1 sably requisite as in the process or operation heretofore pursued. I also apply, as a substitute for thread made of hemp, flax, or other yarns, in the fabrication of braces, traces, or any other articles, to which the same can be usefully applied, and in lieu of stitching or sewing, wires made of iron, brass, or copper, or wires made of any other fit metal. These wires I use lengthways, by stretching them the whole length of the trace or brace ; and they are fastened at each end round small metal cylinders, inclosed between plates of leather, connected by means of the first-mentioned substitute, and in manner aforesaid. In witness whereof, &c. Specification of the Patent granted to JOHN KENT, of the Town and County of the Town of Southampton, Architect; for a new and expeditious Method of moving all Kinds of Goods or Materials to high Buildings or from deep Pluces. Dated March 12, 1810. : With a Plate. To all to whom these presents shall come, &c. Now KNOW YE, that in compliance with the said proviso, I, the said John Kent, do hereby declare that my said invention is described in manner following; that is to say My said invention is an improvement on the principle of a lever on a moving fulcrum, whereby power is gained without loss of time, as more fully appears by reference to the drawings annexed, see Plate IV. The drawings, Figs. 1 and 2, represent a body or weight to be raised, which is supposed to weigh four hundred weight, and to be suspended by a rope or chain passing passing over the pully B, and fastened at one end to the weight A, and at the other end to the centre of the wheel C, which wheel C is supposed in itself, or by weight attached to it, to be heavier than the weight A, which is to be raised. Now it is evident, that if a power be applied to the top of the wheel C, of two hundred weight, as at D, or a similar weight, to act as a power, as at E, that it will balance the weight A of four hundred pounds, because the power is applied at double the distance that the weight to be raised is from the moving fulcrum which is at the bottom of the wheel C; and if the wheel C be rolled along on an horizontal plane, as the line F represents, the weight A must necessarily be raised as much as the wheel C moves in the surface of the horizontal line or plane which supports it. The drawings, Figs. 3 and 4, explain my said invention in a compound manner, viz. A, the weight to be raised, of four hundred weight; B, the pulley over which the rope or chain passes from the said weight to the centre of the wheel C; D, another wheel, joined at its moveable centre to the moveable centre of the wheel C by an iron plate, or otherwise, on each side of the sustaining or friction wheels C and D; E, a roller of sufficient weight to roll on the two sustaining or friction wheels C and D. Now it is also evident, that if a power be applied to the centre of the roller E, as at F, of something more than two hundred weight, it will move the said roller round its axis towards the wheel C, by its rolling off the said sustaining wheel D on the said sustaining wheel C, and will thereby move the said sustaining wheel towards the power F, and will lift up the weight A; and if the power at F were joined with iron or any other proper material, from the centre of the roller E to the centre of the other similar sustaining wheels, as from E to K, or in an horizontal direction to the iron or other metal plates that are shewn by the yellow shade, of a semicircular form, or by any other means, from E to G, and also from H to I, as in number four, it would continue to increase the power one half by every pair of such sustaining or friction wheels and roller that may thus be added, viz. the first pair of sustaining or friction wheels and roller, marked 3, will balance four hundred weight by a power of two hundred weight; and the second pair of sustaining or friction wheels and roller, marked 4, will balance two hundred weight by a power of one hundred weight; and a third pair of sustaining wheels and rollers, if added, would balance one hundred weight by a power of half a hundred weight; and so on all which is effected by rolling the sustaining wheels and rollers on the horizontal plane, by means of joining the sustaining wheels together from the centre of each roller to the centre of each pair of the sustaining or friction wheels, or to the iron plates, or otherwise, in an horizontal direction which hold the sustaining wheels together; so that, by adding a continuation of sustaining or friction wheels and rollers, any power may be gained without loss of time, provided that the said rollers, which are laid on the said sustaining or friction wheels, are of a sufficient weight in themselves, or by weight attached to them, either by being suspended to the axis of the said rollers, or bearing on their axis, or any other way, as occasion may require; and to which sustaining wheels and rollers fly-wheels may be added if required. The rollers, in some cases, must be of a cylindrical, and at other times of a conical or any other convenient form, and are also made to 'roll either on an horizontal plane, or |