US3127592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static pickup head
Assignee: FREDERIC W OHNSTEAD
•
Filing: 1955-06-17
•
Granted: 1964-03-31
•
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 07:54
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.
References Cited (Backward Citations)
US1912167A
Cited
US2628539A
Cited
US2567812A
Cited
US2641656A
Cited
US2700703A
Cited
US2698427A
Cited
US2704789A
Cited
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 |