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fit into holes in plate a, which lessens the tendency to warp. The hearth extends around the ends of the fire chamber, and has ledges projecting out to sustain the oven doors when opened.

Claim. "What I claim as new, is the employment of three plates between the fire chamber and the oven; the foremost of these plates being divided into two parts a and d, these parts being connected together, and combined with the plates b and c, and with the body of the stove, as set forth. I claim also the manner of supporting the drop doors of the oven, by extending the lap, or hearth, back to them, as described."

18. For an improvement in Couplings for Carriages; George W. Hatch, Parkman, Geauga county, Ohio, June 13.

The patentee says, "The nature of my invention consists in providing the forward axle-tree of a wagon, or carriage, with a coupling which will allow the forward axle-tree an easy horizontal and vertical motion."

The horizontal wheel attached to the forward part of the carriage body rests on the axle-tree, which is provided with a curved plate, so that the axle-tree shall have room to vibrate vertically within a limited range, governed by the curvature given to the plate. At right angles to the curved plate, and attached to the axle-tree, there is another plate, the ends of which embrace the rim of the horizontal wheel to assist the king bolt in forming the connexion between the wheel and axle-tree. The head of the king bolt is round, and is received in a countersink in a cross-bar of the wheel.

Claim. "What I claim as my invention, is the combination of the circular plate with the curved lower plate, the former being embraced by the hooks projecting from the latter; and in combination with these, I also claim the globe head of the king bolt fitting in the concave of the cross-bar, for the purpose and in the manner described.”

19. For an improvement in the Cooking Stove; John C. Hermance, Schenectady, New York, June 13.

This is for an improvement in the mode of heating the space between the bottom plate of the upper, and the top plate of the lower, oven, such spaces having long since been used in cooking stoves, but not arranged as this is, with the view of carrying through it a current of heated air; this is effected by connecting the space between the ovens on one side, with a space between the top oven and the fire chamber, which receives air from the room, and in which it is highly heated, and on the other side with the diving flue at the back of the stove, which causes the current of heated air to pass through the space between the two ovens.

Claim. "What I claim as new, is the manner of arranging the heated air space between the upper and lower ovens, causing a current of highly heated air to pass through it by making perforations through the back oven plate in the manner set forth. I do not claim the use of a heated air chamber, or either of the other devices herein

named; but I limit my claim to the use of a heated air chamber, under the combination and arrangement thereof described."

20. For Self-Setting Head and Tail Blocks of Saw-Mill Carriages ; Joseph J. Parker, Plymouth, Washington county, Ohio, June 13. We are under the necessity of omitting the claims in this instance, because they refer to, and are wholly dependent upon, the drawings. The improvements consist of an arrangement of inclined planes and slides, by which the log is lifted, and the slides moved, so that the weight of the log shall effect the setting, the slides being moved whilst the log is lifted up. By this arrangement the log is lifted up vertically by the motion of the carriage, and its weight transferred on to the slides, instead of pushing the log with its whole weight laterally.

21. For an improvement in Door Locks; Linus Yale, Springfield, Hampden county, Mass., June 13.

We have here a rotating permutation lock; the key turns a plate, called a "tumbler" in the specification, which turns within a ring, and there are corresponding radial apertures in the tumbler and ring into which fit pins, or "pistons," that are caused to assume their proper positions, to admit of the turning of the tumbler, by the introduction of the key. On the lower face of this rotating tumbler there is a pin that works in a groove inꞌthe bolt, and at right angles with its length, to throw it in, or out.

Claim. "What I claim as my invention, is the method of throwing the bolt, by means of the pin, on the rotary tumbler working in a groove in the bolt, in combination with the arrangement of pistons in the rotary tumbler and circular rim, as described."

22. For an improvement in the Cotton Press; William Sewell, jr., Macon, Bibb county, Georgia, June 15.

This is for a modification of that kind of press in which pressure is made by means of two toggle-joints, arranged one on each side of, and under, the follower, the toggles being drawn together by means of cords, or chains, attached to the joints, and carried around a windlass, or windlasses, located between them. In the press under consideration, the upper arms are longer than the lower ones, and the windlass, or windlasses, are so located in height as to be considerably above the level of the joints when the follower is down, and on a level with them, or nearly so, when it is up; by which arrangement, "at the commencement of the operation the strain of the pressure is borne by the ropes, but as the arms are brought more nearly into a vertical position, the strain is gradually shifted, as the power of the arms increase, from the ropes to the arms."

Claim. "I am aware that double toggle-joint presses have been constructed with a windlass stationed in the centre, between the said joints, and that pulleys have been used to draw together toggle-joints,

in which the ropes extended straight across from the centre joint of one, to the centre joint of the other toggle-joints; and that they have also been made with arms of unequal length; therefore, I do not claim either of these general principles; but what I do claim as my invention, is the combination and arrangement of the toggle-joints, as herein described, with the purchase fixed between said joints, in the manner and for the purpose set forth, so that the lower arms are allowed to fall into a horizontal position, and are raised by a purchase placed at a stationary point, and between them."

23. For a mode of Tanning Leather by means of a Flagellator; Robert Downey, New Albany, Floyd county, Indiana, June 15. The patentee says, "The nature of my invention consists in flagellating, or whipping, the hides on the flesh side during and while in the first stages of being tanned. After ten, or fifteen, days, the hides may occasionally be flagellated on the grained side a little. Believing that one of the effects of the bark in the ordinary mode of tanning is to close the pores of the hide, and thus prevent that complete saturation with the bark liquor, which contains the tannin, and on which the perfection of the leather depends, in order to obviate this objection I propose the above named machine, which strikes about twentyfive hundred strokes a minute, and which raises and thickens the hide, and so opens the pores, that at the same time the gelatin and gluten are oozing out, the bark liquor is driven in with the machine, and the hide is made ready for the reception of another saturation, and may be placed either in the revolving, or stationary, handler, until again saturated, which may be known by the closing of the pores, and then the same operation is repeated."

The machine for this purpose, described in the patent, consists of a bed, or carriage, on which the hides are placed, and submitted to the action of a series of rods, or whips, working on a rod near one end, lifted by a series of tappets on a roller, and forced down by springs.

Claim. "What I claim as my invention, is the flagellating, or whipping, the hides by means of the beaters, as herein described, or any other mode substantially the same."

24. For improvements in the manner of preparing Fabrics of Caoutchouc, or India Rubber; Charles Goodyear, New York City, June 15.

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The patentee says, "My principal improvement consists in the combining of sulphur and white lead with india rubber, and in the submitting of the compound, thus formed, to the action of heat, at a regulated temperature; by which combination and exposure to heat it will be so far altered in its qualities as not to become softened by exposure to the solar rays, or of artificial heat, at a temperature below that to which it was submitted in its preparation, say to a heat of 270" of Fahrenheit's scale; nor will it be injuriously affected by exposure to cold; it will also resist the action of the expressed oils,

and that, likewise, of spirits of turpentine, and of the other essential oils, at common temperatures, which oils are its usual solvents."

The compound may be formed of various proportions of the ingredients, but that which is deemed best consists of twenty-five parts of india rubber, five of sulphur, and seven of white lead-the india rubber having been previously dissolved in some of the essential oils, and the sulphur and white lead ground in the manner of preparing paint. Claim. "I do hereby declare that I do not claim the combining of sulphur with caoutchouc either in the proportions named, or in any other, this combination having been the subject of a patent granted to me on the 24th day of February, 1839; but I do claim the combining of the said gum with sulphur, and with white lead, so as to form a triple compound, either in the proportions herein named, or in any other, within such limits as will produce a like result.

here remark, that although I have obtained the best result from the carbonate of lead, other salts of lead, or the oxides of that metal, may be substituted therefor, and will produce a good effect; I, therefore, under this head, claim the employment of either of the oxides, or salts of lead, in the place of the white lead, in the above named compound. I also claim the formation of a fabric of the india rubber by interposing layers of cotton batting between those of the gum, in the manner and for the purpose described. I likewise claim, in combination with the foregoing, the process of exposing the india rubber fabric to the action of a high degree of heat, such as is herein specified, by means of which my compound is effectually changed in its properties, so as to protect it from decomposition, or deterioration, by the action of those agents which have heretofore been found to produce that effect upon india rubber goods."

25. For an improvement in Horse Hames; Nathan Post, Madrid St. Lawrence county, New York, June 15.

There are two curved levers attached to the front of the hames, and connected together, under the horse's neck, by means of a chain and snap hook. The draught hooks are attached to the hames, and pass around the levers, which, being extended some distance forward of the hames, and connected together, prevent them from twisting, or bending, under the pull of the horse.

Claim. "What I claim is the combination of the hook and levers with the hames, substantially in the manner described."

26. For a method of Hardening and Coloring Wood, &c.; Charles F. Spicker, New York, June 24.

Claim. "What I claim as my invention, is the method of hardening and coloring wood by diffusing tannin, or tannic acid, together with vegetable colors, throughout the whole structure of the wood, and incorporating the same therewith, by the aid of caustic potassa, or soda, or other analogous substance, in the mode described, and in varying the color afterwards by the use of metallic salts, whose base has an affinity for tannin, or tannic acid, and also for the application

of the same process to manilla grass, and other articles used for cordage and ship rigging."

27. For improvements in Air-Heating Furnaces; Jephtha Bradley, St. Albans, Franklin county, Vermont, June 24.

The grates at the bottom of the fire chamber, on which the fuel rests, are tubular, and communicate at the back with a chamber at the back of the fire chamber, the upper part of which extends over this air chamber in the form of a flue communicating with a long, flat flue above the fire chamber, divided horizontally, by a partition, from the back to within a short distance of the front, leaving space for the draught to pass to the upper division, and from thence out at the pipe, or chimney. This double return flue is surrounded by an air chamber; and, in addition to these, there are other air chambers at the sides of the fire chamber, and the whole is surrounded by a double casing. The side and back air chambers, and, consequently, the whole of the grate bars communicate with the upper air chamber that surrounds the double return flues. In the claim the side air chambers are designated by the letter i, the back chamber by the letter d, the upper one by the letter k, and the double return flue, which it surrounds, by the letter f

Claim. "What I claim as my invention, is the combination of the air chambers i, i, and d, k, surrounding the fire, with the tube grate, the chamber k, having a double return flue f, therein, as described."

28. For an improvement in the Press; Amos Jackson, New Liberty, Adams county, Illinois, June 24.

The bed of this press is a long lever, nearly horizontal, one end of which is jointed to an inclined piece of timber, at an angle of about 45°; and the follower of the press is another lever above the first, and connected with it at one end by a sword jointed to the lower lever, or bed, and passed through a mortise in the end of the upper lever, or follower, where the two are connected by a pin, which fits into holes in the sword, in the usual manner of forming such adjustable connexions; the other end of this upper lever is mortised, and embraces the inclined piece of timber. The bottom lever, or bed, is lifted up by a windlass and cords, and when liberated makes pressure by its gravity, and that of the upper lever. The articles to be pressed are placed between these two levers, and when their linked ends descend, that end of the upper one, which embraces the inclined timber, is made to approach the lower one, in consequence of the inclination of the timber.

Claim. "What I claim as my invention, is the combination of the inclined plane with the levers, arranged and operated in the manner set forth, for the purpose specified."

29. For an improvement in Bee Hives; James A. Cutting, Haverhill, Grafton county, New Hampshire, June 24.

Within the bee house there are three drawers, two at the bottom,

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