US4268772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated rotor with cast end windings
Assignee: S B W ENGINEERS Ltd
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Filing: 1979-08-28
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Granted: 1981-05-19
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Expires: 1999-08-28
Abstract
Abstract A laminated electromagnetic core incorporates a double layer winding with the core being formed from first and second sets of apertured laminations of which one set accommodates the conductors of one layer of the winding and the other set accommodates the conductors of the other layer of the winding the conductors being interconnected by end windings and adjacent laminations in each lamination set are displaced from mutual alignment to permit the conductor end windings to be of minimal length such that conductor ends which are to be interconnected adjoin one another, the end windings being formed as in situ castings.
Inventors
- 👤 John Workman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:58
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/26; H02K15/00; H02K15/02; H02K15/021; H02K23/00; H02K23/26; H02K3/00; H02K3/04; H02K3/12; H02K2201/00; H02K2201/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
An electromagnetic device having a core made of laminated material with a double-layer winding therein, wherein said core is composed of first and second sets of apertured laminations of which one set accommodates the conductors of one layer of said winding and the other set accommodates the condutors of the other layer of said winding, the conductors of said one layer being interconnected with the conductors of said other layer by cast in situ end windings located at the end faces of said core, and wherein each lamination set includes adjacent laminations which are mutually displaced from alignment, the arrangement being such that the end windings interconnect adjoining conductor ends.
Claim 2
Dependent Claim
110 words
An electromagnetic device having a core made of laminated material with a double-layer winding therein, wherein said core is composed of first and second sets of apertured laminations of which one set accommodates the conductors of one layer of said winding and the other set accommodates the condutors of the other layer of said winding, the conductors of said one layer being interconnected with the conductors of said other layer by cast in situ end windings located at the end faces of said core, and wherein each lamination set includes adjacent laminations which are mutually displaced from alignment, the arrangement being such that the end windings interconnect adjoining conductor ends.
Claim 3
Dependent Claim
18 words
A device as claimed in claim 1, wherein each lamination set includes adjacent laminations which are mutually aligned.
Claim 4
Dependent Claim
24 words
A device as claimed in claim 1, wherein a layer of alumina separates the first set of laminations from the second set of laminations.
Claim 5
Dependent Claim
57 words
A device as claimed in claim 1, wherein adjacent said end windings the conductor ends of said one layer have the same cross-sectional area as the conductor ends of said other layer but the cross-sectional shape of the conductor ends in said one layer differs from the cross-sectional shape of the conductor ends in said other layer.
Claim 6
Dependent Claim
26 words
A device as claimed in claim 1, wherein said core is substantially cylindrical and said laminations are annular, said first and second lamination sets being co-axial.
Claim 7
Dependent Claim
42 words
A device as claimed in claim 5, wherein the mutually displaced adjacent laminations of said first lamination set are skewed in one circumferential direction and the mutually displaced adjacent laminations of said second lamination set are skewed in the opposite circumferential direction.
Claim 8
Dependent Claim
28 words
A device as claimed in claim 5, wherein the lamination apertures adjacent the core ends are of greater cross-sectional area than the lamination apertures of the intermediate laminations.
Claim 9
Dependent Claim
33 words
A device as claimed in claim 5, wherein the apertures of the co-axially inner lamination set are elongated in the radial direction and mutually separated by substantially constant widths of the lamination material.
References Cited (Backward Citations)
US1610506A
Cited
US1538196A
Cited
DE590949C
Cited
GB561658A
Cited
US2528960A
Cited
FR1405924A
Cited
US3761752A
Cited
US3987324A
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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) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |