US3098679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passive control circuit for electrostatic bearing
Assignee: North American Aviation Corp
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Filing: 1961-08-02
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Granted: 1963-07-23
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Expires: 1981-08-02
Abstract
No abstract record available.
Inventors
- 👤 Boice William F De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:27
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/16; G01C19/24; Y; Y10; Y10T; Y10T74/00; Y10T74/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN AN ELECTROSTATIC BEARING CONTROL CIRCUIT FOR CONTROLLING THE SUPPORT OF A MEMBER BETWEEN AT LEAST A PAIR OF PLATES, MEANS FOR ESTABLISHING AN A.-C. POTENTIAL BETWEEN SAID PLATES AND SAID SUPPORTED MEMBER, SEPARATE INDUCTIVE MEANS FOR FORMING A RESONANT CIRCUIT WITH THE CAPACITANCE OF AN ASSOCIATED ONE OF SAID PLATES WHEN SAID ONE OF SAID PLATES IS FURTHER FROM SAID MEMBER THAN THE OTHER OF PLATES, AND MEANS INTERPOSED BETWEEN SAID MEANS FOR ESTABLISHING A POTENTIAL AND SAID INDUCTIVE MEANS FOR INTRODUCING AN ELECTRICAL PHASE LEAD INTO SAID CONTROL CIRCUIT.
Claim 2
Dependent Claim
91 words
IN AN ELECTROSTATIC BEARING CONTROL CIRCUIT FOR CONTROLLING THE SUPPORT OF A MEMBER BETWEEN AT LEAST A PAIR OF PLATES, MEANS FOR ESTABLISHING AN A.-C. POTENTIAL BETWEEN SAID PLATES AND SAID SUPPORTED MEMBER, SEPARATE INDUCTIVE MEANS FOR FORMING A RESONANT CIRCUIT WITH THE CAPACITANCE OF AN ASSOCIATED ONE OF SAID PLATES WHEN SAID ONE OF SAID PLATES IS FURTHER FROM SAID MEMBER THAN THE OTHER OF PLATES, AND MEANS INTERPOSED BETWEEN SAID MEANS FOR ESTABLISHING A POTENTIAL AND SAID INDUCTIVE MEANS FOR INTRODUCING AN ELECTRICAL PHASE LEAD INTO SAID CONTROL CIRCUIT.
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) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |