Patent US3127592A successfully refreshed from Google Patents.
US3127592A
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US
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Static pickup head
Assignee: FREDERIC W OHNSTEAD
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Filing: 1955-06-17
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Granted: 1964-03-31
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Expires: 1975-06-17
Abstract
No abstract record available.
Inventors
- 👤 Company The Northern Trust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:41
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/49; G11B5/4907; G01; G01D; G01D5/00; G01D5/12; G01D5/243; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/12; G05B19/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PICKUP ASSEMBLY FOR USE WITH MAGNETIC STORAGE MEMBERS INCLUDING A MAGNETIC STORAGE MEMBER HAVING AN AREA THEREON OF PREDETERMINED MAGNETIC CHARACTERISTICS AND ADAPTED TO EMIT FLUX, MEANS ESTABLISHING A FLUX PATH FROM SAID MAGNETIC STORAGE MEMBER TO AN INDUCTION ELEMENT, AND MEANS FOR VARYING IN A CYCLIC MANNER THE FLUX IN SAID PATH INCLUDING A PLURALITY OF SPACED FLUX CONDUCTIVE MEMBERS POSITIONED ADJACENT SAID PATH, ONE OF SAID FLUX CONDUCTIVE MEMBERS BEING NEARER TO SAID AREA THAN THE OTHERS, AND MEANS FOR SUPPLYING A CYCLICALLY VARYING VOLTAGE TO EACH OF SAID FLUX CONDUCTIVE MEMBERS WITH THE VOLTAGE SUPPLIED TO EACH INDIVIDUAL MEMBER BEING OUT OF PHASE WITH THE VOLTAGE SUPPLIED TO THE OTHERS.
Claim 2
Dependent Claim
114 words
A PICKUP ASSEMBLY FOR USE WITH MAGNETIC STORAGE MEMBERS INCLUDING A MAGNETIC STORAGE MEMBER HAVING AN AREA THEREON OF PREDETERMINED MAGNETIC CHARACTERISTICS AND ADAPTED TO EMIT FLUX, MEANS ESTABLISHING A FLUX PATH FROM SAID MAGNETIC STORAGE MEMBER TO AN INDUCTION ELEMENT, AND MEANS FOR VARYING IN A CYCLIC MANNER THE FLUX IN SAID PATH INCLUDING A PLURALITY OF SPACED FLUX CONDUCTIVE MEMBERS POSITIONED ADJACENT SAID PATH, ONE OF SAID FLUX CONDUCTIVE MEMBERS BEING NEARER TO SAID AREA THAN THE OTHERS, AND MEANS FOR SUPPLYING A CYCLICALLY VARYING VOLTAGE TO EACH OF SAID FLUX CONDUCTIVE MEMBERS WITH THE VOLTAGE SUPPLIED TO EACH INDIVIDUAL MEMBER BEING OUT OF PHASE WITH THE VOLTAGE SUPPLIED TO THE OTHERS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |