As the table begins to advance, the platten (con- | and fastened so that as the platten begins to turn nected to it at the hinge-joint d) is moved also; but over the cord brings down the frisket on the tympan this movement raises the platten in the following and confines the sheet of paper. manner. The pressing lever g turns upon pivots in the heads of the pillars f, which pressing lever is connected to the platten by means of the hinge-joint above, e; so that as the platten by the advance of the table is pushed forward the lower end of the lever raises it, and, by swinging upon its two joints, is, when the table has arrived at the front of the standard, thrown into the position shown in the figure. The paper is at this time laid between the tympan and the frisket, when, by turning the winch forward (that is, in a contrary direction to the last described), the chain draws back the bar b, which causes the table to return to its situation, the platten at the same time being turned over by means of its connection with the table at the hinge-joints, and is thus brought down, the lever g hanging almost in a perpendicular direction. A contrivance is provided for lifting the sheet off the tympan after being printed, by the rising of the frisket. At the top of the frisket is placed a tongue, which is held fast by a spring behind falling into a notch. When the frisket is shut down, the point of the tongue slips into a small groove in a piece screwed on to the tympan, and passes about an inch under the sheet of paper, so that when the frisket is thrown up again the tongue pulls the sheet off from the tympan, and on the frisket striking against a pin fixed to a rest,the tongue will be again forced out. inking the types, supplying the paper, and printing Mr. Winch has a patent for a new mode of selfthe sheet at one operation. The apparatus consists of a frame holding two tables or forms of letter, two pressing rollers, four inking rollers, and four frames for guiding the sheets of paper to be printed. The motion of the rollers (which may be communicated by manual labour, or by other means) is to be reciprocal, like the motion of a horizontal mangle, and which, by one entire forward and backward traverse, is intended to print four sheets of paper. The bed or basis of the machinery is upon two inclined planes, meeting pyramidically in the middle, over which a roller or shaft revolves, turned by a winch connected with a first mover. roller, connected with the pressing rollers, one of Chains pass round this centre which is made to roll up one of the inclined planes by the chains attached to its axis coiling round the centre roller, whilst the other by its own gravity rolls down the other inclined plane by its connecting links uncoiling. As these pressing rollers traverse they cause the inking rollers to pass over the types, having been previously supplied with ink from the ductors, distributers, and spreading boards, much in the usual manner. are each twice inked by the traversing of the rollers; Thus the two tables or forms of type and as each pressing roller reaches the extremity of its action, both at the middle and ends of the frame, a catch and lever cause the sheet of paper to be The revolutions of the inking rollers are effected which draws off the sheet from its frame, and causes brought down in its frame to meet the pressing roller, by means of a wheel upon the axis of the feeding-it to lap itself round the periphery of the pressing roller, over which a band passes from another wheel roller, by which the sheet is carried forward on the upon the axle of the rounce. The ductor is sus-types and receives its impression. The further propended upon pivots with a small balance weight, and gress of the roller brings the paper up again, which a string leading to a treadle, by means of which is taken off by tapes, and is thence conveyed by hand the printer will be enabled to bring it down, and to the pile of sheets before printed. supply the feeding-roller with ink at pleasure. There are small iron arms extending above and beyond the table for the purpose of lifting the inking-rollers, by passing under their axles when the table is rolled forward; at this time the distributing roller supplies the ink to the two lower or inking-rollers, which are thus brought in contact with it. As the table returns, the inking-rollers pass over the types, communicating the supply of ink ready for giving the next impression. The effective pressure commences when the foot of the bar b acts against the periphery of the rounce, and is complete when the bar strikes upon the stop or wooden block k, at which time the extended extremity of the bar b, meeting the periphery of the rounce, has caused the bar to drive the table home, which, by means of its connecting-piece, brings the platten down to meet it, and the lever g, thus approaching nearer to the perpendicular, exerts all the resistance that its pivots and the pillar heads, f, are able to bear, and communicates that force through the joint e to the platten, by which the effective pinch is given to produce the impression of the types on the paper. The inking apparatus attached to this printing-press is intended to be secured by screws and bolts upon two brackets on the opposite side of the frame. The conductor, as it is generally employed, deposits the ink upon a feeding roller, and that upon a distributing roller or surface. The principal improvements upon this inking apparatus consist in a novel contrivance for the purpose of giving an alternating lateral motion to the distributing roller, in order to spread the ink equally on the two inking rollers. plates are either fastened to blocks, matrix-plates, The raising and lowering of the frisket is effected by the following means. A convolute spring, simi-operations, Mr. Ferguson has a patent for the cmlar to a watch-spring, is coiled round the axis or joint of the frisket and tympan, and by its power the frisket is thrown open. There is affixed to the frisket an eccentric pulley, and another affixed to the joint connecting the platten and table; from these two eccentric fixed pulleys a cord is extended ployment of elastic substances under the stereotype plates, by which means the printed impressions from them are said by the patentee to be equalized, in whole or in part; for the elastic substances yield to the pressure upon the thicker parts of the plates, and at the same time afford the necessary resistance for |