Electric heating – Metal heating – Of cylinders
Patent
1991-07-01
1993-06-08
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 10491, 219 1067, 148574, 148567, 266129, H05B 640
Patent
active
052181782
ABSTRACT:
Method and apparatus for internally heating solid bodies using electromagnetic induction. The method comprises generating an electromagnetic induction field and causing it to induce the flow of an electric current in a preselected portion of a solid body to be heated. The electric current has a direction and magnitude sufficient to cause internal heating of the preselected portion of the body. The induction field and the body are rotated relative to one another for causing the direction of the induced current to rotate relative to the body about a preselected location to cause overheating at the preselected location. The body is cooled, except for the preselected portion to be heated. The apparatus comprises a coil for generating an electromagnetic induction field for inducing the flow of an electric current in a preselected portion of a solid body to be heated. The electric current has a direction and magnitude sufficient to cause internal heating of the preselected portion of the body. The apparatus includes a turntable for rotating the induction field and the body relative to one another to cause the direction of flow of the induced current to rotate relative to the body about a preselected location to cause overheating at the preselected location, and a cooling system for cooling the body except for the preselected portion to be heated.
REFERENCES:
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patent: 2615286 (1952-10-01), Descarsin
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patent: 3466202 (1969-09-01), Hrusovsky
patent: 3620289 (1971-11-01), Phipps, Jr.
patent: 4523067 (1985-06-01), Brown et al.
patent: 4579080 (1986-04-01), Martin et al.
patent: 4639567 (1987-01-01), Stenzel
Inductotherm Corp.
Leung Philip H.
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