of the seam, by carrying a thread through the cloth by means of a curved needle on the end of a vibrating arm, and the passing of a shuttle furnished with its bobbin, in the manner set forth, between the needle and the thread which it carries, under a combination and arrangement of parts substantially the same with that described. I also claim the lifting of the thread that passes through the needle eye by means of the lifting rod W, for the purpose of forming a loop of loose thread that is to be subsequently drawn in by the passage of the shuttle, as herein fully described; said iifting rod being furnished with a lifting pin u, and governed in its motions by the guide pieces and other devices, arranged and operating substantially as described. I claim the holding of the thread that is given out by the shuttle so as to prevent its unwinding from the shuttle bobbin after the shuttle has passed through the loop, said thread being held by means of the lever or clipping piece q', as herein made known, or in any other manner that is substantially the same in its operation and result. I claim the manner of arranging and combining the small lever m'on' with the sliding box M, in combination with the spring piece z, for, the purpose of tightening the stitch as the needle is retracted, as described. I claim the holding of the cloth to be sewn by the use of a baster plate, furnished with points for that purpose, and with holes, enabling it to operate as a rack in the manner set forth, thereby carrying the cloth forward, and dispensing altogether with the necessity of basting the parts together.

ELIAS HoWE, Jr. No. 4751.

I claim, in combination with the adjustable mould board, adjusting the depth of the forward part of the machine, substantially as described: SAMUEL THRAELKILL.

Having thus fully described my improved apparatus, what I claim therein as new, and desire to secure by letters patent, is the combination of the pipes (c & E) the box (i) and pipe (n) constructed substantially in the manner and for the purpose herein fully set forth, so as to cause a suffi. cient draught, and at the same time to arrest the sparks. AUGUSTUS HAMANN.

No. 4753. -

Having thus fully set forth the nature of our new manufacture of artificial burr millstones, and shown the manner in which we effect the same, what we claim therein as new, and desire to secure by letters patent, is the preparing of such artificial burr stones, by incorporating with clay, or such earth as is fitted for making the harder kinds of pottery, a large portion of fragmentary vegetables, or such other suitable matter as will cause the said clays, when burnt, to be filled with pores of the kind by which it is adapted to take the place of the natural burr stone ; the whole procedure and operation being substantially the same with that herein fully

made known. EZEKIEL CUTTER. STEPHEN BLANCHARD.

No. 4754.

What I claim as my invention, and desire to secure by letters patent, is the mode by which I obtain a vacuum in meat vat A, for curing meat, by exhausting the brine from meat vat A into brine vat B, and by means of the combination of stop-cock P and pipe K, connecting vat A with vat B, and stop-cock L, in pipe N, I, substantially as above described. AUGUSTUS C. ALLEN.

No. 4755,

Now what I claim as my invention, and wish to secure by letters patent, is the use of French burr stones, or of a similar material, not in blocks, but in small pieces, heretofore considered useless, o these pieces in an external frame of the shape of a cone or cylinder, so as to form a grinding surface that will cost far less than a similar surface formed in any other way hitherto employed. • JESSE FITZGERALD. i * -

I do not claim the invention of printing by machinery or those necessary parts common to printing machines, taken in connexion with the parts substituted by me for others necessary to make one machine; but what I do claim as my invention, and desire to secure by letters patent, is the use of a vibrating cylinder or cylindrical segment having two sets of grippers, constructed as described ; also, the application of revolving cylindric brushes in the manner described ; and, finally, the use of adjustable weights in connexion with the vibrating cylinder or segment; the whole being constructed, combined, and operating substantially in the

manner set forth. WM. W. MARSTON. No. 4757.

What I claim as my invention, and desire to secure by letters patent, is combining the scale beam with the platform balance, in the manner described, so as to be turned into any horizontal position, the whole being constructed as herein set forth. JOSHUA GIBBS.

No. 4758.

What I claim as my invention, and desire to secure by letters patent, is constructing the inside cylinder with a combination of cards and hairbrushes; also, in combination with the above, the flat screen P, (figure 1.) the double separator r, the spring beater, (figure 8,) and the manner in

which the outside cylinder revolves on the cylindrical journals d, d, (figures 6 and 7,) without coming in contact with the shaft a ; all as herein set forth, for the purpose herein described. EDWARD BRADF1ELD.

No. 4759.

Having thus fully described the manner in which I construct and employ my portable coffer dam, what I claim therein as new, and desire to secure by letters patent, is the manner in which I have arranged and com: bined the respective parts thereof, so as to adapt it to the purpose intended as herein made known; that is to say, I claim in combination the providing of the inner box or coffer with doors at its lower part, which, when closed, will convert it into a buoyant vessel, said coffer being provided with elastic padding on its lower edge, and troughs or boxes capable of receiving such load of stone or other materials as will sink, and press the coffer down upon the bottom of the stream or other water, as herein fully made known, and the expedient of letting in the water to fill the said boxes to increase the pressure, and the pumping out of said water to

render it more buoyant. SAMUEL S. WALLEY.

No. 4760. - f

What I claim as my invention, and desire to secure by letters patent, is the introduction of a blacksmith’s furnace in such a manner as to allow the cinders and ashes to freely escape, and prevent their clogging the fire chambers, by placing grate bars f, f, at its base, opening into an open air chamber D, (leading out at the side of the forge,) and the admitting the blast through the sides of the fire chamber above the top of the grate bars, substantially as herein set forth. - J. R. HOBBS.

No. 4761.

My improvement, and therefore that which I claim, consists in the auxiliary scale (F,) and weight (H,) as combined and operating with the main weight (C) substantially in the manner and for the purpose as above specified. In testimony whereof, I have hereto set my signature this eleventh day of April, A. D. 1846. THADIOFUS FAIRBANKS.

No. 4762.

What I claim as my invention, and desire to secure by letters patent, is the manner of combining the hooks and eyes and clevis, as above described, by which the sides of the plough may be elevated and raised out of the ground, so as to conform to the inequalities and irregularities in the corn rows without disturbing the other parts of the machine, and without the necessity of raising the entire plough. ISAAC EDWARDS.

No. 4763.

I do not claim the employment (in a hive) of drawers and boxes, and cases to receive them, as I am well aware that such are old and common devices; but that which I do claim is my improved manner of arranging each box and its case in the main chamber of the hive, as above described ; that is to say, the so disposing them therein that two diagonal flanes, passing through their corners, shall be respectively parallel to the bottom and sides of the hive, substantially as herein above specified.

in testimony whereof, I have hereto set my signature this eleventh day

of April, A. D. 1846. WILLIAM WHITCOMB. No. 4764.

Having thus described my invention, I shall claim the lance head, the cylindrical barrel or bomb, and the priming tube, in combination with one another, and arranged and operating together substantially as above set forth.

In testimony whereof, I have hereto set my signature this second day

of June, A. D. 1846. OLIVER ALLEN. \ - No. 4765.

* - o

Having in the commencement of this specification set forth the general differences between these arrangements, and those that have preceded them, it will be understood that I do not claim to have originally invented an expansively acting steam engine; neither do I claim to have invented any of the parts herein described, as used by me for these purposes, the whole of them having been long well known and in general use; neither do I claim the application of two cylinders with a pair of cranks irrespective of an arrangement for the admission of the steam from the first cylinder into the second at the half stroke (more or less) of the first piston; but I do claim as new and of my own invention, and desire to secure by letters patent—

First. The mode of constructing and arranging two steam cylinders, side by side, with steam passages from one to the other direct, at each end, in combination with valves so arranged and operated as to admit the steam from the boiler into one cylinder only, and from that one into the same end of the other cylinder at the half-stroke (more or less) of the piston of the first cylinder, substantially as described and shown.

Second. I claim as new the mode of working the expansion and exhaust valves, contradistinguished from the working of all other valves, they each being opened by the toe of one rock-shaft, in advance of the regular or usual period; the one at the proper time to allow the steam to pass into the second cylinder, to act by expansion, and the other at the proper time to prevent the compression of steam, or reaction between the two pistons; from which toes the valves are each taken by a toe of an: other rock-shaft, for the purpose of being sustained and kept open the requisite length of time for the attainment of the ends sought, as described and shown. *

Third. I claim as new the arrangement for disconnecting the two cylinders, by simply opening the exhaust valves to the second cylinder, and unhooking the eccentric which works the expansion valves between the two cylinders, where the first cylinder is used, as a single engine, worked in the ordinary way or by hand, for the purpose of reversing the motion, or stopping or starting the engine, as described and shown. Fourth, and lastly. I claim the arrangement and application of the several parts with each other which I have above described and set out as new, in combination with a pair of cranks which are attached to one main or driving shaft, set to a right angle, or either more or less than a right angle with each other, for the purpose of working the pistons of the two cylinders in the same direction by the primary and expansive action of the steam, and exhausting to the air or a condenser forming a vacuum, each working by one channel from the same end of the two cylinders at the same time, substantially as described and shown. In testimony whereof, I have hereunto set my hand in the city of New York this day, the nineteenth of February, one thousand eight hundred and forty-six. DANIEL BARNUM.

No. 4766. From the foregoing description it will be seen that the motions of feeding and pressing are not only positive, (effected by the motion of the serpentine grooved wheel, levers, rods, &c.,) but completely alternate and independent of each other. During the operation of pressing, the feeding roller is stationary, and during the raising of the pressure the feed roller is in action. I do not intend to claim the principle of compressing the straw at the mouth of the cutting-box at the moment the knives pass through the straw, as I am aware that this has been done in various ways; for instance, by the treadle, by hand rake, and lastly by levers and cams ; but what I do claim as my invention, and desire to secure by letters patent, is— 1st. The combination and arrangement of levers R and T, rods Q and S, and reaching arm R, and serpentine grooved wheel w, as described, for raising the pressure and turning the feed roller simultaneously, and for bringing down the pressure at the moment the feed or reaching arm slides loosely over the teeth of the rag wheel. 2d. Constructing the feed roller F with curved teeth f, in the manner and for the purpose described, for raking forward the straw without causing it to become entangled upon the teeth or roller, as described. 3d. I also claim the combination of the shaft-edged triangular shaped plates or stops, S, with the steel plate at the mouth of the cutting box, constructed, arranged, and operating in the manner set forth. ISAAC MAYFIELD.

No. 4767.

What we claim as our invention, and desire to secure by letters patent, is the combination, arrangement, and application of the outside lever H and I, as before described, and their agreement with the inside levers in such manner that when force is applied to the hand poles of the inside levers, both powers will agree in forcing the piston of the pump in one and