch-yoke 15 when it is free. Yoke 15 is secured to armatures 16 and 17 of solenoids 18 and 19.

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Stepping Motor Escapement

A friction drive clutch includes a clutch plate 1 and, friction shoes 2 carried on main gear 4, biased by springs 3 into engagement with plate 1. Gear 4 is carried fast on shaft 5 and meshes with pinion 6. Shaft 5 is journalled in bearing 7, carries pulley 8 fast thereon and drives its belt 9. Plate 1 is carried on shaft 10 which is turned by motor 11. With a light load on belt 9 and when pinion 6 is free to turn, plate 1 drives gear 4 through friction shoes 2. An escapement 12 includes pinion 6 fast on shaft 13. Eccentric cam 14 is also fast on shaft 13 and turns in Scotch-yoke 15 when it is free. Yoke 15 is secured to armatures 16 and 17 of solenoids 18 and 19. When a solenoid 18 or 19 is energized with electrical potential, it will restrain withdrawal of its armature 16 or 17 from within its windings or attract the armature towards insertion within the windings. Then it restrains the armature 16 or 17 to brake yoke 15, cam 14, shaft 13, pinion 6 and gear 4 to stop shaft 5, plate 1 continues to turn because the friction clutch 1, 2 releases. When solenoids 18 and 19 are both energized over related conductors 25, 26 and 27, 28, respectively, by source 20 through normally-closed contacts 21 and 22 and solenoid 19 is holding the armature 17, a momentary interruption of power from solenoid 19 will release armature 17 and the pinion 6 can turn 180 degrees until solenoid 18 arrests armature 16. When solenoid 18 is de- energized, in its turn,...