Variable inductor and capacitor tuning apparatus

Claim 1

RESONANT CIRCUIT APPARATUS COMPRISING A BASE, A PAIR OF DIELECTRIC END PLATES MOUNTED ON SAID BASE IN SPACED PARALLEL ARRANGEMENT, A PAIR OF METAL END BLOCKS CARRYING AXIALLY ALIGNED STUB SHAFTS JOURNALED IN SAID END PLATES, A PAIR OF DIELECTRIC CONNECTING BARS ATTACHED TO THE SIDES OF SAID END BLOCKS IN SPACED PARALLEL ARRANGEMENT, A METAL INDUCTOR COIL WOUND AROUND SAID DIELECTRIC CONNECTING BARS AND CONNECTED AT ITS OPPOSITE ENDS TO SAID METAL END BLOCKS, RESILIENTLY BIASED CONTACTS CONNECTED TO SAID END BLOCK, METAL CONTACT WASHERS ON SAID DIELECTRIC END PLATES AND ENGAGED BY SAID CONTACTS, A METAL GUIDE BAR CONNECTED TO SAID DIELECTRIC END PLATES OUTSIDE SAID COIL AND PARALLEL TO THE AXIS OF SAID SHAFTS, A METAL U-SHAPED SHORTING TAP STRADDLING SAID BAR WITH THE BIGHT OF THE USHAPED TAP BETWEEN THE BAR AND THE COIL, METAL SPRING FINGERS ATTACHED TO EACH LEG AND THE BIGHT OF THE SHORTING TAP IN SLIDING ENGAGEMENT WITH THE SHORTING BAR, A USHAPED FOLLOWER ATTACHED TO THE BIGHT OF THE SHORTING TAP AND STRADDLING A TURN OF SAID COIL, A BOWED SPRING FINGER ATTACHED TO THE BIGHT OF THE SHORTING TAP, AN ELECTRICAL CONTACT BRUSH ON EACH END OF SAID BOWED FINGER IN SLIDING ENGAGEMENT WITH SAID COIL, A VACUUM CONDENSER COMPRISING A MOVABLE SET OF CYLINDRICAL PLATES TELSCOPICALLY RECEIVABLE WITHIN A STATIONARY SET OF CYLINDRICAL