US1633653A - Filling stop motion for looms - Google Patents

Description

June 28,1927. 1,633,653

W. H. WAKEFIELD FILLING STOP MOTION FOR LOOMS Fild Dec. 14. 1925 Patented June 28,1927.

UNETED STATES PATENT oFricE.

WALTER H. WAKEFIELD, OF woRoEsTER, MASSACHUSETTS, ASSIGNOR OoROMPTON & KNOWLES LOOM WoRKs, or woRoEsTER, MASS CHUSET S, A ooRroRATIoN OF MASSACHUSETTS.

RiLLiNG s or MOTION EoR LOOMS.

Application filed December 14, 1925. Serial No. 75,183.

This invention relates to filling stop motions for looms and it is the general object of the invention to simplify the center stop motion of the well known Knowles loom to the end that the same may be operative with fewer parts without sacrificing reliability of operation. i r j When the filling breaks or becomes exhausted during the weaving process a short end is likely to remain in the shed which when beaten up leaves a thin place in the fabric. If the broken end is long enough to support the filling fork and the shuttles change on the next pick, weaving may continue, but ultimately the shuttle with defective filling will again become active and will stop the loom through the action of the stop motion. The weaver must then remove all the picks laid after the short pick was beaten up and must also remove the defective pick.- This leaves the shed of the loom in the position it was on the pick before the passage of the shuttle which laid the faulty pick but of course the pick which was laid in that shed when the latter was originally open has already been beaten in place and for that reason is not behind and under the filling fork. Therefore as the lay moves forwardly the fork of the stop motion will be unsupported and would stop the loom unless provision were made to prevent stopping and permit continued running.

As heretofore constructed stop motions of the type referred to have been provided with a sheet steel shield which when the loom stops is always raised to such a position as will hold the dagger of the stop motion out of contact with the actuating lever which is rocked by the dagger to effect stopping of the loom. Because of this shield it is possible to start up the loom when no filling is in I theshed, the first forward movement of the lay after pick-out resulting in moving'the shield down out'of shielding position so that on the next and subsequent forward movements the actuating lever will be exposed to the action ofthe daggershould filling be absent.

It is an important object invention j to dispense with the shield and resetting lever therefor i but retain the function of these parts, permitting the loom. to run for the first pickeven though no filling be inthe shed; The mechanism comprises generally an actuating lever which is moved toinitial position when the loom stops and is moved to normal running position on the first pick of the loom. Provision is made to hold the actuating lever yieldingly in normal position by connections from the shipper mechanism when the loom is running and torelease the actuating lever so it can return to initial position by the same connections when the loom is stopped. In order to prevent the dagger from constantly striking the actuating levcr when the latter is in normal po si tion said lever has the end thereof below the path usually traversed by the dagger when weft is present.

lVith these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein I have shown a convenient embodiment of my invention, l

Fig. 1 is a transverse section through a portion of a loom showing my invention applied thereto with the stop motion in the position it assumes when the loom is being started up immediately after a pick-out with the lay advancing, the actuating lever being second or normal position,

Fig. '3 is a view similar to Fig. 1 but showing the parts on a subsequent pick when filling is absent and the actuating lever is being moved from normal to knocking ofl 'positlon,

Fig. l 1s a top planview of the parts in the position shown in Fig. 2 looking in the directionof' arrow 4 of said figure,

Fig. 5 is a rear detail elevation looking in the direction of arrow 5, Fig. 1,

Fig. :6 is a vertical detail section on line 6-6 of Fig. 2, and

, Fig.7 is a diagrammatioview on an en- 1 larged scale showing'the paths followed by the dagger on the lay under Various con 'ditions.

Referring; to the drawings it will be seen thatl have provideda loom side lO'having a; breast be 8.1 11111; to the rear faceof which is secured a' bracket 12 having a rearwardly extending arm 13 and a depending. arm 14. Said arm 13 has secured thereto a cam plate 15 having a forwardly and downwardly ex- 7 tending cam face 16 to guide a dagger 17.

Said dagger is secured in the forward end of a lever 18 pivoted as at 19 to a bracket secured to the under sideof the lay 21. A link 22 pivotally connected to the lever 18 extends upwardly and is attached to an arm 23 formed on a stub shaft 21 which extends through a small bracket 25 carried on the forward face of the lay 21. A small block 26 moves with the arm 23 and shaft 2 1- and has secured thereto filling fork tines 27 which are positioned to enter a slot S in the lay 21.

-. A shipper shaft 28 journaled in the loom actuating lever is moved to the left from the position shown in Fig. 1 knock-elf lever 31 will be depressed to rock shipper-shaft 28. A collar 36 is secured to the stud 32 and receives one end of a coiled torsion spring 37 the other end of which is received by the hub 33 to hold the lever 34 yieldingly to the right in the position shown in Fig. 1. The matter thus far described is of well known construction and forms no part of my present invention. 7

In carrying out my present improvements 1 provide means for moving the actuating lever from an initial to a normal position on the firs pick after. a pick-out and provide also for retaining the lever in its normal position by means of a latch which moves with the shipper shaft. Referring particularly to Figs. 1, 2, and 3 it will be seen thatl have provided the actuating lever 3% with a notch 50 which is always in advance of the cam face 16 and-have further provided said actuating lever with a second notch 51 which when the lever is in inltial position shown in Fig. 1 will lie behind the cam face 16 and be held against alug 52 rigid with the arm 13 by spring 37 As shown in Figs. 4 and 5 I provide the lever 34- with a laterally extending lug 53 having an extended lower face 55%. A flat spring or latch 55 has a slot 56in the forward end thereof through which passes a screw or bolt 57 threaded into a flattened portion of hub to hold said latch against. the hub and cause these parts to move together. The rear end of spring or latch 55 is formed with a tooth or hook 58 proportioned to engage the rear end of lug 53 and normally lying over the axis of sttid 32 so that any pressure exerted thereby against lever 3% will be radial with respect to torsion spring 37. A cam 60 extends upwardly from arm 13 for a purpose to be described. with a set screw 59 which normally-lies over the leaf spring or latch 55 to move said latch down positively away from lug 53 when the shipper handle moves to stop the loom.

In operation, after the loom v has been stopped, the parts will be in the initialposition shown in Fig. 1 with the rear notch 51 of the actuating lever held againstlug 52 slot S. thus permitting the dagger to descend until it engages actuating lever 34. Asthe lay 21 continues to advance the dagger will enter notch and move the actuating lever from the position shown in Fig. 1 v to the po sition shown in Fig. 2. Thelatch was raised when the shipper handle, was pulled on to start the loom and as lever 34 is moved to the position shown in Fig. 2the hook 58 will rise behind lug 53 to hold the actuating leverin the normal position shown in Fig. 2. Continued forward movement of thelay will cause the dagger .to rise on the rear face of cam 60 to be lifted out of notch 50, and the dagger will move forwardly to the end of its motionwithout further action on the stop motion. Notch 51 is now in front of cam face 16 and above arm 13 but below the path usually traversed by the dagger and indicated by the dotted line U in F 7. On all succeeding advancing movements of the lay, when weft is present, the dagger 17 will be held in raised position following the path indicated atU and will pass over the notches 50 and 51 without engaging the same.

When filling is absent, however, the dagger 17 will be lowered to engage the rear notch 51 to give the actuating lever a second that as soonas dagger 17 leaves notch 51' spring 37 will, befree to return the actuating lever to the initial position shown in Fig. 1.

The lever 31 is provided In this way lever 3 lis returned to initial position every time the shipper shaft moves to stopping position.

It will be seen that the actuating lever 34:

accomplish this result the notch is high enough to extend above the path normally traversed by the dagger when filling is present and lever 34: is in the initial positlon. On the first pick with filling present therefore, the dagger will engage notch 50 and move with the same about stud 32 along a path similar to the dot and dash line M in Fig. 7 to a point below the dotted line U of Fig. 7 before being disengaged by cam 60. As in the previous instance, therefore, the notch 50 will be below the normal path of'the dager. D From the foregoing it will'be seen that I have provided a filling stop motion with an actuating lever movable from initial to normal position on the first pick after a pickout and that theactuating lever is movable from normal to knock-off position upon a subsequent absence of filling. It will further be seen that the latch for holding the lever in normal position moves to releasing position when the shipper handle is thrown off, thus permitting the actuating lever to be restored to initial position. Furthermore, the tooth of the latch moves in a direction substantially radial from the axis of stud 32 so as to have little or no effect on the action of torsion spring 37. Also, that portion of the actuating lever which is engaged by the dagger when said lever moves from initial to normal position is held by latch in a position below the normal path of the dagger so as to be out of the path of said dagger. I

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departingfrom the spirit and scope of the invention, and I do not wish to be limited to the details herein disclosed but lVhat I claim is:

1. In a. filling stop motion for looms, a shipper shaft, a movable actuating member having a pair of operating faces, a dagger movable back and forth in the loom and controlled as to its position by weft, means to shield one of said faces from the dagger when the actuating member is in initial position, means moving with the shipper shaft to hold the actuating member locked when the other face of the actuating member is in operative position with respect to the dagger, and connections to effect angular movement of the shipper shaft to stop the loom when the dagger engages said other operative face of the actuating member,'the locking means moving with the shipper shaft out of locking position with respect to the actuating member when the shipper shaft moves to stop the loom.

2. In a filling stopmotion for looms,.-a

= lay, a shipper shaft, a bracket held in fixed position, an actuating lever pivoted to the bracket, a dagger on the lay and controlled as to position by the weft, a cam face on which the dagger moves as the lay advances, an operating face on the actuating lever held out of the path of the dagger when said actuating lever is in its initial position, a second operating face formed .on the actuating lever in advance of the first named face and positioned for engagement with the dagger when weft is present, a lock moving with the shipper shaft to hold the actuating lever in normal position with the first named operating face in advance of the cam face after engagement of the dagger and second named operating face, the lock moving angularly with the shipper shaft away from the actuating lever to release the same when the shipper shaft is moved to stopping position.

3. In a filling stop motion for looms, a lay, a member movable back and forth with the lay and controlled as to position by the weft and normally traversing aprescribed path when weft is present, shipper mechanism, an actuator for the shipper mechanism having two portions to be engaged by the member, one of said portions extending above the prescribed path of the member and movable by the latter to a position below the prescribed path, and the other of said portions lying below the prescribed path to be engaged by the member whereby said member will move the actuator when weft is absent.

4. In a filling stop-motion for looms, a-

lay, a member carried by the lay and normally traversing a prescribed path when weft is present and moving through a second path when weft is absent, shipper mechanism, an actuator for the shipper mechanism having two portions one'of which lies above the normal prescribed path to be engaged by the member when weft is present and move to a position below the normal pre inn scribed path, means controlled by the shipper mechanism to hold the actuator with the said portion below the prescribed path and the second portion of the actuator above the second named path to be engaged by the member when weft is absent to move the actuator tocontrol the shipper mechanism.

5. In a filling stop motion for looms, a lay, a member movable on and moving therewith and normally traversing a prescribed path when weft is present and moving through a second path when weft is absent, shipper mechanism, an actuator for the shipper mechanism to assume three positions in one of which a portion of the actuator extends above the normally traversed path of the member when weit't is present to be engaged by the member and moved-to a second position, said actuator when in the second position having another portion below the normally traversed path of the member but above the second named path to be engaged by the member when weft is absent, and moved to the third position into engagement with the shipper mechanism to stop the loom.

6. In a filling stop'motion forlooms, a lay, a member carried thereby and controlled as to position by the weft and'normally traversing a prescribed'path when weft is present, 'an actuator extending 1nt0 the prescribed path, shipper mechanism to tion by the member, and acam to be engaged by the member as the latter continues to move to restore said member to the prescribed path.

In testimony whereof I have hereunto afiixedmy signature.

WALTER n. WAKEFIELD.

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