Patent US3818514A successfully refreshed from Google Patents.
Patent CH418069A successfully refreshed from Google Patents.
Patent US3726269A successfully refreshed from Google Patents.
US3071845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Progressive winding of coils
Assignee: Westinghouse Electric Corp
•
Filing: 1957-04-24
•
Granted: 1963-01-08
•
Expires: 1977-04-24
Abstract
No abstract record available.
Inventors
- 👤 Merrill G Leonard
- 👤 William A Siefert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:08
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/324; H01F27/322; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN THE METHOD OF PROVIDING A UNITARY COIL ASSEMBLY HAVING HIGH-VOLTAGE WINDINGS AND LOW-VOLTAGE WINDINGS, SAID ASSEMBLY BEING ADAPTED TO OPERATE IMMERSED IN A LIQUID DIELECTRIC, THE STEPS OF: (1) WINDING A STRIP OF PAPER HAVING A DISCONTINOUS COATING OF THERMOSETTING RESIN THEREON TO PROVIDE A COIL FORM, SAID RESIN COATING BEING DISCONTINUOUS IN THE LENGTHWISE DIRECTION OF SAID STRIP OR PAPER THE UNCOATED PORTION OF SAID PAPER BEING PENETRABLE BY LIQUID DIELECTRIC (2) WINDING LOW-VOLTAGE WINDINGS ON SAID COIL FORM, (3) PROVIDING SPACER MEANS TO PROVIDE DUCTS ADJACENT SAID LOW-VOLTAGE WINDING, SAID DUCT MEANS PERMITTING THE ENTRY OF THE LIQUID DIELECTRIC ADJACENT SAID LOW-VOLTAGE WINDINGS, (4) WINDING PAPER HAVING A DISCONTINUOUS COATING OF THERMOSETTING RESIN THEREON ON SAID DUCT MEANS TO FORM A TUBE, SAID TUBE BEING OF SUCH THICKNESS AS TO EFFECTIVELY INSULATE AGAINST VOLTAGE BREAKDOWN
Claim 2
Dependent Claim
138 words
IN THE METHOD OF PROVIDING A UNITARY COIL ASSEMBLY HAVING HIGH-VOLTAGE WINDINGS AND LOW-VOLTAGE WINDINGS, SAID ASSEMBLY BEING ADAPTED TO OPERATE IMMERSED IN A LIQUID DIELECTRIC, THE STEPS OF: (1) WINDING A STRIP OF PAPER HAVING A DISCONTINOUS COATING OF THERMOSETTING RESIN THEREON TO PROVIDE A COIL FORM, SAID RESIN COATING BEING DISCONTINUOUS IN THE LENGTHWISE DIRECTION OF SAID STRIP OR PAPER THE UNCOATED PORTION OF SAID PAPER BEING PENETRABLE BY LIQUID DIELECTRIC (2) WINDING LOW-VOLTAGE WINDINGS ON SAID COIL FORM, (3) PROVIDING SPACER MEANS TO PROVIDE DUCTS ADJACENT SAID LOW-VOLTAGE WINDING, SAID DUCT MEANS PERMITTING THE ENTRY OF THE LIQUID DIELECTRIC ADJACENT SAID LOW-VOLTAGE WINDINGS, (4) WINDING PAPER HAVING A DISCONTINUOUS COATING OF THERMOSETTING RESIN THEREON ON SAID DUCT MEANS TO FORM A TUBE, SAID TUBE BEING OF SUCH THICKNESS AS TO EFFECTIVELY INSULATE AGAINST VOLTAGE BREAKDOWN
References Cited (Backward Citations)
US1641272A
Cited
US2195233A
Cited
US2246159A
Cited
US2320922A
Cited
US2389733A
Cited
US2422037A
Cited
US2602035A
Cited
US2696659A
Cited
US2799836A
Cited
US2782386A
Cited
US2807869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |