Adjustable air gap ferrite structures and methods of manufacture

Details Adjustable air gap ferrite structures and methods of manufacture Adjustable air gap ferrite structures and methods of manufacture

1982-11-05

1985-06-11

Kozma, Thomas J.

Inductor devices

Core forms casing

29608, 264 67, 336136, H01F 2106

Patent

active

045231702

ABSTRACT:
New fabricating methods and products are disclosed for manufacture and assembly of tunable-inductance magnetically-soft ferrite core assemblies. Pot core type elements are pressure molded from ferrimagnetic particles having residual reactivity; unitary helical threads are tapped in central openings of compacted core elements while in the green state; subsequent heat treatment converts the green compact to a ceramic. Use of a shrink tap provides compatibility of the unitary threads with the pre-threaded male adjustment members of the prior practice. A new assembly enables use of identical core half sections; provision is made for support at one or both longitudinal ends of the male tuning member.

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