US4315178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current motor with non-superposed armature windings
Assignee: Individual
•
Filing: 1980-05-05
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Granted: 1982-02-09
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Expires: 2000-05-05
Abstract
Abstract A direct current motor is provided with a field magnet having l(2m+2n) alternating N and S poles (l and m being positive integers of one or more and n being a positive integer of two or more) that are magnetized within segments of equiangular width about the field magnet, a magnetic-material member for closing the magnetic path of the field magnet, and an armature having l(2n-1) armature windings distributed thereon in a non-superposed manner with respect to each other and in a face-to-face relationship with respect to the field magnet poles, each winding having an angular spacing between those conductor portions thereof that contribute to the generation of the torque that is equal to the angular width of a field magnet pole.
Inventors
- 👤 Itsuki Ban
- 👤 Manabu Shiraki
- 👤 Kazuhito Egami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:29
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
135 words
A direct current motor having armature windings that are non-superposed with respect to each other comprising: a field magnet having l(2m+2n) poles that are magnetized into alternate N and S polarities in equal angular spaces wherein l and m are positive integers of 1 or more and n is a positive integer of 2 or more; a magnetic-material member for closing the magnetic path of said field magnet; and an armature having l(2n-1) armature windings disposed thereon within said magnetic path in a non-superposed manner with respect to each other and in a face-to-face relationship with respect to said field magnet poles, said windings each being formed such that the angular spacing of those conductor portions thereof that contribute to the generation of torque is equal to the angular width of said field magnet poles.
Claim 2
Dependent Claim
135 words
A direct current motor having armature windings that are non-superposed with respect to each other comprising: a field magnet having l(2m+2n) poles that are magnetized into alternate N and S polarities in equal angular spaces wherein l and m are positive integers of 1 or more and n is a positive integer of 2 or more; a magnetic-material member for closing the magnetic path of said field magnet; and an armature having l(2n-1) armature windings disposed thereon within said magnetic path in a non-superposed manner with respect to each other and in a face-to-face relationship with respect to said field magnet poles, said windings each being formed such that the angular spacing of those conductor portions thereof that contribute to the generation of torque is equal to the angular width of said field magnet poles.
Claim 3
Dependent Claim
103 words
A direct current motor according to claim 1 wherein terminals of said l(2n-1) armature windings are connected to corresponding ones of l(m+n)(2n-1) commutator segments which are interconnected in common l(m+n) by l(m+n), further including brushes in sliding contact with said commutator segments for supplying current to said armature windings from a positive and a negative terminals of a direct current supply source, and said brushes, which contact respectively with ones of said commutator segments, are angularly spaced from each other by 360°/l(2m+2n) or by an angle between the commutator segments which are interconnected respectively in common with said ones of the commutator segments.
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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) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |