Air trimmer capacitor

Details Air trimmer capacitor Air trimmer capacitor

1981-08-24

1983-11-15

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Variable

H01G 514

Patent

active

044159498

ABSTRACT:
A variable air trimmer capacitor has its annular interfitting electrodes movable axially with respect to each other by the helical threads of the rotor moving through the coils of a spring. Adjacent ones of the coils of the spring are axially offset from each other. The spring is confined in the barrel of a bushing which is of smaller diameter than the spring when in its relaxed state, and the coils of the spring are urged toward axial alignment when moved onto the threads of the rotor, thus assuring positive electrical contact between the rotor, spring and bushing.

REFERENCES:
patent: Re30406 (1980-09-01), Johanson
patent: 1589204 (1926-06-01), Miller et al.
patent: 1862930 (1932-06-01), Gebhard et al.
patent: 2001282 (1935-06-01), Nyman
patent: 2765431 (1956-10-01), Repro
patent: 3230430 (1966-01-01), Barnes
patent: 3336515 (1967-08-01), Seiden et al.
patent: 3382421 (1968-05-01), Hirschberg
patent: 3560811 (1971-02-01), Farago
patent: 3611075 (1971-10-01), Lindsay
patent: 4035697 (1977-07-01), Arnold, Jr.
patent: 4166309 (1979-09-01), Schenk

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