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Very Fine Adjustment of Selection Rack Pinion

IP.com Disclosure Number: IPCOM000085520D
Original Publication Date: 1976-Apr-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Boyatt, RG: AUTHOR [+2]

Abstract

An adjustment means is illustrated in the above figure. The rack 1 which meshes with the pinion 2 is confined in the rotate selection cam 3. The adjustment is made with the three-unit rotate pin 4 in the rotate selection cam 3 at mid-cycle or type head detented position.

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Very Fine Adjustment of Selection Rack Pinion

An adjustment means is illustrated in the above figure. The rack 1 which meshes with the pinion 2 is confined in the rotate selection cam 3. The adjustment is made with the three-unit rotate pin 4 in the rotate selection cam 3 at mid-cycle or type head detented position.

Adjusting screw 5 contains two different thread sizes, i.e., a 6-40 UNC thread on one end and a 6-32 UNC thread on the other end. One end of the screw 5 attaches to a fixed bracket 6 on a carrier side frame or the frame itself and the other end of the screw attaches to the pin block 7.

Each turn of the screw 5 gives 0.006 inch of linear movement to the pin block 7 which, in turn, displaces the cam 3 through pin 4, causing displacement of rack 1 to produce the desired rack to pinion alignment. The pin block 7 is guided during the adjustment to maintain the desired pin to cam clearance. After the desired adjustment is made, pin block mounting screws, not shown, are tightened to retain the adjustment.

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