19 F. Cas. 906 | U.S. Circuit Court for the District of Southern New York | 1869
If the patent be valid, the infringement is not denied. The defence is put upon the ground of a want of novelty in the invention. What is adduced to defeat the patent is, a publication in a work in German called the “Schauplatz,” published at Weimar, in Germany, in 1847. The text of the publication is accompanied by a drawing, and is this, as translated: “Mr. Cavé uses for his blowing machines a very ingeniously arranged piston, whereby the leather packing becomes unnecessary, which is perfectly air-tight, has no friction, does not become heated, and requires no cost for keeping it in order. This piston consists of a hollow cast-iron ring, which has a diameter about two or three millimeters less than the cylinder, and whose outer surface has the greatest practicable number of annular and square sectioned depressions a, b, c, d. If now, for example, a piston arranged in this way goes upward and compresses the air which is found above it, and then this air, in part, presses in between the walls of the cylinder and the outer wall of the piston, having reached a, it freely expands, so that it compresses the air therein contained, and then loses for once a part of the force by which it had been pressed in, by which its motion is hindered, and there is opposed to it on the other side, to which it tends to go, a certain resistance. It follows from-this, that the air pressed into a works backward, one after another, into the grooves, b, c, d, with a force which constantly decreases and which, for a sufficient number of grooves can become zero. Therefore, theoretically oonsidered, the number of grooves must stand in direct proportion to the pressure. Mr. Cavé has employed these pistons for very many blowing cylinders, and even, too, for one of three metres in diameter. He has made careful experiments with this contrivance, and the results obtained agree in all respects with the theory. An essential condition for the employment of this piston is a perfect centricity 'of the cylinder, a condition which we can now easily obtain by means of the vertical boring machine.”
The first question to be decided is — what is the proper construction of the plaintiff’s patent? If it claims merely the arrangement of the grooves in one of the two surfaces, one of the two surfaces being a moving surface, then, undoubtedly, the arrangement of Cavé is an answer to the patent. But the specification says, that the inventor does not claim “the grooved surfaces in themselves.” Nor does he claim the use of the grooved surfaces in connection with air, for, the specification states that they have “been used in connection with air engines.” The inventor, from the language of his specification, may fairly be said to have had in view the apparatus of Cavé, which used grooved surfaces, in an air engine. He puts his invention, however, on an entirely different point, and claims that, notwithstanding Cavé, he has made a patentable invention. He says that he has discovered the fact that steam may be made to pack in, and of, itself, or to become what he calls “self-packing”; that, prior to his invention, it had always been supposed, ever since steam had been introduced as a motive power, that two contiguous surfaces could be rendered steam-tight only by actual contact; that, consequently, all steam engines had depended, for steam-tight moving joints, on the contact of smooth surfaces, or on elastic packing set steam-tight against its adjacent surface; that, in carrying out this idea, great varieties of packing had been devised at great expense; and that he first discovered the fact that steam, when introduced into small grooves in one of two contiguous surfaces, will itself form a packing without the surfaces being actually in contact. It is not attempted to be shown, on the part of the defence, that these allegations of the specification are not true, otherwise than by introducing the description and drawing of the Cave apparatus. But it is
The claim is to “the method, herein described, of causing steam to become a packing to itself, in steam cylinders, or other parts of steam machinery, by allowing the steam to act in one or more grooves, substantially as specified.” It is not possible to' mistake the tenor and purport of this claim, when it is read in connection with the rest of the specification. It is a claim to an art or process. It is not a claim to the grooved surfaces. But it is a claim to the process of the self-packing of steam, used in steam machinery, when effected by allowing the steam to act. in one or more grooves, as described in the specification. Gale, undoubtedly, was the first to discover that steam could be made to pack itself, and that it could be made to do so by causing it to act in the way described, in one or more grooves. The grooves, used in an air engine were, indeed, old. But it by no means followed, because air would work successfully in the apparatus of Cavé, that steam could be made to pack itself, or to do so by means of grooves, or to do so in the apparatus of Cavé. There was voom for experiment as to the capability of steam to act in that way, and as to the character of the grooves to be used, and as to what space might or might not be left between the contiguous surfaces. And it does not detract from the novelty or patentability of the invention, that, in carrying it out in practice, the use of grooves like those in Gavé’s apparatus was found beneficial. The claim is not to all methods of causing steam to become a packing to itself, in steam machinery, but to the method described in the specification, whereby the property of steam discovered by Gale is made to subserve a useful purpose, by being carried into effect in a practical mode. The newly discovered property of steam, and the practical adapta - tion of it to a useful end, by the means described, is the invention made and claimed.
It is difficult to distinguish this case from, that of the Hanson patent for making lead pipe, which was sustained as a valid patent,, by the supreme court, in Le Roy v. Tatham, 22 How. [63 U. S.] 132. The Hansons discovered that lead, when recently set and solid, but still under heat and extreme pressure, in a close vessel, would reunite perfectly after a separation of its parts. Availing themselves of this property in lead, the-inventors succeeded in making by machinery, at a reduced expense, lead pipe of a better quality than had before been known. The claim of the patent was to the combination of machinery employed, “when used inform pipes of metal under heat and pressure, in the manner set forth, or in any other manner substantially the same.” The machinery used was shown to be, in principle, substantially the same with machinery which' had before been - used to make macearon!, and with machinery which had before been used to make clay pipe. The claim was stated by the court to be a claim to the machinery only when used to form pipes of metal under heat and pressure; and it was-sustained by the court, against the objection that it only claimed the application of an old machine to a new use, or to produce a new result. The claim in the Hanson patent would have been the same, to all intents, if it had-claimed the method of causing lead to separate and reunite, at a welding heat, under pressure in a close vessel, by the use of the machinery described, to form lead pipe, in the manner set forth. The claim of the Gale patent would be the same, in effect, if it were to claim the arrangement of the grooves, substantially as specified, when used in connection with steam, to cause the steam, by acting in the grooves in the manner described, to become a packing to itself in steam machinery.
I am satisfied that the Gale patent is valid, that the claim is sustainable, that the invention claimed is new and useful, and that the plaintiff is entitled to a verdict for $50, on the two machines proved to have been used by the defendant, the license fee fixed by the plaintiff being shown to be $25 on each machine.
