An opportunity will be afforded next October for any of the crack British yachts to redeem the national laurels of Old England, which were lost in the race in which the " America " was the declared victor. The New York Yacht Club has offered a purse of $500, to be sailed for on the 18th of October next, over the usual route in our harbor. The prize is open for the yachts of all nations, and our friends across the Atlantic are affectionately invited to participate with us on that expected trying and joyful occasion. We have received a letter from Mr.EWilson inventer ot the tunnelling machine, which he says is successful, in contradiction to the extract in the " Scientific American " of the 5th inst. We will present the substance of his letter next week. List of Patent Claims FOR THE WEEK ENDING FEBRUARY 8, 1853. Purifying Fatty MattersBy J. B. Moiuier & P. H, Boutiguey, of Paris, France. Patented in France, Nov. 14, 1849 : We claim the introduction and mingling of a current or currents, of sulphurous acid gas, with mixtures of fatty acids and alkalies, preparatory to the process of being converted into candles, tapers, and articles for burning, thereby rendering such mixtures of a superior quality, and causing them to burn with a stronger) clearer, and brighter light. Hot Air FurnacesBy N. A Boynton, of Boston, Mass : I do not claim a hollow ring radiator placed over, and made to communicate with the chamber of combustion; but I claim the hollow wheel radiator, made with a hollow rim, hollow spokes, a hollow hub (open at top and bqftom), and a valve and valve seat so made and applied to the hub that when the valve is closed it shall cause the heat and volatile products of combustion pass through one or more of the arms and into and through the hollow rim, out of the said rim, through the other arm or arms, into the hub and over the valve, and also so that when the said valve is opened the heat and volatile products of combustion may pass directly up through the hub, without first calculating through, the hollow arms and rim, as specified, Centre-Board and Kudder for Shoal Watiie VesselsBy Geo. Chase, of Prudence Island, R I. I am aware that one rudder, made to slide within the other, and attached to a centre-board, has been used, so that one shall rise with the other, but in this case there is no indication by which it can be known, when the sliding rudder is up or down, and when used. I claim attaching the rear end of the movable centre-board and the rudder to the sliding stern post, so that the said centre-board stern post, and rudder, may be raised or lowered together, substantially as described, and by which means I only use a single rudder, whose position can always be known by the height of the stern post to which it is hung, as also that of the centre-board, the sliding stern post serving as an indicator of the positions of both. Hanging Farm GatesBy John Filson, of Mil-roy, Pa. : I claim the lower double-jointed hinge, in combination with the apparatus attached, and constituting the upper hinge, as described, for the purpose of holding the gate at any inclination required, fur the purposes set forth. Core-Bars for Casting PipesBy G-eo. Peacock, of West Troy, . . : I claim the core bar having transverse wings or projections of a semicircular or other shape, corresponding to the shape of the article to be cast, aid wings or projections permitting the sand to be rammed, for forming the lower half of the core, and holding or binding the sand to the lower part of the bar, and allowing the upper half of the core to be made by the sweep, as set forth. Also the manner of anchoring the core bar, as described, viz., by means of the metal strips or bridges fitting in recesses in the upper surface of the core-bar, said bridges resting upon wooden supports, and having anchor rods bearing upon their upper surfaces, the liquid metal burning out the wooden supports and allowing the core to be withdrawn, by which means the core is prevented from being raised or forced upward by the liquid metals, as it is poured iuto the mould, and thus enabling pipes to be cast of any desired length. Alse the manner, substantially as described, of connecting or jointing the core bars, for forming cores for elbows or branch pipes, by means of wooden wedges, which are the means of holding the bars together while the core is being formed, said wedges being burnt out by the liquid metal, when poured into tbe mould, and allowing the cores to be withdrawn, [See engraving of this apparatus in No. 13, this vol. Sei. Am. Moulds for Uniting Steel to Cast IronBy Chas. Peters, of Trenton, N. J. : I claim the use of a solid base to moulds, in which steel or wrought-iron is to be welded to cast-iron, with an aperture in the same, so that bymeans thereof the said steel or wrought iron can be subjected to the heat of the furnace while in the mould. i WinnowersBy or. F. S. Zimmerman, ofOharles-town, Va. : I claim the invention, use, and application of the perforated vibrating table, arrangedto a sloping bottom or platform, tbe parallel saw-like strips or strawpushers, combiued with an oscillating rake and straw beaters or curved prongs, the whole combined and working with the oscillating hinged standard, and suspending straps, substantially as set forth. j I do not, however, claim the invention of a combined threshing, separating, and wianowiag machine, but only such parts as are set forth. Gas MetersBy . . Hallam, of New Haven, Ct,, and T. B. Barnard, of Brooklyn, . . (assignors to J3. R Hallam, of New Haven, Ct : We claim the method of constructing meters with one cylinder working within another, so that the gas passes alternately into the inner cylinder, and out of the space above it, and then out of the inner cylinder, while the supply enters the space above it, the gas being changed in its course or direction by valves, as described. Surgical Instruments for the Ear, &c By H- Le Riemoodie, of New Orleans, La. Ante-dated Oct 23, 1852; I claim the construction of an instrument for examining the interior of the ear, nose, eye. or otherpart of the human system, by the com-! bination of the reflectors, the lens, case, tubes, and lamp, as specified.