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Browse Prior Art Database

Typewriter Drive Transmission

IP.com Disclosure Number: IPCOM000073940D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Lingle, CH: AUTHOR

Abstract

This typewriter drive transmission is a substitution for existing drive trains for driving the leadscrew in the forward and reverse directions and consists of a single package which can be removed and replaced as a unit. The leadscrew, not shown, is driven directly with this unitary drive mechanism which is carried in housing 4 and powered by motor 21. The belt and pulley system comprising pulleys 22,20,17 and 18, and belts 19 and 16 provides power to the forward drive slip clutch 11 and is arranged for easy access and replacement of primary drive belt 19. Clutch 11 is maintained in housing 4 by shafts 13 and 14 journaled in the housing. Connected to shaft 13 and driven by clutch 11 is gear 12 that drives gear 5 and gear 6 which is connected to the leadscrew.

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Typewriter Drive Transmission

This typewriter drive transmission is a substitution for existing drive trains for driving the leadscrew in the forward and reverse directions and consists of a single package which can be removed and replaced as a unit. The leadscrew, not shown, is driven directly with this unitary drive mechanism which is carried in housing 4 and powered by motor 21. The belt and pulley system comprising pulleys 22,20,17 and 18, and belts 19 and 16 provides power to the forward drive slip clutch 11 and is arranged for easy access and replacement of primary drive belt 19. Clutch 11 is maintained in housing 4 by shafts 13 and 14 journaled in the housing. Connected to shaft 13 and driven by clutch 11 is gear 12 that drives gear 5 and gear 6 which is connected to the leadscrew. During this operation the reverse spring clutch 1 is slipping; being driven by belt 10 and pulley 9 in a reverse direction. Clutch 1 is positioned in housing 4 by shafts 2 and 3 journaled in the housing. When the leadscrew is to be driven in the reverse direction, reverse magnet 7 is actuated. This action drives spring shoe 8 into contact with the spring to engage clutch 1. Power is then transmitted through clutch 1 directly to gear 5 to reverse gear 12 and override clutch 11, to thereby drive gear 6 and the connected leadscrew in the reverse direction.

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