Patent GB-121281-A (GB)
Title: Improvements in and relating to Slowing Mechanism for Roving Rollers of Spinning Mules.
Inventor: DUNHAM ABRAHAM LINCOLN
IPC: D01H3/14
Filed: 1918-11-26
Abstract: 121,281. Dunham, A. L. Dec. 3, 1917, [Convention date]. Mules.-In a mule in which the delivery rollers are stopped before the end of the outward run, reversible means are provided which reduce the speed of the rollers before they stop. The front roller shaft 95, Fig. 1, is driven through a pair of scrolls C, D, Fig. 6, connected by a chain N. The driving-scroll C is driven through gearing S, X, A, 31 from a, gear y on the draft scroll shaft. The driven scroll D is connected to the shaft 95 through gearing 17, 18, shaft B, and bevel-gearing 19, 98. The gear 98 is on a sleeve 130 on the shaft 95 and can be clutched thereto by a clutch F. The driving-scroll C is clutched to the gear 31 through a clutch K, and is formed with a conical portion 22 leading to a small shank 21. The driven scroll D is formed with a large head 10 and conical part 12, so that as the chain N winds on the scroll C, the scroll D, after running for a time at a speed equal to that of the scroll C, gradually slows down. The carriage 74 carries a roller 100 which engages with a lever 101 to close the clutch F and cause the rollers 90, 91, 92 to revolve until a pin 105 on a driven wheel 103 releases a trigger device at a predetermined time and stops their revolution. The clutch K on the driving-roll shaft is operated by a lever L, the lower end of which engages a slide 50, Fig. 4. The spring 43 tends to hold the clutch parts in engagement. The slide 50 is spring-controlled and has a cut-away portion, so that when a lever H operated by a roller 73 on the carriage draws the slide along against the action of the spring 51, the lever L can move across the slide and put the clutch K in operation. A lock-lever acting by gravity holds the slide 50 and the clutch parts in engagement. This lever is released at a predetermined time by a pin 62 on a worm-wheel continuously driven from the gear 31. The lever T being tilted by the pin 62, the part 66 is removed from the end of the slide 50, and the slide is drawn back by the spring 51, pushing aside the lever L and opening the clutch K. The carriage, as it reaches the head at the end of the run in, puts the clutches F, K in operation, and the pins 105, 62 are arranged so that the clutch F is opened before the clutch K. The scrolls C, D ensure that the speed of the rollers is reduced before the clutches are opened. The scrolls C. D are returned to their original positions by a chain 80 and weight W as soon as the clutch K is disengaged. The weight W may be arranged as a dash-pot, and an extra weight may be provided, which is lifted off by the top of the casing of the dash-pot. A chain 86, with a pendant weight adapted to engage a stop on the frame, limits the return movement of the parts and, by governing the amount of chain N wound on the scroll D, adjusts the time the rollers run at normal speed before beginning to slow down. The mule may have a double roving- motion as shown in Fig. 1, embodying two clutches F, F<2> one for each side of the mule, in which cases both clutches, which need not be set to operate simultaneously, must be disengaged before the clutch K is opened. In a single roving- motion, a ratchet device may be substituted for the clutch on the shaft 95, and a chain drive for the cross-shaft B. The chain N is secured to the scrolls C, D by hooks, which will be disconnected if the clutch K sticks and the rolls turn too far. The scrolls C. D and the chain N are long enough to allow the point of slowing down to be fixed at the outward limit of the travel.