Patent GB-233687-A (GB)
Title: Improvements connected with the shuttle-operating mechanism of looms
IPC: D03D49/46
Filed: 1925-04-25
Abstract: 233,687. Lucas-Lamborn Loom Corporation, (Assignees of Lucas, J.). May 7, 1924, [Convention date]. Picking-motions; shuttles. - The shuttle is handed across the shed by means of two shuttle carriers 17, 17<a>, Figs. 1, 2, and 4, which receive and support the shuttle 83 alternately, the shuttle being transferred from one carrier to the other at the middle of the shed by means of latching and locking devices. The carriers may be reciprocated towards and away from each other by means of links 20 connected by lever mechanism to cranks on a shaft 23, and they are guided by two series of rollers 16, 16a. In one form, wherein the shuttle-supporting means on the carriers have an engagement with the shuttle extending along more than half the length thereof, the shuttle is straddled from opposite directions by pairs of fingers 32, 32<a> projecting towards each other between flanges 34 on the shuttle. Each carrier is provided with a verticallymovable slide 40, 40<a> furnished with a hook 43 to engage behind a corresponding spring-controlled latch 45, 45<a> on the shuttle. In the position shown in Fig. 1, the left-hand hook 43 is latched behind the left-hand latch 45 in the shuttle, so that this is taken out of the shed to the left as the carriers move outwardly. Trippin frames 57, 57a are meanwhile operated by cam-controlled lever mechanism. The frame 57<a> is thus moved upwardly and the frame at the left side of the loom 57 is moved downwardly' whereby a projection 54 thereon is moved into the path of a bumper 55 on a spring-controlled member 52 connected to a bolt 51, which has locked the left-hand slide 40 in a raised position by engaging a recess therein. The member 52 is thus rocked, the bolt 51 withdrawn, and the slide 40 is released, its inclined end 42. which has just previously raised a spring-controlled member 61 on the frame 57, now engages a lug 60 and is thereby forced downwardly in its guide 41, thereby disconnecting the hook 43 from the locking latch 45. The shuttle is thereby unlatched from the left-hand carrier 17, but is meanwhile supported by the fingers 32 thereon. At the right-hand side of the loom, the upward movement of the tripping-frame 57<a> at that side has brought a lower arm 64a into the path of the lower inclined end 42<a> of the right-hand slide 40<a>, which is thereby raised in its guide 41<a> until the recess 50<a> registers with the corresponding bolt 51<a> This springs into the recess and holds the slide raised with its hook 43<a> ready to engage the right-hand latch 45a. When the carriers again move to the centre of the shed, the shuttle is carried by the carrier 17 and is transferred therefrom to the carrier 17<a>, the fingers thereon engaging the shuttle and the raised hook 43a of the slide 40<a> first raising the right-hand latch 45<a>, which thereupon snaps behind the hook 43<a> as shown in Fig. 4. When the carriers next move outwards, the shuttle is moved to the right by the right-hand carrier. The shuttle may have transverse walls with recesses 35 to removablv receive the trunnions 36 of the bobbin 37. Leaf springs 38 may bear against the end trunnions to brake the bobbin. The guides 41, 41a may be provided with cushions 49, 49a of cork, or rubber &c. to engage cross members 46 of the shuttle. In a modification, carriers 17<b>, 17<a>, Fig. 8, are provided with arms 32<b>, 32<c> arranged in pairs for alternately supporting the shuttle 33<a>, which has a locking latch comprising a lever 45b. This is rocked about its pivot so as to be engaged by one or the other of two coupling-hooks 47a, 47<b> on the respective carriers, and be thus locked to one or the other carrier. The lever 45b is rocked by means of members 124, 124<a> connected by levers to members 123, 123<a>, which are operated alternately as the carriers approach one another by a rocking member 129 operated by an eccentric. The members 124, 124<a> have several notches for engagement with springs 126, 126<a> whereby they are retained in positions to which they have been adjusted. A further modification is described wherein electromagnets on the carriers are alternately energized so as to magnetically engage the shuttle. In another modification, carriers 17f, 17g, Fig. 13, are recipro.- cated on guiding-rods 16b and have arms 32f 329, Figs. 13 and 15, projecting from truss-work frames 138 supported by brackets 139. The arms 32f, 32g are formed with upper and lower web parts to engage vertical grooves 34<a>, 34<b> in the top and bottom of the shuttle, and with offset converging shields 140. The shuttle is latched alternately to one carrier or the other by means of spring-controlled hooks 144, 144a, Fig. 14, having cam projections and co-operating with a recess 148. The hooks are overhung by members 147, 147<a>. When the carriers approach one another at the centre of the shed, the hook that is not engaged with the recess, engages the hook that is engaged with the recess and lifts it therefrom, the first-mentioned hook itself then engaging the recess, whereby the shuttle is transferred from one carrier to the other. Cushions 150 are provided. A groove extends lengthwise the shuttle and leads to the recess 148 from opposite directions. A further form is described wherein the shields project along one side of the shuttle and are arranged to pass each other without interference in the innermost positions of the carriers. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the following subject-matter. In a still further form, the shuttle is provided with tapered grooves for engagement with tapered fingers on the carriers, which include tubular members with outer bevelled or curved ends extending to form guards or shields to enclose the fingers and prevent entanglement therewith of broken warp threads. The thread from the bobbin is tensioned by being passed under the angle of a U-shaped wire pivoted to the shuttle. This subject-matter does not appear in the Specification as accepted. Beat-up motions.-The beater 93, Fig. 2, provided with reeds is fixed to a shaft 94 having an arm 96 operated by a lever 99 and verticallyslidable frame 102 carrying a roller 104 engaging a groove in a cam 106 on the shaft 23. The beater does not start to move until the shuttle movements are completed.