Патент USA US2407056код для вставки
Sept; 3, 1946'; ‘ B. w. BROUWER, » " PIcKINé SHOE ’ “2,407,056 Filed June‘l5, 1945 FIG.‘ 1. / _ I ‘ IN VEN TOR.» HWWM 2,407,056 Patented Sept. 3, ‘1946 UNITED STATES PATENT OFFICE 2,407,056 PIQKIN G ‘SHOE Benjamin W. Brouwer, Auburn, Mass, assignor to Crompton & KnowleswLoom Works, Worcester, Mass, a corporation ofiMassachusetts > Application June 15, 1945, Serial No. 599,671 5 Claims. (0!. 139-150) 2 This invention relates to improvements in pick- ‘7 IE on which is rotatably mounted a picking roll ing mechanisms for looms and it is the general . object of the invention to provide a picking shoe so constructed as to facilitate checking of the or ball [6 for engagement with a cam I 1 se cured to a picking shaft 18. The latter is mount ed. for rocking movement in bearings secured to inward stroke of the picker stick and also assist the loom frame II]. A sweep arm 19 extends up the stick to return to its normal outward position. ‘r’ wardlyfrom shaft l8 and is attached to a sweep In certain types of picking mechanism the bot stick 2B, the outer end of which is connected to tom end of the picker stick is secured to a shoe a picker stick 2|. During loom operation shaft which rests on a rocker iron mounted to swing 13, rotates everyvsecond pick of the loom and the roll I 6 engages the cam I’! to move the picker stick to the left as viewed in Fig. 1 to pickshuttle S when the lay is about at top center on its back ward stroke. Secured to the rocker shaft I4 is a rocker iron 25 having an upper flat surface 26 and provided with the lay. As heretofore made the shoe has been provided with an under surface curved ' throughout its length. As a result of this con— struction the shoe rolls or rocks along the rocker iron throughout the picking stroke with no ap preciable retarding effect on the stick at the inner end of the picking stroke. ‘ It is an important object of my present in vention to provide the shoe with an under sur face part of which is curved and part of which a' with a vertical lengthwise slot 21. A lug 28, see Fig. 3, depends from the rocker iron and car ries a stud 29 ‘on which is rotatably mounted a spring drum 30 to which a strap 3! is secured. is straight, and relate these two parts of the shoe 20 A torsion spring 32‘ surrounding the drum tends to the rocker iron in such a way that the straight ‘ " normally to turn the drum in a clockwise direc surface of the shoe engages the rocker iron near tion as viewed in Fig. 3 and resist movement of ~ the end of the picking stroke. As a result of the strap 3| to the right or outwardly away from this construction the greater part of the shoe is the loom frame. ’ lifted away from the rocker iron near the end .25 A picking shoe 35 rests on the surface 26 ‘and of the working stroke of the stick and sets up has a vslot 36 through which projects a tongue increased strains in=~the return spring which tend 31 projecting upwardly from the rocker iron 25. to check the stick.‘ These increased strains also The right end of’ the strap 3! is secured as at 38 hasten the outward or return movement of the to the lower outer part of the picker stick. stick to normal position. A bolt 40 passes through a cleat 4|, the picker With these and other objects in View which '5" stick, and the upright wall 42 of the shoe 35. will appear as the description proceeds, my in By means of the bolt and cleat the left edge of vention resides in the combination and arrange the picker stick as viewed in Fig. 3 is forced ment of parts hereinafter described and set forth. against an inverted .T-shaped guide 43 which In the accompanyingdrawing, wherein a con extends along the inside of wall 42. The lower venient embodiment of my invention is set forth, M end of the guide 43 extends through the slot 2‘! Fig. 1 is a front elevation of a part of the loom ' and the bottom of the guide 43 is provided with having my invention applied thereto, and show oppositely extending lugs 45 which can engage ing the picker stick and shoe in the positions they occupy at the beginning of a picking or work 40 the side walls 46 of the shoe 25 forming the sides of slot 21. A roll 50 turns on a stud 5| extend ing stroke, ' ' ing between the walls 46 and the spring 32 ‘and Fig. 2 is an enlarged horizontal section on line strap 3| act to hold the left edge of the guide 2-2 of Fig. 1, 43 against the roll 50, see Fig. 3. ‘ Fig. 3 is an enlarged front elevation, parts in A second bolt 52 is threaded through the wall section, of the shoe shown in Fig. 1 but with the 45 42 and bears against the upper end of guide 43 shoe shown in that part of the picker stick stroke ‘ ‘ and,‘ together with the bolt 49, affords means for effecting slight angular adjustments of the where the ?at surface of the shoe engages the rocker iron, Figs. 4 to 7 are diagrammatic views showing the manner in which the invention operates, and ‘ Fig. 8 is a vertical section on line 8-8 of Fig. 3. Referring to Fig; 1, the loom frame l0, lay H, lay sword i2, bottom shaft l3, and rocker shaft I 4 may all be of usual construction. The bot tom shaft [3 has secured thereto‘a picking arm 55 ‘picker stick with respect to the shoe. ' The matter thus far described except as noted hereinafter is of the usual construction and op erates in‘ the usual manner except for an upward ‘movement of the picker stick accompanied by rolling of the guide 43 along the roll 50 at the end of the picking stroke, as will be pointed out hereinafter. \ ‘ 7 \ ' 2,407,056 3 The under surface of the shoe 35 is made in the general form shown more particularly in Figs. 3 to 7. The outer part of this surface may be curved and convex with respect to the sur face 26, but approximately at the point where this curve reaches the picker stick or guide 43 the curved surface 6!! ends, and merges with a 4 provided simple means by which a picker stick can be checked at the end of its inward stroke and started back with a quick return movement due to the fact that the under surface of the shoe is provided with a straight surface 6 I. This surface merges with the curved surface til at a point 62 adjacent to the guide 43 and the picker stick. The straight surface 6| engages the sur straight flat surface 6|. The point of joining of face 26 at about the time that the cam I‘! has these curved surfaces 60 and BI, designated at received its full motion from the picking roll l5. 10 62, will be located about as indicated in Fig. 3, Having thus described my invention it will be that is, at or to the right of the guide 43 and seen that changes and modi?cations may be made to the right of a vertical line passed through roll therein by those skilled in the art without de 50. The straight surface 6| extends toward the parting from the spirit and scope of the inven loom along the left end of the surface 26, Fig. 3. tion and I do not wish to be limited to the details Under normal conditions preparatory to a 15 herein disclosed, but what I claim is: picking operation the parts will be in the position 1. In picking mechanism for a loom operating shown in Figs. 1 and 4 with the picker stick in its with a picker stick and having a rocker iron outermost position and with the convex curved which oscillates with the loom lay and is provided surface Bil in engagement with and tangent to the surface 26. Under these conditions all of 20 with a ?at upper surface, a shoe secured to the picker stick and resting on said ?at surface, said the straight surface 6| will be above and out of shoe having an under surface part of which is contact with the top surface 26 of the rocker iron convex and part of which is straight, and resil 25, being held in that position by the spring 32 ient means holding the shoe and picker stick and strap 3!. As the roll l6 engages the cam l‘! the sweep stick 20 will cause the picker stick 25 normally in such position that the convex surface of the shoe engages the ?at surface of the rocker 2| to move to the left to propel the shuttle S to iron and the straight part of the under surface the opposite side of the loom. of the shoe is above said flat surface, said ?at During the picking stroke the shoe 35 rolls upper surface, convex and straight surfaces being along the rocker iron 25 and passes through the intermediate position shown in Fig. 5. The parts 30 so related that the picker stick during the ?rst part of a working stroke thereof causes the con of the picking mechanism are so related that vex surface to rock along said ?at surface and the cam 11 will be given approximately its full during a later part of the working stroke causes motion by the roll it at about the time that point the straight surface of said shoe to engage said 62 between surfaces 60 and BI engages the sur face 26, or when the parts reach the position 35 ?at surface prior to the end of the Working stroke of the stick, the end of said straight sur shown in Fig. 6. At this time therefore the full face remote from the convex surface forming a power of the picking force has been imparted to temporary pivot with said ?at surface near the the shuttle and the useful working stroke of the end of the working stroke of the picker stick to picker stick has been completed. The picker stick however continues to move to the left as 40 cause upward movement of the shoe relatively to the rocker iron against the action of said re viewed in Fig. 1 due to its momentum, but as it silient means. continues to move the point of contact between 2. In picking mechanism for a loom having the surface 26 and the shoe moves rapidly to the a picker stick which moves from the normal posi left, or to the end of the straight surface 6| to the point designated at a in Fig. 7. This point a 45 tion thereof on a working stroke thereof, the loom having a rocker iron which oscillates with the becomes the pivot around which the picker stick loom lay and is provided with a flat upper surface, and its shoe rocks in a counterclockwise direc a picker shoe secured to the picker stick and hav tion as viewed in Fig. 3 against the action of ing a convex bottom surface extending from one spring 32, thereby effecting a sudden applica tion of restraining force to the picker stick which 50 end thereof toward the stick and having also a straight surface merging with the convex surface tends to arrest the latter and overcome its mo extending from the other end thereof toward mentum. When the picker stick has come to the stick, and resilient means normally holding rest the surfaces 6!] and BI out of contact with the picker stick and shoe in such position that the surface 25 except for the left end of the sur face 6 l , and spring 32 will tend to move the picker 55 said convex surface engages said ?at surface of the rocker iron and said straight surface is above stick to the right as viewed in Fig. 1 to return it said flat surface, the ?at surface of the rocker to its normal outward position shown in Fig. 1. iron and said convex and straight surfaces being Because of the spring and the fact that the inner so related that the picker stick on a working or left end only, Fig. 3, of the shoe engages the rocker iron, the stick tends to return rapidly from 60 stroke thereof causes the convex surface of the shoe to roll along said flat surface of the rocker the position shown in Fig. 7 to that shown in Fig. iron during the ?rst part of the working stroke 6 and then continues to move through the po of the picker stick and causes the straight part sition shown in Fig. 5 until it reaches the posi of said shoe thereafter to engage said flat surface tion in Fig. 4. During upward movement of the picker stick 65 during the remainder of the working stroke of the picker stick and causes that end of said when the parts move from the position in Fig. 6 straight surface remote from the picker stick to to that shown in Fig. 7 the guide 43 moves along form a temporary pivot with the said ?at surface the roll 58. The guide 43 is held against the roll to effect upward movement of the shoe relatively 55) by spring 32 throughout the entire, rocking movement of the shoe, this rolling movement 70 to the rocker iron as the picker stick approaches the end of its working stroke. being down with respect to the roll 50 while the 3. In picking mechanism for a loom having a surface Ell is rocking along the surface 26, and picker stick which moves from the normal posi being up when the picker shoe turns around the tion thereof on a working ‘stroke thereof, the loom point a as a center. —\ From the foregoing it will be seen that I have 75 having a rocker iron which oscillates with the 5 2,407,056 loom lay and is provided with a flat upper sur face, a picking shoe secured to the picker stick and having convex and straight under surfaces for successive engagement with said ?at surface during a working stroke of the picker stick, resil ient means connected to the picker stick and nor mally holding the shoe with the convex surface thereof in engagement with said ?at surface, and 6 so related to said ?at surface that the convex part rolls along said ?at surface during the ?rst part of the operation of the picking mechanism, said straight part thereafter engaging said ?at surface during the latter part of the operation of the picking mechanism and cooperating with said resilient means and flat surface to arrest the momentum of the picker stick. means causing said resilient means to resistmove 5. In picking mechanism for a loom having ment of the shoe with respect to the rocker iron 10 picking mechanism operative to move a picker from the normal position of said shoe to a position stick toward the center of the loom on a picking in which the straight surface of said shoe engages stroke, the picker stick because of the momen said ?at surface, the picker stick on a working tum thereof continuing to move toward the cen stroke thereof causing said convex surface to roll ter of the loom after completion of operation of along said ?at surface of the rocker iron and then 15 the picking mechanism, a rocker iron located ad cause engagement of said straight surface with jacent to the lower end of the picker stick and said ?at surface and thereafter causing said shoe having a ?at upper surface, a picker shoe se to move about a temporary pivot between the cured to the lower end of the picker stick and ?at surface and that end of the straight surface resting on said ?at surface, and resilient means remote from said convex surface against the ac 20 connected to the picker stick tending to hold the tion of said resilient means. latter and the picking shoe in normal position 4. In picking mechanism for a loom having preparatory to the beginning of a Working stroke picking mechanism operative to move a picker of the picker stick, said shoe having a convex stick toward the center of the loom on a picking surface which engages said ?at surface of the stroke, the picker stick because of the momentum 25 rocker iron when the picker stick and shoe are thereof continuing to move toward the center of in normal position and said shoe having a the loom after completion of operation of the straight surface merging with the convex surface picking mechanism, a rocker iron located adja and adapted for engagement with said flat sur cent to the lower end of the picker stick and hav face near the end of a picking stroke of the picker ing a ?at upper surface, a picker shoe secured‘to 30 stick, said picking mechanism operative to give the picker stick and extending on opposite sides the picker stick a working stroke and cause said of the latter with respect to the center of the convex surface to roll along said flat surface dur loom, the under side of that part of the picker ing the ?rst part of a picking stroke of the picker shoe beyond the picker stick with reference to stick and thereafter cause engagement of said the center of the loom being convex and the under 35 straight surface with said flat surface, the picker part of the picker shoe between the picker stick stick thereafter upon completion of operation of and the center of the loom being straight, said the picking mechanism tending due to the mo convex and straight parts being adapted for suc mentum thereof to continue the working stroke, cessive engagements with said ?at surface, and that end of the straight surface remote from resilient means normally holding the picker stick the convex surface thereupon forming a tempo and shoe in a position corresponding to the be rary pivot with the ?at surface around which the ginning of ‘a working stroke of the picker stick picker shoe and stick move as a center against with said convex part engaging said ?at surface, the action of said resilient means. said convex and straight parts of the shoe being ' BENJAMIN W. BROUWER.