Control knob mounting assembly

Claim 1

IN A CONTROL KNOB MOUNTING ASSEMBLY, THE COMBINATION OF A KNOB BODY OF MOLDED PLASTIC MATERIAL HAVING AN OPEN SPACE EXTENDING AXIALLY THEREOF FROM AN END THEREOF, SAID OPEN SPACE HAVING A CLOSED END WALL AND SIDE WALLS CONCENTRIC WITH THE AXIS OF THE KNOB BODY AND HAVING OPPOSITELY DISPOSED SLOTS FORMED IN SAID SIDE WALLS EXTENDING PARALLEL TO THE AXIS OF THE KNOB BODY, SAID SLOTS EACH LEAVING AN INNER WALL FACING RADIALLY INWARD TOWARD THE INNER WALL OF THE OTHER SLOT, A ROTATABLE METAL SHAFT EXTENDING FROM AN ELECTRIC CONTROL DEVICE TO BE CONTROLLED BY ROTATION OF THE SHAFT, AND A PAIR OF PRONGS MOUNTED TO SAID SHAFT ON OPPOSITE SIDES THEREOF AND HAVING FREE END PORTIONS EXTENDING BEYOND THE END OF SAID SHAFT, SAID OPEN SPACE IN THE KNOB BODY EXTENDING SUBSTANTIALLY BEYOND THE END OF SAID SHAFT AND INTERMEDIATE SAID EXTENDING PRONGS TO IMMERSE THE FREE END PORTIONS OF SAID PRONGS IN THE AIR IN SAID OPEN SPACE, SAID PRONGS BEING STEEL LEAF SPRINGS BIASED TO DIVERGE FROM EACH OTHER AND FROM THE AXIS OF SAID SHAFT AND YIELDABLE TO FLEX IN OPPOSITION TO SAID BIAS, SAID PRONGS BEING POSITIONED IN SAID SLOTS, RESPECTIVELY, TO KEY SAID SHAFT TO SAID KNOB BODY AND SAID SHAFT EXTENDING INTO SAID OPEN SPACE IN ENGAGEMENT WITH SAID CONCENTRIC SIDE WALLS TO CENTER THE KNOB BODY IN RESPECT TO SAID SHAFT, THE WALLS OF SAID SLOTS ENGAGING AND FLEXING THE SPACED FREE END PORTIONS OF SAID PRONGS, RESPECTIVELY, IN OPPOSITION TO THE BIAS THEREOF TO PROVIDE FOR RESILIENTLY YIELDABLE PRESSURE OF SAID PRONGS AGAINST THE SAID INNER WALLS OF THE RESPECTIVE SLOTS TO FRICTIONALLY RETAIN THE KNOB BODY IN POSITION RELATIVE TO SAID SHAFT, AT LEAST ONE OF SAID PRONGS ABUTTING SAID CLOSED END WALL OF SAID OPEN SPACE TO LIMIT MOVEMENT OF SAID KNOB BODY TOWARD SAID SHAFT.