Browse Prior Art Database

Spiral Track Head Actuator for Disk Drive

IP.com Disclosure Number: IPCOM000045774D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Bajgert, TA: AUTHOR [+2]

Abstract

Shown above in schematic diagram is a head actuator for indexing a recording head 10 along a fine spiral track on a recording disk (not shown) The recording head 10 is carried be a pivoting arm 12. Arm 12 has a surface follower bearing 14 that rides on the surface of medium 16 wound on head actuator spool 18.

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Spiral Track Head Actuator for Disk Drive

Shown above in schematic diagram is a head actuator for indexing a recording head 10 along a fine spiral track on a recording disk (not shown) The recording head 10 is carried be a pivoting arm 12. Arm 12 has a surface follower bearing 14 that rides on the surface of medium 16 wound on head actuator spool
18.

The medium 16 might simply be MYLAR Trademark of E.I. du Pont de Nemours & Co. tape. If the tape has 1-mil thickness, then the pitch of the spiral track scanned by recording head 10 would be approximately 1 mil for every revolution of head actuator spool 18. The actual pitch equals the thickness of the tape multiplied by the ratio of the distance between head 10 and pivot point 20 to the distance between follower bearing 14 and pivot point 20. The MYLAR tape can be tightly packed on the actuator spool by use of an idler 22. Take-up spool 24 would act to store tape as it is spooled off the actuator spool 18.

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