US3150280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated stack of electrical laminations and method of making the same
Assignee: Northrop Grumman Systems Corp
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Filing: 1960-10-13
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Granted: 1964-09-22
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Expires: 1980-10-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:53
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
AN INSULATED ROTOR COMPRISING A SHAFT HAVING A STACK OF LAMINATIONS MOUNTED THEREON, SAID LAMINATIONS HAVING A SERIES OF PERIPHERAL TEETH WITH SLOTS FORMED THEREBETWEEN, A WIRE WINDING ON SAID ROTOR POSTIONED IN SAID SLOTS TO FORM SLOT WINDINGS AND POSITIONED ACROSS THE FACE OF EACH END LAMINATION TO FORM END WINDINGS, AND A SINGLE SHEET OF INSULATION BETWEEN SAID WINDINGS AND SAID STACK, SAID INSULATION SHEET LYING IN THE SLOTS IN FORM SLOT INSULATIONS AND ACROSS THE FACE OF EACH END LAMINATION TO FORM END INSULTION, SAID INSULATION SHEET HAVING ROUNDED CORNERS BETWEEN SAID SLOT AND END INSULATION, SAID END INSULATION BEING CRINKLED SO AS TO CUSHION SAID END WINDINGS.
Claim 2
Dependent Claim
111 words
AN INSULATED ROTOR COMPRISING A SHAFT HAVING A STACK OF LAMINATIONS MOUNTED THEREON, SAID LAMINATIONS HAVING A SERIES OF PERIPHERAL TEETH WITH SLOTS FORMED THEREBETWEEN, A WIRE WINDING ON SAID ROTOR POSTIONED IN SAID SLOTS TO FORM SLOT WINDINGS AND POSITIONED ACROSS THE FACE OF EACH END LAMINATION TO FORM END WINDINGS, AND A SINGLE SHEET OF INSULATION BETWEEN SAID WINDINGS AND SAID STACK, SAID INSULATION SHEET LYING IN THE SLOTS IN FORM SLOT INSULATIONS AND ACROSS THE FACE OF EACH END LAMINATION TO FORM END INSULTION, SAID INSULATION SHEET HAVING ROUNDED CORNERS BETWEEN SAID SLOT AND END INSULATION, SAID END INSULATION BEING CRINKLED SO AS TO CUSHION SAID END WINDINGS.
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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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |