Circle F. Mfg. Co. v. Leviton Mfg. Co.

SWAN, Circuit Judge.

This is a suit for infringement of patent No. 1,931,621 issued October 24, 1933, to Carl M. Petersen, assignor to the plaintiff. The patent is for a “Fixture Switch” for electric lighting fixtures. It is of the type known as an outside canopy switch, which means that the switch mechanism is outside instead of inside the wall-plate or fixture “canopy,” upon which the switch is to be mounted. The plaintiff’s commercial embodiment of the alleged invention is a small, compact switch in which the switching mechanism is arranged entirely within the rotatable cap by the turning…