US4316112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electricity generator
Assignee: Department of Productivity
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Filing: 1979-05-10
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Granted: 1982-02-16
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Expires: 1999-05-10
Abstract
Abstract An inductor alternator having a stator formed from an annular yoke with laminated pole pieces secured to the internal periphery thereof by welding through slots in the yoke. The rectifiers for rectifying the alternating current are located in a detachable compartment at one end of the housing containing the stator. The rotor is journaled within the stator by bearings supported in said detachable compartment.
Inventors
- 👤 John M. Waldron
- 👤 Frederick J. Nott
- 👤 Laurence C. Harrison
- 👤 Graham D. Johnson
- 👤 Malcolm D. Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:59
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/22; H02K19/24; H02K11/00; H02K11/04; H02K11/049; H02K11/05; H02K19/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
200 words
An electrical generator of the inductor-alternator type comprising a stator in the form of an annular magnetic core assembly, a rotor coaxially mounted for rotation within said stator, said core assembly having a plurality of parallel lengthwise slots defined about the inner periphery thereof, field and armature windings of said generator being mounted in said slots, said core assembly comprising an outer annular yoke formed from material having a high magnetic permeability and a plurality of separate lengthwise extending stacks of laminations of material having high magnetic permeability arrayed about the inner periphery of said annular yoke, said stacks being spaced apart from each other in the circumferential direction of said core assembly so as to form a plurality of lengthwise extending slots therebetween extending from the inner peripheries of adjacent pairs of stacks to the inner periphery of said yoke for receiving said field windings, said yoke having a plurality of parallel lengthwise extending slots therethrough in alignment with said stacks whereby said slots are covered at the inner periphery of said yoke by the outer peripheries of said stacks, and said stacks being affixed to said yoke by welds disposed within the lengthwise extending slots in said yoke.
Claim 2
Dependent Claim
200 words
An electrical generator of the inductor-alternator type comprising a stator in the form of an annular magnetic core assembly, a rotor coaxially mounted for rotation within said stator, said core assembly having a plurality of parallel lengthwise slots defined about the inner periphery thereof, field and armature windings of said generator being mounted in said slots, said core assembly comprising an outer annular yoke formed from material having a high magnetic permeability and a plurality of separate lengthwise extending stacks of laminations of material having high magnetic permeability arrayed about the inner periphery of said annular yoke, said stacks being spaced apart from each other in the circumferential direction of said core assembly so as to form a plurality of lengthwise extending slots therebetween extending from the inner peripheries of adjacent pairs of stacks to the inner periphery of said yoke for receiving said field windings, said yoke having a plurality of parallel lengthwise extending slots therethrough in alignment with said stacks whereby said slots are covered at the inner periphery of said yoke by the outer peripheries of said stacks, and said stacks being affixed to said yoke by welds disposed within the lengthwise extending slots in said yoke.
Claim 3
Dependent Claim
40 words
An electrical generator as set forth in claim 1 wherein the laminations of each stack are of arcuate form with a plurality of parallel aligned slots adjacent the inner peripheral portions thereof for receiving said armature windings of said generator.
Claim 4
Dependent Claim
61 words
An electrical generator of the inductor-alternator type as claimed in claim 1, further comprising rectifying means for rectifying alternating current generated in the armature winding during rotation of the rotor and for providing energizing current for the field winding, and an end assembly having a compartment for receiving said rectifying means coaxially and removably mounted to one end of the stator.
Claim 5
Dependent Claim
64 words
An electrical generator as claimed in claim 3, wherein the generator presents a lengthwise extending passageway for cooling air, fan means mounted at one end of said passageway, means connecting said fan to be driven from the rotor, said passageway communicating with the said compartment for cooling the stator, rotor and rectifying means by air passing into the passageway by operation of said fan.
Claim 6
Dependent Claim
33 words
An electrical generator as claimed in claim 3 wherein said fan is at one end of the stator and the compartment at other, compartment having an opening to the interior of the stator.
Claim 7
Dependent Claim
33 words
An electrical generator as claimed in claim 5 wherein said rectifiers are mounted on heat sinks arrayed about the axis of said stator and positioned within the said compartment adjacent the opening thereof.
Claim 8
Dependent Claim
38 words
An electrical generator as claimed in claim 6 wherein a regulator for regulating field current and a filter assembly for suppression of high frequency signals in the output of the generator are also included in the said compartment.
Claim 9
Dependent Claim
38 words
An electrical generator as claimed in claim 7 wherein the regulator is coaxially mounted in the said compartment with the heat sinks arrayed therearound and the filter assembly is removably received in a side aperture of said compartment.
Claim 10
Dependent Claim
28 words
An electrical generator as claimed in claim 8 wherein said filter assembly is carried in a removable casing to which casing are attached output terminals of the generator.
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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) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |