A sine function resistor

This paper describes a sine function resistor of rather unusual design. A linear resistance card bent to circular shape about an eccentric frame of very simple construction is employed to obtain a resistance variation that is within very close limits of true sine values. This resistor should find application in certain computer circuits, particularly in those of the balanced-bridge type. The same theory is also applied to the function (1 - sin φ)i (i = 1/2, 1).