The Committee of the American Institute has reported on the Ray Premiums; date of Report March 15, 1853. Names of the Com mittee ; Geo. Stark, M. Sloat, W. Cummings, J. R. Trimble, F. Hungerford. There were four prizes offered, two of which only have been decided upon, viz., "the railroad brake " for which the prize of 400 has been awarded to T. A. Stevens, of Burlington, Vt. The prize for a "night seat for cars," $300, has been awarded to Samuel Hickox, of Buffalo, N. Y. The prize of $1,500, for the best in vention to prevent railroad collisions, the breaking of railroad axles, and the prize of $800 for the best invention to exclude dust from cars, they did not decide upon. The reasons given by the commitee are: " Doubts of their utility (the inventions exhibited) for actual service." The excuse offered by the Committee for taking such a long time to make the report, is that the private business of the members made it very difficult to get a sufficient num ber of them together. And so out of the sum of $3,000, which was offered as prizes, the Institute has awarded $700. This brake was illustrated on page 132, Vol. 7, Sci. Am. List of Patent Claims Issued from the United State Patent Office FOR THE WERK ENDING MARCH 15, 1853. Tr RNING LATHES—By Warron Aldrich, of Low ell, Mass.: I claim, first, the improvement descri bed, which consists in giving an automatic motion to the upper slide or tool rest, when set at any an gle to the bed-piece of the lathe, instead of moving it by hand, so as to turn with ease and accuracy, so lid or hollow cones, as set forth, by means, substan tially, of the screw, revolving worm shaft, and re volving plate, as set forth. EXPBBSSINO SUGAR CANE Jr ios— By Henry Bes semer, of Baxter House, England. Patented in England, Feb.24, 1852: 1 claim the improvement of constructing each of the cane-ptessiog tubes, sub stantially as specified, viz., with sides made parallel some distance (for the working of the piston against), and to approach one another towards the mouth of discharge of the pressed cane, whereby advantages asmontioned are gained. Also the combination and arrangement of the com presses, or pressing tubes, and two conjoined pis tons, with one revolving, actuating shaft, and its mechanism, to give to their plungers or pistons a simultaneous reciprocating rectilinear motion, all as mentioned. HEATERS FOR SUGAR SYRUP—By Henry Besse mer, of Baxter House. England. Patented in Eng., Feb. 21, 1852: I amaware that in locomotive engines water has been heated by standing in tubes exposed to the flame or direct heat of a furnace ; now such a mode of heating will not answer for the treatment of the saccharine syrup, as the heat of a furnace is not susceptible of regulation, as is that from steam, the latter not burning the syrup, or injuriously heating it, as would the former. I have discovered that the heat of Bteam applied to syrups, as described, in connection with the ac tion of gravity, produces advantages, in rapidly heating the syrup, unattainable by any process, when the ayrup is passed through pipes heated by direct heat, or the flame of a furnace. It is, therefore, that I expressly disclaim the mode of heating water, by allo ing it to flow through a stand or tube, heated by the direct heat of a fur nace, but base my invention of the method descri bed of treating saccharine syrup, by means of the apparatus represented, as arranged and constructed to operate, for the purpose set forth, by the power of gravity and steam, the same consisting of a com bination of the receiving vessel, series of tubes, a chamber and pipe, and the steam chamber, having; induction and eduction pipes, as specified. TOPPING-LIFT AND PEAK HALYARD BLOCK OF SAIL VESSELS— ;By Wo. & S. G.Coleman, ef Pro vidence, R. I : We claim supporting the topping-lift, by means of a craae, of such torm and con struction, that when the topping-lift saga, when the sail is hoisted, it shall not foul or chafe against the peak halyard block. Also, so arranging and constructing such crane, that it may also support the peak halyard block, as specified. ROOKING CHAIRS- By Peter Ten Eyck, of New York City : I claim in combination with a sitting chair, so arranged that the seat may rock upon the legs, or support the safety piece or guard, hung ec centrically to the pivot of the bar on which it rests, and the spring for preventing the top part of the chair from rocking too far or too suddenly, as de scribed KNITTING MACHINES—By Moses Marshall (assign or to W. Aldrich & L. B. Tyng), of Lowell, Mass. : I claim, first, connectiag the rotary depressers and the feeder, which carries the thread, with the arm which connects the reciprocating cam bores; as de scribed. Second, dividing the plates which support the needles and cast the stitches at the angle of inter section of the tw sets of needles, so that the fabric knit, will or may pass between them Third, forming the stitches alternately on each ide of the needle rests, by two sets of needles pla ced at an angle to each other, and operating one needle ata time, as set forth. RE ISSUE. SELF-ACTING MULES FOR SPINNIGG—By Wanton Rouse, of Tauuton, Mass Patented originally Nov. 2,1852: I claim, first, governing the revolution of the spindles in winding the yarn on the cop, also in backing off during the progressive stages of the building, by means of a cam or any equivalent de vice, of irregular form, circumferen'ially with the said irregularity, varying from end to end, the said cam or equivalent being caused to operate upon the mechanism which drives the spindles, in anyway that will produce the results set forth. Second, the mechanism for causing the finger through which the irregular surface of the cam or its equivalent, acts upon the mechanism which d fives the spindles, in backing off and building on, to traverse the said cam, and to be kept close to its surface, consisting of the screws, nut, cord or chain, lever, and stud, operating in combination, as set forth.