Adjustable capacitors

Claim 1

IN A CAPACITOR STRUCTURE, A PAIR OF METALLIC STRIPS ARRANGED PARTIALLY PARALLELLY OVERLAPPING ON ONE OF THEIR ENDS, FORMING A CONDENSER SPACE THERE-BETWEEN OF RELATIVELY LOW CAPACITANCE, AND FORMING BENT DOWN TERMINALS AT THEIR OPPOSITE ENDS; THE UPPER ONE OF SAID STRIPS BEING MORE FLEXIBLE THAN THE OTHER AND THE LOWER ONE OF SAID STRIPS HAVING AN ADJUSTABLE SCREW BOLT THREADED THEREIN AT ITS OVERLAPPING END; SAID SCREW BOLT EXTENDING FROM SAID LOWER STRIP THROUGH SAID CONDENSER SPACE AND SAID UPPER STIP, FORMING A SCREW HEAD PROJECTING THEREFROM; AND A WASHER TYPE CAPACITOR OF SUBSTANTIALLY HOMOGENEOUS STRUCTURE AND OF RELATIVELY HIGH CAPACITANCE HAVING A CONDUCTIVE COATING ON ITS TOP SIDE IN CONTACT WITH SAID SCREW HEAD AND ON ITS BOTTOM SIDE ANOTHER CONDUCTIVE COATING INSULATED FROM SAID SCREW BOLT BUT IN CONTACT WITH SAID UPPER STRIP; SAID WASHER TYPE CAPACITOR BEING SO ARRANGED AS TO PERMIT ADJUSTMENT OF SAID LOW CAPACITANCE SPACE BY ROTATING SAID SCREW HEAD SUBSTANTIALLY WITHOUT AFFECTING THE CONTACT BETWEEN SAID COATINGS AND SAID ELECTRODE STRIP AND SCREW HEAD RESPECTIVELY.