Патент USA US2408637код для вставки
Oct. 1,1946. - waHAMm'oN _ __2,408,636' PICKER STICK CHECKING MECHANISM Original Filed May 13., 1944 64' >762 I11 G ~58 ' FIG‘ 3 ' ‘2 Sheéts~Sheet 1 INVENTOR. ' WALLACE HAMILTON BY'.M%M ATTORNEY Oct. 1, 1946. , w_ HAMlLToN 2,408,636 PICKER STICK CHECKING MECHANISM Original Filed May 13, 1944 QPYI _ ' 2 Sheets~Sheet 2 as r v I I 54- 1 __i 72 "17/: 4o 38 g so‘ "“ c ;;;~ 42 30 26 FIG 6 ' - BY 4 INVENTOR. WALLACE HAMILTON ATTOR NEY 2,408,636 Patented Oct. 1, 1946 UNITED STATES PATENT OFFICE PICKER STICK CHECKING MECHANISlVfv Wallace ‘Hamilton, ‘Albany, N. Y., assignor to. Draper Corporation, Hopedale, Mass, a corpo ration of Maine Re?led for abandoned application Serial'No. 535,420, May 13, 1944. This application May 7 31, 1945, Serial No. 596,832 ~ reclaims‘. (01. 139-165)" . - I . -f' struction shown in Fig. 1; . i. . r , w v Fig. 3 is a sectional view taken along the vline I ‘ This. application,.-is re-?led for applicant’s abandoned application, . Serial No. 535,420, ?led May 13, 1944. r . Fig.2,is a view in rear elevation of the ,con ing-mechanisms for ?y shuttle-looms and, as illus trated herein, relates more particularly to picker stick checking mechanisms.v 2 sition of the parts when a shuttle is in the box; , The present invention relates generally to pick III—.III ofv Fig. 1; . Y P Fig. 4 is a view similar to Fig. 1 but showing . » , Prioirgpickerstick checking mechanisms gen erallynincluded a singlerelatively wide looped check;_strap which passes between spaced offset 10 friction fingers which are effective to retard the position of the parts as the picker stick is re. turning to the position shown in Figs. 1 and 2; Fig. 5 is a view in section taken along the line V—,V of Fig.4; and . I‘ . , _ , . Fig. 6.is a section taken along the linev VI-VI of Fig. 4.. _ v strapiwhenrthe strap is moved by the picker stick . The drawings showonlya part, of a loom to as the?pickerstick approaches the, limit of its oscillation. The_picker stick moves at-a high I which the present invention may be applied. rate of speed and thus when it engages the single 15 The parts of the loom, which‘ are neither shown nor described, are of usualconstruction and they wide‘ loop of prior vconstructions an excessive form now partof the present invention. The drawings show aportion or the left hand end of braking orrretarding force is applied to the picker ‘stick.’ This is objectionable. since. it produces excessive wearonthe parts and in some instances results in Vbreakingof the, picker stick, the usual laybeam l0 and a picker stick l2. The usuallshuttle box and shuttle are‘not, shown since the‘ construction and operation of these parts is . Flirt . ermore, the sudden strainimposedon the not necessary to 'a full understandingvof the prese check strap results ultimately in so weakening the strap: that iitmayvbreakh ,It is necessary, there fore, to__provid_e a_relatively heavyand conse ent invention. The picker stick [2 is swung back and forth inthe'usual mannerina slot 14 formed quently expensive strap to provide a strap which 25 will last for a reasonably’ long period of usewith 0UP, blitakilivg, __ . H N. _ , . , ,g , - '‘ Qn'e object‘ of the present invention is to pro vide 'a checkby the use of which, the above ob jectidns will beovercome.__ To this end, and in ac cordance ‘with one feature .of the invention, a check‘strap has‘ been provided which is, secured 'be'neath'vthe lay, and which‘ provides. ianplu'rality of'helically wound loops whichwaresuccessively intheleylw» . I . . ~ _ . . .. .The friction devices for supporting and check ing the movement of a check strap l6 are mount¢ ed ongopposite sidesof the lay H1. The friction devices include a bracket it having a portion 20 .30 under the: lay and“ ?tting against ‘the, bottom thereof and an upwardly'hextending ?ange 22 ?tting against the rear side of the lay. The bracket I8'is secured to the lay It by bolts 24 extending through slots (not shown) in the por engaged by the picker stick thus progressively ape " ‘ tionz?. A The portion 20 of the bracket [8 is pro-_ plying agradually increasing,retardingforce to the" picker stick. ‘Such a construction avoids the necessity'for using an excessively thick strap and 'thus reduces the cost thereof; The villustrated vided with a'dependin‘g friction ?nger 26 ‘which a‘ plurality ‘of loops ‘about the picker stick, the ends of the strap being anchored'on' opposite sides which one end of the check strap I6 is secured'by particular reference to the accompanying draw- > gers 42, M which engage the outer face of the ‘check strap l6 and between’ which the friction ?nger 26 is located. The‘ bracket 40 is arranged to be adjusted forwardly and rearwardly of the strap is relatively long and narrow andcomprises is provided with a rounded surface ‘arranged to I engage'the inner surface of the check strap IS. The portion 20 is‘also provided with a second de pending member 28 to the lower end portion of means of a'capscrew‘3il. The ?ange _22 is pro vided with a rearwardly extending ledge 32 hav of the picker stick.‘ By the use of a plurality of ing a rearwardly extending slot 34 therein. ‘loops, vsubstantially ‘equalforce is applied to each ‘side of the picker stick and'thus ‘causes the‘picker :45 ‘The ledge 32 in its bottom face is provided with 'a forwardly'and rearwardly extending groove _36 "stick to travel in the center of the slot‘in the lay which ‘forms a way fora rib 38 formed on the as the picker is being checked. f ’ “ " upper surface of a'bracket 40. The bracket 40 With the‘above'andother objects and features is provide‘d'with a pair of depending‘ friction ?n in view; the invention'iwill'riow be described" with .ings which illustrate a ‘preferred embodiment thereofand in which:' - ' “ " “ > -' ~~Figx1 is a‘ view in front elevation of the left hand’ end of- a lay having a preferred‘emb'odiment of the invention appliedthereto showing the po lay ID to increase or decrease'the sinuous course of the ‘check strap between'the three friction 2,408,636 4 3 ?ngers 26, 42 and 44. The bracket 40 is provided with a slot 46 which is aligned with the slot 34 in the ledge 32. A bolt 4d passes through both slots and permits adjustment of the bracket 60. A look nut 59 looks the parts in adjusted posi tion. portions of the strap. Thus when the strap is moved when the picker stick approaches the in ner limit of its movement, the resistance of the loop 92 will be somewhat less and hence it is moved more easily. The resistance of the loops 9%] and 94 is substantially greater and hence these ' a similar strap supporting and checking mecha loops will be moved inwardly a somewhat lesser _ distance. nism and includes a bracket 52, having a portion The upper and lower loops 90 and S4, respec The front side of the lay i0 is also provided with 54 extending beneath and ?tting against the bot ll) tively, are effective to maintain the picker stick i2 centered in the slot I4. The upper loop 90 tom of the lay and an upwardly extending flange tends to pull the stick toward the rear while the 56 ?tting against the front side of the lay. The lower loop tends to pull the stick forwardly. bracket 52 is provided with a forwardly extend Since the intermediate loop 92 moves bodily out ing shelf or ledge 58 having a slot 60 therein for receiving a clamping bolt 62. The bracket 52 is 15 wardly and hence imparts no turning movement securely bolted to the lay Ii] by suitable bolts 64, 66. to the picker stick, the opposed forces will offset or equalize each other and the picker stick will remain centered in the slot I4 in the lay. The The bracket 52 is provided with a depending present construction, therefore, presents the ad friction ?nger 68 having a rounded portion for engaging the inner surface of the check strap Hi. 20 vantages of a circular check strap without the necessity of dismantling the picker stick and par The bracket 52 is also provided with a second de allel shoe when it is desired to replace a broken pending member or ?nger it to the upper end check. . portion of which the other end of the check strap Having thus described a preferred embodiment I6 is secured by a cap screw 12. of my invention, what I claim as new and desire The lower surface of the bracket 52 is provided to secure by Letters Patent of the United States with a groove ‘M which acts as a way for an up 1s: standing rib 15 formed on the upper surface of 1. A check for a picker stick including front a bracket 18. The bracket 18 is provided with a and rear brackets ?xed to a lay and having de pair of depending friction ?ngers 8D, 82 which pending friction ?ngers, and a ?exible strap ?xed are disposed at either side of the ?nger E8 and at each end to said brackets and helically thread are each provided with a rounded surface ar ed between said ?ngers to form a plurality of ranged to engage the outer surface of the strap loops arranged to be progressively engaged by I6. The bracket 18 is adjustable forwardly and the picker stick as it approaches each limit of rearwardly of the lay to change the location of the ?ngers 80, 82 and thus increase or decrease 35 movement to check said stick. 2. A check for a picker stick including front the sinuous course of the check strap IE5. and rear brackets ?xed to a lay, depending fric The check strap l5, as previously stated, is se cured at one end to the ?nger 10 of the bracket tion ?ngers on each of said brackets, and a flex 52 by the cap screw 12. The strap then is passed ible strap ?xed at one end to said front bracket rearwardly behind the ?nger 28, forwardly of 40 and at its other end to said rear bracket and heli the ?ngers 42, M and rearwardly of the ?nger 26. cally threaded between said ?ngers on said front The strap then passes forwardly behind the ?n and rear brackets to form a plurality of integral gers 82, 80 and in front of the ?ngers 63, ‘Hi. helical loops about said picker stick to progres This portion of the strap is marked A--A in Figs. 45 sively check movement of said picker stick as it 1 and 4 of the drawings. The strap then passes approaches each limit of its movement. rearwardly behind the ?nger 28, forwardly of the 3. A check for a picker stick including front and ?ngers 42, 44 and rearwardly of the ?nger 25. rear brackets ?xed to a lay, depending friction This portion of the strap is marked B—B in Fig. ?ngers on each of said brackets, and a ?exible 2 of the drawings. The strap then passes for 50 strap ?xed at each end to said brackets and wardly behind the ?ngers B2, 84 and in front of threaded between said ?ngers helically in succes the ?ngers 68, ‘m. The strap then passes rear sive vertical loops in edge-to-edge relationship, wardly and the end portion is secured to the said loops being arranged to be progressively en lower portion of the ?nger 28 by the cap screw gaged by the picker stick to check said picker 30. Thus, the check strap is is wound helically 55 stick as it approaches either limit of its move ment. between the friction ?ngers and about the picker 4. A picker stick check of the type including It is desirable progressively to increase the front and rear brackets ?xed to a lay, depending checking action of the check strap I 5 and the friction ?ngers on each of said brackets, said strap is designed to produce this result. Refer an ?ngers being relieved slightly adjacent to their ring now to Fig. 4, it will be noted that the upper mid portions, and a long narrow ?exible strap loop 90 of the check strap [6 is located near the ?xed at one end to said front bracket and at its outer end of the lay. The loop 92 is located near other end to said rear bracket and helically er the picker stick while the lower loop 94 occu threaded between said ?ngers to form a plurality pies an intermediate position. Thus when the 65 of loops arranged to be progressively engaged picker stick I2 is moved outwardly by engagement by the picker stick as it approaches either limit with an incoming shuttle, the picker stick will of its movement. '_ successively engage the loops 92, 94 and Bil. thus 5. A picker stick check of the type including increasing the retarding effect of the strap as front and rear brackets ?xed to the bottom of the picker stick approaches the outer limit of its 70 a lay on opposite sides of the picker stick slot, movement. To insure that the loop 92 will be stationary and adjustable depending friction ?n engaged ?rst, the portions of the friction ?ngers gers on each of said brackets and a long narrow engaging the portions A~A and 28-13 are slight flexible strap ?xed at one end to said front ly relieved so that the friction on these portions bracket and at its other end to said rear bracket, of the strap are slightly less than on the other said strap being helically threaded between said ~ stick l2. 2,408,686 5 ?ngers to form a plurality of loops of different length arranged to be engaged progressively by the picker stick as it approaches either limit of its movement to check said stick, said ?ngers being arranged to offer less frictional resistance to movement of one of said loops than to move ment of other of said loops, for the purpose de ?ngers on each of said brackets, said ?ngers hav ing slightly relieved portions, and a ?exible strap ?xed at one end to said front bracket and at its other end to said rear bracket, said strap being helically threaded between said ?ngers to pro vide a plurality of loops each of di?erent length and said relieved portions providing different re sistance to movement of different of said loops by I said picker stick whereby increasingly greater re 6. A picker stick check of the type including 10 sistance will be applied to said picker stick as it front and rear brackets ?xed to the bottom of a reaches either limit of its movement. lay on opposite sides of a picker stick slot there WALLACE HAMILTON. 'in, stationary and adjustable depending friction scribed.