Variable inductor having extended useable frequency range

Details Variable inductor having extended useable frequency range Variable inductor having extended useable frequency range

1982-04-01

1983-10-04

Grimley, A. T.

Inductor devices

With means to change coil length or connections

Contactor following helical conductor

336137, 336140, 336141, 336144, 336149, H01H 5108

Patent

active

044081774

ABSTRACT:
A plurality of moveable contactors may travel along a rotating coil, one end of which is conductive and the other end of which is non-conductive. Two or more electrically interconnected moveable contactors effect a shorting across unused electrical turns and thereby affect unused coil portion resonance. For tuning conditions where very little of the coil is unused, the non-conductive coil portion serves as a sidetrack onto which one or more contactors can move and acts as a mechanical storage or memory for preserving relative positions between contactors.

REFERENCES:
patent: 2331522 (1943-10-01), Vance
patent: 2415736 (1947-02-01), Flood et al.
patent: 3156888 (1964-11-01), Blanco
patent: 4064474 (1977-12-01), Adams et al.

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