Balance control for use in 4-channel stereophonic system
AssigneeAlps Electric Co., Ltd.
InventorMasao Kasahima
Life of this patent
Estimating the term…
Abstract
A balance control comprises a box-type frame, a plurality of variable resistors individually mounted on each side wall of the frame, the upper plate of the frame having a large hole, a pair of auxiliary plates attached to the surface opposite the upper plate, each auxiliary plates having a receiving hole, the large hole and the two receiving holes forming a space receiving a ball provided with an operating rod. Either of the auxiliary plates is biased by a resilient member to exert a frictional resistance on the ball. Each pair of shafts of the resistors is ganged by a strip having a slot and the end portion of the operating rod is inserted into a hole defined by the slots of the overlapped strips.
Claims4
In combination with a balance control of the type wherein a substantially cubic frame having an upper wall and side walls extending downwardly from the upper wall is provided with a plurality of variable resistors provided with rotary shafts fixed to the side walls, the rotary shafts extending inwardly into the frame, ganging strips secured to the rotary shafts, each of the ganging strips in the shape of an arc and having a longitudinal slot, an operation rod provided with a ball, the ball mounted on the upper wall, the operating rod being inserted through the slots of the ganging strips to move the strips and thereby rotate one or more of the rotary shafts of the variable resistors, the improvement which comprises:
- a. the opposite ends of each of the ganging strips provided with holes, the holes of each ganging strip being of a size different from the holes of the other remaining ganging strips;
- b. the end portion of each of the rotary shafts being inclined so as to be smaller toward its outer end;
- c. the ganging strips being secured to the rotary shafts by inserting the end portion of the rotary shafts into the holes of the ganging strips to the extent allowed by the size of the hole, whereby the radius of the arc of each ganging strip will be determined by the size of the hole of the ganging strip thereby permitting each ganging strip to have an arc of a different radius so that the ganging strips do not come into physical contact with each other although the end portions are the same.
Dependencies are inferred from the claim text.