Patent GB-191106473-A (GB)
Title: Improvements in Shuttle Changing Mechanism of Looms.
Inventor: SMITH ALFRED
IPC: D03D45/34
Filed: 1911-03-15
Granted: 1912-03-15
Abstract: 6473. Smith, A., and Perks, T. March 15. [Cognate Application, 8651/11.] Shuttle-changing mechanism of the type wherein the usually operative parts of the loom are stopped while the shuttle is being changed. The depleted shuttles are received in a flexible receptacle 12<a>, Fig. 1, which is secured to a bracket 12 on the loom endframe and to a cross-piece on the lever 11<c>, Figs. 1 and 13, carrying the transferrer or shuttle - carrier 11<f>. When substantial weft-exhaustion occurs, a detector shaft 16<e>, Figs. 1 and 6, is rocked and, bv means of a lever 16<d>, rod 16‹, and lever 16<b>, gives a slight oscillation to a lever 17 pivoted at 17<a>. This lever is provided at one end with a stud 18 engaging a clutch 5 fast to the sleeve 4b of the loose pulley 4, and at the other end with a bowl 17<b>, Figs. 1 and 7, engaging a cam 7<a> on a wheel 7 provided with the cams 8<a> &c. that cause shuttle - changing to occur. The clutch 5 is moved towards a clutch 6 in gear with the wheel 7, while the bowl 17<b> is disengaged from a notch in the cam 7<a>, thus allowing the wheel 17 to be rotated by the action on one of the cams thereon of a spring-controlled lever. The cam part 7<b> then causes a further movement to be given to the lever 17, whereupon complete engagement of the clutches 5, 6 is effected. The wheel 7 is then rotated by the loose pulley, the driving-strap having been moved thereon from the fast pulley by belt-shifting mechanism 14, 14<a> operated by the detector mechanism. The cam 8<b> on the wheel 7 first comes into action and, by means of a lever, rod 10<a>, and bracket 10<c>, Figs. 1 and 13, causes the shuttlebox front 10 and back 10<b> to be raised, somewhat as described in Specification 20,959/02. The bracket 10<c> carries a shaft 10<d> provided with pinions 10<e> gearing with fixed racks 10<f>, so that, as the bracket 10<c> rises, the shaft 10<d> rotates and causes a plate 10<g> to be raised into alinement with a plate 10<h> fixed to the lay. The shuttle is then pushed over the plate 10<b> on to the plate 10<g> by a pusher 9<e> actuated by a lever 9<c>, a rod 19<b>, a lever 9<a>, and the cam 8<a>. By means of another cam and a lever, the yielding lever 11<c> is operated so that the shuttle-carrier 11<f> carries a shuttle from the magazine into the shuttle box. If any obstacle is encountered, the lever 11<c> yields and prevents breakages. The pusher having receded, the shuttle-box back and front fall, and the plate 10<g> is lowered into the position shown, spring fingers 12<k> removing the shuttle therefrom when the lever 11<c> recedes and depositing the shuttle within the receptacle. A cam 8 then rocks a lever 13, on which is pivoted a lever 13<a> provided with a catch 13<d>, which is normally held in engagement with a notch u in the lever 13 by a spring 13<e> and is connected by a rod 13<b> to a lever 13<c>. The lever 13<c> is thus normally rocked and, by acting on a part 114<a>, rocks the belt-shipper lever 14<a>, whereby the belt is moved on to the fast pulley and the loom is re-started. The catch 13d is provided with a peg 13<f> engaged by a slotted rod 19 connected by a lever 18<d> and rod 18<c> to a lever 18<a>, which is provided with a blade-spring 118 to engage the shuttles in the magazine. If no shuttle is present in the magazine, the lever 18<a> is rocked by a spring 108<c>, and the slotted rod 19 causes the catch 13<d> to be withdrawn from the notch u, so that the lever 13 moves idly, the lever 13<a> not being actuated, so that the belt is not shifted to the fast pulley. Subsequently, a spring 117, Fig. 6, draws the bowl 17<b>, Figs. 1 and 7, on the lever 17 into the notch in the cam 7<a>, so that the rotation of the wheel 7 and cam 8 &c. is stopped, the lower part of the lever 17 being pivoted so as to yield against the action of a spring 11<f> and thus give a buffer effect. The engagement of the catch 13<d> with the notch u is also prevented if the shuttle has not properly entered its box, since, in this case, it fails to move the stop-rod finger, whereupon a holding hook or catch prevents the descent of the bracket 10<c>, as described in Specification 10,142/03, and a projection 15 on the lever that actuates the bracket 10<c> thereapon prevents engagement of the catch and notch. A rod 14<d> is provided for actuating the belt-shifting mechanism by hand.