Browse Prior Art Database

Planetary Gear Clutch

IP.com Disclosure Number: IPCOM000092474D
Original Publication Date: 1966-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Litkenhus, JR: AUTHOR

Abstract

The clutch is used in a system for moving papers or cards. The clutch employs a planetary gear train controlled by a brake. The latter is controlled by a linkage which is selectively engageable with the planet gear carrier.

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Planetary Gear Clutch

The clutch is used in a system for moving papers or cards.

The clutch employs a planetary gear train controlled by a brake. The latter is controlled by a linkage which is selectively engageable with the planet gear carrier.

Sun gear 1 acts as the input to the system. Gear 1 is normally continuously driven by input belt 3, powered by a motor not shown. Planet carrier 5 is keyed to output shaft 7 which serves as the output for the system. The circumference of carrier 5 has teeth 9 adapted to engage magnet armature 11 when it is in a lowered position. To engage the clutch, magnet 13 is energized to raise armature 11.

Brake shoe 15 is biased by spring 19 to produce a frictional drag on ring gear
17. With armature 11 raised, shoe 15 is effective to hold gear 17 and carrier 5 is therefore driven by gear 1 as planet gears 21 must progress around the inner circumference of gear 17. Output shaft 7 is therefore rotated.

Magnet 13 is de-energized to terminate the output power. One tooth 9 then engages armature 11. Armature 11, which is integrally linked to shoe 15, is moved by the energy of carrier 5 away from the direction of bias of spring 19. As shoe 15 becomes no longer tightly pressed, gear 17 begins to freely move and carrier 5 becomes substantially stationary. Therefore, no output is transmitted. Check pawl 23 prevents carrier 5 from rotating counterclockwise so the system is free to idle indefinitely without transmitting an output. Guide 25 hol...