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Browse Prior Art Database

Shift Device for an Offset Driven Shaft

IP.com Disclosure Number: IPCOM000044756D
Original Publication Date: 1984-Jul-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Goff, W: AUTHOR [+2]

Abstract

A two-position detenting shifter device is shown schematically in the figure. On arm 1 driven shaft 2 is mounted offset from driving shaft 3, each shaft carrying pulleys connected by a timing belt 4. Arm 1 is attached to driving shaft 3 and rotatable around it within the limits of two positions defined by cutouts 5 and 6 provided in arm 1. A printwheel, not shown, carrying two rows of characters could be mounted on shaft 2.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 62% of the total text.

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Shift Device for an Offset Driven Shaft

A two-position detenting shifter device is shown schematically in the figure. On arm 1 driven shaft 2 is mounted offset from driving shaft 3, each shaft carrying pulleys connected by a timing belt 4. Arm 1 is attached to driving shaft 3 and rotatable around it within the limits of two positions defined by cutouts 5 and 6 provided in arm 1. A printwheel, not shown, carrying two rows of characters could be mounted on shaft 2.

Gear 7 is an integral part of the pulley mounted on shaft 2. Gear segment 8 carried by arm 9 selectively meshes with gear 7. Detent spring 10 biases arm 9 in a counterclockwise direction to cause pin 11 to detent into cutout 6. In the detented position gear segment 8 is out of contact with gear 7. Upon energization solenoid 12, connected by compression spring 13 to arm 9, rotates arm 9 clockwise and pin 11 moves out of the detent position and gear segment 8 is brought into meshing contact with gear 7. Next controlled clockwise rotation of gear 7 causes pin 11 to ride up surface 14 to a position opposite cutout 5. Upon de-energizing of solenoid 12, detent spring 10 rotates arm 9 and pin 11 into detent position in cutout 5.

Included on arm 9 is an interlock 15 which cooperates with another interlock 16 provided on driven shaft 2. These interlocks 15 and 16 inhibit meshing between gear 7 and gear segment 8 when they are positioned opposite each other. Otherwise, they do not hinder rotation of driven shaft 2...