Combination feed-through and trimmer capacitor

Claim 1

A CAPACITOR OF THE CHARACTER DESCRIBED COMPRISING A LONGITUDINALLY EXTENDING METALLIC CASING TO BE CONNECTED TO A FIXED ELECTRICAL POTENTIAL, SAID CASING CONTAINING A LONGITUDINALLY EXTENDING CENTRAL ELECTRODE CAPACITATIVELY RELATED TO SAID CASING ALONG THE LENGTH THEREOF, SAID CENTRAL ELECTRODE HAVING FIRST AND SECOND TERMINALS, DIELECTRIC MEANS PREDETERMINEDLY SPACING THE ELECTRODE WITH RESPECT TO SAID CASING TO FORM A FEED-THROUGH CONDENSER SECTION OF RELATIVELY FIXED CAPACITANCE BETWEEN SAID FIRST AND SECOND TERMINALS, SAID CASING BEING FORMED WITH AN OPEN REGION OPPOSITE A PORTION OF SAID ELECTRODE, A METALLIC MEMBER ADJUSTABLY MOUNTED AT SAID OPEN REGION IN CAPACITIVE RELATION WITH SAID ELECTRODE PORTION, SAID LAST MENTIONED CAPACITATIVE RELATIONSHIP PROVIDING ADDITIONAL CAPACITANCE CONNECTED BETWEEN SAID FIRST AND SECOND TERMINALS, AND MEANS FOR ALTEWRNING THE SETTING OF SAID MEMBER WITH RESPECT TO SAID ELECTRODE TO VARY SAID LAST MENTIONED CAPACITANCE AND PROVIDE A TRIMABLE CONDENSER SECTION IN THE CAPACITOR, THE SETTING OF SAID MEMBER VARYING THE OVERALL CAPACITANCE ESTABLISHED BETWEEN SAID FIRST AND SECOND TERMINALS.