US3562470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1969-06-24
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Granted: 1971-02-09
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Expires: 1989-06-24
Abstract
Abstract Disclosed herein in a continuous heating line is an induction heating apparatus for the supplemental discrete heating of corner edges of thick elongated metal workpieces of rectangular cross section in conjunction with heating by other means along such line, in behalf of temperature uniformity sectionally of the workpieces, at which apparatus includes induction heating coil means affiliated with laminations concentrating and directing the magnetic flux produced by such coil means diagonally through such corner edges.
Inventors
- 👤 George F Bobart
- 👤 William A Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:49
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/101; H05B6/103; H05B6/104
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
Induction heating apparatus for a heating line to effect localized heating of temperature deficient side corNer regions of an elongated thick workpiece of rectangular cross-sectional configuration including other heating means along such line, said heating apparatus comprising: elongated induction heating coil means in extension along the length of such workpiece; a source of energizing alternating current for such coil means; and flux concentrating laminated core means magnetically coupled to such induction heating coil means, having pole pieces of opposite polarity diagonally spanning workpiece side corner regions and concentrating and directing magnetic flux lines from such coil means diagonally through such workpiece corner regions.
Claim 2
Dependent Claim
103 words
Induction heating apparatus for a heating line to effect localized heating of temperature deficient side corNer regions of an elongated thick workpiece of rectangular cross-sectional configuration including other heating means along such line, said heating apparatus comprising: elongated induction heating coil means in extension along the length of such workpiece; a source of energizing alternating current for such coil means; and flux concentrating laminated core means magnetically coupled to such induction heating coil means, having pole pieces of opposite polarity diagonally spanning workpiece side corner regions and concentrating and directing magnetic flux lines from such coil means diagonally through such workpiece corner regions.
Claim 3
Dependent Claim
20 words
The induction heating apparatus of claim 1, wherein the aforesaid flux concentrating means is in form of stacked iron laminations.
Claim 4
Dependent Claim
79 words
The induction heating apparatus of claim 2, wherein the laminations of the aforesaid stacked iron laminations are E-shaped with the end legs of such shape longer than the central leg thereof, and the coil means encircles the aggregate central legs of the lamination stack and nests between the aggregate end legs, whereby such aggregate central legs constitute a common pole piece for two workpiece corners, and the aggregate end legs serve as respective opposite pole pieces for such corners.
Claim 5
Dependent Claim
33 words
The induction heating apparatus of claim 1, disposed in a heating line wherein said other heating means is an induction heating means including a helical coil into which the workpiece is inserted longitudinally.
Claim 6
Dependent Claim
30 words
The induction heating apparatus of claim 1, further including means for advancing the side corner regions of the aforesaid workpiece longitudinally past the pole pieces of the flux concentrating means.
Claim 7
Dependent Claim
56 words
The induction heating apparatus of claim 1, wherein the induction heating coil and flux concentrating means are plural for effecting localized heating of all of four side corner regions of the elongated rectangular cross section workpiece while permitting adjustment in relative positioning of such plural means to accommodate a grossly different cross-sectional dimension of such workpiece.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |