Patent US2964449A successfully refreshed from Google Patents.
Patent US3757150A successfully refreshed from Google Patents.
US3757150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current traction motor
Assignee: Novi-P.B SA
•
Filing: 1972-02-29
•
Granted: 1973-09-04
•
Expires: 1992-02-29
Abstract
Abstract A direct current traction motor comprising a rotary armature consisting of a stack of slotted magnetic plates surrounded with a gap by a composite multipolar induction assembly wherein each pole comprises a core-mounted induction coil and a permanent induction magnet, the respective inductors of the poles thus forming two sets spaced equidistantly around the armature, either in fixed axially aligned relationship or in variable angular relationship as between one set and the other, and the axial distance between the coil and the magnet at each pole bearing a predetermined relationship to the gap between the armature and induction assembly.
Inventors
- 👤 J Benezech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:44
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/02; H02K23/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
118 words
A direct-current tractor motor comprising a rotatable armature composed along its entire length of magnetically permeable material, a series of multipolar inductors, each of the poles of said inductors including a first and second assembly, said first assembly comprising a core of magnetically permeable material and a coil, said second assembly comprising a ferrite magnetic material, a frame to support said armature for rotation and to mount the respective first and second assemblies of each of said inductors in alignment with each other in a direction transverse to the direction of rotation of the armature and disposed to establish a magnetic path between the respective first and second first and second assemblies of each pole through said armature.
Claim 2
Dependent Claim
118 words
A direct-current tractor motor comprising a rotatable armature composed along its entire length of magnetically permeable material, a series of multipolar inductors, each of the poles of said inductors including a first and second assembly, said first assembly comprising a core of magnetically permeable material and a coil, said second assembly comprising a ferrite magnetic material, a frame to support said armature for rotation and to mount the respective first and second assemblies of each of said inductors in alignment with each other in a direction transverse to the direction of rotation of the armature and disposed to establish a magnetic path between the respective first and second first and second assemblies of each pole through said armature.
Claim 3
Dependent Claim
24 words
A motor according to claim 1, wherein at each pole, the induction coil and the permanent induction magnet are aligned in the axial direction.
Claim 4
Dependent Claim
37 words
A traction motor according to claim 2, wherein each permanent induction magnet comprises a flat ferrite magnet fixed on the frame of the motor and terminated at the side of the said gap by a polar mass.
Claim 5
Dependent Claim
32 words
A motor according to claim 3, wherein the core of each induction coil has T-shaped longitudinal and transverse cross-sections, whereby to present a wider portion on the side of the said gap.
Claim 6
Dependent Claim
52 words
A motor according to claim 1, wherein the armature comprises an insulating disc carrying conductors, and the induction assembly is formed on the respective sides of this disc by two circular supports, concentric with the axis of the disc, and one carrying the induction coils and the other the permanent induction magnet.
Claim 7
Dependent Claim
20 words
A traction motor according to claim 1, wherein each induction coil comprises a series winding and a separate parallel winding.
Claim 8
Dependent Claim
18 words
A traction motor according to claim 1, wherein the winding of each induction coil is a series winding.
Claim 9
Dependent Claim
16 words
A motor according to claim 1, wherein the commutator brushes are set at the neutral line.
Claim 10
Dependent Claim
21 words
A motor according to claim 1, wherein the brushes are made from silver or like material having a low electrical resistance.
Claim 11
Dependent Claim
25 words
A motor according to claim 1, wherein means are provided for producing an angular displacement of the permanent induction magnets relative to the induction coils.
Claim 12
Dependent Claim
53 words
A motor according to claim 10, wherein the permanent induction magnets are mounted on a surface of revolution coaxial with the armature and inside of the frame of the motor, and wherein this surface of revolution has an angular position which may be varied relative to the induction coils fixed on the frame.
Claim 13
Dependent Claim
32 words
A motor according to claim 1, wherein the armature iron is divided longitudinally into two parts by means of insulating foils placed opposite the interval between two inductors of the same pole.
Claim 14
Dependent Claim
28 words
A motor according to claiM 1, wherein the frame of the motor includes a ring of non-magnetic material oposite the interval between two inductors of the same pole.
Claim 15
Dependent Claim
40 words
A motor according to claim 1, wherein the speed adjustment is carried out by means of an electronic ''''chopper'''' arrangement effective up to approximately 60 percent of the top speed, and by acting on the shunt winding above this percentage.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |