Patent US3596036A successfully refreshed from Google Patents.
US3596036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heater
Assignee: Park Ohio Holdings Corp
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Filing: 1970-03-16
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Granted: 1971-07-27
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Expires: 1990-03-16
Abstract
Abstract There is disclosed herein an induction heater having an induction coil disposed on a vertical axis and providing a rectangular opening. Means are provided for sequentially inserting a plurality of elongated slabs into the coil adjacent to one side of the coil, each slab being disposed on one side edge in a vertical plane parallel with said one side of the coil, the thickness of the slab being disposed normal to said one side of the coil. Each slab is progressively advanced across the coil in the direction of its thickness to a position adjacent to the side of the coil opposite to said one side, at which position the slab is removed from said coil. Means are provided for applying electrical power to the coil whereby each slab emerges fully and uniformly heated.
Inventors
- 👤 Nicholas V Ross
- 👤 Reuhl E Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:30
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
228 words
Apparatus for uniformly heating a plurality of elongated metal slabs each having a length substantially greater than the width thereof and a width substantially greater than the thickness thereof, said apparatus comprising an induction coil having a number of conductor turns substantially rectangular in form and disposed about a vertical axis; each said turn comprising two transversely spaced side conductors and two end conductors; said induction coil adapted to heat each of the plurality of slabs, each disposed on one of its longest side edges wholly within said coil, the longest dimension of the said slabs being disposed parallel with said side conductors whereby the magnetic field through the slabs is disposed substantially at right angles to the length and thickness of the said slabs, said coil having a transverse dimension sufficient to accommodate a plurality of side-by-side, transversely spaced positions therein; means for advancing each slab transversely from one side of said coil to the opposite side thereof while maintaining said slabs wholly within the coil by moving each of the slabs laterally to successive positions until each slab transverses said coil; and means for introducing each slab in relatively unheated condition into said coil adjacent to one side thereof and removing each slab in fully heated condition from the opposite side thereof, each slab following in successive sequential spaced movement through the coil a preceding slab.
Claim 2
Dependent Claim
228 words
Apparatus for uniformly heating a plurality of elongated metal slabs each having a length substantially greater than the width thereof and a width substantially greater than the thickness thereof, said apparatus comprising an induction coil having a number of conductor turns substantially rectangular in form and disposed about a vertical axis; each said turn comprising two transversely spaced side conductors and two end conductors; said induction coil adapted to heat each of the plurality of slabs, each disposed on one of its longest side edges wholly within said coil, the longest dimension of the said slabs being disposed parallel with said side conductors whereby the magnetic field through the slabs is disposed substantially at right angles to the length and thickness of the said slabs, said coil having a transverse dimension sufficient to accommodate a plurality of side-by-side, transversely spaced positions therein; means for advancing each slab transversely from one side of said coil to the opposite side thereof while maintaining said slabs wholly within the coil by moving each of the slabs laterally to successive positions until each slab transverses said coil; and means for introducing each slab in relatively unheated condition into said coil adjacent to one side thereof and removing each slab in fully heated condition from the opposite side thereof, each slab following in successive sequential spaced movement through the coil a preceding slab.
Claim 3
Dependent Claim
95 words
Heating apparatus as set forth in claim 1: said means for advancing said slabs comprising a fixed support having means providing a plurality of said positions in said coil; a movable support having means providing slab support positions spaced apart transversely of the coil the same distance as the positions of said fixed support; means for moving said movable support in a cycle comprising lateral, vertically upward, reverse lateral, and vertically downward movements whereby said slabs are sequentially advanced transversely of said coil a distance equal to the distance between adjaCent positions during each cycle.
Claim 4
Dependent Claim
92 words
Heating apparatus as set forth in claim 2: said movable support having means providing one more support position than said fixed support whereby each lateral movement of said movable support projects one or the other outermost support position of said movable support laterally beyond the fixed support; said means for introducing and removing each slab being adapted to deposit a slab on the outwardly projected movable support position in one laterally moved position thereof and receive a slab from the outwardly projected movable support position in the opposite laterally moved position thereof.
Claim 5
Dependent Claim
130 words
Heating apparatus as set forth in claim 3: said means for introducing and removing each slab comprising first vertically movable lift means disposed laterally beyond said fixed support on one side thereof; second vertically movable lift means disposed laterally beyond said fixed support on the opposite side thereof; said first lift means adapted to raise each slab to the general level of said fixed support whereby said movable support can move laterally and vertically upwardly to pick up a slab therefrom; said second lift means adapted to receive each said slab as a result of a reverse lateral and vertically downward movement of said movable support after each said slab has traversed the width of said coil, said second lift means lowering each said slab out of said induction coil.
Claim 6
Dependent Claim
46 words
Heating apparatus as set forth in claim 2: said means for introducing and removing the slab comprising overhead crane means adapted to lower each new slab into one side of said coil and lift each fully heated slab out of the opposite side of said coil.
Claim 7
Dependent Claim
112 words
Heating apparatus as set forth in claim 2: said support means comprising a plurality of rows of support fingers, each finger providing a horizontal, upwardly facing edge portion for supporting a portion of each slab; said fingers in each row being aligned in a direction parallel with said side conductors, and said rows being uniformly spaced apart in the direction of movement of the slabs across the heater, to provide said transversely spaced positions; the fingers of said movable support being disposed between fingers of said fixed support and movable laterally a distance equal to the distance between said spaced positions whereby to advance the slabs through successive positions across said heater.
Claim 8
Dependent Claim
61 words
Heating apparatus as set forth in claim 6: said upwardly facing edge portions of said fingers being disposed transversely of said slabs; at least certain of said edge portions having means providing upwardly open notches therein adapted to seat lower edge portions of the slabs and stabilizing said slabs at each said spaced position and during transfer between said spaced positions.
Claim 9
Dependent Claim
125 words
Heating apparatus as set forth in claim 1: said means for advancing said slabs comprising a plurality of fixed support members; a plurality of movable support members interposed between said fixed support members; each of said support members having means providing an elongated, upper slab supporting portion of refractory material disposed in the direction of movement of said slabs, said slabs being disposed across said supporting portions at right angles thereto; means for moving said movable support in a cycle comprising lateral, vertically upward, reverse lateral, and vertically downward movements whereby said slabs are successively picked up from said fixed support members by said movable support members and advanced transversely of said coil a distance equal to the distance between adjacent positions during each cycle.
Claim 10
Dependent Claim
140 words
Heating apparatus as set forth in claim 1: said means for advancing said slabs comprising a walking beam apparatus disposed below the coil opening and adapted to support said slabs at said positions and to advance said slabs to successive positions across said coil; a housing enclosing said coil around the sides and having a top cover; said top cover having movable panel means adjacent to said side conductors whereby said slabs can be inserted into said coil at said one side thereof and removed from said coil at said opposite side thereof; overhead crane means movable in a direction parallel with the direction of movement of said slabs; said crane means having gripping means suspended therefrom for successively introducing said slabs at said one side of the coil and successively removing fully heated slabs from the opposite side thereof.
Claim 11
Independent Claim
176 words
The method of uniformly heating a plurality of elongated metal slabs each having a length substantially greater than the width thereof and width substantially greater than the thickness thereof, the method comprising providing an induction coil having a number of substantially rectangular turns disposed about a vertical axis, each turn comprising two transversely spaced side conductors and two end conductors; disposing the slabs sequentially in said coil adjacent to the side conductors on one side of the coil with the longest dimension of each slab disposed parallel with the side conductors and the widths thereof parallel with the axis of the coil whereby the magnetic field through each slab is disposed substantially at right angles to the length and thickness of the slab; sequentially moving each slab in the direction of the thickness thereof through a plurality of positions spaced transversely across the coil and concurrently sequentially introducing other slabs adjacent to said one side of the coil and removing fully heated slabs from adjacent to the opposite side of the coil, and energizing said coil.
Claim 12
Independent Claim
176 words
The method of uniformly heating a plurality of elongated metal slabs each having a length substantially greater than the width thereof and width substantially greater than the thickness thereof, the method comprising providing an induction coil having a number of substantially rectangular turns disposed about a vertical axis, each turn comprising two transversely spaced side conductors and two end conductors; disposing the slabs sequentially in said coil adjacent to the side conductors on one side of the coil with the longest dimension of each slab disposed parallel with the side conductors and the widths thereof parallel with the axis of the coil whereby the magnetic field through each slab is disposed substantially at right angles to the length and thickness of the slab; sequentially moving each slab in the direction of the thickness thereof through a plurality of positions spaced transversely across the coil and concurrently sequentially introducing other slabs adjacent to said one side of the coil and removing fully heated slabs from adjacent to the opposite side of the coil, and energizing said coil.
Claim 13
Dependent Claim
41 words
The method of heating elongated metal slabs as set forth in claim 10 including maintaining the slabs at the spaced positions for a time period between each sequential movement of the slabs; and energizing the coil only during such time periods.
Claim 14
Dependent Claim
27 words
The method of heating elongated metal slabs as set forth in claim 10 wherein the coil is energized continuously as the slabs are advanced across the coil.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |