The annexed engravings are a side elevation (figure 1) and the trumpet (figure 2) of an improved drawing regulator for spinning cotton, patented by Newell Wyllys, Jan. 1851, and assigned to Charles Collins, of Hartford, Conn. The object of this machine is to overcome the irregularities and defects in spinning cotton, occasioned by the want of uniformity in the extension or draw of the sliver, passing from the drawing frame. The arrangement of mechanism in connection with trie trumpet or condensing tube, is such that when the sliver is of the proper or required size, the lever on which the trumpet is mounted, occupies a neutral or mean position between the two extremes of its vibration, and the tendency to this neutral point increases in force in proportion to the distance it is moved therefrom. Any variation in the density or size of the sliver, varies the position of the lever to which the trumpet is attached, increasing or decreasing its effective length, and just in the same proportion increasing or decreasing the speed of the back or feeding rollers, thereby increasing or di- minishing the extension or draw of the sliver to a uniform size or density. DESCRIPTION.—A is the roller beam of the drawing frame; Bis the foot beam or girt; C is the calender roll board ; G are the top rollers ? are the bottom or fluted rollers ; I are the calender rollers; ? is the bevel gear on the end of front roller, ?; Q is the bevel gear on the end ot upright shaft, i, and is driven by gear, ? ; i is an upright shaft connecting the front roller, H, with the lower cone; k are the bevel gears on shafts, i and g driving the cones, b; j is an upright shaft connecting the upper cone with the back roller; I are bevel gears on shafts, j, and upper cone shaft, g, driven by the cones, h m is the j pinion on the end of lower cone shaft, g, which drives the spur gear, ?; y is the vibrating beam, turning on a shalt, and driven by the spur gear, ny to which it is connected near the circumference. On the upper end of the vibrating beam ave catches operating the ratchet wheel, s ; s is a ratchet wheel, on a shaft between the escapement, t, and the vibrating beam, y ; t is an escapement, connected by rod , to the end of lever, v, on the ho- rizontal shaft, Z, and by levers, X and U, to the trumpet shaft, T. The moving of the trumpet, M, either way, by turning the shaft, T, gives a corresponding motion to the escapement, so that the catches on the vibrating beam take effect on the ratchet wheel. At the other end of the shaft to which the ratchet wheel is attached, is a spur gear, p, which drives the pinions, ? and r, turning the screw shaft, e. The revolution of the screw shalt moves the belt guides right and left, and through the bevel gears, I, regulates the speed of the back rollers; ? is the trumpet, which revolves on a perpendicular pin, 2, attached to the end of a lever, E, the other end ol which is attached to an upright shaft, T, that turns in a tube or stand, N, as represented in figure 2. Whatever may be the situation of the lever, E, the mouth of the trumpet is always presented to the drawing, and turns out and in, either way from an angle of about fortj-five degrees with the line ot the calender rollers, according to the size of the sliver or friction of the drawing compressed in the trumpet. Whenever the trumpet is moved toward the calender ? oilers, ?,-by an increaa. ?ed quantity of drawing in compression, the effective length of the lever, E, is shortened correspondingly, and lengthened in the same proportion when the motion, owing to a decreased quantity of drawing, is towards the drawing rollers ? and G. This arrangement obviates the continual vibration of the trumpet each way from the central point, and prevents those defects and irregularities in the drawing, or sliver, which will occur where use is made of the direct action of the lever. These machines can be seen in operation in the mills of Hon. Charles Jackson, Rhode Island, ad Scituate and Fiskeville, also at Crompton Mills. We have seen a letter from Mr. Jackson, speaking in the highest terms of its merits. Mr. Collins has assignments from those who have patents for other drawing regulators, so as to prevent trouble about conflicting rights. One ot these machines will be in operation in the Crystal Palace, in this city when it opens, where its action can be seen and judged of, and more information can be obtained by letter addressed to Mr. Collins, at Hartford, Conn.