Browse Prior Art Database

Capstan Drive With Sleeve

IP.com Disclosure Number: IPCOM000047701D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Craft, JA: AUTHOR [+2]

Abstract

Cable 1 is wrapped around sleeve 3 (Figs. 2-4), which is keyed to capstan 5 of clutch 7. When clutch 7 is engaged, lateral movement along cable 1 is translated as a rotating drive from clutch 7. Sleeve 3 freely relocates along capstan 5, thereby eliminating forces from cable 1 which would tend to effect clutch engagement and disengagement. In a particular application, clutch 7 is mounted on a printer carrier and is engaged to effect printer ribbon feed. Cable 1 is mounted across between a left-frame member 9 and a right-frame member 11, and includes spring 13 at one side to provide continuous tension. The connection at left-frame 9 is slightly higher than that at right-frame 11 so that cable 1 will wind side-by-side rather than upon itself. Figs. 1a and 1b show the tracking of cable 1 where no sleeve 3 is employed.

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Capstan Drive With Sleeve

Cable 1 is wrapped around sleeve 3 (Figs. 2-4), which is keyed to capstan 5 of clutch 7. When clutch 7 is engaged, lateral movement along cable 1 is translated as a rotating drive from clutch 7. Sleeve 3 freely relocates along capstan 5, thereby eliminating forces from cable 1 which would tend to effect clutch engagement and disengagement. In a particular application, clutch 7 is mounted on a printer carrier and is engaged to effect printer ribbon feed. Cable 1 is mounted across between a left-frame member 9 and a right-frame member 11, and includes spring 13 at one side to provide continuous tension. The connection at left-frame 9 is slightly higher than that at right-frame 11 so that cable 1 will wind side-by-side rather than upon itself. Figs. 1a and 1b show the tracking of cable 1 where no sleeve 3 is employed. When clutch 7 is near the higher side 9 (Fig. 1a), cable 1 is high, producing a downward force tending to disengage clutch 7. When clutch 7 is near the lower side 11 (Fig. 1b), the wrapping of cable 1 is low, producing an upward force tending to engage clutch 7. Figs. 2a and 2b show the system with sleeve 3 at positions corresponding to those of Figs. 1a and 1b, respectively. Instead of cable 1 tracking at the location of wrap, the corresponding forces during wrapping of cable 1 move sleeve 3 perpendicularly to cable 1. Sleeve 3 moves in that direction freely without translating forces to clutch 7. To illustrate this movement,...