Patent GB-228174-A (GB)
Title: Machines for use in the manufacture of textile fabrics
IPC: D03D37/00
Filed: 1925-01-22
Abstract: 228,174. Electro Magnetic Loom Corporation, (Assignees of Bauer, C. G.). Jan. 22, 1924, [Convention date]. Void [Published under Sect. 91 of the Act]. Shuttleless looms; circular looms. - In a circular shuttleless loom of the kind described in Specification 215,733 for weaving tubular fabric alone or on a wire core, improved means are employed for transferring warp bobbins from one series to the other; for assisting in the removal of the fabric from the mandrel or core: for guiding the wefts and warps to the weaving point, and for taking up the woven fabric. The warp bobbins 34, Fig. 1, are slidable on supporting- pins and are moved by electromagnetically controlled plungers 42 alternately from one series to the other as determined by a commutator. Spaces are left between the inner ends of the bobbin-supporting pins to permit the passage of the wefts. Each bobbin has flanges 37, Fig. 4, secured to an iron core 35 which is movable, from one supporting-pin 36 to an opposite one, by a plunger 42 slidable on the pin and movable within a non-magnetic core 52 of an electromagnet. The movement of the plunger on the pin is controlled by a spring 44, and the pin is removable to allow of the insertion of fresh bobbins. The cores of the bobbins are undercut and the ends of the plungers are tapered to facilitate centering. When neither of a pair of magnets is energized, the springs 44 move the plungers to carry the bobbin into a central position, and upon one of them being energized, the corresponding plunger moves into the core, the motion of the bobbin being assisted by the spring 44 of the other plunger. The motion of each plunger is limited by shoulders 48, 50 on the plunger and pin 36. Leather cushioning members 66 carried by the electromagnets lessen the impact of the bobbins when they are moved to change the shed. Four wefts are inserted between the bobbins by rotating arms driven by chain and sprocket gearing. Each arm carries a weft bobbin 114, Fig. 1, the weft passing over a pulley 118, a pin 120, and through a pair of spring-pressed discs 122. The wefts and warps are guided to the weaving point by a " condenser " 40, Figs. 13 and 15, having corrugations 152 arranged tangentially to the core to be covered or to the mandrel over which the fabric is drawn. The condenser is rotated at twice the speed of the weft-inserting arms but in the opposite direction and acts in conjunction with a " weft-pounder " 144 having four radial ratchetlike corrugations. The weft-pounder is rotated in the opposite direction to that of the weftinserting arms and at the same speed and is reciprocated so that its corrugations engage the fabric between the wefts extending from the weftinserters. When fabric is woven with a core, the condenser and weft-pounder are not rotated, and when the fabric is woven alone, a tapered mandrel is passed through those parts. Take-up motions.-The woven fabric with or without a core passes a number of times around a feed drum 214, Fig. 18, and is acted upon by a spring-pressed grooved wheel 216. The drum is driven by a pinion 248 meshing with one of a series of concentrically-arranged holes in the face of the drum. To change the rate of takeup, the pinion 248 is moved along its wormdriven shaft 250 to engage a different set of holes.