Fine tuning mechanism for television tuners

Claim 1

A TELEVISION TUNER, COMPRISING A CHANNEL SELECTOR SWITCH; AN OPERATING SHAFT FOR THE SWITCH; CIRCUITRY FOR EACH CHANNEL, INCLUDING A COIL AND AN AXIALLY ADJUSTABLE TUNING CORE; MEANS FOR AXIALLY ADJUSTING THE POSITION OF THE CORE; A FINE-TUNE ASSEMBLY INCLUDING A PINION TO DRIVE THE CORE ADJUSTING MEANS, AND AN ACTUATING GEAR ON A COMMON SHAFT WITH SAID PINION, AND A PLATE FOR SUPPORTING SAID COMMON SHAFT, SAID PLATE BEING NORMALLY RADIALLY SPACED FROM THE AXIS OF THE SWITCH-OPERATING SHAFT; A PRESET FINE-TUNING SHAFT CONUCENTRIC WITH THE OPERATING SHAFT FOR THE SWITCH; A DRIVE GEAR ON SAID FINE-TUNING SHAFT FOR DRIVING THE ACTUATING GEAR OF THE FINE-TUNE ASSEMBLY; AND MEANS SUPPORTED AND DRIVEN BY THE FINE-TUNING SHAFT FOR FIRST FRICTIONALLY ENGAGING AND SHIFTING THE SUPPORTING PLATE OF THE FINE-TUNING ASSEMBLY RADIALLY- TO A POSITION AT WHICH THE DRIVE GEAR ON THE FINE-TUNING SHAFT IS MESHED ON THE ACTUATING GEAR OF THE FINE-TUNED ASSEMBLY, AFTER WHICH THE FINE-TUNED SHAFT CAN OPERATE THE ACTUATING GEAR TO DRIVE THE PINION TO ADJUST THE POSITION OF THE CORE TO ACHIEVE DESIRED FINE TUNING.