Browse Prior Art Database

Leadscrew Guide and Drive for Sound Head Carrier

IP.com Disclosure Number: IPCOM000074494D
Original Publication Date: 1971-May-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Smith, SP: AUTHOR

Abstract

The soundhead carrier assembly 1, at A and B, slides along a shaft 2 driven by a drive pawl 3, spring loaded by spring 4 into a leadscrew 5 with teeth 5a. The design allows the carrier assembly to rest against and be guided by the leadscrew as well as being driven by it. A carrier shoe 6 comprising powdered metal electrolyzed to produce a chrome surface on its inside diameter rides against leadscrew 5 and is retained by the carrier casting. The shoe design is such that it self-aligns with the leadscrew and maintains parallelism between the leadscrew and drive pawl pivot axis at 7. This prevents relative motion of a sound head, not shown, and drive pawl position and errors introduced by shaft misalignments which cause undesirable movement of drive pawl 3 in an arc about pivot axis 7.

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Leadscrew Guide and Drive for Sound Head Carrier

The soundhead carrier assembly 1, at A and B, slides along a shaft 2 driven by a drive pawl 3, spring loaded by spring 4 into a leadscrew 5 with teeth 5a. The design allows the carrier assembly to rest against and be guided by the leadscrew as well as being driven by it. A carrier shoe 6 comprising powdered metal electrolyzed to produce a chrome surface on its inside diameter rides against leadscrew 5 and is retained by the carrier casting. The shoe design is such that it self-aligns with the leadscrew and maintains parallelism between the leadscrew and drive pawl pivot axis at 7. This prevents relative motion of a sound head, not shown, and drive pawl position and errors introduced by shaft misalignments which cause undesirable movement of drive pawl 3 in an arc about pivot axis 7. Prevention of such misalignments and arcuate pawl movement eliminates tracking errors. The assembly also includes a backspace pawl 8.

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