Automatic Switch Co. v. Cutter-Hammer Mfg. Co.

TOWNSEND, Circuit Judge.

Complainant by its bill seeks an injunction and accounting, alleging infringement of its patent No. 499,769, granted June 20, 1893, to G. H. Whittingham for a regulator for electric motors.

The specification states that the alleged invention—

“Relates to an automatic switch for protecting the armature of an electric motor, when the current is shut off and suddenly turned on again. If a full current be turned into a motor when at rest, the quantity of current will be so great as to burn the insulation by heating the wires of the armature, and the armature rendered unfit…