Fig. 516 represents a side elevation of the mule headstock, with a transverse section of the carriage, shown as running in, and in the act of winding. The drawing-rollers and roller beam are also seen in section. In Fig. 547 is seen a corresponding plan of the mule, showing the headstock in the middle, and having spindles working on each side. Fig. 548 is a front view.
The driving power is communicated to the machine through the horizontal first-motion shaft, on which are tbe fast and loose strap pulleys A B. When the carriage M has run in to the roller beam, or drawing-rollers, the front of which series is seen at cs, the driving strap is on the fast-pulley A, though a portion extends to the loose-pulley B. Motion is communicated to the drawing-rollers by the small change bevel-wheel C, driving the large bevel-wheel 0', running loose on the horizontal shaft c, and connected with the front line of drawing-rollers. The spindles are also driven from the chief motor shaft by the double-grooved cord-pulley, or rim, A2, on the extremity of the shaft, carrying the bevel-wheel C. From this pulley, an endless cord a passes downwards, bene,ath the guide-pulley a', thence to the oblique cord-pulley a2, as seen in the carriage M, and to and around the tin roller a2, keyed on the horizontal shaft J, which carries the tin cylinders Ji used for driviug the spindles. Thence it passes forward, and around the carrier-pulley a', fixed to the front of the frame, then along the floor to the guide-pulley a' at the back of the headstock, and thence to the rim-pulley A2. Whilst these movements for the spindles a,nd drawing-rollers are going on, the small spur-pinion C2, keyed on the front roller c, drives the spur-carrier-wheel ea, which drives the spur change-wheel c", fixed on the boss of the smaller spur-wheel c'; the last-named ca and c' run loose on studs, fixed to the movable weight-lever c6, hinged on the front roller-shaft c, the spur wheel c' gearing into the spur-wheel 0, which is keyed. on the shaft H, numing the full length of the mule, and upou which are fixed three scroll-pulleys, one being seen at c7, and one at each end of the shaft. These pulleys have a rope attache,d to and wound upon them, the other part being passed round the guide-pulleys, turned back, and attached to the carriage, for the purpose of traversing it outwarda as the yarn is spun. When the carriage arrives at the extent of its stretch, e. is at the point of its traverse the furthest from the front drawing-rollers, the faller-shaft comes into contact with the incline El, fixed on one end of the beam-lever E, pressing it down, so that it turns on its fixed centre E2. On the opposite end, is a similar incline 0, also a stud El, on whieh hangs the pendant cam-plate, the back of which bears against the fixed bracket. At the lower end. of this bar, is an oblong slot, through which the cam-shaft passes. This slot is of sufficient length to allow of the free vertical movement of the cam-plate. At each end of this slot, concentric with its centre, and projecting from the face of the cam-plate, are two circular inclines, one of which is seen at E6, commencing its rise, and terminating diametrically opposite, being half a revolution. One end of a steel pin abuts against the top of this incliue, and passing in a horizontal
direction through the catch-box D2, presses with its opposite end against the other half of the catch box, holding it out of gear until acted upon. This half of the catch-box slides freely upon a key, fixed ou the cam-shaft. A spiral spring E6, ono end of which presses agaiust its boss, and the other agaiost a etop-hoop, which is adjustable to regulate the tension of the spring 0, is fixed with a set screw to the shaft. This shaft next passes through the tubular cam-shaft D, to the hack of the headstock, where it has the wheel Da keyed upon it. When the end of the beam-lover E is pressed down, so that it turns on its fixed centre E2, moving its oppogte end upwards, it carries the pendant cam-plate, with its circular incline, away from tho steel pin ; the new position allows the steel spring E6 to 8,ct upon the catch-box, putting it into gear with the catch-box D2, which it carries round half a revolution, when the steel pin which is brought with it comes into contact with the second incline, puts it out of gear, aud causes all motion to cease. The tubular cam-shaft D rune in beariogs, one at ea,ch end, projected from the frame aide, and supports the last-mentioned shaft. The oatch-box D2 is keyed on one end, to give it motion. The cam 4, which acts on the lever 6, ia also fast. The lever 6, passing upwards, exteuds to the catch-box on the front roller c, and is carried by a stud in the frame, the centre of which is seen in the plan. The helical spring 7 is attached to this lever, and thereby holds the catch-box in gear. The partial revolution of the cam-shaft D is effected hy the revolving bevel-wheel b, fixed on the boss of the loose-pulley B, on the first-motion abaft, which gears into another wheel bl, keyed on the top of the upright shaft F, which passes down to the scroll-shaft. Another bevel-wheel on the same vertical shaft b' gears into the large backing-off bevel-wheel shown by dotted lines in the drawing, ca,st in one piece with the spur-wheel D', and which runs loose on the journal of the main driving-shaft, and gears into the spur-wheel Da, on the end of the cam-shaft giviug motion. When the carriage arrives at the boundary of its stretch, the first movement of the cam-shaft D, actuated in the manner explained, is to throw out of gear the catch-box on the front roller-shaft, thus stopping the motion of the drawiog-mllers and carriage. This is accomplished by the cams 4 and 5; the cam 4, coming round, presses against the projection on the lower end of the forked lever 6, working in the ring-groove in the projecting boss of the catch-box on the front roller-shaft. The cam 5 presses down one end of a beam-lever, the centre of which is seen at the opposite end, lifting the vertical bar, the top of which bears against the lower surface of the movable weight-lever 06, and dis connects the spur-wheel c* a,nd the wheel 0'6, thus stopping the carriage.