US3885131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-bearing data transfer system
Assignee: Dynell Electronics Corp
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Filing: 1973-04-13
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Granted: 1975-05-20
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Expires: 1993-04-13
Abstract
Abstract There is disclosed an air-bearing data transfer system in which the data transfer head operates in extremely close proximity to the data-storing surface, the head being brought to the surface by an adjustable but relatively unyielding mount only after high relative motion is established and with force normal to the surface sufficient to cause the surface to deform in an amount in excess of its normal run-out, the head being pivotally mounted in its roll-and-pitch axis to accommodate the geometry of the continuously deformed surface.
Inventors
- 👤 John B Franceschini
- 👤 Leonard Meltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:08
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/048; G06; G06K; G06K7/00; G06K7/01; G06K7/015; G11B; G11B21/00; G11B21/16; G11B21/20; G11B7/00; G11B7/08; G11B7/09; G11B7/095; G11B7/0956
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
155 words
In an air-bearing data-transfer system, a rotary member having a data-storage face and having an inherent run-out error in rotation causing recurrent reciprocating movement in a direction perpendicular to said face with each rotation, said member being resiliently deformable in a direction perpendicular to said face, a data-transfer head having an air-bearing surface opposing the storage face and having a geometry compatible therewith to establish an air bearing therebetween, control means to move the record and data-transfer head into close proximity to establish the air bearing between the surfaces when rotary motion obtains and to establish further movement in the perpendicular direction to deform the record opposite the air bearing by an amount exceeding the run-out error, and anchoring means having a resilience less than that of the data-storage face to maintain the data-transfer head continuously in said record-deforming position, whereby a fixed predetermined spacing is established between the data-transfer head and the data-storage face.
Claim 2
Dependent Claim
155 words
In an air-bearing data-transfer system, a rotary member having a data-storage face and having an inherent run-out error in rotation causing recurrent reciprocating movement in a direction perpendicular to said face with each rotation, said member being resiliently deformable in a direction perpendicular to said face, a data-transfer head having an air-bearing surface opposing the storage face and having a geometry compatible therewith to establish an air bearing therebetween, control means to move the record and data-transfer head into close proximity to establish the air bearing between the surfaces when rotary motion obtains and to establish further movement in the perpendicular direction to deform the record opposite the air bearing by an amount exceeding the run-out error, and anchoring means having a resilience less than that of the data-storage face to maintain the data-transfer head continuously in said record-deforming position, whereby a fixed predetermined spacing is established between the data-transfer head and the data-storage face.
Claim 3
Dependent Claim
55 words
A data-transfer system as set forth in claim 1, said record comprising a disc rotatable about a perpendicular axis coupled to its center, said data-transfer head having a substantially flat air-bearing surface opposing the surface of the disc and disposed eccentrically with respect thereto to deform the disc by bending it beyond the run-out error.
Claim 4
Dependent Claim
54 words
A data-transfer system as set forth in claim 1, said data-transfer head being movable toward and away from said record, said control means being coupled to the data-transfer head and including adjustable means to selectively position the air-bearing surface over a range of distances approaching and beyond the unstressed run-out of the data-storage face.
Claim 5
Dependent Claim
42 words
A data-transfer system as set forth in claim 3, said control means including a single-point contact thrust pin engaging the data-transfer head closer to its trailing edge than its leading edge in the direction of relative movement with respect to the record.
Claim 6
Dependent Claim
43 words
A data-transfer system as set forth in claim 4, including a supplemental resilient support for the data-transfer head affording pivotal movement about the thrust pin to accomodate pitch-and-roll movement, and means to preclude yaw movement about an axis perpendicular to the data-storage face.
Claim 7
Dependent Claim
40 words
A data-transfer system as set forth in claim 4, said data-transfer head having a recess formed in the back surface thereof to receive said thrust pin and to establish engagement therewith at a point close to the air-bearing surface thereof.
Claim 8
Dependent Claim
161 words
A data-transfer head assembly comprising a body portion, an air bearing on one surface thereof, a thrust pin pivotally engaging the body in a direct coupling to impart thrust perpendicular to the air bearing, a supplementary resilient support for the body affording pivotal movement about the tip of the thrust pin about tHe roll-and-pitch axis of the air bearing comprising a spring member coupled to the pivot pin and affording torsional resilience and bending resilience in one plane, said spring member extending in a direction radially away from the pin, and a relatively rigid member coupling the end of the spring remote from the pivot to the data transfer body, said supplementary resilient support also including restraining means to preclude yaw movement about the axis of the pin, a plurality of radiation responsive members mounted in a transverse row on said body, a radiation mask covering the members, and means forming a radiation-permeable slot in the mask along the transverse row.
Claim 9
Dependent Claim
161 words
A data-transfer head assembly comprising a body portion, an air bearing on one surface thereof, a thrust pin pivotally engaging the body in a direct coupling to impart thrust perpendicular to the air bearing, a supplementary resilient support for the body affording pivotal movement about the tip of the thrust pin about tHe roll-and-pitch axis of the air bearing comprising a spring member coupled to the pivot pin and affording torsional resilience and bending resilience in one plane, said spring member extending in a direction radially away from the pin, and a relatively rigid member coupling the end of the spring remote from the pivot to the data transfer body, said supplementary resilient support also including restraining means to preclude yaw movement about the axis of the pin, a plurality of radiation responsive members mounted in a transverse row on said body, a radiation mask covering the members, and means forming a radiation-permeable slot in the mask along the transverse row.
Claim 10
Dependent Claim
155 words
In a method for establishing an air-film barrier of substantially uniform thickness between a data-transfer head and a relatively movable data-storing record of resilient structure and having a surface contour conforming to that of the data-transfer head to define an air bearing therebetween when the faces are in close proximity, the steps of establishing relative movement between the data-transfer head and the record in the plane of the air bearing with the two elements relatively widely spaced apart, determining the amount of change of spacing due to run-out error between the air bearing and the record in a direction perpendicular to the opposed surfaces while they are parted, pressing the head and record together to establish an air bearing therebetween and further pressing the two together to deform the record by an amount in excess of the change of spacing due to run-out error, and securing the head against movement perpendicularly away from the record.
Claim 11
Dependent Claim
155 words
In a method for establishing an air-film barrier of substantially uniform thickness between a data-transfer head and a relatively movable data-storing record of resilient structure and having a surface contour conforming to that of the data-transfer head to define an air bearing therebetween when the faces are in close proximity, the steps of establishing relative movement between the data-transfer head and the record in the plane of the air bearing with the two elements relatively widely spaced apart, determining the amount of change of spacing due to run-out error between the air bearing and the record in a direction perpendicular to the opposed surfaces while they are parted, pressing the head and record together to establish an air bearing therebetween and further pressing the two together to deform the record by an amount in excess of the change of spacing due to run-out error, and securing the head against movement perpendicularly away from the record.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |