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| Most of the patents prior to 1836 were lost in the December 1836 fire. Only about 2000 of the almost 10000 documents were recovered. For this patent, only the drawing is available.From the December 1829 Journal of the Franklin Institute Vol. 9, pages 404-405. "For a Machine for Planing Timber, boards, plank, clapboards, window blinds, sash-stuff, cabinet work, tongueing and grooving, straightening the edges, and reducing to a thickness and width, all kinds of wood for various uses; called the 'Improved Circular Planing Machine;' Uri Emmons, New York, September 10."On the 25th of April last, a patent was obtained by Mr. Emmons for a machine for planing, tongueing, &c., which he called the Cylindrical Planing Machine, and which we noticed as being similar to that for which Mr. Woodworth had obtained a patent in December last. In the specification of the present patent, no allusion whatever is made to that previously obtained, and it is, therefore, to be considered as entirely new."The board, or plank, to be planed is fixed upon a sliding plank, or carriage, moved forward by a pinion working in a rack on its under side. The plank is to be held down, whilst planed, by rollers which press upon its surface. There is a cast-iron wheel, the diameter of which must somewhat exceed the width of the stuff to be wrought; this wheel is to move horizontally above the top of the board, its edges are furnished with cogs, by which it is to be turned; near its periphery it is perforated to receive four plane irons, or cutters, which project from the lower side, and are fixed and regulated in their places by means of screws. These irons so fixed, cut by a circular traversing motion. The tongueing and grooving is effected by wheels furnished with cutters on their edges, and adjusted to the width of the stuff, motion being given to these by gearing connected with the circular plane. The claim made, is,"1st. The simple form and construction of the above machine."2nd. The principle of a cast metal circular plane."3d. The principle of running timber over or under the centre of a circular plane, as above described."4th. The driving of the edging, tongueing, and grooving (wheels) by the plane itself, thereby rendering the apparatus simple, cheap, durable, and easily altered, and set, for the different kinds of work."5th. The application of the machine to the foregoing and all other purposes to which the same, as before described, may be made to apply.""Among the many patents which have been obtained, here and in other countries, we apprehend that some will be found, which will interfere materially with some of the principles above claimed. The first claim must be considered as mere surplusage, as it is altogether indefinite. The term principle used in the second and third, is equivocal in its meaning; taken in its most exact acceptation, such a claim would be too broad. We should prefer to read it 'the using of a cast metal,' &c. and 'The running timber,' &c. We have seen revolving planes operating very much upon the principle of these, but the planes were carried by horizontal arms projecting from a vertical shaft, along side of which the timber was made to pass. We apprehend that the running the timber under the centre is new, the plate being supported by a frame, above the board to be planed. Were the plane made of wood, or of wrought metal, would this interfere with the principle of a cast metal circular plane?" |
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