US2161727A - Weft feeler mechanism for looms - Google Patents

Description

June 6,` 1939. z. soCHOR wEFT FEELER MECHANISM FOR Looms Filed Jan. 29, 1957 IN VEN T0 R. Zdezeif Soc/1207;

ATTOFFNK Patented June 6, 1939 UNITED STATES 2,161,727 WEFT FEEDER lVIEGHANISM FOR LOOMS Zdenk Sochor, Dvur Kralove n. L., Czechoslovakia Application January 29, 1937, Serial No. 123,079 In Czechoslovakia January 29, 1936 3 Claims.

This invention relates to weft feeler mechanism for looms, and it consists in the constructions, arrangements and combinations herein described and claimed.

Preferably shuttle or bobbin changing for weft replenishing in looms, requires a feeler mechanism for bringing the shuttle or bobbin changing motion into action when the weft in the shuttle is exhausted. Such feeler mechanism should be of a character not likely to damage the weft by mechanical, electrical or other action and should be of simple construction, reliable, and require only a minimum of attention.

Many of the feeler mechanisms in use are of such construction that the feeler device is constantly in motion and the feeler actually collides with or encounters the weft in thev shuttle at every beat-up of the sley. When the weft is nearly exhausted, then the feeler device remains stationary during the beat-up and this condition brings about the automatic shuttle or bobbin change.

Thus a more or less complicated movement of mechanical parts involving some weight occurs,

about 700 times and initiated by mechanical encounter with the easily damaged weft, theV change as stated being commonly brought about by non-movement of feeler mechanism.

A considerable number of feeler mechanisms act in such a Way that the weft is felt by the actual feeler entering into the shuttle box at a height coinciding with the longitudinal centre of the shuttle in the shuttle box. vSuch a construction of feeler mechanism is not well suited for certain automatic looms of the drop-box type where the weft requires to be felt in the shuttle box at the plain end of the loom.

The movement of the feeler mechanism during ordinary running of the loom is so slight as to be hardly noticeable, and such movement is restricted by a lever or the actual feeler mounted on the mechanism proper. Only once in approximately 700 beat-ups of the loom does the whole feeler mechanism move, that is, when an automatic change of shuttle or bobbin is required. Accordingly, damage to delicate weft is prevented and wear and tear on the feeler mechanism is minimized.

A feeler mechanism according to the invention can'be safely used in cases where a length of weft is present between the shuttle and the Wall of the shuttle box, because the actual feeler does not operate at a level coinciding with the longitudinal center of the shuttle in the shuttle box, but above or below that level and preferably above.

The whole feeler contrivance is mechanically very simple and no auxiliary source of energy such as electricity is necessary. Also, the movement of the actual feeler during weaving only amounts to the swing of the end of said feeler through an arc 5 of a fraction of an inch and so possibility of damage to the weft is reduced.

The feeler is set or regulated to act at the moment when the weft on the bobbin is sufliciently exhausted and according to requirements 10 of the particular type of loom.

The feeler contrivance consists of a small smoothly shaped pivoted lever and its sliding support, springs, etc. and is mechanically very simple, which is an advantage for the Working conditions r15 of a weaving shed.

The invention is illustrated by way of example in the accompanying drawing, wherein Figure 1 is a view o'f the weft feeler mechanism partly in section with the sley in forward position. Y 20 Figure 2 shows a plan View of Figure l.

Figure 3 is a back view of the mechanism shown in Fig. 2.

Figure 4 is a view similar to Figure 1', but with the actual weft feeler down following exhaustion 25 of weft.

The cop bobbin 2 with its wound-on weft engages the skewer of the shuttle in such a way that a cut-out cavity I in the base or butt of the said bobbin presents a horizontal face and an upright 30 abutment as shown in Figures l and 2. The position of the horizontal face is assured by reason of a pin 34 on the skewer of the shuttle engaging a horizontal bore or cavity 3 in the base or butt of the bobbin. The front wall of the shuttle 33 is 35 provided with an entrance slot 32 opposite the cut-out cavity I at the base of the cop bobbin.

The feeler contrivance is mounted to the fixed framing of the loom in front of the breast beam by means of a support I8. An adjustable bracket 40 I5 is xed to the support I8 by screws I1. The supporting structure I3 for the feeler contrivance is adjustably fixed to the bracket I5 by screw I4 and can be adjusted horizontally nearer or further relatively to the front end portion of the sley. A 45 slide Ill is movable in a square guide sleeve I2, and this slide I0 is pressed towards the front wall of the sleeve I2 by means of a spiral spring II or equivalent means. The forward movement ofl slide I0 is limited by a split pin I6. I'he sleeve I2 50 has a slot in the base for a cam 9 which projects downwardly from the slide structure I0. A crank rod 6 which is attached to the slide structure I0 is provided with a shaft upon which the actual feeler 5 is pivoted. This feeler 5 by reason of its 55 weight or under the influence of a spring V"l, tends Vto assume a horizontal' position as indicated in Figure4. A rearward extension of the feeler rests against a stop 8.

A lever 24 is provided adjustably supported in a. drum 22, which is accomplished by passing the lower free end of the lever through an aperture formed in the drum, the lever being secured in Vthe aperture by a. set screw 23. Y'I'he aperture receiving the lever V24 is off center, and a lever 25 is Vsimilarly secured upon the drum 22. The drum f 22 is oscillatably mounted upon an axle 20 carried;

Y by a depending arm I9 of the bracket I5aspring .Y quired during Weaving.

2| secured upon the axle 20 andhaving an end inY engagement with the lever 25 tends to hold'the cam 9 in engagement 'with the lever 24 Yasre- The lever 25 extends in a direction opposite the lever 24 and terminates in an'angularly disj-V posed stud upon which there is revolubly mounted a roller 26adapted jto engageV and'press a lever 2,1 into engagement with'a pin 29 carried jby a weft fork Vhammer 30. 'The lever 27 has a tooth 28 adapted tobe engaged by the pin 29 Vimparting a movement to the shaft 2l corresponding to the movement of the hammer. This Ymovement starts the automatic shuttle or bobbin change. Y f The mechanism acts in the following way:

When the sley isV drawn up or in its forward position,feeler lever 5 projects into the shuttle Y above nthe line of the horizontal axis of the bobf 'las ' out cavity I. @As a consequence, when the sley bin and is Vslightly forward or over the longitudinal center'of the shuttle when the sley is fully Vup to the breast beam (see Fig. 1), this being possible because the front wall of the shuttle box Ais provided with a slot for the purpose, as is the front Wall of the shuttle.V T he disposition oi'feeler lever 5 is so adjusted that it doesV not pass wholly above the bobbinbut its forward end encounters the wrapped-unweit and so the feeler lever 5 is gently deflected into an inclined yposition and rests or is supported on the weft, bridging the cut-out cavity I at the base or buttoi the bobbin when the sley is in its extreme Yforwardr position Y(seeV Fig. 1),. When the Vsley moves back, the YVfeeler 5 returns to its normal horizontal position.

f When thevweft on the bobbin is exhausted, there isY nothing to direct and keep feeler Y5 deilected and so it encounters the vertical wall of the cutnext moves forward, the slideV I0, in connection Y with which the feeler 5, is pushed back Vagainst the action of spring II. 'I'he result is, thecame 9 on the slide I0 is pushed backV nearer to the fixed framing, Yreleasing the arm 24 Yby theY protruding cam 9 of the slide I0 and changes from the position seen in Figure 1 to the position seen in Fig ure Alpunder action of the spring 2l. f Asr a ,result of this, the second lever arm '25 with anti-friction roller 26 moves to its lower position shown in dotted lines, Fig. 3, thus effectingY connection of i' l With the cam.

lever 21 with the weft fork hammer 3U thereby bringing about the desired automatic shuttle or bobbin change. At the proper time, lever 25 is lifted by the aid of a projection on lever 21 whereupon the slide I0 with protruding horn 9 returns 5 into the original position as shown in Figure 1, and lever arm 24 is reset. i

I claim: Y Y

l. A mechanical weft .feeler mechanism for looms comprising a sley, a cop bobbin'having a 10 cavity in the form of a tangential notch, the longer side of which is in a substantially horizontal plane, the loom-having a breast beam, a

-slide member supported by the breast beam, a

spring-urged feeler element carried by the slide, 15

movable into the tangential notch upon exhaustion Vof the weft, whereby said slide will partake offorward movementsl of the sley thereby'actuating `mechanism for effecting change of the Vcop bobbin. 5 Y I 2. Mechanical weit feeler mechanism for looms 'comprising a sley, a shuttle, a `cop bobbin therein 135 having a tangential notch, the longer side 'of which is disposed in a substantially horizontal plane, the loom having abreast beam,`a sleeve Xed tothe beam, a slide Within the sleeve, spring meansurging the slide in the direction of the sito sley, a spring-urged feeler elementl carriedby the slide, the free end of the feeler element being'in tangential contact with the Wefton the bobbin and mcvableinto the tangential notch upon exhaustion of the weft, whereby the slide will pari3 take of Vforward movement of the sley, cop change Vmechanism including a weft fork-hammer, a shaft actuated thereby, a pair 4ofrlhingedly connected levers, one of said levers being positioned in prox-V imity to the shaft,ftheot`her of said levers being 90 disposed beneath the slide, a'cam on the slide normallyl contacting the last named lever, and spring means connected`between the lever'surging the last named lever into bearing Vcontact 3. A mechanical weftY feeler mechanism `for looms comprising a sley, arvshuttle, a cop bobbin therein having Yan angular tangentialcavity, a

ffeeler element comprising a pivoted leverprojected through the shuttle intheV direction of theo warp, the feeler element contacting the weft tangentially above the longitudinal '-axis' of the shuttle and being of 'a character to be deflected so long as the weft supply remains and upon exhaustion ofthe weft supply, said lever being of a" character capable of automatic deflection and movable to a substantially 'horizontal position to engage the cavity of the cop'bobbin, whereby the ife'elerwill partakeof forwardv movement of the sley to actuate cooperating mechanism" for efect-V 60 ing the cop.change.

ZDENK soCHoR.

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