Improvements in and relating to the Covering of Wire or other Cores with Fibrous Materials and Apparatus Employed therein.

摘要

6601. Phillips, W. A., and Hutchins, F. March 21. Spinning &c. machines with twist tubes and winding-on bobbins processes.-Relates to a method of and apparatus for covering a thread, roving, yarn, cord, or other core with cotton, silk, rabbits' wool, or other fibrous material which is supplied in the form of a loose roving or untwisted band of fibres, which are first separated and then compacted into a close spiral covering ronnd the core by the action of an air vortex, with or without the subsequent use of pressing-springs &c. The essential part of the apparatus consists of a hollow tube 32, Fig. 3, which is rotated in its bearing 25 at a high speed and is fitted with a head 33, 34 within a fixed case 45 provided with an air and roving inlet 46, Fig. 4, and a cap 52. The core 53 to be covered passes down through a central hole in the bottom of the cap 52, a similar hole in the wiregauze plate 39 covering the inner part 33 of the tube head, and a hollow tube 42 held fixed in a bracket 43. When the roving 54 enters the inlet 46 and an air current is induced from the inlet 46 to the central hole in the gauze plate 39, the roving is drawn against a series of holes 35 in the part 34, which break it up. The air vortex set up in the casing 45 by the rotation of the head then carries the separated fibres to the air outlet, and wraps them round the descending core 53. The part 34 may otherwise be fitted with parallel blades, instead of the holes 34, for stroking and beating the roving, and the air current may be produced by a fan on the head or otherwise by suction or pressure. The cap 52 may be coned, domed, or fitted with a blunt projection, underneath, or with deflecting plates or screens to increase the vortex action. In the machine shown in Figs. 7 and 8, a pair of winding-spindles are mounted in a hollow beam 24, Figs. 3, 7, and 8, connected to an exhaust pump which induces an air current in each spindle through the passages 36, 37. The main shaft c carries a drum f for driving the winding-spindles through cords 30, and drives by worm gearing g, h a shaft i from which motion is transmitted to a chain l by bevel-wheels j. The cores 53 pass from bobbins 3 through eyes 4 to the spindles, and then round guide-pulleys w to take-up bobbins 5, which are carried by rocking levers 6 and are pressed by springs 8 up towards rollers 2 driven by the chain l. The rovings 54 pass from bobbins 18 to the spindles between drawing-rollers 12, 14, 16, which are pulled down by weighted levers 20, and are driven by belts 9 and gearing arranged to cause the rollers to draw out and loosen the roving. The belts 9 pass between the rollers 2 and bobbins 5, and drive the pull-off shaft 1 and drawing-rollers 12 only when the bobbins 5 and rollers 2 are pressed together. The pulleys w are traversed with their support s by means of a weight v and a cam q driven by worm gearing from the shaft o of a sprocket-wheel m. Each core 53 is steadied by fixed pairs 44, 48, Figs. 3 and 4, of blade springs on the cap 52 and on the fixed tube 42, and the covering is compacted by a similar pair 41 of springs within the rotating head.