Patent GB-190912820-A (GB)
Title: Improvements in Weft Supplying Mechanism for Automatic Weft Replenishing Looms.
IPC: D03D45/20
Filed: 1909-06-01
Granted: 1910-04-21
Abstract: 12,820. British Northrop Loom Co., [Northrop Loom Co.]. June 1. Shuttles, changing bobbins and the like in, automatically.-A spare weft-carrier magazine of large capacity is provided, comprising an endless or other belt D, Figs. 4 and 5, provided with elastic wire retainers E for gripping ,the middles of the weftcarriers, which are successively removed from the magazine by a feeder H, and are moved along a guide-shoot, consisting of a butt guide F and a tip guide G, to the transferring position, the weft ends being carried by detachable weft-end holders J, similar to those described in Specification 28,770/04. These holders are removed from the weft-carriers by means of a curved or inclined cam-track, just before the weft-carriers are transferred to the shuttle The belt is carried over two pulleys, one of, which is rotated by a weighted cord 24 and ratchet mechanism, so as to bring the foremost filling-carrier into contact with fixed stops. The ratchet mechanism allows the weighted cord to be wound up without moving the belt. When the transferrer A descends, the feeder H is moved backwards by means of an arm 38 and telescopic parts connected by a spring 40, and the bevelled lower faces of hooks 39 thereon ride upon and over the foremost or active weft-carrier in the magazine, whereupon the hooks fall by gravity, which may be aided by spring-pressed plungers I, and engage behind the active weft-carrier. When the transferrer A ascends, the feeder moves forwards with the active weft-carrier, forcing forwards the weftcarriers in the guide-shcot F, G until the foremost one abuts against a yielding stop 35 and is then in position beneath the transferrer A. The butt guide F embraces the weftcarrier butts sufficiently to prevent substantial longitudinal movement of the weft-carriers. The detachable weft-end holders J may have yielding fingers 41 for engaging the central bores of the weft-carriers, and the weft ends may pass through slots to eyelets 43, preferably formed integral with the fingers. The tip-guide G has a cam-track K, whereby the holders J are gradually detached from the weft-carriers as these are fed along the guide-shoot. When the weft-carrier is in transferring position, the corresponding holder J is still retained in the cam-track, and maintains a hold on the thread during the passage of the transferred weftcarrier through the shed. A flanged cap overlies the cam-track K, the flange being camshaped so as to aid in the detachment of the holders J. Slack thread may be provided in the form of a loop laid on the body of the weft on the weft-carrier, or the cam-track may be so curved as first to detach the holders and then to move them inwards, to provide slack thread before the weft-carriers are transferred into the shuttle. In the latter case, the weft-end holders may have stems fitting the bores of the weft-carrier tips. Annular grooves or recesses and transverse notches in which the weft ends are laid and secured are, in this case, formed in the heads of the holders.