Fine tuning drive which clutches automatically on slight turning of vernier knob anddeclutches automatically on excessive turning

Claim 1

A TELEVISION TUNER HAVING A PLURALITY OF CHANNEL SELECTION POSITIONS INDIVIDUALLY SELECTABLE THROUGH ROTATION OF THE CHANNEL SELECTOR SHAFT, COIL ARRANGED AT EACH OF SAID CHANNEL POSITIONS FOR TUNING OF THE ASSOCIATED TUNER CHANNEL CIRCUITRY, A SLUG FOR EACH OF SAID COILS ARRANGED ABOUT THE AXIS OF SAID SELECTOR SHAFT AND MOUNTED FOR ADJUSTABLE INDUCTANCE COACTION WITH ITS ASSOCIATED COIL, SAID SLUGS BEING INDIVIDUALLY LONGITUDINALLY DISPLACEABLE, GEAR MEANS AFFIXED TO EACH OF SAID SLUGS AT THE EXTERIOR END THEREOF, A PRESET TURNING SHAFT FOR INDIVIDUAL ADJUSTING THE TUNING POSITION OF SAID SLUGS WITH THEIR RESPECTIVE COILS, DRIVE GEAR MEANS ENGAGEABLE WITH THE RESPECTIVE SLUG GEAR MEANS OF THE COIL POSITIONED FOR THE SELECTED CHANNEL, SAID DRIVE MEANS BEING DISPOSED AND SUPPORTED RADIALLY, SAID DRIVE MEANS BEING DISPOSED AND MECHANISM COUPLED TO SAID PRESET TUNING SHAFT FOR ROTATING SAID DRIVE GEAR MEANS AND ENGAGING IT WITH THE POSITIONED SLUG GEAR MEANS IN EITHER ROTATIONAL DIRECTION AND THEREBY CONTROLLABLE DISPLACE THE SLUG OF THE POSITIONED COIL IN EITHER LONGITUDINAL DIRECTION, SAID MECHANISM INCLUDING BIASING MEANS FOR NORMALLY HOLDING SAID DRIVE GEAR MEANS DISENGAGED FOR SAID SLUG GEAR MEANS WHILE SAID TURNING SHAFT IS RELEASED, WHEREBY THE TUNER CHANNEL CIRCUITS ARE HELD TUNED CORRESPONDING TO THE SLUG POSITIONS PRESET THROUGH SAID TUNING SHAFT AND MECHANISM