Browse Prior Art Database

Disk Retracting Device

IP.com Disclosure Number: IPCOM000083132D
Original Publication Date: 1975-Apr-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Janeway, DL: AUTHOR

Abstract

A rotatable flexible disk is retracted when at rest to prevent damage to its surface.

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Disk Retracting Device

A rotatable flexible disk is retracted when at rest to prevent damage to its surface.

The flexible disk is rotated on a shaft at a speed normally sufficient to dynamically lubricate the space between the disk and a supporting plate. Air is drawn underneath the plate through an aperture during rotation. When the speed of rotation drops below a critical point, however, insufficient air is drawn through the aperture and the disk might contact the plate and be damaged.

Contact between the disk and plate at low-rotational speeds is prevented by spring-loaded flyweights, which, during rotation, travel outward forcing the disk down toward the plate by pivoting lever arms against a shoulder. When the disk slows down, the flyweight drops to a vertical position permitting the spring to draw the disk away from the plate to maintain the disk safely out of contact.

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