Browse Prior Art Database

Fast Actuator

IP.com Disclosure Number: IPCOM000083416D
Original Publication Date: 1975-May-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

McGinnis, BW: AUTHOR

Abstract

In the IBM Technical Disclosure Bulletin, Vol. 17, No. 12, May 1975 page 3669, a moving coil synchronous actuator is described which quickly produces a partial opening between rotating flexible disks, to prepare a target space for inertially delayed entrance of a larger blade. The larger blade widens the opening to accommodate a transducing head. The device described below quickly produces a starting opening, and widens it sufficiently to receive a transducer head in a single motion.

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Fast Actuator

In the IBM Technical Disclosure Bulletin, Vol. 17, No. 12, May 1975 page 3669, a moving coil synchronous actuator is described which quickly produces a partial opening between rotating flexible disks, to prepare a target space for inertially delayed entrance of a larger blade. The larger blade widens the opening to accommodate a transducing head. The device described below quickly produces a starting opening, and widens it sufficiently to receive a transducer head in a single motion.

The device consists of a moving coil actuator with a small penetrating tip 1 and a contoured body 3 producing the desired widened opening, after a very short high-speed displacement of approximately 0.080 inch. The contoured body may be convex, concave or angular as indicated in Figs. 1, 2 or 3, respectively. The tip 1 and contoured body 3 are indicated in Figs. 4 and 5. The tip quickly forms a slight initial opening which the body expands along a long circumferential segment of arc.

The device may also be made in the form of a wheel, as indicated in Figs. 6 and 7, having vanes 7 driven in rotation by action of air jets and insertable radially between the disks, for short distances, by action of a moving coil actuator or the like.

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