US3334949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic bearing
Assignee: North American Aviation Corp
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Filing: 1965-03-29
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Granted: 1967-08-08
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Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 James L Atkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:45
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0404; G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/16; G01C19/24; F16C2370/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
AN ELECTROSTATIC BEARING SUPPORT CIRCUIT FOR SUPPORTING A ROTATABLE MEMBER BETWEEN A PAIR OF ELECTRODES, COMPRISING, IN COMBINATION, ELECTROSTATIC SUPPORT MEANS FOR ESTABLISHING AN A.C. POTENTIAL BETWEEN SAID ROTATABLE MEMBER AND SAID ELECTRODES FOR ELECTROSTATICALLY SUPPORTING SAID ROTATABLE MEMBER, SENSING MEANS FOR PROVIDING AN A.C. POSITION SIGNAL WHICH VARIES AS A FUNCTION OF THE POSITION OF SAID ROTATABLE MEMBER WITH RESPECT TO SAID ELECTRODES, FIRST INDUCTANCE MEANS INDUCTIVELY COUPLING SAID SENSING MEANS TO SAID SUPPORT MEANS, SAID SENSING MEANS COMPRISING AN AMPLIFIER FOR AMPLIFYING SAID POSITION SIGNAL, SAID AMPLIFIER HAVING FIRST AND SECOND INPUT TERMINALS AND AN OUTPUT TERMINAL, SAID FIRST INDUCTANCE MEANS BEING OPERATIVELY COUPLED TO SAID SECOND INPUT TERMINAL, AND SECOND INDUCTANCE MEANS OPERATIVELY COUPLED VIA A COMMON TERMINAL TO SAID FIRST INDUCTANCE MEANS AND OPERATIVELY COUPLED TO SAID FIRST INPUT TERMINAL AND SAID OUTPUT TERMINAL TO PROVIDE A FIRST PREDETERMINED PORTION OF THE AMPLIFIED POSITION SIGNAL BETWEEN SAID COMMON TERMINAL AND SAID FIRST INPUT TERMINAL, AND TO PROVIDE A SECOND PREDETERMINED PORTION OF SAID AMPLIFIED POSITION SIGNAL BETWEEN SAID COMMON TERMINAL AND SAID SECOND INPUT TERMINAL, SAID FIRST AND SECOND PREDETERMINED PORTIONS BEING SUBSTANTIALLY EQUAL BUT OPPOSITE IN POLARITY.
Claim 2
Dependent Claim
192 words
AN ELECTROSTATIC BEARING SUPPORT CIRCUIT FOR SUPPORTING A ROTATABLE MEMBER BETWEEN A PAIR OF ELECTRODES, COMPRISING, IN COMBINATION, ELECTROSTATIC SUPPORT MEANS FOR ESTABLISHING AN A.C. POTENTIAL BETWEEN SAID ROTATABLE MEMBER AND SAID ELECTRODES FOR ELECTROSTATICALLY SUPPORTING SAID ROTATABLE MEMBER, SENSING MEANS FOR PROVIDING AN A.C. POSITION SIGNAL WHICH VARIES AS A FUNCTION OF THE POSITION OF SAID ROTATABLE MEMBER WITH RESPECT TO SAID ELECTRODES, FIRST INDUCTANCE MEANS INDUCTIVELY COUPLING SAID SENSING MEANS TO SAID SUPPORT MEANS, SAID SENSING MEANS COMPRISING AN AMPLIFIER FOR AMPLIFYING SAID POSITION SIGNAL, SAID AMPLIFIER HAVING FIRST AND SECOND INPUT TERMINALS AND AN OUTPUT TERMINAL, SAID FIRST INDUCTANCE MEANS BEING OPERATIVELY COUPLED TO SAID SECOND INPUT TERMINAL, AND SECOND INDUCTANCE MEANS OPERATIVELY COUPLED VIA A COMMON TERMINAL TO SAID FIRST INDUCTANCE MEANS AND OPERATIVELY COUPLED TO SAID FIRST INPUT TERMINAL AND SAID OUTPUT TERMINAL TO PROVIDE A FIRST PREDETERMINED PORTION OF THE AMPLIFIED POSITION SIGNAL BETWEEN SAID COMMON TERMINAL AND SAID FIRST INPUT TERMINAL, AND TO PROVIDE A SECOND PREDETERMINED PORTION OF SAID AMPLIFIED POSITION SIGNAL BETWEEN SAID COMMON TERMINAL AND SAID SECOND INPUT TERMINAL, SAID FIRST AND SECOND PREDETERMINED PORTIONS BEING SUBSTANTIALLY EQUAL BUT OPPOSITE IN POLARITY.
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) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |