60 F. 417 | 7th Cir. | 1894
(after stating the facts). The bearing of the prior art upon the question of novelty and invention in Cor-bin’s combination may be illustrated by supposing two of the older machines to be employed side by side, — the wheel harrow of Bayless, without a lever, and adjustable only by means of a movable bolt, and the revolving spader or cultivator of Winters, with a lever mounted on the tongue, ready for the hand of the driver in his seat. In that situation the advantage of one driver over the other in respect to the easy and ready control of his machine would be clear enough, but not more obvious than the means of correcting the inequality. So manifest, indeed, is the impossibility of finding invention in the mere fact of a lever mounted on the tongue of a wheel harrow to be used in controlling the alignment of the disk gangs that it is not insisted upon; but it is now contended that it is not a fair presentation of the problem to consider only whether a mechanic could place an ordinary lever, as Corbin placed it, in connection with the disk gangs; that Corbin, as he was compelled to do, went further, and determined first the possibility, as against the draft of the team, of adjusting the gangs while the machine was in motion, then the means of doing it, and thereby achieved the new result that, concurrently with the making of adjust-' ments of the gangs in motion, the depth of the resulting cut is illustrated. This argument admits by implication that it would
But the entire argument for the appellants proceeds on the erroneous assumption that a machine or mechanical combination which, in itself contains no novelty amounting to invention may be patentable because of some new use or result which is accomplished; a proposition which, as we have seen, leads to the inadmissible Conclusion that for one use or purpose a device may he public property and for another use may be the subject of a patent. On the contrary, it is well settled, we suppose, “that a patent for a machine covers its use for all purposes, whether anticipated by the pat-entee or not, and that the functions or methods of operation of me