Head adjustment mechanism for rigid magnetic disc memory apparat

Details Head adjustment mechanism for rigid magnetic disc memory apparat Head adjustment mechanism for rigid magnetic disc memory apparat

1978-04-24

1980-04-29

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 97, 360105, G11B 554, G11B 548, G11B 56, G11B 2124

Patent

active

042008948

ABSTRACT:
An open loop, stepper-motor-driven, rigid magnetic disc memory apparatus for use with a data processing system. A rigid magnetic disc with high track density is driven by a stepper motor in an open-loop fashion or without servomechanism control. The memory apparatus includes: band structure including a spring bias for coupling stepper motor drive to apparatus supporting magnetic heads above and/or below the spinning disc and for temperature compensating for disc/apparatus expansion and contraction; manually operable control for zeroing the magnetic heads, moving and locking them in the disc's landing zone as, for example, while in transit, and providing a travel limit to head movement when the memory apparatus is operating; keying apparatus for preventing erroneous insertion and mis-alignment of and damage to an optical transducer relative to an optical mask arranged to spin with the disc structure; shim apparatus for precisely positioning the magnetic heads in the spin axis direction; viscously-coupled inertia apparatus for damping the stepping motor's step-rotary motion; a device for employing spinning motion associated with the disc for cooling purposes; and other structure.

REFERENCES:
patent: 2530584 (1950-11-01), Pontius
patent: 3199092 (1965-08-01), Hoffman
patent: 3500363 (1970-03-01), Shill
patent: 3609721 (1971-09-01), Meneley
patent: 3859662 (1975-01-01), Habich et al.
patent: 3864749 (1975-02-01), Stansell
patent: 3946439 (1976-03-01), Castrodale et al.
patent: 4071866 (1978-01-01), Butsch
patent: 4123675 (1978-10-01), Moskowitz et al.
B. C. Kuo, Theory and Applications of Step Motors, West Publishing Co., pp. 187-189, 1974.

Affiliated with

Also associated with

Rating

Head adjustment mechanism for rigid magnetic disc memory apparat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Head adjustment mechanism for rigid magnetic disc memory apparat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Head adjustment mechanism for rigid magnetic disc memory apparat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1686151