Patent US3964479A successfully refreshed from Google Patents.
US3105964A
Expired / Lapsed
US
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Magnetic head positioning system
Assignee: Unisys Corp
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Filing: 1960-02-01
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Granted: 1963-10-01
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Expires: 1980-02-01
Abstract
No abstract record available.
Inventors
- 👤 Franz X Kanamuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:23
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005; G11B5/004; G11B5/40; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18856
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
166 words
A MECHANISM FOR LOWERING AND RAISING A HEAD MEMBER WITH RESPECT TO A DRUM COMPRISING A CARRIAGE FOR CARRYING SAID HEAD MEMBER OVER A SELECTED PORTION OF SAID DRUM, AN ASSEMBLY FOR PIVOTALLY HOLDING SAID HEAD MEMBER, MEANS FOR ADJUSTING THE ANGLE AND PARALLEL RELATIONSHIP OF SAID HEAD MEMBER WITH RESPECT TO SAID ASSEMBLY, A LINKAGE MECHANISM CONNECTED BETWEEN SAID ASSEMBLY AND SAID CARRIAGE, MEANS FOR ACTUATING SAID LINKAGE MECHANISM TO LOWER OR RAISE SAID HEAD MEMBER WITH RESPECT TO SAID DRUM, BIASING MEANS INCLUDED IN SAID LINKAGE MECHANISM DISPOSED TO EXERT A PRESSURE AGAINST SAID HEAD MEMBER TO MAINTAIN SAID HEAD MEMBER SUBSTANTIALLY AT SAID ADJUSTED ANGLE WITH RESPECT TO SAID ASSEMBLY WHEN SAID HEAD MEMBER IS BEING LOWERED TOWARD OR RAISED AWAY FROM SAID DRUM, AND MEANS FOR REMOVING PRESSURE PROVIDED BY SAIDBBIASING MEANS FROM SAID HEAD MEMBER WHEN SAID HEAD MEMBER IS IN A LOWERED POSITION WITH RESPECT TO SAID DRUM TO PERMIT SAID HEAD MEMBER TO BE PIVOTALLY MOVED WITHIN SAID ASSEMBLY.
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) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |