Patent GB-191119165-A (GB)
Title: Improvements in or relating to the Bobbius and Carriages of Twist Lace Machines.
Inventor: PARE FREDERICK WILLIAM
IPC: D04C5/00
Filed: 1911-08-26
Granted: 1912-08-26
Abstract: 19.165. Pare, F. W., and Clark, A. H. Aug. 26. [Cognate Applications, 25,125/11 and 28,065/11.] Bobbins and carriages. -The side plates 1 of the bobbins are separable, not riveted together as usual, and the bobbins are not removed from the carriages for winding purposes but are caused to rotate therein. The yarn is drawn from the inside layers and the bobbins are stationary relative to the carriages when in use. One or both plates 1 may be provided with central thread - receiving bosses 2, and the edges of the plates are spaced by the carriage verge, a yarn-delivering finger, &c. The bobbin may be held in position in the carriage by flush rings 17 fitting down on the dished circumference 5 of the plates 1. Or the edges 5 may work in grooves in the aperture of the carriage and the carriage may be made up of several thin plates secured together. The shoulders of the bosses 2 may be sloped to facilitate the removal of the first few coils of the yarn. One boss may fit into the other as shown at 7, Fig. 7, sufficient space being left for the passage of the yarn. Inspection slots 16 are made in the plates 1. In threading-up the bobbin for winding, the yarn is passed between the bosses and out through the winding-hole 3, or the yarn may be threaded through other holes in the plates 1. The winding-hole 3 may be disposed eccentrically to provide space for a central threading-hole 23, Fig. 22, through which the yarn may be drawn off. The yarn then passes beneath a slidable tension spring 25 attached by pin-andslot connexions 26, 27 to the centre boss, or tension may be put on the yarn by passing it through a series of holes or self-threading eyes. The yarn then proceeds along inclined channels 32, 34 aud through eyes 33, 31. In a modified form of bobbin, the thickness of the central portions 2, Fig. 26, is such that by the use of curved winding washers 22 the side plates may be temporarily bulged inwards to form a yarn-receiving cavity. By suitably proportioning the washers, the pressure on the side plates may effect a diminution in the friction of the plates on the bearing-grooves &c. of the carriages. The yarn in drawing-off passes from the centre of the supply, and between it and one of the side plates. Alternatively the yarn may be wound between one of the bobbin plates and a loose supplemental plate, between which and the other bobbin plate the yarn travels in drawing-off. The supplemental plate may be ridged or sloped to assist in tensioning the yarn, and the plate can be wedged against the bobbin plate by adjustable cams. In another form of bobbin, the yarn is wound upon a winding-spindle of trefoil or similar cross-section, or upon a concentric series of removable pins mounted on the winding-washers or passing through the whole series of washers and bobbins. These pins may be eccentrically mounted or of eccentric formation, so that by rotating the pins the diameter of the winding-hub may be reduced for withdrawal. The winding-spindle may be composed of several portions 60, 61, Fig. 47, the portion 60 being withdrawn first after winding ; or the portion 61 may be spaced apart by being mounted in suitably-sized holes in the winding- washers. Tension arrangements mounted in apertures in the carriage may comprise bowed springs 68, Fig. 51, under which the yarn passes on its way to the exit eye 31. The yarn may alternatively be passed between a pair of bowed springs the length of contact being regulated by inclines. In another form of bobbin and carriage, a thread eye is placed in one of the flanges 17, Fig. 1, for feeding in the yarn during winding, the end of the yarn being passed through the slot 16 or a hole in. one of the bobbin plates. For drawing-off, the end of the yarn is threaded round concavities in the inner edges of the flanges 17 in a similar manner to the threading of the carriage shown in Fig. 22.