Patent US3144364A successfully refreshed from Google Patents.
US3144364A
Expired / Lapsed
US
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Induction annealing of magnetic alloy sheet
Assignee: Westinghouse Electric Corp
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Filing: 1960-11-14
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Granted: 1964-08-11
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Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Chauncey G Robinson
- 👤 Kenneth J Best
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:22
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/025; C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/60; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/16; H01F1/18; C21D8/00; C21D8/12; C21D8/1277; C21D8/1283; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
IN A CONTINUOUS METHOD FOR OBTAINING STRESS RELIEVED MAGNETIC ALLOY SHEET OF EXTREME FLATNESS AND HAVING AN INSULATING FILM ON THE SURFACES THEREOF, IN WHICH THE MAGNETIC SHEET IS SEQUENTIALLY HEATED TO ANNEALING TEMPERATURES AND COOLED, THE IMPROVEMENT COMPRISING THE STEPS OF, COATING THE MOVING SHEET WITH AN INSULATING COATING COMPOSITION, MOVING THE COATED SHEET UPWARDLY AXIALLY OF A VERTICALLY DISPOSED ENCIRCLING INDUCTION COIL ENERGIZED WITH HIGH FREQUENCY CURRENT OT PRODUCE A LONGITUDINAL FLUX IN THE SHEET WHEREBY A NARROW TRANSVERSE BAND OF THE SHEET IS RAPIDLY RAISED TO A TEMPERATURE IN THE RANGE FROM 725*C. TO 775*C., THE ISOTHERMAL LINES BEING SUBSTANTIALLY STRAIGHT AND PERPENDICULAR TO THE EDGES OF THE SHEET, THEREAFTER CONTINUING THE VERTICAL UPWARD MOVEMENT OF THE SHEET TO EFFECT COOLING BY RADIATION TO COOLED SURFACES ON EITHER SIDE THEREOF WITH COOLING FACES SUBSTANTIALLY PARALLEL TO THE SHEET SURFACES AND CLOSELY SPACED THERETO TO PROVIDE A SUBSTANTIALLY DEAD AIR CHAMBER, WHEREBY THE SHEET IS COOLED TO A PREDETERMINED TEMPERATURE BELOW 400*C.
Claim 2
Dependent Claim
164 words
IN A CONTINUOUS METHOD FOR OBTAINING STRESS RELIEVED MAGNETIC ALLOY SHEET OF EXTREME FLATNESS AND HAVING AN INSULATING FILM ON THE SURFACES THEREOF, IN WHICH THE MAGNETIC SHEET IS SEQUENTIALLY HEATED TO ANNEALING TEMPERATURES AND COOLED, THE IMPROVEMENT COMPRISING THE STEPS OF, COATING THE MOVING SHEET WITH AN INSULATING COATING COMPOSITION, MOVING THE COATED SHEET UPWARDLY AXIALLY OF A VERTICALLY DISPOSED ENCIRCLING INDUCTION COIL ENERGIZED WITH HIGH FREQUENCY CURRENT OT PRODUCE A LONGITUDINAL FLUX IN THE SHEET WHEREBY A NARROW TRANSVERSE BAND OF THE SHEET IS RAPIDLY RAISED TO A TEMPERATURE IN THE RANGE FROM 725*C. TO 775*C., THE ISOTHERMAL LINES BEING SUBSTANTIALLY STRAIGHT AND PERPENDICULAR TO THE EDGES OF THE SHEET, THEREAFTER CONTINUING THE VERTICAL UPWARD MOVEMENT OF THE SHEET TO EFFECT COOLING BY RADIATION TO COOLED SURFACES ON EITHER SIDE THEREOF WITH COOLING FACES SUBSTANTIALLY PARALLEL TO THE SHEET SURFACES AND CLOSELY SPACED THERETO TO PROVIDE A SUBSTANTIALLY DEAD AIR CHAMBER, WHEREBY THE SHEET IS COOLED TO A PREDETERMINED TEMPERATURE BELOW 400*C.
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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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |