George Shiras, Jr.

“ And when we turn to the evidence of the appellant's expert, Cunningham, we find that in analyzing the Boyd machine he dwells chiefly on the functions of the stop and of the catch, as constituting its meritorious features, and that the effect and purpose of his testimony, as likewise that of Boyd himself, are to show that there are a similar stop and catch in the defendants' carrier. ”

“ It will even be noticed that the portion of the stop below the lugs is rounded, and adapted to coact with the lugs upon a single inclined or lower ledge, and independent of an upper ledge. This fact is fully demonstrated by operating defendants' catch block upon the cam plate, upon which there is no upper ledge. Thus the stop of Strickler is, and may be, a differently constructed device from that of Boyd, and such a construction as leaves entirely out a leading essential element enumerated in the second claim of the Boyd patent. ”

“ Defendants' catch block has only sufficient space between its lugs and its opposite lower portion to allow it to play freely up and down the incline of its stop, and would, therefore, work just the same upon its stop without the upper ledge as it would with it. ”