Adjustable-inductance electric coil

Details Adjustable-inductance electric coil Adjustable-inductance electric coil

1976-03-19

1977-10-18

Kozma, Thomas J.

Inductor devices

Core forms casing

336136, H01F 2106

Patent

active

040548554

ABSTRACT:
An electrical coil is formed from a core of magnetizable material and surrounding winding. Through the core is an axially disposed circular passage into which is positioned and sealed with a suitable mastic a hollow cylindrical sleeve of a non-magnetizable material having one closed end aligning with the outer surface of the core. The sleeve is internally threaded for receiving a like threaded shaft of non-magnetizable material containing a tube core of a magnetizable material. Rotation of the shaft adjusts the location of the tube core so as to adjust the inductance of the coil when energized.

REFERENCES:
patent: 2905913 (1959-09-01), Leigh
patent: 3254319 (1966-05-01), Olsen et al.
patent: 3262079 (1966-07-01), Glover et al.
patent: 3480896 (1969-11-01), Newman

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