Page:Federal Reporter, 1st Series, Volume 8.djvu/338

 32i FEDKBAL REPORTER. �a chamber, from which it is condueted by a pipe into the barrel to be pitched, -w'hereby the inside of the barrel is heated, so that the melted pitch ean be quiokly and evenly spread over the whole inside. �It is claimed by the complainants that the essential priuciple in- volved in their patent is the burning out of the oxygen from the air driven by the blast through the fire, so that, although it passes into the cask heated to a very high degree, it will not burn the inside of the cask; in other wurds, that it involves the process of heating bar- rels for pitching by means of a hot blast which is deprived of its oxygen before use, and thus rendered incapable of injurions burning. �I do not consider it necessary to diseuss this question, for, in my view, the Krausch machine operates upon a different principle. It consista of a furnace or fire-box, containing a coil of steam-pipes so arranged that the steam passing through the pipes will be. super- heated. This superheated steam is let into the barrels, and beats the inside so as to melt the pitch, so that it can be evenly distributed or coated over the inside. The fire in the fire-box is stimulated or kept going by a steam exhaust, which passes out of the top of the box so as to induce a blast through the fire, and the pipe used for letting the steam into the large casts is so arranged that it passes through a larger pipe from the upper part of the fire-box over the grate, and which might possibly, by reason of the draft occasioned by the jet of steam, carry into the cask some of the burnt air and products of combustion which are contained in the fire-box above the fire. But it is obvious that this bumt air would be only a very small part of the means by which the heating is accomplished, and is not the main process by which the heating is secured. I think, tHerefore, the de- fendant does not infringe complainants' patent by the use of the Krausch machine. �The complainants' bill will therefore be dismissed, on the ground that no infringement of their patent is shown. ��� �