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Patent US3399002A successfully refreshed from Google Patents.
US3399002A
Expired / Lapsed
US
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Electrostatic support system
Assignee: Boeing North American Inc
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Filing: 1966-02-16
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Granted: 1968-08-27
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Expires: 1986-02-16
Abstract
No abstract record available.
Inventors
- 👤 James L Atkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:14
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/16; G01C19/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
AN ELECTROSTATIC SUPPORT SYSTEM FOR SUPPORTING A MEMBER BETWEEN PAIRS OF ELECTRODES COMPRISING IN COMBINATION: ELECTROSTATIC SUPPORT MEANS ESTABLISHING AN A.C. POTENTIAL BETWEEN SAID MEMBER AND SAID ELECTRODES; SENSING MEANS PROVIDING AN A.C. POSITION SIGNAL WHICH IS MODULATED AS A FUNCTION OF THE DISPLACEMENT OF SAID MEMBER WITH RESPECT TO SAID ELECTRODES; A DEMODULATOR DEMODULATING SAID POSITION SIGNAL PROVIDING A D.C. SIGNAL HAVING A POLARITY AND AMPLITUDE INDICATIVE OF THE DISPLACEMENT OF SAID MEMBER WITH RESPECT TO SAID ELECTRODES; AND A SIGNAL MIXER MEANS RECEIVING AS AN INPUT SAID D.C. SIGNAL AND PROVIDING TO SAID ELECTRODES A SIGNAL THAT IS A FIRST FUNCTION OF DISPLACEMENT WHEN SAID DISPLACEMENT IS BELOW A PREDETERMINED VALUE AND PROVIDING A SIGNAL THAT IS A SECOND FUNCTION OF DISPLACEMENT WHEN SAID DISPLACEMENT IS ABOVE SAID PREDETERMINED VALUE.
Claim 2
Dependent Claim
132 words
AN ELECTROSTATIC SUPPORT SYSTEM FOR SUPPORTING A MEMBER BETWEEN PAIRS OF ELECTRODES COMPRISING IN COMBINATION: ELECTROSTATIC SUPPORT MEANS ESTABLISHING AN A.C. POTENTIAL BETWEEN SAID MEMBER AND SAID ELECTRODES; SENSING MEANS PROVIDING AN A.C. POSITION SIGNAL WHICH IS MODULATED AS A FUNCTION OF THE DISPLACEMENT OF SAID MEMBER WITH RESPECT TO SAID ELECTRODES; A DEMODULATOR DEMODULATING SAID POSITION SIGNAL PROVIDING A D.C. SIGNAL HAVING A POLARITY AND AMPLITUDE INDICATIVE OF THE DISPLACEMENT OF SAID MEMBER WITH RESPECT TO SAID ELECTRODES; AND A SIGNAL MIXER MEANS RECEIVING AS AN INPUT SAID D.C. SIGNAL AND PROVIDING TO SAID ELECTRODES A SIGNAL THAT IS A FIRST FUNCTION OF DISPLACEMENT WHEN SAID DISPLACEMENT IS BELOW A PREDETERMINED VALUE AND PROVIDING A SIGNAL THAT IS A SECOND FUNCTION OF DISPLACEMENT WHEN SAID DISPLACEMENT IS ABOVE SAID PREDETERMINED VALUE.
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) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |