Anti backlash and treadle bar linkage system

Details Anti backlash and treadle bar linkage system Anti backlash and treadle bar linkage system

1975-05-02

1976-06-15

Gensler, Paul L.

Tuners

Push button and/or lever-type mechanically operated tuner

74 1033, 74409, H03J 532

Patent

active

039640019

ABSTRACT:
In a pushbutton type tuner assembly for a radio receiver the treadle bar drive gear, which is coupled to the manual tuning knob through the crown gear and the clutch mechanism, is biased into meshed relation with the treadle bar gear through a pair of lever arms mounted for pivotable movement about fixed pins, and a pair of springs. With the end of the treadle bar gear shaft supported in an aperture in the side wall of the tuner, the first lever arm applies a moment to the treadle bar shaft through the bias of a spring secured to the front wall of the tuner, thereby holding that shaft tightly against the supporting aperture wall. The second lever arm applies a moment to the pinion gear shaft through the bias of the second spring which couples the two lever arms together and adds to the moment of the first spring. The two moments provide balanced radial forces on the gears which eliminate backlash and maintain the two gears in a properly meshed relation.

REFERENCES:
patent: 2397777 (1946-04-01), Colman
patent: 3635097 (1972-01-01), Mears, Jr.

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