Patent GB-555065-A (GB)
Title: Improvements in or relating to the drafting heads of textile machinery
IPC: D01H5/22
Filed: 1942-01-29
Abstract: 555,065. Drawing yarns &c ; sliver conductors. CLAPPERTON, G., and BARNES, R. Jan. 29, 1942, Nos. 1229, 10961, and 16072. [Classes 120 (i) and 120 (ii)] In the drawing head of a ring spinning frame or other textile machine, the front bottom roller drives the other bottom rollers through a series of gears arranged in a box over which the ends of the bottom roller shafts project and which contains a number of short shafts, one for each of the bottom roller shafts other than the front bottom roller shaft, the first short shaft being driven through gearing from the front bottom roller shaft and driving the second bottom roller shaft and the second short shaft which drives the third bottom roller shaft and third short shaft which drives the fourth bottom roller shaft and so on, the last short shaft driving the back bottom roller shaft. As shown in Figs. 3 & 4, the shaft a<SP>1</SP> of the front bottom roller A<SP>1</SP> is driven in synchronism with the spindle drive and drives the short shaft E<SP>2</SP> in the gear box E through a train of gears e and drives the shaft a<SP>2</SP> of the next bottom roller through the train of gears e<SP>1</SP> and the second short shaft E<SP>3</SP> through the gears e<SP>2</SP>. The shaft a<SP>3</SP> of the third bottom roller is driven from the shaft E<SP>3</SP> through the gears e<SP>3</SP> and the shaft E<SP>3</SP> also drives the short shaft E<SP>4</SP> through the gears e<SP>4</SP> and so on, the last and back bottom roller shaft a<SP>6</SP> being driven from the short shaft E<SP>6</SP> through the gears e<SP>9</SP>. The shafts E<SP>2</SP> ... E<SP>6</SP> are carried in bearings near the bottom of the gear box and each train of gears e<SP>1</SP> .... e<SP>9</SP> driving the bottom roller shafts a<SP>2</SP> ... a<SP>6</SP> consists of three gears, a gear 1 on the corresponding short shaft e.g. E<SP>6</SP>, an intermediate gear 2, and a gear 3 on the corresponding bottom roller shaft, the gear 2 being carried by the pivot f of a double link F one arm f<SP>1</SP> of which is also journalled on the short shaft and the other arm f on the bottom roller shaft ; by this means the bottom roller shafts may be adjusted relatively to the shafts E<SP>2</SP> ... E' when varying the distances between the drawing rollers. Each of the train of gears connecting the short shafts comprises an intermediate gear journaled on a bearing having an arcuate slot struck from the axes of the driving gear so that the wheel on the driven shaft may be changed to vary the relative speeds of the rollers and one or more of the wheels in the gear train e may be changed to vary the speed rates between the bottom front roller shaft a<SP>1</SP> and the first short shaft E<SP>2</SP>: backlash between the gears is prevented by a pawl and ratchet arrangement G on the shaft E<SP>2</SP>. The fibres may be consolidated between the front and second or any other pair of rollers by a roller H, Fig. 2, having a V-groove in its periphery, and driven by contact with a top roller, the roller being carried in bearings on a bar H<SP>1</SP> connected to the rear sleeve guide and reciprocated therewith ; a slotted plate adjustably mounted on rods, or a single or double U-shaped pin inserted in holes in a bar, connected to the rear sliver guide may be used in lieu of the roller H.