US1832567A - Filling stop motion for looms - Google Patents

Description

Nov. 17, 1931. E. n. M ARTHUR FILLING STOP MOTION FOR LOOMS 3 Sheets-Sheet 1 Filed June 5, 1930 Nov. 17, 1 931. MacARTHUR 1,832,567

FILLING STOP MOTION FOR LOOMS Filed June 5, 1930 I5 Sheets-Sheet 2 EVE/V72? fZ 1///\/ E WC/fiWW/F MM+M Nov. 17, 1931. E. D. MacARTHUR 1,832,567

FILLING STOP MOTION FOR LOOMS Filed June 5, 1950 I5 Sheets-Sheet 3 FOP/V533;

Patented Nov. l7, 1931 orrice ELVIN n. MACARTHUR, or OLD HICKORY, TENNESSEE, AssIGNoR To CROMPTON a.

KNOWLES LOOM won-Ks, or wononisrnn, MASSACHUSETTS, A ooaronarron or made employ a shield normally held out of shielding position with respect to the dagger MASSACHUSETTS FILLING STGP MOTION FOR LOOMS Application filed .Tune 5, 1930. Serial No. 459,352.

This invention relates to filling stop motions of the center type for looms and it is the general object of the invention to improve motions of this type so that the loom may be i stopped if parts of the motionrbreak even though perfect picks of filling are laidby the shuttle.

Center filling stop motions as customarily but movable into shielding position prior to or at the time of starting the loom after co'rrecting a mis-pick resulting from-faulty fill- 1ng. tions attending the Completion of the picking out operation. C

hen a mis-pick occurs the weaver will reverse the pattern chain so as to cause a formation of sheds the reverseof those which preceded the occurrence of the mis-p'ickQ When each shed is formed in this'reversing operation the pick corresponding to it will be taken out and this operation will continue 4 until the defective pick is reached. Afterthe latter has been removed there remains in the next shed a perfect pick, and'with the shed open corresponding to this pick the weaver can do one of two things, either remove the pick and throw the corresponding shuttle through by hand, or leave the old pick in place and avoid handling the shuttle. In the first case the pick laid by the hand propelled shuttle would hold the filling fork raised so A that power operation of the loom could conshuttle by hand. It is quicker to follow the second method and leave the perfect pick in the fell of the cloth without handling the shuttle. 1

In this second method no filling is left v under the fork, having previously been beaten into the cloth, and it is necessary to provide some means for permitting continued operation of the loom despite the fact thatthe fork will not be supported. This is accomplished by use of the aforesaid'shield which'acts to prevent the dagger from engaging knock-off The need for the shieldis due to condi-' devices, even though unsupported by Weft, thereby permitting the loom to be turned over by power the first pick following completion of the pick-out.

In oneform of fillingstop motion the shield is held normally in raised position by a spring but is free to move by gravity to shielding position should the spring break. In other instances the shield is normally held down by gravity and is raised by a spring when the shipper shaftrocks, said latter shield, however, because of the fact that it is normally down, being ineffective to stop the loom should its spring break.

"Itis an important object of my present in ventlon to provide a shield which is capable of assuming two extreme positions, one of which is shielding andthe other of which is non-shielding and is capable also of ass'um lngan intermediate position due to defective structure and "when so placed requiring knooking-olf ofthe loom. Y

With these andother objects in view which will appear as the description proceeds, my invention resides in the combination and arrange'ment of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein a" convenient embodiment of my invention is set forth,

Fig.1 is an end elevation of a portion of the 100m having my invention applied there to, the breast beam and lay being in section,

Fig. 2 is an enlarged rear elevation taken in the direction of arrow 2, Fig. 1, V

Figs. 3 and 4 are vertical sections on lines- 33 and M, respectively, of Fig. 2,

Fig. 5 is an enlarged vertical section on line55ofF-ig.1,' f

Figs. 6, 7, 8 and 9 are operating views showing the shield and associated parts in different positions, and

Fig. 10 is a diagrammatic- "View showing the positions the shield assumes relatively to the path of the'dagger. I Q

Referring to Fig. 1, the loom frame-jhas pivoted therein a lay 21 movable about a rocker shaft 22. A bracket 23 on the lay has afilling fork'24 pivoted in the upper part thereof from which depends a rod 25. The

latter is connected to a holder 26 supporting a dagger 27 and the latter is acted upon to rise normally by a weight 28 adjustable along a rod 29 secured to the holder 26. A rod 30 moving about a fixed stud 31 eccentric with respect to the axis of the lay acts during rearward movement of the latter to press upwardly on that part of the carrier 26 behind the pivot 32 thereof so as to depress the dagger 27.

A shipper handle 33 is secured to a shipper shaft 34 rotatably mounted in the frame of the loom and connected to mechanism not shown so that when said handle is moved to the left as viewed in Fig. 1 the loom will be connected to its driving power, but when moved to the right loom stoppage will result.

A bracket is bolted to the rear of the breast beam and extends downwardly to support a stud 41 held fixed to the bracket by means of a screw 42. The bracket has spaced wings 43 in which the shaft is mounted and between which lie the shield 44 and the knockoff element 45. The latter has an arm 46 cari ried by the hub 47 and positioned to engage upper cam face 48 of a finger 49 secured to the shipper shaft 34. The knock-olf element is further provided with a notch 50 adapted for engagement with the forward end of the dagger 27. An upwardly extending finger 51 formed integral with the hub 47 engages a part of the bracket 40 to limit left han d movement of the knock-off element around stud 41 as viewed in Fig. 1. The usual means not shown may be employed to hold the shipper handle in running position, so that the finger 49 acting through its cam face 48 will hold the knock-off element in the normal position shown in full lines in Fig. 1 with the finger 51 against the bracket 40. When the knock-off element turns in clock-wise direction as viewed in Fig. 1 the arm 46 will exert a down ward pressure on the finger 49 to rock the shipper shaft 34 in a clock-wise direction as viewed in Fig. 1 to stop the loom.

The matter thus far described, except the shield, is of common construction and is substantially similar to what is known in the trade as the #8 center stop motion and shown in United States patent to Knowles No. 376,776.

My invention relates more particularly to the form and operation of the shield 44 and in carrying my invention into effect I provide the hub of said shield with a web 61 from which extends a pin or lug 62. The latter is adapted for engagement with a flat spring 63 secured by screw 64 to a holder 65 secured in fixed angular relation on the shipper shaft by screw 66. The spring is comparatively weak but is sufiiciently strong to hold the shield in either of its extreme-positions to be described.

The web has extending therefrom a shielding flange 67 which overlaps the notch 50 as shown clearly in Fig. 2, and is positioned for engagement with the dagger 27. An important part of my invention relates to the relation of the flange 67 to the notch 50 and this relation might best be understood by explaining the operation of the parts already described.

Under normal running conditions when there is no defect in the filling, the shipper handle will be in its extreme left position as viewed in Fig. 1, with the rear end of spring 63 against pin or lug 62 to hold the shield raised against gravity in position to expose notch 50, as shown in Fig. 6. As weaving continues under these conditions presence of filling under the filling fork 24 will hold the front end of dagger 27 below the notch 50 and the parts will remain in the position shown in Fig. 6.

When a fault in the weft occurs, however, the dagger will be raised to enter notch 50 so that continued forward movement of the lay will rock the knock-off element in the right hand direction around the shaft 41 as viewed in Fig. 6, thereby causing the arm 46 to move over the cam face 48 as shown in Fig. 9 and cause a movement of linger 49 downwardly. The effect of this movement will be to stop the loom.

Stoppage of the loom causes a partial rotation of the shipper shaft to lower the spring 63 out of supporting relation with respect to the stud 62, whereupon the shield will be free to drop by gravity. A subsequent rearward motion of the lay will move the dagger out of position where it may exert any restraining force on the flange 67 and the shield will then fall freely by gravity to the position shown in Fig. 7, the spring 63 still being down.

When the shield is hanging freely by gravity as shown in Fig. 7 the stud 62 is so placed with respect to the axis of shaft 41 that upward movement of the spring 63 will cause rotation of the shield in an anti-clockwise direction as viewed in Fig. 7 to move said shield to the temporary position shown in Fig. 8.

The next forward beat of the lay will find the shielding fork 24 unsupported, so that the dagger 27 moves to its up position where it would ordinarily engage the notch 50. The flange 67, however, is sufficiently high in its temporary position to engage the dagger and deflect the same until the latter has reached a point such as shown in Fig. 8. Further forward motion of the lay will turn the shield in a clockwise direction against the yielding action of spring 63 to the position shown in Fig. 6, the spring 63 being of such strength as not to exert any material turning force on the shipper shaft while the shield is being returned to normal position.

When the spring 63 slips the shield will move to its gravity held position shown in Fig. 7, and under these conditions it is desirable to stop the loom. The manner in which this is accomplished is set forth diagrammatically in Fig. 10. The dagger in its normal forward movement when weft is present will follow the path indicated by solid line 7 O which passes below the notch 50. This path also is below the flange 67 when the shield is in normal reset position as indicated in light dotted lines in Fig. 10,

but said path will cross the position occupied by the flange as shown in dot and dash lines when the shield is in its right hand extreme position preparatory to restarting the loom after a pick-out. The path, however, lies above the dagger guiding flange 67 when the shield is hanging freely by gravity, The dagger upon striking the top of the flange will be prevented from moving along the normal path to clear the notch 50, and will be raised along the heavy dotted line to engage said notch and rock the knock-off element to effect loom stoppage. The heavy dashes indicate the path followed by the dagger when weft is absent from the shed.

From a consideration of Fig. 10 it will be understood that the shield assumes two extreme positions, the left hand being normal and the right hand being temporary, both of these positions being maintained by'the spring 63, and that said shield is capable of assuming an intermediate third position by the action of gravity where the flange will be so located as to require an upward deflection of thedagger 27 into stopping relation with respect to the notch 50.

From the foregoing it will be seen that I have provided a simple means for effecting loom stoppage if for any reason the shield is in abnormal gravity held position due to the fact that the shield when in such position requires the dagger to stop the loom, even though weft be present under fork 24. It will also be seen that the device disclosed herein operates to stop the loom as soon as any defect occurs in the yielding device which holds the shield in normal position.

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

1. In a filling stop motion for a loom hav ing a lay, a dagger on the lay, a knock-oif element to effect loom stoppage, a shield for the element, means to hold the shield in either normal shielding or temporary nonshielding position relatively to. the element, said shield tending to move to a position 1ntermediate its said shielding and non-shield ing positions, and a dagger guide on said shield positioned when the shield is in intermediate position to engage the dagger and guide the latter into coacting relation with.

the knock-oh element to stop the 160111.:

2. In a filling stop motion for a loom hav-i ing a lay, :a dagger oaths-lay, a. knock-off: element to effect loom stop-page, a shield for the element, said shield being movable from normal non-shielding position through an intermediate position to temporary shielding position, means to hold the shield in either non shielding or shielding position, i said shield being acted on by a force independent of the means to hold said shield in intermediate position, and a dagger guide on the shield, the guide and dagger being so related that when the sheld is in. intermediate positionsaid guidewill cause coaction of the dagger and element to stop the loom.

3. In a filling stop motion for a loom having a lay, a dagger on the lay, a knock-off element to effect loom stoppage, a shield for the element, yielding means to hold the shield in either of two extreme positions, said shield ten-ding by gravity to assume a position of rest between said extreme positions, and a guide on the shield positioned when held at rest by gravity to engage the dagger and cause the same to engage a knock-off element to stop the loom.

4. In a filling stop motion for a loom having a lay, a weft control dagger carried by the lay and moving through a prescribed path when weft is present, a knock-off element to efiect loom stoppage positioned for cooperation with the dagger when Weft is absent, and a shield for said knock-off element, said shield capable of assuming three positions relatively to the path, the normal v non-shielding position being on that side of the path'on which the knock-off element is located,the temporary shielding position being across the path to deflect the dagger from engagement with the knock-off element, and the third position intermediate the first two positions located on that side of the path opposite the knock-0E element, the shield when in said third position engaging the dagger to cause the same to move into operative relation with respect to the knock-off element to stop the loom.

5. In a filling stop motion for a loom having a lay, a weft controlled dagger on the lay, a knock-off element to cooperate with the dagger and effect loom stoppage, said daggernormally moving along a path when weft is present which is to one side of the knock-off element, a shield capable of assuming three positions of rest relatively to the path, and yielding means to hold said shield either normally on the same side of the path as the knock-off element is located or temporarily across said path, said shield falling by gravity when the yielding means falls to a position below said path, the shield thereby being positioned to engage the dag ger and cause the same to cooperate with the knock-off element to stop the loom;

6. In a filling stop motion for a loom having a lay, a weft controlled dagger on the lay, a knock-off element to coact with the dagger to effect loom stoppage, and a shield for said dagger to assume two positions relatively to the knock-oil element in neither of which the dagger coacts with the knock-oil element when weft is present, and means rendered effective by the shield when the latter is in a third position between said two positions to cause coaction between the dagger and element to stop the loom when weft is present.

In testimony whereof I have hereunto affixed my signature.

ELVIN D. MAGARTHUR.

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