White Tool & Supply Co. v. Air Reduction Co.

48 F.2d 720, 9 U.S.P.Q. (BNA) 285, 1931 U.S. App. LEXIS 4281
Court of Appeals for the Sixth Circuit·Decided April 15, 1931·No. No. 5653·Published·Cited by 2 cases

Opinion

MOORMAN, Circuit Judge.

This is a suit for infringement of claims 1, 2 and 4 of the Bueknam patent, No. 1,059,-329, for an apparatus for severing metals by means of gases. The defenses are invalidity and noninfringement. The court below denied both defenses, sustaining all the claims relied upon and holding them infringed.

The patented structure is used for making cuts of any desired form or design in metals of varying thicknesses. It consists of a blowpipe such as an oxyacetylene torch for making the cut, a tracer for following a design or pattern, a supporting structure for the torch and tracer which, when the tracer is moved according to the pattern, will cause a like movement in the torch and the cutting of a like design in the metal. The tracer is propelled by means of gearing which may be operated by hand or motor, the preferred means being a motor. The patent illustrates preferred and certain alternative forms. Claims 1 and 4 call broadly for a combination comprising three elements: (1) Means for delivering jets of gaseous heating and oxidizing agents; (2) means for supporting the jet for universal movement in a plane; and (3) means for propelling the jet-delivering means at uniform speed in any and changing directions. Claim 2 is more limited, calling for “pantographie connections” for producing relative movement between the jet-delivering means and the work in accordance with the movements of the tracer.

The claim of aggregation is based upon the ground that the elements of the claims were old, and that, as brought together, each of them performs its characteristic and well-known function without modifying the action or functions of the others. The elements, it is true, were old in other associations, but we do not find in any of the earlier .patents or [721] older devices a functional or co-operative equivalent of the Bueknam combination. This is evidenced by the favorable reception that the device received from the trade when it was placed on the market. Before Buck-mam entered the field no one had thought of the advantages of a gas cutting torch that could be mechanically propelled at a uniform and regulable rate .of speed. His device embodied elements that brought about that character of operation for the first time, with the result that it was almost immediately accepted by the public and has since dominated the field in which it operates. Considered in this light, we have no difficulty in concluding that it is a true combination.

The object of the invention is not merely to cut metal, but “to secure accuracy, continuity and cleanness of cutting,” and, lacking uniformity of speed, this eould not be done to the high degree that it is done by the device as presently constituted. This element 'is stated in the patent specifications to be of “primary importance.” We do not find that it has been utilized in any of the earlier structures. The Foster patent, No. 978,012, which is perhaps the closest reference, was for an apparatus having a gas-delivering torch mounted on a pantographie machine used for making designs on leather. Undoubtedly this device might have been, reorganized and adapted to the cutting of metal, but it contained no suggestion of uniformity of speed which is the necessary result of the co-operative action of Bucknam’s mechanical means and is itself made an element at least of claims 1 and 4. It was the taking of the well-known older elements of Foster and other devices and combining them with an element not found in any of them that in our opinion constituted the Bueknam invention. Foster, lacking this additional element, does not amount to anticipation. Some of the patents in related arts, such as Palmer, No. 308,-982, for a quilting machine, and Edison, No. 847,746, for an electric welding machine, had mechanical propulsion which may be assumed to have been regulable, but in none of them was uniformity of speed sought or essential in attaining the objects of the patent. Other patents cited cover devices for supporting a movable gas cutting torch. Some of them eould be used to cut circular or curved pieces, but no patent cited except Foster was adaptable to the cutting of the irregular designs and shapes that Bueknam’s device cuts, and, as pointed out, Foster lacks the important feature of uniform speed control. None of the prior patents suggests this element, and none, in our opinion, anticipates claims 1 and 4. The prior publications relied upon show nothing that is not shown in the earlier patents.

i The claim of anticipation by prior public use is based on the use of the American Oxhydric machine. This machine comprised a slide movable longitudinally of the supporting base of the machine, on which there was a cross slide which carried a cutting torch with means manually to operate and control the movement of both slides so as to effect a movement of the torch in any direction in a plane. The machine had no tracer, and the slides were operated by separate screws. The line of the cut was marked out on the piece to be cut, and the operator was required to watch the progress of the cutting jet and move the torch to cause it to follow the line. The machine seemed to have been devised as a straight line cutter. Unless operated by an expert, it would seem to have been unfitted for cutting irregular shapes such as are cut by the Bueknam machine. In any event, it had no efficient means for propelling the cutting tool at a uniform speed. We think its analogy to the patent in suit is no closer than some of the patents cited in the prior art.

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White Tool & Supply Co. v. Air Reduction Co., 48 F.2d 720, 9 U.S.P.Q. (BNA) 285, 1931 U.S. App. LEXIS 4281 (6th Cir. 1931).

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