Mechanism for static convergence devices for color television picture tubes

An improved color television picture tube static convergence device having a mounting sleeve for attachment to the neck of said tube, having at least one pair of magnetic rings rotatably mounted on said sleeve, each of said magnetic rings constructed and assembled with bevel gears located on their periphery facing each other, and having a rotatable rod radially directed with one end of said rod affixed to a knob and the other end of said rod affixed to a pinion engaged in said bevel gears of said magnetic rings, the improvement comprising non-rotatable non-magnetic rings mounted on said sleeve on either side of said pair of magnetic rings, each of said non-magnetic rings being provided with at least one circular groove located near the periphery of said ring on at least one side of said ring, a guide-member having bent ledges affixed thereto at least one point on each side thereof, said guide-member slidably mating with said grooves, said guide member being provided with a hole rotatably positioning said rod and pinion with respect to said bevel gears.