In the next number of the Scientific American, we shall announce the names of the successful competitors for the prizes offered by us for the four largest lists of subscribers. Communications sent to this office without the real name of the author attached, cannot, under any circumstances receive attention. This is a wle common with all editors, and no writer should be ashamed to give his name, as it is always withheld from the public if a request is made to this effect. List of Patent Claims For The Week Ending November 30, 1852. SCREWING BOLTS,By John Caswell, of Syracuse, N. Y. (assignor to A. C. Powell) : I claim, first, the movable ways running inyielding bearings, back and forth, under the machine, and supporting the vise, as set forth. Second, the adjustable stpp or gauge on the side of the friction nut working in contact with the movable finger, or any similar projection in the die chuck. ATTACHMENT FOR CONVERTING THE ORDINARY INTO A TAPER VISE By J. W. Bliss, of Hartford, Conn.: I claim an attachment to the vise, substantially as described and for the purposes Bet forth, which attachment is removable at pleasure, and require no change in the construction of the vise to which it is applied. HOESBy Wm. C. Finney, of Fayette Co , Tenn.: I claim the extension of the blade of the common cotton hoe, upw ji and backward, in a. curve, in such form and manner to enable the laborer, by inserting his instrument and pushing it from him, to remove, by the cutting edge, any grass, weeds, su- perflou:'! plants, 'c., as described. MORTISING MACHI NE SBy JOS. Guil d, of Cincinnati, Ohio : I claim the sliding wrist connected with the chisel and also with the driving power, in the manner described, in combination with the mechanism described, or its equivalent, for sliding said wrist, so that the operator can, during the motion of the machine, vary the depth of cut of the chisel, or cause it to be suspended without disconnecting the driving power. ENDLESS BELTS TO THRESHING MACHINESBy J. R. Moffitt, of Piqua, Ohio : I claim the continuous open apron, having its belt formed of links, whose coga are at one part of. their rotation (in connection with the pinions) , or means of propulsion, and are, at another part of their rotation (in. connection with the rollers or other stationary objects) a. means of agitation of the said apron. PL owsBy F. E. Richardson, of Hicksford, Va.: I claim mounting the double pointed share upon the central shoulder-piece, and fastening the same by a link piece, as described. ROTARY IKKITTING MACHINESBy Horatio G. Sanford, of Worcester, Mass. : I claim the combination of the mechanism termed the stop-motion, with the rotary knitting machinery of the kind, as specified, the object of the stop-motion being to arrest the o]l4lrations of the machine on breakage of the yarn. ROTARY KNITTING MACHINESBy l)avid Tainter, of Woreester, 'MaB\l:: I'do' 1wt the combining one or more draft rollers and a. take;-up roller, or drum, in one frame, which, when put in' rotation, shall carry them simultaneously around with it, so as to draw forwards and wind up ,a rope or cord, or like manufacture, formed of strands twisted together. Nor the application of a take-up roller or mechanism as used on either a common warp or flat braid knitting machine : but I claim to s0 combine a draft and take-up roller, and mechanism for revolving it, with a. rotary series or set of needles and other mechanism of the peculiar kind mentioned for knitting, that such draft roller shall rotate simultaneously, or with the same velocity, with such series of needles, so as to prevent the longitudinal rows of stitches from being produced in helical lines, and the, evil consequences resulting to the fabric therefrom. Also the arrrngement of the draft and take-up mechanism, in connection with the knitting mechanism, supporte d by two separate frames, and also their connection with the mechanism for producing an equal and simultaneous rotation of these frames, all substantially as described, whereby there shall not only. be no connection between the frames to extend through the fabric but no projection from the frames come in contact with the presser, stitch wheels. and cam bar, or their respective supports, during the simultaneous and equaljrotations of both or either of the said frames. COOKING STOVESEly H. J. Ruggles, of West Poultney, Vt, : I claim the combination and arrangement of the front and rear flues and air chamber, as set forth. STONE AND EARTHENWAREBy Jacob &Freeman Wise, of Fredericktown, Pa.: We claim, first, the mode of attaching the mandrel so that it may revolve on its axis, by means of friction with the clay, and at the same time be moved from side to side within the mould. Second, the mode adopted for varying the relative thickness of the different parts of the manufactured article. GENERATING HEATBy Wm, Hartell, of Kensington, Pa , and Jos. Lancaster, of Spring Garden, Pa,: We claim the adaptation of, or rendering available tar as a fuel, for the production of the intense and steady heat required for the melting and manufacturing of glass, by introducing - water or the vapor of water into the furnace in contact or in close proximity, or in combination or mixture with the tar. in the manner set forth. RE-ISSUES. CREAM FREEZERSBy E ber C. Seaman, of Philadelphia, Pa. Originally patented Oct. 3, 1848, and ante-dated April a, 1848 : I claim the arrangement of two scrapers at van angle with the bottom and sides of the vessel, as described, sothat the action of the rotation shall throw the scrapers against the sides and bottom of the vessel. WELDING CAST-IRON TO MALLEABLE IRON OR STEELBy Mark Fisher &Wm. Martin, Jr., of Newport, Me, Criginally patented Oct. 16, 1847 : We claim uniting the steel and cast-iron, as described, by first preparing the steel, in the manner set forth, and then causing the cast-iron to flow over and upon the surface of the steel thus prepared, in the manner and for the purpose set forth. DESIGNS. PARLOR STOVEBy - Axnold, of Providence, R. I. FRANKLIN STOVEBy Saml. F. Pratt, of B oston, Mass. (assignor to Jagger, Treadwell &Perry, of Albany, N. Y.) WINDOW BLINDSBy Nathan Chapin (assignor to Nathan Chapin &J. F. Driggs), of New York City.