US3802068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a rotor
Assignee: CENTURY ELECTRIC Inc A DE CORP
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Filing: 1972-04-14
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Granted: 1974-04-09
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Expires: 1992-04-14
Abstract
Abstract Laminations for a rotor are equipped with outwardly-projecting tabs; and those laminations are stacked so they are coaxial and so the outwardly-projecting tabs thereof are aligned to provide corresponding alignment of the conductor-receiving passages defined by those laminations. Welds are formed at the outer faces of the outwardly-projecting tabs to bond the laminations together; and then, after conductors have been diecast in the conductor-receiving passages, those outwardly-projecting tabs and the welds on the outer faces thereof are machined away to provide a smooth cylindrical surface for the rotor.
Inventors
- 👤 R Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:44
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/02; H02K15/021; H02K15/023; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012; Y10T29/4902; Y10T29/49075; Y10T29/49078; Y10T29/53; Y10T29/5313; Y10T29/53143; Y10T29/5317
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
226 words
A method of making a lamination stack for use in making a die-cast rotor which comprises forming a plurality of laminations each of which has a centrally-located opening and a generallycircular periphery and a tab projecting outwardly beyond said generally-circular periphery and a plurality of circumferentially-spaced openings intermediate said centrallylocated opening and said generally-circular periphery, telescoping said centrally-located openings of said plurality of laminations over an arbor, engaging said outwardly-projecting tabs of said plurality of laminations with an aligning guide to align said outwardly-projecting tabs of said plurality of laminations with each other, applying axially-direCted forces, to the outer faces of the endmost laminations of said plurality of laminations to urge the confronting faces of said plurality of laminations into intimate engagement with each other and thereby form said lamination stack, moving a welding element along the aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack to weld together the outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack and thereby form a substantially continuous weld, along said outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack, and keeping the heat developed by said welding element low enough to keep all portions of said substantially-continuous weld outwardly of the cylindrical surface defined by the periphery of said lamination stack.
Claim 2
Independent Claim
226 words
A method of making a lamination stack for use in making a die-cast rotor which comprises forming a plurality of laminations each of which has a centrally-located opening and a generallycircular periphery and a tab projecting outwardly beyond said generally-circular periphery and a plurality of circumferentially-spaced openings intermediate said centrallylocated opening and said generally-circular periphery, telescoping said centrally-located openings of said plurality of laminations over an arbor, engaging said outwardly-projecting tabs of said plurality of laminations with an aligning guide to align said outwardly-projecting tabs of said plurality of laminations with each other, applying axially-direCted forces, to the outer faces of the endmost laminations of said plurality of laminations to urge the confronting faces of said plurality of laminations into intimate engagement with each other and thereby form said lamination stack, moving a welding element along the aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack to weld together the outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack and thereby form a substantially continuous weld, along said outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack, and keeping the heat developed by said welding element low enough to keep all portions of said substantially-continuous weld outwardly of the cylindrical surface defined by the periphery of said lamination stack.
Claim 3
Independent Claim
223 words
A method of making a lamination stack for use in making a die-cast rotor which comprises forming a plurality of laminations each of which has a centrally-located opening and a generally-circular periphery and a tab projecting outwardly beyond said generally-circular periphery and a plurality of circumferentially-spaced openings intermediate said centrally-located opening and said generally-circular periphery, telescoping said centrally-located openings of said plurality of laminations over an arbor, engaging said outwardly-projecting tabs of said plurality of laminations with an aligning guide to align said outwardly-projecting tabs of said plurality of laminations with each other, applying axially-directed forces, to the outer faces of the endmost laminations of said plurality of laminations to urge the confronting faces of said plurality of laminations into intimate engagement with each other and thereby form said lamination stack, moving a welding element along the aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack to weld together the outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack and thereby form a substantially-continuous weld along said outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack, and subsequently removing said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack and said substantially-continuous weld to make the periphery of said lamination stack completely cylindrical.
Claim 4
Independent Claim
223 words
A method of making a lamination stack for use in making a die-cast rotor which comprises forming a plurality of laminations each of which has a centrally-located opening and a generally-circular periphery and a tab projecting outwardly beyond said generally-circular periphery and a plurality of circumferentially-spaced openings intermediate said centrally-located opening and said generally-circular periphery, telescoping said centrally-located openings of said plurality of laminations over an arbor, engaging said outwardly-projecting tabs of said plurality of laminations with an aligning guide to align said outwardly-projecting tabs of said plurality of laminations with each other, applying axially-directed forces, to the outer faces of the endmost laminations of said plurality of laminations to urge the confronting faces of said plurality of laminations into intimate engagement with each other and thereby form said lamination stack, moving a welding element along the aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack to weld together the outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack and thereby form a substantially-continuous weld along said outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack, and subsequently removing said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack and said substantially-continuous weld to make the periphery of said lamination stack completely cylindrical.
Claim 5
Independent Claim
254 words
A method of making a lamination stack for use in making a die-cast rotor which comprises forming a plurality of laminations each of which has a centrally-located opening and a generally-circular periphery and a tab projecting outwardly beyond said generally-circular periphery and a plurality of circumferentially-spaced openings intermediate said centrally-located opening and said generally-circular periphery, telescoping said centrally-located openings of said plurality of laminations over an arbor, engaging said outwardly-projecting tabs of said plurality of laminations with an aligning guide to align said outwardly-projecting tabs of said plurality of laminations with each other, applying axially-directed forces, to the outer faces of the endmost laminations of said plurality of laminations to urge the confronting faces of said plurality of laminations into intimate engagement with each other and thereby form said lamination stack, moving a welding element along the aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack to weld together the outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack and thereby form a substantially-continuous weld along said outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack, keeping the heat developed by said welding element low enough to keep all portions of said substantially-continuous weld outwardly of the cylindrical surface defined By the periphery of said lamination stack, and subsequently removing said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack and said substantially-continuous weld to make the periphery of said lamination stack completely cylindrical.
Claim 6
Independent Claim
254 words
A method of making a lamination stack for use in making a die-cast rotor which comprises forming a plurality of laminations each of which has a centrally-located opening and a generally-circular periphery and a tab projecting outwardly beyond said generally-circular periphery and a plurality of circumferentially-spaced openings intermediate said centrally-located opening and said generally-circular periphery, telescoping said centrally-located openings of said plurality of laminations over an arbor, engaging said outwardly-projecting tabs of said plurality of laminations with an aligning guide to align said outwardly-projecting tabs of said plurality of laminations with each other, applying axially-directed forces, to the outer faces of the endmost laminations of said plurality of laminations to urge the confronting faces of said plurality of laminations into intimate engagement with each other and thereby form said lamination stack, moving a welding element along the aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack to weld together the outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack and thereby form a substantially-continuous weld along said outer faces of said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack, keeping the heat developed by said welding element low enough to keep all portions of said substantially-continuous weld outwardly of the cylindrical surface defined By the periphery of said lamination stack, and subsequently removing said aligned outwardly-projecting tabs of said plurality of laminations in said lamination stack and said substantially-continuous weld to make the periphery of said lamination stack completely cylindrical.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |