Patent US3705995A successfully refreshed from Google Patents.
US3705995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homopolar machine with multiple discs and a short inductor
Assignee: Individual
•
Filing: 1971-11-29
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Granted: 1972-12-12
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Expires: 1991-11-29
Abstract
Abstract HOMOPOLAR MACHINES WITH MULTIPLE DISCS AND A SHORT INDUCTOR. THE HOMOPOLAR MACHINE HAS IN COMBINATION WITH THE SHORT INDUCTOR DISCS AND COUNTER DISCS WHICH DECREASE IN THICKNESS FROM THE CENTER TOWARD THE PERIPHERY THEREOF, THE THICKNESS AT THE PERIPHERY BEING EQUAL TO THE THICKNESS AT THE CENTER REDUCED IN INVERSE PROPORTION TO THE CORRESPONDING RADIUS THEREBETWEEN. THE INDUCTOR IS PREFERABLY OF THE SUPERCONDUCTOR TYPE, AND ITS INNER SURFACE IS AT LEAST IN PART OF A TOROIDAL CONFIGURATION. THE SLIDING CONTACTS ARE PREFERABLY MADE BY FILLING THE MACHINE WITH A LIQUID METAL, AND ONE OR MORE OF THE CONTACT SURFACES MAY BE TRUNCATED TO FACILITATE ASSEMBLY OF THE MACHINE.
Inventors
- 👤 Jean-Pierre Chabrerie
- 👤 Alain Jacques Mailfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:13
CPC Classifications
H; H02; H02K; H02K31/00; H02K31/04
Claims Analysis
Total Claims: 0
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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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |