342 MEMOIR OF DANIEL TREAD WELL. 



fixed to it by wings that the verge and clutch must revolve together. Each of the 

 cog-wheels has two pins diametrically opposite each other, the upper pins point- 

 ing downward, and the lower pins upward ; the clutch has corresponding slots to 

 receive these pins. The clutch also has around it a groove which receives the 

 forked end of a lever, s, turning on a pin, i } as a fulcrum. The opposite end of the 

 lever fits into a groove in a horizontal wheel, t, Fig. 4, 18 inches in diameter and 

 4.} inches thick, fixed on the main shaft, c. (Fig. 5 shows a different arrangement of 

 the groove on the wheel g.) The groove on the periphery of the wheel is cut in 

 a waving direction, so that during one part of the revolution the end of the lever 



in its groove shall be depressed, at another raised, and at still another stationary ; 

 the other end of the lever moving the chuck in the opposite directions. Upon 

 the upper and lower portions of the verge are fastened two cylinders of wood, j), p, 

 Figs. 5 and 7, to wind up two straps; one, u, fastened by one of its ends to the 

 lower cylinder, and by the other, after passing around the pulley, v, to one end of 

 the carriage; the other strap, u r , fastened to the upper cylinder, runs more directly 

 to the opposite end of the carriage to which it is fixed. By this contrivance, when 

 the end of the lever, by means of the grooved wheel, is moved up, remains station- 

 ary, or is moved downward, the clutch locks with the corresponding cog-wheel, 

 and winds up the strap, drawing the form of types under the platen, where it 

 remains stationary long enough to get the impression, and is then drawn by the 

 other strap from beneath the platen, to repeat the operation. 



The paper is carried to its place for printing by the following apparatus. On 

 each side of the bed, y, is a narrow bar of iron or slide about five feet long ; pieces 

 of iron with oblong holes are fixed to each side of the bed through which the slides 

 can move back and forth 2i feet in each direction. To the ends of the slides are 

 fixed upright pieces of iron, rising an inch or more above the bed ; in each piece of 

 iron is a half-inch hole. A frame or frisket of iron is made of the usual size; on 

 each side of this, at one end, are two projecting gudgeons, which fit into the holes in 

 the sides so that the frisket can move back and forth with the slides, and also up 

 and down on its gudgeons as a hinge. At each of the two corners of the frisket 

 farthest from the gudgeon are run out from the sides two pieces of iron, each three 

 inches long, called lifting-studs. Attached to the frame of the press, a little above the 

 level of the bed, and rising upward at an angle of 18°, is a sheet of iron, </, which 

 has firm raised edges of iron, one on either side. To one end of each of the frisket 

 slides is fastened- a cord, a', which runs over pulleys on the arm V, and has at its 

 other end a weight, c, which pulls the frisket slides up against the bed, and forces the 



