US3760205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-reluctance electrical generator
Assignee: Individual
•
Filing: 1972-09-11
•
Granted: 1973-09-18
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Expires: 1992-09-11
Abstract
Abstract An electrical generator particularly designed to generate high voltages is disclosed. The generator includes an induction coil and a driven rotor associated with the coil and a curvilinear, spirally or helically-shaped band made of ferromagnetic material provided on the surface of the rotor. A magnet is provided which produces a magnetic field. The terminal sections of the ferromagnetic band which envelop a section of the induction coil are positioned opposite to the North and South poles of the magnet and the ferromagnetic band is so proportioned and affixed that the maximum effective band length for transmitting continuous magnetic flux to the induction coil, measured in degrees of angle, is 720*, and the minimum effective band length is 360*. The width of the poles and the gap between the poles are of such a dimension that when the ferromagnetic band turns through half a revolution the effective band length for the magnetic flux is changed by 360*.
Inventors
- 👤 P Imris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:02
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10; H02; H02K; H02K21/00; H02K21/38; H02K99/00; H02K99/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
An electric generator comprising: a. an induction coil having a plurality of windings and extending in a closed loop about an opening; b. an elongated body of ferromagnetic material extending about a section of said loop in a plurality of spaced turns transverse to said windings and passing through said opening; c. magnet means for inducing longitudinal magnetic flux in a longitudinal portion of said body constituting said turns; and d. operating means for cyclically varying the length of said portion.
Claim 2
Dependent Claim
81 words
An electric generator comprising: a. an induction coil having a plurality of windings and extending in a closed loop about an opening; b. an elongated body of ferromagnetic material extending about a section of said loop in a plurality of spaced turns transverse to said windings and passing through said opening; c. magnet means for inducing longitudinal magnetic flux in a longitudinal portion of said body constituting said turns; and d. operating means for cyclically varying the length of said portion.
Claim 3
Dependent Claim
86 words
A generator as set forth in claim 1, wherein said turns define a surface of circular cross section about an axis, said magnet means include two pole pieces, means for imparting opposite magnetic polarity to said pole pieces, mounting means mounting said pole pieces at respective fixed radial distances relative to said axis from said surface, respective longitudinal portions of said body being nearest said two pole pieces, and said operating means include means for varying the axial spacing of said nearest portions from each other.
Claim 4
Dependent Claim
41 words
A generator as set forth in claim 2, wherein said mounting means include means for holding said pole pieces in respective fixed axial positions, and said means for varying said axial spacing include means for rotating said body about said axis.
Claim 5
Dependent Claim
47 words
A generator as set forth in claim 3, wherein said turns extend in a continuous helix about said axis, said pole pieces are spaced from said axis in a common radial direction, and said operating means hold said body in a fixed axial position during said rotating.
Claim 6
Dependent Claim
30 words
A generator as set forth in claim 1, further comprising a container enveloping said coil, and a body of liquid insulating material in said casing, said turns enveloping said container.
Claim 7
Dependent Claim
24 words
A generator as set forth in claim 5, wherein said operating means include means for rotating said body about said section of said loop.
Claim 8
Dependent Claim
103 words
A geerator as set forth in claim 4, wherein said spaced turns extend in a helix about an axis, said body is a band having a longtudinally continuous face in a cylindrical surface about said axis, the number of said turns is at least two, said magnet means including two pole pieces, means for imparting opposite magnetic polarity to said pole pieces, mounting means mounting said pole pieces in axially spaced axial alignment at respective fixed radial distances from said cylindrical surface, said operating means including means for rotating said body about said axis relative to said pole pieces and to said coil.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |