Laminated rotor structure for variable capacitors

Claim 1

A TRIMMER CAPACITOR COMPRISING IN COMBINATION, A ROTOR STRUCTURE, A STATOR ELECTRODE AND SUPPORT MEANS FOR SUPPORTING SAID ROTOR STRUCTURE AND SAID STATOR ELECTRODE; SAID STATOR ELECTRODE COMPRISING A FLAT CONDUCTIVE MEMBER SECURED TO ONE SURFACE OF SAID SUPPORT MEANS ; A ROTOR STRUCTURE COMPRISING A SUBSTANTIALLY HOMOGENEOUS MASS OF CERAMIC MATERIAL HAVING A DISC-SHAPE; AND A SHAPED MATERIAL HAVING A CENTRAL OPENING THEREIN; AND A SINGLE LAYER OF CONDUCTIVE MATERIAL EMBEDDED IN SAID CERAMIC DISC; SAID CONDUCTIVE LAYER BEING IN A PLANE PARALLEL TO THE TOP AND BOTTOM SURFACES OF SAID CERAMIC DISC; SAID CONDUCTIVE LAYER HAVING A SEMICIRCULAR SURFACE SHAPE; AND CONDUCTIVE LAYER BEING AT AN AXIAL POSITION IN SAID DISC CORRESPONDING TO THE ORDER OF ONE-TENTH THE THICKNESS OF SAID DISC; ROTATIONAL SUPPORT MEANS ROTATABLY CONNECTING SAID ROTOR STRUCTURE TO SAID SUPPORT MEANS; THE BOTTOM OF SAID DISC CLOSEST TO SAID CONDUCTIVE LAYER IN SAID DISC DISPOSED ADJACENT SAID FLAT CONDUCTIVE MEMBER AND SPACED THEREFROM BY SAID ORDER TO ONE-TENTH THE THICKNESS OF SAID DISC; AND FIRST AND SECOND TERMINAL MEANS INSULATED FROM ONE ANOTHER AND ELECTRICALLY CONNECTED TO SAID STATOR ELECTRODE AND TO SAID CONDUCTIVE LAYER IN SAID DISC, RESPECTIVELY.