Patent US2249186A successfully refreshed from Google Patents.
Patent US3215901A successfully refreshed from Google Patents.
US3215901A
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Method and device for maintaining stationary position of a ferromagnetic body freelyfloating in electromagnetic field
Assignee: Tesla AS
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Filing: 1961-11-22
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Granted: 1965-11-02
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Expires: 1981-11-22
Abstract
No abstract record available.
Inventors
- 👤 Carniol Bohdan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:32
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; F16C32/0474; F16C32/0476; F16C32/0444; F16C32/0446; G; G05; G05F; G05F7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
AN APPARATUS FOR KEEPING A FERROMAGNETIC BODY FREELY SUSPENDED COMPRISING, IN COMBINATION: (A) ELECTROMAGNETIC MEANS ENERGIZABLE FOR GENERATING A MAGNETIC FIELD, AND FOR THEREBY MOVING A FERROMAGNETIC BODY TOWARD AND AWAY FROM A NORMAL POSITION; (B) SENSING MEANS RESPONSIVE TO THE SPACING OF SAID BODY FROM SAID NORMAL POSITION THEREOF, SAID SENSING MEANS INCLUDING (1) A CAPACITOR; (2) AN INDUCTOR IN PARALLEL LC CIRCUIT WITH SAID CAPACITOR, SAID LC CIRCUIT HAVING A PREDETERMINED RESONANT FREQUENCY, AND (3) PULSE GENERATOR MEANS CONNECTED TO SAID LC CIRCUIT FOR FEEDING THERETO REPETITIVE ELECTRIC PULSES OF PREDETERMINED AMPLITUDE AT A FREQUENCY SMALLER THAN SAID RESONANT FREQUENCY, WHEREBY A SEQUENCE OF DAMPED VOLTAGE OSCILLATIONS IS GENERATED BY EACH OF SAID PULSES IN SAID LC CIRCUIT,
Claim 2
Independent Claim
120 words
AN APPARATUS FOR KEEPING A FERROMAGNETIC BODY FREELY SUSPENDED COMPRISING, IN COMBINATION: (A) ELECTROMAGNETIC MEANS ENERGIZABLE FOR GENERATING A MAGNETIC FIELD, AND FOR THEREBY MOVING A FERROMAGNETIC BODY TOWARD AND AWAY FROM A NORMAL POSITION; (B) SENSING MEANS RESPONSIVE TO THE SPACING OF SAID BODY FROM SAID NORMAL POSITION THEREOF, SAID SENSING MEANS INCLUDING (1) A CAPACITOR; (2) AN INDUCTOR IN PARALLEL LC CIRCUIT WITH SAID CAPACITOR, SAID LC CIRCUIT HAVING A PREDETERMINED RESONANT FREQUENCY, AND (3) PULSE GENERATOR MEANS CONNECTED TO SAID LC CIRCUIT FOR FEEDING THERETO REPETITIVE ELECTRIC PULSES OF PREDETERMINED AMPLITUDE AT A FREQUENCY SMALLER THAN SAID RESONANT FREQUENCY, WHEREBY A SEQUENCE OF DAMPED VOLTAGE OSCILLATIONS IS GENERATED BY EACH OF SAID PULSES IN SAID LC 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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |