US1769402A - Protector mechanism for looms - Google Patents

Description

July 1,1930. 4 K. J. UNWINv 1,769,402

PROTECTOR MCHANISM FOR LOOMS Filed April l0I 1928 17H/mw Y [n/762% :fm1/wb Patented v,July 1v, `193() *,"IUNITE D .s

Kniviviaxink .'r.. UNWIN, orWORCESTER.'MASSACHUSETTS, Assieitoii. 'rooiaoiviriona xivoWLnsf Looiviwoitns, or WonciiSrna, nASsAcHUSnTmsf-A CORPORATION oF- .n

MASSACHUSETTS H y Application .filed hpi'il 1'0,

This invention relates to improvements in v protectormechanism vfor looms and itis the general object of the invention tov provide a simple device which will hold lthe Adetector finger resiliently against the shuttle binder when the shuttle is boxed and operate to re'- move the binderlinger pressure when the shuttle is beingv picked.- f Y In the usual loom employing aifiy shuttlev the picking mechanism l operates to-.propel the shuttle when the lay has reached approXr mately its mid position on its backward stroke. K.

As ordinarily constructed the protector mechanismhas a binder Iingerwhich is held'under spring tension against the shuttle binder at all times. It is animportant object of `my resent invention to provide a Spring which Y will hold the finger against the binder during berequired to move the shuttle.

lals

a portion of the cycle of the pick ofI theloom but eective to remove the spring pressureat the time ofV pickingso lthat less power will A shuttle will usually enter itsshuttle boX when the lay is approximately at its mid point when moving/forwardly .and itis therefore necessary at' this i time 4to have vthe protector.

moves to disable the spring during the'baclzward movement ofthe lay, butto permitthe same to be operative with respect tol the protector finger on theforward movement of .thelay so that protection'may take place in the usual manner.

It is ,a more particular'object `of* my present invention 'to providea springplunger surrounded by'acompresson spring, the Vplunger to operate prior :to boxing of the shuttle Yto exert pressure against thebinder 'bythefprotector finger, and Said plungerbeing removed by the Connection with the crank to ylessen or ventirely remove pressure againstthe binder y PROTECTOR-ivinciinnisivrnoitiiooivis- 1923.4 Serial no. 268,941. .j

dll@ 0 the PiOtector ingeriwhenthe layV is( picking position.l f

f i ,With these and other objects view will,` appear as the description proceeds, myr invention resides in the combination and arrangement of parts hereinaften described Vand set forth in'the'claims. f. V n In ythe accompanying drawings, Awherein I' have shown a convenient embodiment of my invention, p y A, Y F ig. 1 is a front elevation of a portion of a lay having myinvention applied thereto,

F ig. 2 is a vertical section on line 2-2 of Eig. '3 is a view similar to Fig. Q'vviththe breast beam and loom parts omitted and with vl" ig. 1 showing arportion ofthe breast beam y in section and showing the lay in the position it assumesy when moving forwardly, and r the lay and 1 associated parts kmoving rear-V wardly or'towardpicliing position.

'Referring to thedrawingshave shown a loom frame lOhaving a breast beamfll von whichmay be mounted'knock-o' mechanism 12. Said mechanism may cooperate with a daggerl carried on aprotector rodlt which Vis oscillatable in a bracket 15 secured toi the i2-Lyle. ,Theiay may @@SuniwftedbySword-5k Y i i one of which is indicated at 17, and mayhave a pair of shuttle boXes 18 which rise andfall lso that first one` and thenthe other of the shuttles S is moved into active vposition with respect to the race plate 19 on the lay. Each y shuttle b oX is provided with a binder Q0 which f is movedoutwardly or toward the breast beam bythe-shuttles when they ,are boxed. The binder corresponding to the active shuttley is adapted for cooperation with a protector finger 21`which is securedr to tlie,pr0. tectorrod 14 in'fixed angular relationwith of which there are two, have connection as at Y such as the top kor crank shaft of the loom'not shown to move the lay backwardly and for'- wardly awayffrom and toward thebreast beam 11. y. l .y

Innormal operationthe shuttle which is shown when the lay is moving backwardly with the'lay and are driven. by any means;-

respect to they dagger 13; Connector rods 22, 9.0 i I and in the position shown in Fig. 2, andV Aeffect of which is to depress the' dagger 13 so that the same will inovevforwardly without engagement of .the knock-Ev mechanism 12. Should the shuttle fail to be boxed, however, the binder corresponding to the active shuttle box will not be moved forwardly and the fin- V ger and dagger will assume the position shown in dotted linesA in Fig.2, the dagger engaging'the knock-oft1 device 12 to effect immediate stoppage of the loom to prevent breakage of the-warp threads; The mechamsmV thus for described 1s of common construction and forms no part of myfpres'ent invention.`

In carrying my improvements into eect -I provide means whereby the binder finger 21 will'be moved yieldingly toward the shutf tle binder corresponding to the active shuttle during the forwardymovernent of-the lay and I provide further forv moving the protector finger away from the binder during the backward stroke of the lay. This result I achieve by providing a depending arm having a hub31 which is held infixed but adjustable angular position on the protector rod 14 by a'set screw 32. Pivotally connected to said. arm at the lower end thereof 'as at 33 isa rearwardly extending spring rod or plunger 34 having 'on the forward end there- Aof a collar 35 which is adjustable'alongthe rod and is retained in adjusted position by setscrew 36.

Surrounding the rear portion vof the rod.

behind the collar 35 is a compression spring 37, the rear end of which engages a clip 38 secured to the underside of the connector rod 22 by` means of bolts 39. The plunger 34 eX- f tends through 'an-'opening 40 in the clip and has the rear end thereof threaded as at 41 to receive a pair of nuts 42 adjustable along the rod and acting to engage the rear surface of the clip 38 to limit forward movement of the plunger 34 under action of the spring 37.

In operation, it will be understood that the connector 22 will assume two angulaipositions with respect to the lay when the latter is substantially midway betweenits extreme forward and backward positions-and that said connector will be inclined downwardly and rearwardly as indicated in Fig'. '2 when the lay is moved forwardly as suggested vby arrow A, Fig. 2, and that said connector will be inclined upwardly and rearwardly when the lay is moving rearwardly as suggested by arrow B in Fig. 3. The .connector rod will ordinarily move 1n a vertical plane which is perpendicular to the lay. ihe depending portion of the clip 38 will therefore bein two'different angular positions when the lay is in its mid position, depending upon the direction of movement of the lay.' When the lay is advancing the clip will be in the relatively forward 1position to compress spring'37Y and through, the'l latter urgelthe protector finger 21 against the shuttle binder corresponding to the active shuttle. `The linger is therefore held at this timein position to beV controlled by ftherbinder' so that: the dagger may receive its normal movementaway from the knock-off device 12 if theshuttle is properly'boXed. Y Y,

On thebackwardstroke of the lay, however, the clip 38 will be moving relatively rearwardly as indicated in 3 and will engage the nuts 42Y so as to move the arm 3() rearwardly and Vthereby rock the protector rod 14 in a clockwise direction as viewed in Fig. 3 tornove the protector finger 21 out of engagement with the binder corresponding to the active shuttle. Y The latterV may therefore be picked with less power than would be the Y Y case if the ypressure of spring' 37were permitted to bearvagainst the shuttle.- By varying theY position of the nuts 42 along the rear end of theplunger or rod 34 the time and also the degree of movement of the protector'V linger21 may bechanged,V l

From the foregoing it will beseen that I have provideda verysiinple means forv per- Ymitting aspring to exertv its pressure against a protector linger during theboXing of lthe shuttle to permit the usual protecting voperation, and that :said binder finger is moved to pressure relieving position yat the time of picking. It will also be seen; thattheparts operate with the use of a single spring which at times is ineffective to exertpressure onthe binder finger and at other times is compressed .by the clip 38 to exert pressure against the binder. -By the arrangement set forth herein I find it'unnecessaryftoV employ the dilficultly replaceable usual torsion spring 4custornaril placed aroundV the protector rod 14. Y

lHaving thus'described my invention it will be apparent that changesand modifications may be made therein by those vskilled in the art without departing from theA spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: n V

1. In protector mechanism for a loom having a lay to move backwardly and forwardly and a shuttle normallyto be boxed when the l lay is moving `in one .direction andV to be picked when the lay is moving in the. other direction, a lay driving crank connector mov-y able'relativelyto the lay in a plane substantially perpendicularto the lay, said connector moving in one direction relatively to the lay immediately prior-to boxing ofythe'shuttle and movable in another direction relatively to the lay immediately prior to picking, aprotector finger capable of resisting-movement of the shuttle, a depending arm fixedr with respect to the protector finger and movable with-the latter, a rod pivotally connected to said depending arm and extending rearwardly, a spring surrounding said rod, and supporting meansfor` the rear yend of the rod through which the latter extends, said supporting means being carried by thecrank connector and effective when theshuttle is being boxed to compress the spring and effective when the shuttle is being picked to move the rod vto move the finger to vshuttlerrelievi'ng 'iii position. Y

2. In protector mechanismfor a loom having aV lay to move backwardly land forwardly and a shuttle normally to be boxed when the lay is moving in one direction and to be picked when the lay is moving in the other x direction, a lay driving crank connector movable relatively to the lay in a plane substan-A tially perpendicular to lthe lay, said connector moving in one direction relatively to the lay immediately prior to boxing ofthe shuttle and movable in another direction relatively to the layimmediately prior to picking, a protector finger capable of resisting movement of the shuttle, a rod operatively connected to the finger and movable with the latter, a spring surrounding the rod, and 5; springengaglng means carried bythe crank connector, said meanseffectivel when the shuttle is being boxed to engage the spring and throughthe latter transmit yielding pressure to the finger to resist movement of the shuttle, and said means movable when the Y shuttle vis being picked to engage the rod 'to relievethe pressure of the spring and there` by diminish the resistance offered by the protector nger to the movement of the shuttle.

3. In protector mechanism for a loom having a lay to move backwardlyand forwardly and a shuttle normally to be boxed when theV lay is moving in one direction and to be picked when the lay is moving in the othery 1 direction, a lay driving crank connector `movable relatively'to the lay -in a plane substantially perpendicular to the lay, said connecing, a protector finger capable of resisting n tor moving in one direction relatively to the lay immediately prior to boxing of the shuttle and movable in another direction relatively to the lay immediately prior to pickmovement ofthe shuttle, a depending arm movable in fixed angular relation with respect to the protector'finger, a rearwardly extending rod pivotally connected to said arm, va spring surroundingsaid rod, supporting means for the rear-end of the rod carried by moving the protector'inger to a position to t relieve resistance to the motion of the shuttle when the latter'is being picked,` i y 4:. In protector mechanism for a loom having a lay to move backwardly and forwardly v anda shuttle normallyy to be boxed 'when the lay is moving inone direction and to be picked when the lay is moving in the other direction,

la lay driving crank connector movable Vrelai tively to the'lay in a plane substantially perpendicular to the lay, said connector moving ,l

in one direction relatively to the lay immediately prior to boxing ofthe shuttle and movable in another direction relatively tothe lay immediately prior to picking, a protector finger capable Vof resisting movement of the shuttle, a dependingarm movable in fixed any gular relation with the detector finger, a rearwardly extending rod pivotally connected-to the latter, said supporting Ameans' compressing the springto increase the resistance which Y the protector finger offers to the movement of the shuttle when the latter is being boxed, and said supporting means engaging the member therebehind on the rod to move said detector shuttle is being picked. f

rnger to shuttle relieving position whenthe fixed my signature. c VKENNETH UNWIN.

In testimony whereof 'I have hereunto af- Y c the crank connector and movable with the latter, said supporting means lengaging the spring to compress the latter to cause the same to exert yielding pressure ragainst the binder finger when the shuttle is beingvboxed,

and said supporting means positively engaging and withdrawing the rod and thereby

Images