Abstract An induction heater for heating a rotating godet in a synthetic fiber processing device, the heater having a tubular, radially laminated magnetic core clamped between two transversely laminated, circular end flanges of magnetic material having inset portions extending over the ends of the core and an alternating current excited winding filling the space between the flanges, the tubular core also being aligned with openings in the flanges permitting the passage of a shaft therethrough for supporting and rotating a cylindrical godet, which surrounds the lateral surface and one end of the heater by which hysteresis and eddy currents are induced in the godet, the core laminations preventing induced heating of the core, and the circular flanges preventing the magnetic flux drag between the core and the godet.
A rotating heating device having an outer cylindrical conductive godet and means within said godet for inducing a current in said godet, the improvement in said means comprising a hollow spool having a central laminated magnetic core, the laminations of the core extending radially, a corresponding annular, laminated magnetic flange upon each end of the core, the laminations of the flanges being transverse of the core and the annular continuity of each flange being interrupted by a slot, and a winding upon the core between the said flanges.
Claim 2
Dependent Claim
88 words
A rotating heating device having an outer cylindrical conductive godet and means within said godet for inducing a current in said godet, the improvement in said means comprising a hollow spool having a central laminated magnetic core, the laminations of the core extending radially, a corresponding annular, laminated magnetic flange upon each end of the core, the laminations of the flanges being transverse of the core and the annular continuity of each flange being interrupted by a slot, and a winding upon the core between the said flanges.
Claim 3
Dependent Claim
31 words
The invention according to claim 1 wherein the radial laminations are spaced from one another more at the outer circumference of the core than at the inner circumference of the core.
Claim 4
Dependent Claim
26 words
The invention according to claim 2 wherein the means for spacing the said radial laminations comprises nodules formed adjacent to the outer edges of the laminations.
Claim 5
Dependent Claim
38 words
The invention of claim 1 with the further provision of hollow rods interspersing the core laminations and extending between the flanges and threaded screws through the rods extending beyond the flanges for clamping the flanges to the core.
Claim 6
Dependent Claim
35 words
The invention of claim 4 wherein the inner surfaces of the end flanges have circular, concentric insets conforming to the outside diameter of the core and into which the ends of the core are inserted.