Patent GB-130536-A (GB)
Title: Improvements in or connected with Weft Parting Means for Weft Replenishing Looms.
IPC: D03D45/20
Filed: 1918-12-10
Abstract: 130,536. British Northrop Loom Co. (Northrop Loom Co.). Dec. 10, 1918. Weft, cutting; shuttles, changing bobbins in, automatically.-In a loom in which the weft bobbin in the shuttle is changed automatically by a transferrer on substantial exhaustion of the weft, a weft parter for the weft of the nearly empty bobbin is connected to and moves in unison with the transferrer and comprises fixed and movable members 2, 3, Fig. 5, which sever the weft within the shuttle just prior to the transfer, the member 3 constituting a detent for the weft end from the leading bobbin in the magazine to prevent its entry between the members, and the weft end between the selvedge and the shuttle eye is withdrawn from the shuttle and carried forwards within the range of action of the selvedge or temple thread parter by an arm 24, Fig. 14, on a rock-shaft 25 on the breast beam 27. The member 3 is pivoted at 5 and the member 2 is adjustably secured to a support 4 adjustably fixed to an arm 6 extending from a hub 6<a> on a sleeve mounted on an extension of the transferrer stud 14, the sleeve being connected by a coiled spring with the tip support of the transferrer so that the members 2, 3 are lowered just in advance of the transferrer into an opening in the shuttle, where they engage and sever the weft extending between the bobbin and the shuttle eye. The closing movment of the member 3 is effected against the action of a spring 18, connecting an arm 3<a> of the member 3 and the support 4, by a chain &c. 16, which is connected to the arm 3a and surrounds the hub of the magazine disk 20 and is tightened as the members 2, 3 are lowered. In a modification, the closing of the member 3 is effected by the action on a bowl at the end of the arm 3<a> of a cam-surface carried by an adjustable arm mounted independently of the lay. The arm 24 is normally in the position shown, and, when the usual shaft 34 that initiates replenishment is rocked, an adjustable arm 35 thereon acts through a rack 37 and a pinion 38 on the shaft 25 to rock this shaft and move the arm 24 rearwards into a groove in the lay so that the weft passes over it. When the shaft 34 returns to its normal position, the arm 24 is swung forwards and its toothed edge engages the weft end and draws it forwards within range of the temple weft parter, projections on the temple head preventing the weft end from passing above or below it. The shuttle feeler 51 has a spring-actuated yielding end portion 51<b> with a downwardly and forwardly inclined edge 51a, which deflects the weft downwards into position to be caught by the arm 24. The shuttle feeler is pivoted at 52 to the magazine stand and connected by a link 54 to a lever 55 pivoted at 56 to a lever 57 on the shaft 34. A spring 58 holds the rear edge of the lower arm 55<a> of the lever 55 against a stop 60 on the lever 57, and a projection 10<a> on the pivoted transferrer latch 10 engages a slot 55<b> in the arm 55<a>. When the shaft 34 is rocked, the levers 57, 55 swing forwards together and the shuttle feeler is moved rearwards to feel for the shuttle. At the same time, the arm 55<a> raises the latch 10 to be struck by the lay bunter 8. If the shuttle is not properly positioned, it strikes the feeler and moves it forwards, causing the lever 55 to turn on the lever 57 and to lower the latch 10.