US3579005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homopolar dynamoelectric apparatus
Assignee: Individual
•
Filing: 1969-07-25
•
Granted: 1971-05-18
•
Expires: 1989-07-25
Abstract
Abstract A homopolar dynamoelectric apparatus wherein a field structure is formed with alternately spaced segments of high and low magnetic permeability adjacent a rotating conductive armature for inhibiting undesirable rotation of magnetic flux therewith. The armature is constructed with a plurality of individual sections each adapted to generate a separate voltage potential which may be electrically added to the outputs of each of the other armature sections to produce a resultant output voltage substantially higher than the low output potentials heretofore characteristic of homopolar devices.
Inventors
- 👤 Bruce P Noble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:03
CPC Classifications
H; H02; H02K; H02K31/00; H02K31/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
81 words
A homopolar dynamoelectric apparatus comprising, an electric current conducting annular armature mounted for rotation about its axis, an annular field structure mounted concentrically with said armature and having opposed pole faces on opposite sides of and disposed normally to said armature and circumferentially thereabout, said structure being formed with circumferentially alternately spaced regions of relatively high and low magnetic permeability adjacent said armature for inhibiting rotation of magnetic flux with said armature, and electric current conducting means connected to said armature.
Claim 2
Dependent Claim
81 words
A homopolar dynamoelectric apparatus comprising, an electric current conducting annular armature mounted for rotation about its axis, an annular field structure mounted concentrically with said armature and having opposed pole faces on opposite sides of and disposed normally to said armature and circumferentially thereabout, said structure being formed with circumferentially alternately spaced regions of relatively high and low magnetic permeability adjacent said armature for inhibiting rotation of magnetic flux with said armature, and electric current conducting means connected to said armature.
Claim 3
Dependent Claim
52 words
An apparatus as defined in claim 1, wherein said field structure comprises two radially spaced pairs of concentric cylindrical pole faces, said armature comprising a pair of hollow cylindrical members concentrically mounted for joint rotation between said pole faces, and said regions of low magnetic permeability being positioned circumferentially around said members.
Claim 4
Dependent Claim
57 words
An apparatus as defined in claim 2, wherein said members are formed of electrically nonconducting material, a plurality of electrical conductors carried by said members and extending to the axially opposed ends thereof, current conducting rings mounted on said ends and connected to said conductors, and said current conducting means comprising brushes slidably engaged with said rings.
Claim 5
Dependent Claim
27 words
An apparatus as defined in claim 3, wherein the brushes for each of said members are positioned substantially 180* apart relative to the circumference of the member.
Claim 6
Dependent Claim
82 words
An apparatus as defined in claim 2, wherein said field structure comprises a second set of radially spaced pairs of concentric cylindrical pole faces coaxially aligned with said first named pole faces, and said armature comprises a second pair of hollow cylindrical members concentrically mounted for joint rotation with said first named members and posiTioned between said second set of pole faces, said structure being formed with said pole faces cofunctioning to provide a common magnetic path intercepting all of said members.
Claim 7
Dependent Claim
54 words
An apparatus as defined in claim 5, wherein said field structure is disposed at the adjacent ends of said members, and additional field structures disposed at the remote ends of said members and each comprising radially spaced pairs of concentric cylindrical pole faces positioned interiorly and exteriorly of said members adjacent their remote ends.
Claim 8
Dependent Claim
55 words
An apparatus as defined in claim 6, a shaft journaled for rotation coaxially with said members, electrically nonconducting means supporting said members for joint rotation with said shaft with said members extending bilaterally from said means, and said field structure being formed with cylindrical recesses between opposed pole faces receiving end portions of said members.
Claim 9
Dependent Claim
39 words
An apparatus as defined in claim 1, wherein said structure regions of high magnetic permeability are formed of ferromagnetic material and said regions of low permeability are provided by cavities formed in said structure and bounded by said material.
Claim 10
Dependent Claim
59 words
An apparatus as defined in claim 2, wherein said structure is composed of a ferromagnetic material and is formed with a plurality of cavities circumferentially spaced and positioned between said members axially coextensive with said pole faces, whereby said material provides said regions of high permeability and said cavities bounded by said material provide said regions of low permeability.
Claim 11
Dependent Claim
21 words
An apparatus as defined in claim 9, electrically conductive means carried by said cavities for further inhibiting rotation of magnetic flux.
Claim 12
Dependent Claim
43 words
An apparatus as defined in claim 1, said field structure comprising, a plurality of circumferentially spaced electromagnetic field coils each having a central flux axis extending perpendicularly to the direction of rotation of said armature and providing a component of said magnetic flux.
Claim 13
Dependent Claim
94 words
An apparatus as defined in claim 2, said field structure comprising, a first plurality of electromagnetic field coils circumferentially spaced adjacent the radially outer said member, a second plurality of electromagnetic field coils circumferentially spaced adjacent the radially inner said member, said coils each having a central flux axis extending perpendicular to the direction of rotation of said members and magnetic core means connecting the central axes of said coils with said pole faces and providing said regions of high permeability circumferentially spaced by low permeability regions formed by the windings of said coils.
Claim 14
Dependent Claim
50 words
An apparatus as defined in claim 3, wherein said conductors carried by said members are arranged with axially central portions circumferentially trailing axial end portions relative to the direction of rotation of said members, whereby magnetic flux is drawn toward said axially central portions of said conductors and traversed thereby.
Claim 15
Dependent Claim
23 words
An apparatus as defined in claim 13, wherein said end portions of said conductors converge circumferentially axially inwardly to said conductor central portions.
Claim 16
Dependent Claim
35 words
An apparatus as defined in claim 2, wherein said field structure is comprised of an annular permanent magnet carrying said pole faces, and an electromagnetic field coil disposed in flux coincident relation with said magnet.
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |