Патент USA US2135098код для вставки
Nov. 1,1938. $135,098 w. P. BODIE ~ LET-OFF MECHANiSM FOR LOOMS Filed May 7, 1938 2 Shée’cs-Sheet l . Cd W‘ “F'‘M I'IHIHI w’ l ' Q v ) é - ‘ ' I § . wmw ' Nov. 1, 1938.’ W. P. BODIE . 2,135,098 LET-OFF MECHANISM FOR LOOMS Filed May 7, 1938 2 Sheets-Sheet 2 Patented Nov. 1', 1938 _ 2,135,098 , v UNITED STATES PATENT OFFICE ~ 2,135,098 LET-OFF MECHANISM‘ FOR LOOMS ‘ William P. Bodie, Newberry, S. 0. Application May 7, 1938', ‘Serial"No.‘206,659v 5 Claims. ‘(01. 139-7167,) This invention relates to a let-off mechanism 'tively engaged with a pinion 2 carried by a shaft Brotatably supported by the frame F and extend-' invention to provide means by which. effective ing laterally beyond a side thereof. Fixed, as at I‘ strain or tension may be imposed automatically 4, for ‘rotation with the shaft 3 are the ‘disks 5 for looms, and it is primarily an object of the videra tensioning structure for the beam includ spaced apart as desired lengthwise of said shaft 3. ' _These;disks 5 are of desired radius and are .provided in their opposed. faces withthe cir- - ing a rotatable element in driven connection‘ with cumferentially spaced and radially disposed the beam and which carries a plurality of era grooves‘ orchannels v6 which open through the , , upon the yarn beam. , It is also an object of the invention to pro, i0l dially movable weighted members together with] peripheral edges of the disks 5 as is clearly illus a brake shoe for coaction with said' weighted trated in the‘ accompanying drawings. ‘Each of membera'said brake’ shoe being so mounted as‘ to'automatically moveaway from the axis of re tation of the rotatable element as the diameter 15 of the thread upon the beam diminishes. The invention consists in- the details of con _ the grooves; or channels 6 of a‘ disk 5 is parallel struction and in the combination and arrange in proper relation so‘ that there may be slidably ment of the several parts [of my improved ‘let-off engaged therein the guide ?anges 1 extending outwardly from the weighted membersB. Each mechanism’ for looms’ whereby certain important 20.» advantages'arel-attained and the device rendered simpler, less expensive and otherwise more con-_ venient and advantageous for use, as will be hereinafter more fully set forth. ' The novel features of my invention will here 25.\ inafter be de?nitely claimed. - ~ ' I‘ In order that my invention may be the better understood, I will now-proceed to'describe the‘ same with reference to the accompanying draw- , ings, wherein:—l to a groove or channel 6 in the opposed face of the second disks 5 or, in other words, the grooves or ‘channels 6 of the disks 5 arezarranged in 15' pairsrwith'the grooves or channels 5 of each pair . of the members‘9 at‘the longitudinal center of its outer ‘marginal portion is provided with a rel atively large recess ID, the inner or bottom wall I l of which is outwardly rounded in‘ order for the most effective coaction with the arcuate brake shoe‘ 8 which is received within the recess ll. of' 25 each-of the members 9 as the disks 5 rotate. After the weighted members Shave been prop erly applied between the disks 5, the extent of their‘ outward radial movement is limited by con ' > Figure 1 is a fragmentary view in‘ top plan tact with the holding bands I2 which made 30 illustrating a let-off mechanism‘ constructed in - t'achablyv secured by the screws I4 or otherwise as may be preferred to- the peripheral edge faces accordance with an embodiment of my inven tion and in applied position; ‘ ‘ ' Figure 2 is a vertical sectional view taken sub CO Cal' "-stantially on the line 2--2 of Figure 1 looking in the direction of the arrow; ‘ ,Figure 3 is‘a sectional view taken substantially on the line 3—3 of Figure 1 looking in the direc tion of the arrow; Figure 4 is a fragmentary sectional view taken‘, of the disks 5. These bands ‘l2, as is particularlyv illustrated in Figure 4, are of a width suf?cient to 'close'thefouter ends of the grooves or'chan ne1s16 so that the'contact of thejflanges ‘I of each of the members!) therewith is assured. ‘ "The brake shoe '8 is elongated and disposed on desired'radius so that it can be maintained in proper effective ‘position for. coaction with the 40 weighted members 9. This brake shoe 8 is ver tically disposed and the lower end portion there elevation of the structure illustrated in‘Figure 4 of is pivotally supported, as at l5, within a slot l6 disposed ‘lengthwise through an elongated with the retaining bands‘ omitted. ' As, the present invention relates solely to the beam» IT. This beam I‘! has its inner end por let-off mechanism in the accompanying »draw-~ tion ?xed, as at’ l8, to a rock shaft‘ l9.‘ This ings I have only illustrated'so much of a loom ' shaft I9'is rotatablysupported by the frame F frame as is necessary to properly set forth the‘ at a desired point in ‘advance of'the shaft 3 features of the let-off mechanism.‘ and is'disposedtransversely of the frame F. The substantially on the line 4-—4 of Figure 2; ‘ Figure 5 is a fragmentary view in outer end As disclosed in the accompanying drawings, F: shaft [9 also extends'a' desired distance inwardly denotes the frame of a loom which'may be of any‘ desired construction and which carries'in any’ desired manner a yarn beam or warp beam 13. ' Each end portion of the beam B carries a gear ’ 55;‘! ofv desiredradiuswhichis adapted to be selec of? the frame F'and said inner portion of the shaft» l9 has fixed thereto, as at 20, for rocking movement therewith an arm>2l disposed toward; the beam B; The outer or free end portion of thiséarm 2| carries a shoe 22 for contact from 2 2,135,098 above with the thread or yarn wound upon the be assembled and operated, and it will also be beam B. This shoe 22 through the action of the shoe 8 is automatically maintained in proper con obvious that my invention is susceptible of some change and modi?cation without departing from the principles and spirit thereof and for this tact with the thread or yarn on the beam B to assure the requisite tension being maintained on said yarn or thread at all times during a weaving operation. The mounting 2|] of the arm 2| upon the shaft I9 is such as to readily allow an adjust ment of the arm 2| around the shaft l9 as the 10 requirements of practice may deem advisable and necessary. The pivoted or connected ‘end portion of the arm I‘! is continued by an elongated tail arm 23 which has adjustably mounted thereon a bale 15 ancing weight or poise 24 which is maintained in reason I do not wish to be understood as limit ing myself to the precise arrangement and for mation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed. ' I claim:— 10 1. A let-off mechanism for looms comprising a rotatable member having driven connection with the rotating beam of a loom, weighted mem bers carried by said rotating member and hav desired selective adjustment through the instru ing sliding movement radially of the rotating 15 member,_ said weighted members moving out mentality of the clamping screw 25 or the like. wardly of the rotating member as said weighted Pivotally connected, as at 26, to the central portion of the shoe 8 is the outer end portion members move downwardly, and means under control of‘ the thread on the beam for holding 20 of an elongated rod 21. This rod 21 is'of a length to freely extend through the} opening 28 provided in the outer portion of the ‘arm l1. slidably mounted upon this rod 27 are the blocks 29 held to the rod 21 by the locking screws 30 25 or the like. These blocks 29 are formed to pro the weighted members inwardly of the rotating 20 member as said weighted members move down wardly. , 2. A let-off mechanism for looms comprising a rotatable member for driven connection with the beam of a loom, a rock arm positioned ad 25 vide the opposed coacting cam surfaces 3| 'so jacent to the rotatable member,>an upstanding that upon rotation of one of these blocks 29 shoe carried by said rock arm, means associated with said rock arm and coacting with the thread on the beam to allow said rock arm to swing away from the axial center of the rotating mem 30 ber as the diameter of the thread on the beam around'the rod 21 with respect to the other, ad. jus’tment may be had ‘of the tension of the coil 30 spring 34’ ‘encircling’ the rod 21 interposed be-' tween the arm ~I'l‘and the lowermost block 29. To r’otatably adjust either of these'blocks ‘29 it is ‘omy necessary to release a clamping or hold ing screw 30 and, of course, after the desired 35 adjustment ‘has been effected such screw may again be tightened. ' ‘ V I ' ‘ v The spring 34 provides means for constantly urging the shoe 8 toward the shaft 3 and within the recesses H] of the weighted members 9 as 40 such weighted members swing or move upwardly as the disks ‘5 rotate._ As these weights or mem bers 9 pass upwardly beyond the vertical center theywill swing outwardly toward the peripheries of the disks 5“ and thus provide su?icient retarda 45 tion to the rotation of the beam B to assure ' effective tension or resistance being maintained upon the thread or yarn, as drawn from said beam._ I p . . The ‘fuller the winding of the thread or yarn 50. upon thejbeam B the greater resistance must be-imposed upon the thread or yarn by the shoe 22 under the action of the ascending weighted members 9 and, therefore, upon the initial place ment of a fully wound beam, the arm 2| will 55 raise the arm I‘! to bring the shoe 8 into a po sition'to 'co'actiwith the ascending weighted mem bers 9 ‘to move the same to their innermost posi tions so that maximum tension will be imposed upon the beam. However, as the diameter of 60 the thread diminishes the arm I‘! will corre-e spondingly swing downwardly ‘and the shoe '8 outwardly from the shaft 3, thus permitting the rising weighted members 9 to assume positions further away from the shaft 3 to reduce the 65. tensioning action of the descending weighted members 9. e , The extent of downward swinging movement of the arm I‘! is limited’by contact of said arm. with the outstanding stop member 32 adjustably 70 held, as at 33, to the frame F._ From the foregoing description‘it is thought’ to be obvious that a let-oif mechanism for looms constructed (in accordance with my invention is particularly well adapted for use by reason of 75 the convenienceand facility with which itwmay diminishes, weighted members carried by the ro tatable member and free for sliding movement in ‘a direction radially of they rotatable member, said weighted members as they assume posi 35 tions away from the center of the rotatable mem ber imposing, tensionc'on the thread as pulled from the beam, said weighted members moving in such direction as they travel downwardly, and a shoe carried by the rock arm for coaction with 40 the weighted members to hold said weighted members inwardly of'the rotatable member as said weighted members move downwardly. 3. A let-off mechanism for looms comprising a rotatable member for driven connection with 45 the beam of a loom, a rock arm positioned ad jacent to the rotatable member, an upstanding shoe carried by said rock arm, means associated with said rock arm and coacting with the thread on the beam'to allow said rock arm to swing away from the axial 'center of the rotatable mem 50 ber the diameter of the thread on the beam diminishes, weighted members carried by the ro tatable member and ‘free for sliding movement in a direction radially of the rotatable member, 55 said weighted members as they assume positions away from the center of the rotatable member imposing ‘tension on the thread as pulled from the beam, said weighted members moving in such direction as they travel downwardly, a shoe car 60 ried by the rock arm 'for coaction with the weight ed members tojhold said weighted members in wardly of the rotatable member as said weighted members move downwardly, said second shoe be ing in pivotal connection with the rock arm, and 65 yielding means for resisting ‘the movement of the‘ shoe in a‘direction away from the axial center of the rotatable member. 4. A let-off mechanism’ for looms comprising a rotatable member for‘driven connection with the beam of a loom, a rock arm positioned ad J'acent to the rotatable member, an upstanding shoe carried by said rock arm, means associated with said rock arm and coacting with the thread on, the beamyto. allow said rock arm to swing 3 2,135,098 away from the axial center of the rotatable mem ber as the diameter of the thread on the beam diminishes, weighted members carried by the ro tatable member and free for sliding movement in a direction radially of the rotatable member, said weighted members as they assume positions away from the center of the rotatable member imposing tension on the thread as pulled from the beam, said weighted members moving in such 10 direction as they travel downwardly, a shoe car ried by the rock arm for coaction with the weighted members to hold said weighted mem bers inwardly of the rotatable member as said weighted members move downwardly, and a 15 counter-balance operatively carried by the rock with'said rock arm and coacting with the thread on the beam to allow said rock arm-to swing away from the axial center of the rotatable member as the diameter of the thread on the beam diminishes, weighted members carried by 5 the rotatable member and free for sliding move ment in a direction radially of the rotatable member, said weighted members as they assume positions away from the center of the rotatable member imposing tension on the thread as pulled from the beam, said weighted members moving in such direction as they travel downwardly, and a shoe carried by the rock arm for coaction with the weighted members to hold said weighted members inwardly of the rotatable member as 15 arm. said weighted members move downwardly, said 5. A let-off mechanism for looms comprising a rotatable member for driven connection with weighted members having recesses in which are received'the shoe as the weighted members move the beam of a loom, a rock arm positioned ad 20 jacent to the rotatable member, an upstanding shoe carried by said rock arm, means associated upwardly. ' WILLIAM P. BODIE. Patent No. 2,135,098 Granted November 1, 1938 WILLIAM P. BODIE The above entitled patent was extended August 21, 1951, under the pro visiuns of the act of June 30, 19.30, for 4 years and 147 days from the expiration of the original term thereof. Commissions?‘ of Patents.