US3639792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-generator
Assignee: ELECTRO CRAFT CORP
•
Filing: 1970-12-28
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Granted: 1972-02-01
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Expires: 1990-12-28
Abstract
Abstract The armatures and commutators of a DC motor and a DC generator are mounted coaxially on a common shaft with the two commutators being positioned adjacent to each other between the two armatures. The commutators are enclosed by a nonmagnetic housing containing brushes for making electrical contact therewith. Each of the armatures are enclosed by a corresponding housing containing field magnets therefor. The brushes are mounted in a fixed position on the nonmagnetic housing, and the housings containing field magnets are rotatably attached to opposite ends of the housing containing the brushes so that the field magnets can be aligned relative to their respective brushes for commutation along a neutral axis and for minimizing electromagnetic interaction between the motor and the generator.
Inventors
- 👤 Robert F Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:36
CPC Classifications
H; H02; H02K; H02K47/00; H02K47/12; H02K47/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
190 words
A motor/generator comprising a motor armature, a motor commutator, a generator armature, and a generator commutator mounted coaxially upon a common shaft with said commutators mounted adjacent to each other between said armatures, a commutator housing surrounding said commutators, said commutator housing being made of a nonmagnetic material, a plurality of brushes mounted in fixed positions on said commutator housing for making electrical contact with said commutators, a motor housing surrounding said motor armature, a motor field magnet attached to the interior of said motor housing, said motor housing and field magnet being attached to one end of said commutator housing and being rotatable with respect to said commutator housing so that the magnetic field of said field magnet can be angularly aligned with respect to said brushes, a generator housing surrounding said generator armature, a generator field magnet attached to the interior of said generator housing, said generator housing and field magnet being attached to the other end of said commutator housing and being rotatable with respect to said commutator housing so that the magnetic field of said field magnet can be angularly aligned with respect to said brushes.
Claim 2
Dependent Claim
190 words
A motor/generator comprising a motor armature, a motor commutator, a generator armature, and a generator commutator mounted coaxially upon a common shaft with said commutators mounted adjacent to each other between said armatures, a commutator housing surrounding said commutators, said commutator housing being made of a nonmagnetic material, a plurality of brushes mounted in fixed positions on said commutator housing for making electrical contact with said commutators, a motor housing surrounding said motor armature, a motor field magnet attached to the interior of said motor housing, said motor housing and field magnet being attached to one end of said commutator housing and being rotatable with respect to said commutator housing so that the magnetic field of said field magnet can be angularly aligned with respect to said brushes, a generator housing surrounding said generator armature, a generator field magnet attached to the interior of said generator housing, said generator housing and field magnet being attached to the other end of said commutator housing and being rotatable with respect to said commutator housing so that the magnetic field of said field magnet can be angularly aligned with respect to said brushes.
Claim 3
Dependent Claim
32 words
A motor/generator as defined in claim 1 wherein said motor commutator and generator commutator are symmetrically aligned with respect to each other to minimize electromagnetic interaction between the motor and generator circuits.
Claim 4
Dependent Claim
38 words
A motor/generator as defined in claim 2 wherein said plurality of brushes comprises at least two brushed for making electrical contact with said motor commutator and at least two brushes for making electrical contact with said generator armature.
Claim 5
Dependent Claim
34 words
A motor/generator as defined in claim 3 wherein said motor commutator brushes and generator commutator brushes are symmetrically aligned with respect to each other to minimize electromagnetic interaction between the motor and generator circuits.
Claim 6
Dependent Claim
32 words
A motor/generator as defined in claim 4 wherein said motor armature and generator armature are symmetrically aligned with respect to each other to minimize electromagnetic interaction between the motor and generator circuits.
Claim 7
Dependent Claim
60 words
A motor/generator as defined in claim 5 and also comprising means for applying a DC voltage across said motor brushes to induce rotation of said motor and generator armatures and thereby to develop a DC output voltage across said generator brushes, the polarity of said two DC voltages being arranged to minimize electromagnetic interaction between the motor and generator circuits.
Claim 8
Dependent Claim
43 words
A motor/generator as defined in claim 6 wherein said motor brushes and generator brushes are angularly aligned with each other and wherein the polarity of said DC voltages is arranged to produce current flow in opposite directions between adjacent motor and generator brushes.
Claim 9
Dependent Claim
16 words
A motor/generator as defined in claim 7 wherein said commutator housing is made of cast aluminum.
References Cited (Backward Citations)
US2800619A
Cited
US3114852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |