Inductor devices – Core forms casing
Patent
1982-11-05
1985-04-16
Kozma, Thomas J.
Inductor devices
Core forms casing
29602R, 29608, 264 67, 264DIG58, 336136, 336233, H01F 2106, H01F 4102
Patent
active
045118728
ABSTRACT:
New ferrite pot core type products and fabrication methods are disclosed for production and assembly of tunable-inductance magnetically-soft ferrite devices. Unitary helical threads formed within the central opening of a ferrite pot core element provide controlled axial movement of a non-threaded male tuning member, carrying a ferrite rod, to adjust the air gap between spaced center posts of an assembled pair of pot core elements. Thread matching and registry requirements are eliminated by such unitary thread means which present either helical path die means, for cutting threads in a cylindrical nonmagnetic portion of a male tuning member or, circumferentially continuous helical threads, which deform nonmagnetic protrusions uniformly distributed about the periphery of a noncircular cross section nonmagnetic portion of a male tuning member during rotation of a male tuning member within a core element central opening.
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Huth, III Joseph F.
Olmsted Robert W.
Baker Raymond N.
Kozma Thomas J.
Spang Industries Inc.
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