the periphery of a rotary cam s, fixed on the main shaft h; hence, as this cam s, revolves, such vibratory movements will be given to the bar B, through the compound levers P, O, N, L, K, I, as will cause the thread-carriers ▲, to perform the required evolutions.

Having now described the construction of my improved machinery, I proceed to show the effect of its operations in connexion with the ordinary parts and movements of a warp frame.

The machine being supposed to be furnished with its complement of threads conducted from the beams d, d, d, d, d, through the guides c, c, c, to the needles a, as is usually done, and all parts being in working order, I will consider the mechanism as standing in the position shown at fig. 3, that is, as it would be technically expressed," at the end of a course." Now, in putting the machine in action, the bar f, will first move, advancing the sinkers e, for the purpose of bringing forward the work, that is, the loops which have been formed and passed over the beards of the needles by the preceding operation of the machinery; the sinkers will then descend, and cause their hooked nibs to take hold of the guide threads. The thread-carriers A, will, during the advance of the sinkers, rise, and their longer points enter between the threads extending from the guides to the needles; which position of the parts is represented in the partial sectional figure 5; and when this has taken place, the guides are to be shogged, that is, moved laterally by the ordinary means, for the purpose of drawing the threads aside into oblique positions. The threadcarriers still rising, their shorter points now enter between the threads; but owing to the oblique positions which the threads have assumed since the shogging of the guides, the shorter points of the thread-carriers will

not pass between the same threads as their respective longer points did; consequently, the threads, when lifted by the carriers over the needles, will be found to extend diagonally across the needles.

The sinkers now recede, carrying back the wor previously made, and with it the threads under the needles; and at the same time the thread-carriers rise to their greatest height, lifting the threads over the heads of the needles, as shown in the partial section at fig. 6. The thread-carriers then recede for the purpose of pushing the threads back beyond the beards of the needles; and in order to afford the quantity of thread required for forming the loops, the parts called the machine, with the guides c, c, has been made to approach toward the needles. These last described positions of the parts are shown in the partial section, fig. 7.

The movements of the mechanism, as described in reference to fig. 3, will now cause the thread-carriers A, to descend, and in so doing, they will force the threads under the beards of the needles, and then pass down, perfectly free from the threads, into the position shown in fig. 3. During the time that this last movement of the thread-carriers is proceeding, the sinkers e, advance a little distance and then rise, for the purpose of bringing the work forward upon the shafts of the needles; the presser bar g, then descends on to the beards of the needles, and the operations of forming the stitches or loops of the fabric goes on in the ordinary way.

This is the end of a course; and the progress of the next course, with the movements of the improved parts of the mechanism, is carried on in the way described above.-[Inrolled in the Rolls Chapel Office, February, 1837.]

Specification drawn by Messrs. Newton and Berry.

To JAMES HUDSON, of Gale, near Rochdale, in the county of Lancaster, calico-printer, for his invention of certain machinery or apparatus applicable in block printing on silk, woollen, cotton, and other fabrics, and on paper. [Sealed 4th December, 1834.]

THIS is a contrivance for furnishing a continual and regular supply of colour to the sieve or tear into which the printer has to dip his block, for the purpose of re ceiving the colour about to be transferred to the fabric in the operation of printing silks, calico, or other fabric, or paper hangings.

The ordinary colouring tear is a sieve having a tight but flexible waterproof diaphragm, which is floated upon the surface of a vessel of water, in order that it may afford an elastic resistance. Upon the upper sur face of this diaphragm the colour is spread evenly, and the printer, before giving an impression, presses the face of his block upon it, for the purpose of taking up so much colour upon the face of the block, as shall be sufficient to give the print of the pattern upon the fabric. By repeatedly dipping or pressing the block on the diaphragm the thin coat of colour, of course, soon becomes exhausted; and it is the business of another person to furnish the sieve or tear with a fresh supply of colour from time to time, and to spread the colour evenly over the surface of the diaphragm.

The object of the present invention is to afford a continued and uniform supply of colour to the tear, without the assistance of an attendant; and this is done by a travelling endless web, moved by mechanism, which, by passing progressively from the colour vat over the diaphragm, brings forward a constant and equal supply of colour for the printer to dip his block into.

Plate X., fig. 5, represents the construction of this improved apparatus, shown partly in section: a, a, is a vessel of iron, supported upon wooden standards b,b, over the upper surface of which vessel a sheet or diaphragm c, c, of oiled cloth, or other suitable elastic material, is distended and made fast at its edges, by being bent over a flange, and packed or cemented to render the joints water-tight. A vertical pipe d, is intended to conduct water to the interior of the vessel a, and by a small elevation of the column, to create such upward pressure as shall give to the diaphragm a slight protuberance.

An endless web e, e, e, passing over the surface of the diaphragm, is distended over three rollers f, g, h, the lower of which f, is in contact with the colour roller i, in the colour trough k. On the axle of the roller i, a pulley wheel l, is fixed, which allows the roller to be turned by a band from any first mover; or the roller may receive rotary motion by a winch fixed on its axle. On this said axle there is also a toothed wheel taking into another toothed wheel on the axle of the roller ƒ; hence the rotation of the colour roller i, in the direction of the arrow, will cause the roller f, to revolve in an opposite direction, and to carry forward the endless web e, e, e, over the elastic diaphragm, the web taking with it a stratum of colour received from the roller i, evenly distributed over its surface, and ready for the printer to dip his block into.

The axles of the rollers f, and g, turn in stationary bearings, but the axle of h, is mounted in sliding nuts, which may be moved by turning the screws m, for the purpose of tightening the endless web. The axle of the colour roller i, turns in mortices, and may be raised by screws n, in order to bring its surface into contact with

the endless web. To prevent too great a quantity of colour being taken up, the endless web passes through a long slit or parallel aperture in a frame o, which acts as a scraper or doctor, and is adjustable by a screw p, to regulate the quantity of colour carried up. The contents of the vessel a, and of the ink trough k, may be discharged when required, by a cock in the bottom of each.

The Patentee concludes by saying, that he does not confine himself to the size and proportions of the parts, nor to any particular materials of which they may be made, nor to the precise arrangement of the machinery; but that which he claims as his invention is," the contrivance of presenting for the purpose set forth, a renewed and uniform layer of colouring material or mor. dant, by means of an extended web of appropriate fabric moving upon or over an elastic suitable supporting surface, and carrying such self-regulating supply of colouring matter or mordant, by whatever modification of machinery."-[Inrolled in the Inrolment Office, June, 1835.]

To ALEXANDER DIXON and JAMES DIXON, of Clackheaton, near Leeds, in the county of York, manufacturing chemists, for their invention of improvements in dyeing, by the application of materials not hitherto so used.— [Sealed 29th April, 1837.]

THIS invention is comprised in a small compass. The Patentees say, according to the ordinary processes of dyeing browns, greens, olives, Saxon blues, and blacks, a substance called "argal" (crude tartar) is employed as a mordant, as is well understood by dyers, which is an expensive material. Now, the object of this inven