Патент USA US2138221код для вставки
Nov. 29, 1938. R. G. TURNER ‘2,138,221 SHUTTLE FOR AUTOMATIC LOOMS I Filed Jan. 2, 1937 - Inventor Richard fl‘rTurner £44m?! Attorney Patented Nov. 29, 1938 . * 2,138,221 UNITED STATES PATENT OFFICE 2,138,221 SHUTTLE FOR AUTOMATIC LOOMS Richard G. Turner, Worcester, Mass., assignor to Crompton & Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application January 2, 1937, Serial No. 118,787 4 Claims. (Cl. ‘139—207) This invention relates to improvements in auto- the shuttle when the latter is being boxed and matlc looms and more-particularly for means for preventing spring clips from spreading due to momentum of the bobbin when the shuttle is .5 boxed. When bobbins oval in transverse section are used it is necessary to maintain the long trans- therefore eliminate possibility of the bobbin turn ing on its axis. With these and other objects in view which verse axis horizontal. If this axis becomes ver- tical the lower edge of the weft projects below ‘to the bottom of the shuttle and interferes not only with correct shuttle boxing, but also‘ interferes with the lower sheet of warp threads during. the ?ight of the shuttle. ‘ It has been discovered that there is a tendency is on the part of a bobbin to rotate about its longi- tudinal axis during weaving, particularly when a bobbin is held by means of spring jaws which en- gage rings on the head of the bobbin. An angular motion su?icient to give the bobbin a quarter turn 20 would place the long transverse axis vertical and interfere very objectionably with the proper picking of the shuttle and result also in damage to the lower part of the mass of weft, The shuttle moves at a high rate of speed and in 5 is brought to rest abruptly by engagement with will appear as the description proceeds, my in- 5 vention resides in the combination and arrange ment of parts hereinafter described and set forth. In the accompanying drawing, wherein a con Vehieht embodiment of my invention is Set forth, Fig. 1 is a top plan view of one end of a lay 10 Showing a Shuttle made according to my Dreseh invention, ' Fig. 2 is a. vertical section on an enlarged scale On line 2-2, Fig- 1, Fig. 3 is a diagrammatic view illustrating the 15 transfer mechanism, and Fig- 4 is a horizontal Section on line 4——4 of Fig- 2 Referring more particularly to Fig- l, I have shown a 100m lay “1 having‘ a Shuttle bOX B to .20 receive a shuttle S provided with a bobbin H. The bobbin may be of the so—oa11ed oval or flat type wherein the barrel on which the weft W is wound has a horizontal transverse dimension the picker. This stopping or" the shuttle mo~ tion is attended with considerable shock and as a result there is a tendency on the part of the bobbin to continue movement in the direction of 39 travel of the shuttle due to its momentum. Because of the shape of the contacting surfaces between the rings and the spring jaws the latter spread slightly due to the fact that the bobbin tends to continue its motion when the shuttle is abruptly stopped. When the momentum of the bobbin is spent the jaws move back to their normal position. If at this time the spring forces acting on the bobbin are not balanced there will be a slight turning moment tending to rotate the 40 bobbin about its longitudinal axis. It is an important object of my present invention to prevent the aforesaid slight spreading of the jaws when the shuttle is boxed. As set forth hereinafter I accomplish this result by pro45 viding the shuttle with resilient blocks or" rubber or the like which are suf?ciently strong to resist spreading of the jaws by any force which greater than the vertical dimension and the weft takes the gener-alformihdioated in Fig- 2. The bobbin has a head E15 prdvided'with ‘the customary metal rings [6 which are received by a Spring Clip IT having front and real‘ laws l8 and '9, respectively These laws are grooved in the usual manner, a Suggested in Fig- 4. to receive the rings '5- The rings and the Wooden head of the bobbin on which they'are mountedtogether With the Spring 011D n are of the usual Construc tion. The box B has a shuttle binder 28 and a binder Spring 21 and the Shuttle 15' plhpelled- by a picker 22 in the usual way. When the shuttle is boxed it strikes the picker 22 with considerable force and is brought to rest abruptly, since the picker lies against the box end 23. As a result the bobbin, because of its momentum, tends to move toward the picker and the round rings bearing against the bevels 25 of the sides of the grooves 26 tend by reason of the force exerted due to momentum to spread the jaws slightly. This force is not very large but is su?icient to cause a temporary separation may be exerted by the rings of the shuttle against the bevelled grooves of the jaws incident to box- of the jaws l8 and I9. The matter thus far described is of known 50 ing. The blocks, however, are suihciently re- silient to yield under the positive force exerted by the transferrer at the time a new bobbin is being inserted into the shuttle. By provision of these means I maintain close contact between 55 the rings of the bobbin and the spring jaws of 25 30 v35 40 45 construction and of itself forms no part of my 50 present invention. In carrying my invention into effect, I pro vide the shuttle with blocks 30 of slightly resilient rubber which are interposed between the front and back shuttle walls 3| and 32, respectively, 55 2 2,138,221 as shown, and the jaws I8 and I9, respectively. These blocks may be recessed into the shuttle walls or held therein in any other approved manner. The blocks 30 bear against the outer ing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: 1. In a shuttle for an automatic loom, integral vertical walls of the adjacent jaws and create sufficient resistance to prevent spreading of the shuttle by momentum of the bobbin when the shuttle is boxed. spaced resilient bobbin holding jaws mounted in the shuttle, a bobbin having rings held by the jaws and tending by the momentum thereof to spread the jaws apart when the shuttle is boxed, and It is necessary to make provision for trans IO ferring a new bobbin into the shuttle, and this result may be accomplished as shown in Fig. 3 by a transferrer arm 40 movable about a pivot 4| and is actuated by a latch 42 pivoted to the arm at 43 and movable by mechanism not shown but a block of slightly resilient material for each jaw, each block located between and contacting 10 the corresponding jaw and an adjacent part of the shuttle adjacent to the rings, said blocks resisting the tendency of the jaws to spread apart when the shuttle is boxed. 2. In a shuttle for an automatic loom, in well understood into the path of the dagger 44 on the lay. A reserve bobbin 5!] is presented in any tegral spaced resilient bobbin holding jaws mount approved manner under the transferrer arm when ed in the shuttle, a bobbin head with rings held a transfer is to take place. The advancing lay depresses the rear end of the transferrer arm to force the reserve bobbin 50 against the bobbin lever. At this time the blocks 30 will not be able to prevent spreading of the spring jaws under the action of the positive force exerted by the trans ferrer arm, and the reserve bobbin 50 will there fore pass into the shuttle and the depleted bobbin I I will be expelled downwardly through a slot Si in the lay. As soon as the transferring action is completed the blocks 30 will spring back to their normal condition where they are effective to re sist a separation of the jaws when the shuttle is boxed. It is to be understood that my present inven tion contemplates a particular relationship be tween three forces the strongest of which is ex erted by the transferrer arm through the in coming bobbin and the weakest of which is ex erted by the momentum of the bobbin tending to spread the jaws when the shuttle is boxed. Lying intermediate these two forces is the re 40 sistance offered by the blocks 30, these blocks being strong enough to resist compression when the shuttle is boxed, but yielding sufficiently to by the jaws and tending by the momentum there of to spread the jaws apart when the shuttle is boxed, and a block of slightly resilient rubber for 20 each jaw, each block of rubber engaging the shuttle and also the corresponding jaw adjacent to the rings on the head, said blocks resisting the tendency of the jaws to spread apart when the shuttle is boxed. 25 3. In a shuttle for an automatic loom, a pair of integral resilient substantially parallel jaws mounted in the shuttle and extending along walls of the shuttle and having grooves therein, a bobbin having a head provided with rings to 30 enter the grooves of the jaws, said bobbin tend ing by its momentum to spread the jaws apart when the shuttle is brought to rest, and a block of resilient material between each jaw and the adjacent shuttle wall acting in addition to the 35 resilience of the jaws to prevent separation of the latter by the momentum of the bobbin, said blocks being located between the grooves in the jaws and the adjacent shuttle walls. 4. In a shuttle having spaced vertical walls, a 40 spring member mounted in the shuttle and hav ing two spaced resilient integral jaws, each jaw permit a normal transfer when the transfer arm extending along one of the walls, each jaw hav 40 descends. From the foregoing it will be seen that I have provided a shuttle wherein the spring jaws are ing transverse grooves therein on the sides there prevented from separation by engagement with the slightly resilient means interposed between the jaws and the walls of the shuttle when the shuttle is boxed. It will also be seen that the resistance offered by these resilient means rep resents a force which lies between that exerted by the transferrer arm and the force of the mo mentum derived from the bobbin when the shuttle is boxed. Having thus described my invention it will be seen that changes and modi?cations may be made therein by those skilled in the art without depart 15 of opposite the adjacent wall, a bobbin having 45 a head provided with holding rings which enter the grooves in the jaws, the momentum of the bobbin tending by reason of contact between the rings and the jaws to spread the latter when the shuttle is brought to rest, and a block of rubber 60 between each jaw and the adjacent shuttle wall, each block of rubber engaging the corresponding jaw along the surface opposite the grooves there— of and acting in addition to the resilience of the jaws to resist spreading of the latter by the bobbin when the shuttle comes to rest. RICHARD G. TURNER.