Browse Prior Art Database

Pin Wheel Drive and Lock

IP.com Disclosure Number: IPCOM000081944D
Original Publication Date: 1974-Sep-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 82K

Publishing Venue

IBM

Related People

Harrington, RH: AUTHOR [+3]

Abstract

Referring to the end elevation view of Fig. 1 and the cross-sectional view in Fig. 2, an adjustable pin wheel feed for continuous forms is shown in which a pin wheel 1 is slidably mounted on a square shaft 7. A lock wheel 2 is coupled to the pin wheel 1 by internal and external slots 4, which cause relative rotation of the pin wheel and lock wheel in response to relative axial movement.

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Pin Wheel Drive and Lock

Referring to the end elevation view of Fig. 1 and the cross-sectional view in Fig. 2, an adjustable pin wheel feed for continuous forms is shown in which a pin wheel 1 is slidably mounted on a square shaft 7. A lock wheel 2 is coupled to the pin wheel 1 by internal and external slots 4, which cause relative rotation of the pin wheel and lock wheel in response to relative axial movement.

Springs 3 bias the pin wheel 1 and lock wheel 2 apart causing them to bind on the square shaft 7 and lock the pin wheel in position on the shaft. A main lever 10 and an associated pinch lever 5, when pinched together, move the pin wheel 1 and lock wheel 2 toward each other against the action of the springs 3, releasing the assembly for sliding on the shaft 7 to a desired position.

The housing 8 is so dimensioned that when the backlash clearance 9 is taken up, there is still some axial clearance 6 between the housing and the assembly of the pin wheel and lock wheel. Thus there is no axial load exerted by the housing 8 when the pinch lever 5 is not actuated.

When the pinch lever 5 is released, the springs 3 force the pin wheel 1 and lock wheel 2 apart causing relative rotation which locks the pin wheel and lock wheel on the shaft 7, to prevent further axial motion of the assembly on the shaft.

Figs. 3 and 4 show end elevation and cross-sectional views of another form of pin wheel feed lock and drive, in which the pin wheel 11 and lock wheel 12 are slidably mounted on a square shaft 17. The coupling between the axial...