Patent GB-458472-A (GB)
Title: Improvements in winding devices for webs, wires, and the like
IPC: D06B3/32
Filed: 1935-06-17
Abstract: 458,472. Wire - winding apparatus; looms. BRETSCHNEIDER, M., 96, Karolastrasse, Plauen, Vogtland, Germany. June 17, 1935, No. 17423. Convention date, June 25, 1934. [Classes 120 (ii) and 142 (ii)] [See also Groups XVI and XXIX] A winding-device for webs, wires, and the like, particularly for use in the treating of full width fabrics, comprises two hydraulic gears of the meshing wheel type or the rotary drum and sliding vane type, driven by a common driving member in the form of a rim surrounding the gear casing and connected to two coaxial torque shafts which project in opposite directions from the gear casing, and each of which is mechanically coupled to one of the two goods rollers, the liquid chamber of each hydraulic gear being divided by a cross wall into two sections, and at least two of these sections being always hydraulically interconnected. The invention is described as applied to the feeding of fabric webs from one roller to another through a dye liquor, but it may be applied for the driving of warp and cloth beams in looms, or for feeding or winding paper, wires, or other materials. In the form shown in Fig. 1, two rollers are driven through bevel gearing from two coaxial shafts 1, 2 which are keyed at their ends to two gear-wheels 3, 4 disposed inside a coupling containing liquid, such as glycerine. The coupling comprises side discs 9, 11, mounted on the shafts 1, 2, and a central disc 10 which is not mounted on either of the shafts, but is provided with an annular disc 13 which locates the disc 10 concentrically of the shafts and also acts as a pulley for a driving belt ; if desired, the outer surface of the disc 13 may be toothed for driving purposes. The discs 9, 10, and 11 are rigidly connected by screws 12. The gears 3, 4 mesh with gears 5, 6 mounted on pins 20 displaceably mounted in the discs 9, 11, and both pairs of gears are mounted within casing members 7, 8 secured inside the coupling. The liquid is contained in the two spaces enclosed by the discs 9, 10, the member 7, and an intermediate wall 14 at one side, and by the discs 10, 11, and members 7, 14 at the other side. Each space for the liquid is further divided by a cross wall into two sections, and liquid can only pass from one section to the other by means of the appropriate pair of gears, so that when the coupling is rotated the liquid finds no outlet, the gears 3, 5 cannot move relatively to each other, and similarly with the gears 4, 6, so that the shafts 1, 2 are driven. The middle disc 10 is perforated to allow the liquid to pass from one pair of gears to the other, and if both shafts 1, 2 have to overcome the same resistance, the pressures in the liquid at each side of the disc 10 will be the same, and the shafts 1, 2 will be rotated at the same speed. If, however, one shaft has to overcome a greater resistance than the other, due, for example, to one roller having a greater diameter as a result of the accumulation of the fabric thereon, a flow of liquid from one section of one pair of gears to the corresponding section of the other takes place, with the result that the speed of the shaft requiring the greater driving power will be retarded, and the speed of the other shaft will be correspondingly increased. Automatic spring-controlled safety valves may be situated in the cross walls in case of excessive pressure being set up in the liquid due to mishaps in the feed of the web, whereby the liquid at each side of the disc 10 can then circulate to allow relative movement of the gears in each pair. The relative speeds of the shafts may be controlled from the outside of the coupling by providing axial bores in the shafts for the liquid to pass and connecting the bores to valves ; in this case the liquid cannot pass from one pair of gears to the other inside the coupling. In a modification shown in Fig. 4, the liquid cannot flow from one pair of gears to the other, and only one shaft is driven at a time. A bush 25 passes through the two cross walls and the disc 10, and oppositely disposed pairs of perforations 26, 27 in the bush allow the liquid to circulate freely at each side of the disc 10. A piston 28 is displaceable within the bush 25, and is shown as covering the pair of perforations 27 thereby preventing the flow of liquid at that side of the disc 10, and consequently when the coupling is rotated the gears 4, 6 cannot rotate relatively to each other, and the gear 4 and shaft 2 are driven at the same speed as the coupling. The gears 3, 5 cannot transmit driving power as long as the perforations 26 remain exposed. When it is required to change the drive from the shaft 2 to the shaft 1 the piston 28 is moved to cover the perforations 26, and for this purpose the piston is mounted on a rod 29 which may itself, or through other connections, be moved by fingers 30, 31 on a slide 32. Byepasses automatically controlled by spring-pressed valves allow the liquid to be byepassed in cases where the driving resistance of the roller to be driven is too great, and the flow of liquid on the non-driving side of the coupling may be regulated by valves to provide a braking effect on the roller. which unwinds the web. The piston 28 may be shaped so that the change of drive from one shaft to the other may be gradual, and without relaxing the tension in the web.