Electric heating – Metal heating – Of cylinders
Patent
1991-08-12
1993-08-10
Reynolds, Bruce A.
Electric heating
Metal heating
Of cylinders
219 10491, 219 10614, 219 1059, 219 1075, H05B 614
Patent
active
052351513
ABSTRACT:
A godet in which the areas of the magnetic return jacket reaching to the inside periphery of the godet jacket are formed by separate intermediate rings made from magnetically active material, which are placed on front and back ends of the short-circuiting rings and between the short-circuiting rings. Inside surfaces of the short-circuiting rings and intermediate rings, together, form the inside periphery of godet jacket, and the godet jacket has an outside jacket disposed coaxially outside of the magnetic return jacket. Open annular channels are formed between the magnetic return jacket and the outside jacket as well as between the magnetic return jacket and the short-circuiting rings or intermediate rings. The annular channels are connected to one another on both ends by crosswise channels, and the annular channels and crosswise channels are filled with an electrically highly conductive, magnetically inactive liquid metal. The primary winding of the heater is supplied with power in phase displacement so that a field traveling in the axial direction results.
REFERENCES:
patent: 3581060 (1971-05-01), Bauer
patent: 3879594 (1975-04-01), Shillito
patent: 4005302 (1977-01-01), Graf et al.
patent: 4180717 (1979-12-01), Lenk et al.
patent: 4208560 (1980-06-01), Turk et al.
patent: 4304975 (1981-12-01), Lenk et al.
patent: 4647744 (1987-03-01), Kitano et al.
patent: 4675487 (1987-06-01), Verkasalo
patent: 4822972 (1989-04-01), Sugioka et al.
Apparatebau. Dampf- und Kraftanlagen GmbH
Hoang Tu
Reynolds Bruce A.
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