Method for fabricating a dielectric filled ferrite toroid for use in microwave devices
AssigneeAmpex Corporation
InventorsFrank R. Monforte, Giltan M. Argentina
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Abstract
The process provides practical manufacture of a two-piece, dielectric filled, ferrite toroid assembly while providing optimum electromagnetic characteristics presently not consistently available by manufacturing the toroid in a pressed one-piece configuration. A pair of complementary ferrite blanks of selected shapes are machined to dimension, and the mating surfaces thereof are selectively lapped. The complementary ferrite parts are then permanently assembled about a pre-machined dielectric insert, and the composite toroid is secured together by a selected adhesive selectively disposed therein.
Claims9
A method for fabricating a two-piece toroid having a dielectric material insert, which two-piece toroid exhibits the hystersis loop characteristics of a one-piece toroid, comprising the steps of:
- pressing selected quantities of a magnetic material into a pair of selected complementary blanks of substantially uniform density over their entire cross-sections;
- machining the pair of blanks to define confronting mating surfaces commensurate with complementary cross-sectional shapes and lengths of given dimensions within selected tolerances;
- lapping the confronting mating surfaces of the pair of machined shapes to a finish sufficient to maintain the hystersis loop characteristics inherent in a similar one-piece configuration formed of the same magnetic material;
- machining a single dielectric material insert to outside dimensions which allow the insert to fit snugly within the complementary pair of magnetic machined shapes along the entire length thereof;
- and
- assembling the complementary pair of machined shapes about the dielectric material insert with intimate contact between all surfaces of the insert facing respective confronting surfaces of the machined shapes, wherein the lapped confronting surfaces of the machined shapes are in such intimate contact that the hysteresis loop characteristics are similar to those of a one-piece toroid.
A method for fabricating a two-piece toroid having a dielectric material insert, which two-piece toroid exhibits the hysteresis loop characteristics of a one-piece toroid, comprising the steps of;
- machining a pair of complementary blanks of a magnetic material, with a substantially uniform density over the blanks' cross-sections, to define confronting mating surfaces on the blanks commensurate with the complementary cross-sectional shapes and lengths of given dimensions within selected tolerances;
- lapping the confronting mating surfaces of the pair of machined shapes to a finish sufficient to maintain the hysteresis loop characteristics inherent in a similar one-piece configuration formed of the same magnetic material;
- machining a dielectric material to form a single insert of outside dimensions which allow the insert to fit snugly within the complementary pair of magnetic machined shapes along the entire length thereof;
- and
- assembling the complementary pair of machined shapes about the dielectric material insert with intimate contact between all surfaces of the insert facing respective confronting surfaces of the machined shapes, wherein the lapped confronting surfaces of the machined shapes are in such intimate contact that the hysteresis loop characteristics are similar to those of a one-piece toroid.
Dependencies are inferred from the claim text.