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Cord Tensioning Device

IP.com Disclosure Number: IPCOM000093875D
Original Publication Date: 1966-Mar-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Abbott, TD: AUTHOR [+3]

Abstract

The arrangement takes up the slack in elongated cords 10 and 11 which move carrier 12 in a machine, such as a single element printer.

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Cord Tensioning Device

The arrangement takes up the slack in elongated cords 10 and 11 which move carrier 12 in a machine, such as a single element printer.

Carrier 12 mounts single print element 13. One end of tabulation cord 10 is attached to carrier 12. The other end, after passing about stationary guide pulley 14, is attached to and wound about tabulation drum 15. Carrier return cord 11 extends from carrier 12 about pulleys 16 and 17 to carrier return drum 18. Drum 15 is rigidly mounted on shaft 20. One-way clutch spring 21 interconnects shaft 20 and drum 18. The latter is biased for counterclockwise rotation by coil spring
22. This maintains a predetermined tension on cords 10 and 11. Mainspring 23 is drivingly connected to shaft 20. Mainspring 23 exerts a force tending to wind cord 10 on drum 15 and move carrier 12 in the forward escapement or tabulation direction as indicated by arrow 24. Shaft 20 is driven in the opposite direction by a drive motor, not shown, to move carrier 12 in the opposite direction and wind mainspring 23 during carrier return operations.

If cords 10 and 11 stretch or lengthen during usage, spring 22 rotates drum 18 counterclockwise to take up the slack and maintain a predetermined tension on cords 10 and 11. Spring 21 permits winding of cord 11 on drum 18 in this direction independently of shaft 20. However, shaft 20 can be driven to cause winding of cord 22 on drum 18 during carrier return operations. The apparatus maintains proper...