US3705397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-adjusting supporting member having a magnetic head
Assignee: US Philips Corp
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Filing: 1970-10-30
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Granted: 1972-12-05
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Expires: 1990-10-30
Abstract
Abstract In hydrodynamically operating suspension devices which have for their object to keep a magnetic head at a constant distance from a rotating memory disk, the magnetic head was so far incorporated in the lower side of a flexible rubber or plastic box. The head is now incorporated in a diaphragm of a ductile metal. A diaphragm with incorporated head is manufactured by pressing the head on a polished mould, by the electroless and/or electrolytic deposition of metal on the sides of the head and the adjoining part of the mould, and finally by stripping the assembly from the mould.
Inventors
- 👤 Jan T Gerkema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:59
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
A self-adjusting supporting member including at least One magnetic head having an operative surface and serving to maintain the magnetic head a constant distance from a relatively moving recording medium, said support member comprising an extremely thin walled flexible metallic diaphragm of approximately 1 to 10 microns in thickness facing said recording medium, said diaphragm molecularly bonded directly to said head with the operative surface thereof exposed through said support member to said recording medium.
Claim 2
Dependent Claim
75 words
A self-adjusting supporting member including at least One magnetic head having an operative surface and serving to maintain the magnetic head a constant distance from a relatively moving recording medium, said support member comprising an extremely thin walled flexible metallic diaphragm of approximately 1 to 10 microns in thickness facing said recording medium, said diaphragm molecularly bonded directly to said head with the operative surface thereof exposed through said support member to said recording medium.
Claim 3
Dependent Claim
31 words
A self-adjusting supporting member as claimed in claim 1, wherein said operative surface of the magnetic head and the flexible part of the supporting member are accurately located in one plane.
Claim 4
Dependent Claim
31 words
A self-adjusting supporting member as claimed in claim 1, wherein said operative surface of the magnetic head projects over an accurately determined distance from the flexible part of the supporting member.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |