US3913138A — Flying magnetic strip head

Claim 1

Independent Claim 92 words

In a low mass flying head arrangement for use with a rotating memory device comprising: a. a cantilevered strip of flexible material; b. a pivotless magnetic head located integral with said strip for recording, or in the alternative, reading information from said memory device; c. vacuum means located along the end of said strip for forming a vacuum to load said head into proximity with the surface of said memory and for forming a dynamic air bearing under said strip, whereby head crash damage into said memory surface is prevented or minimized.

Claim 2

Dependent Claim 92 words

In a low mass flying head arrangement for use with a rotating memory device comprising: a. a cantilevered strip of flexible material; b. a pivotless magnetic head located integral with said strip for recording, or in the alternative, reading information from said memory device; c. vacuum means located along the end of said strip for forming a vacuum to load said head into proximity with the surface of said memory and for forming a dynamic air bearing under said strip, whereby head crash damage into said memory surface is prevented or minimized.

Claim 3

Dependent Claim 46 words

The low mass flying head in accordance with claim 1 wherein said vacuum means includes a chamber which provides maximum pressure points located approximately intermediate the respective corners of the trailing edge and a directly opposite corner of the vacuum chamber of said flying strip head.

Claim 4

Dependent Claim 29 words

The low mass flying head in accordance with claim 1 wherein said vacuum means includes a square vacuum chamber located along the trailing edge of said flying strip head.

Claim 5

Dependent Claim 31 words

The low mass flying head in accordance with claim 2 wherein switching means are connected to said vacuum means for switching a vacuum source alternatively on and off to said chamber.

Claim 6

Dependent Claim 41 words

The low mass flying head in accordance with claim 4 wherein a positive air source is additionally connected to said switching means, whereby said positive air source is utilized to withdraw said flying head from a position near said memory surface.

Claim 7

Independent Claim 91 words

The method of flying a low mass, thin flexible strip magnetic head over a high speed rotating memory surface comprising the steps of, a. forming said thin, flexible strip head into a cantilever; b. loading said head into close proximity to said memory surface by means of a vacuum formed along the trailing edge of said strip, said thin strip being flexed by said vacuum to form a hydrodynamic bearing between said strip and said memory surface, c. whereby head crash damage into said rotating memory surface is minimized or eliminated.

Claim 8

Independent Claim 91 words

The method of flying a low mass, thin flexible strip magnetic head over a high speed rotating memory surface comprising the steps of, a. forming said thin, flexible strip head into a cantilever; b. loading said head into close proximity to said memory surface by means of a vacuum formed along the trailing edge of said strip, said thin strip being flexed by said vacuum to form a hydrodynamic bearing between said strip and said memory surface, c. whereby head crash damage into said rotating memory surface is minimized or eliminated.

Claim 9

Dependent Claim 37 words

The method of flying a low mass magnetic strip head in accordance with claim 6 and including the step of a. unloading said magnetic head from said rotating memory surface by means of a positive pressure source.

Claim 10

Dependent Claim 36 words

The method of flying a low mass magnetic strip head in accordance with claim 6 and including the step of, a. forming a square, picture-frame shaped vacuum chamber in said strip head along said trailing edge.

Claim 11

Independent Claim 109 words

The method of flying a low mass, thin, flexible magnetic head over a rotating memory, which forms a boundry layer of air comprising, a. forming said thin strip into a cantilever; b. positioning said head upon the upper surface of said boundry layer; c. loading said head into close proximity of said memory and near the lower surface of said boundry layer by means of a vacuum formed along the trailing edge of said strip, said thin strip being flexed by said vacuum to form a hydrodynamic bearing between said strip and said memory surface, d. whereby head crash damage into said rotating memory surface is minimized or eliminated.

Claim 12

Independent Claim 109 words

The method of flying a low mass, thin, flexible magnetic head over a rotating memory, which forms a boundry layer of air comprising, a. forming said thin strip into a cantilever; b. positioning said head upon the upper surface of said boundry layer; c. loading said head into close proximity of said memory and near the lower surface of said boundry layer by means of a vacuum formed along the trailing edge of said strip, said thin strip being flexed by said vacuum to form a hydrodynamic bearing between said strip and said memory surface, d. whereby head crash damage into said rotating memory surface is minimized or eliminated.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-10-13	1979-04-14	1979-10-14	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-10-13	1983-04-14	1983-10-14	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-10-13	1987-04-14	1987-10-14	$7700.00	Window Closed / Lapsed

Flying magnetic strip head

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