Star Brass Works v. General Electric Co.

DAY, Circuit Judge.

This case involves the validity of the eighth claim of the Anderson patent, No. 412,155, for improvements in trolleys for electric railway service. A consideration of the record in this cause shows that with the advent of the under-running trolley, now in common use in propelling street cars, there arose the necessity of deviling a means by which the current of electricit}r could be readily and safely transmitted from the conducting wire down the swinging arm of the trolley, thence to the motor beneath the cars. The top of this swinging arm had been provided with a frame or…