Abstract: The channel selector shaft of a 70 channel mechanically detented UHF tuner is provided with mechanical stops which prevent the shaft from moving above UHF channel No. 69 so that the upper twenty-four UHF channels are unused. Also, a dial driving arrangement is provided for driving an expanded UHF dial having only 56 channel indicia so that the 56 channel indicia cover substantially the same area on the dial as the 70 channel indicia of prior art arrangements.

Abstract: An indication element driving device is incorporated within a tuning apparatus. The driving device comprises a casing of a substantially cylindrical shape with both end faces covered, a driving shaft is rotatably supported passing through the covered end faces of the casing and is adapted to be selectively shifted in its axial direction to a first and second position, and briefly rotated upon a tuning operation. A flywheel disposed coaxially with the driving shaft inside the casing and supported rotatably with respect to said driving shaft. A pulley disposed coaxially with driving shaft at an extended part thereof extending and projecting outside the casing has fine cord wound therearound. A first clutch is operable when the driving shaft is set to the first position, a second clutch is operable when the driving shaft is set to the second position.

Abstract: A universal T.V. channel knob has a channel indicator skirt slidably receivable on a cylindrical, molded synthetic plastic knob shaft and relatively attachable thereto in an infinite number of rotative positions to provide for universal replacement usage. A metal, radially depressable slide pin is provided for securing the dial skirt in adjusted rotative position with respect to the knob shank with only minimal projection inwardly along its mounting shank, thereby minimizing any possibility of interference with fine tuner knob assemblies and the like that may be coaxially arranged in close proximity behind the T.V. channel knob assembly.