US1568036A - Shuttle-drive arrangement - Google Patents

Description

Dec. 29, 1925- F. SOUCZEK SHUTTLE DRIVE ARRANGEMENT 2 Sheets-Sheet 1 Filed June 25, 1924 INVENTOR F.90VCZQA Dec. 25, 1925- F. SOUCZEK SHUTTLE DRI'VE ARRANGEMENT Filed June 2 1924 2 Sheets-Sheet 2 'INVENTOR Efibuczek ATTORNEYS.

' UNITED STATES PATENT 1 orl-ica.

- T'EBDIN'AND SOUCZIK, OF NACHOD, CZECHOSLOVAKIA, ASSIGNOB T0 VEREENIGDE TEITIELKLATBCHAPPHEN MAUTNER, OF BOTTERDAM, NETHERLANDS.

enema-Dawn ARRANGEMENT.

Application filed June 25, 1924. Serial No. 722,420.

a race on both sides of the lay.

v different positions and A preferred embodiment of the invention is shown on the drawing byway of example.

Figures 1-3 show an improved gripping roller'in various elevations and sectlons.

Figure 4 shows the shuttle gripped -by the gripping roller.

Figures 57 are diagrams illustrating the mode of action of the gripping roller and means for limiting the vertical movement of the shuttle. v

Figures 810 illustrate an arrangement of shuttle box and an improved brake in three Figure 11 illustrates an improved buffer. The1 main differefices beizwelilanthe imrove ri i ro er an t e gripping i oller he ret b fo r roposed lies in the fact that the wedge egges of the roller instead of being closed 0 y at the moment when the shuttle is thrown are constantly closed being maintained in this position by resilient means and furthermore free entrance of the shuttle into the shuttle box is absolutely ensured by a lowering of the roller, i. e., by

' disappearance of the wedge edges from the race. The improved roller has four instead I of two wedge edges so that not only is the frictional work or efliciency of the gripping roller increased but the flexing of the side wallsof the box is entirely prevented. For

this purpose, the shuttle 10as shown in Fig. 4 is provided with two working bars 11 and 12 which are formed in the bottom of the shuttle .without any alteration in the actual shape of the latter. When the bars 11, 12 become worn they may be made up to the right thickness again by gluing on veneer (ply-wood) or any other suitable material or the bars themselves. may be made of fibre fixed either directly or by gluing to the shuttles and this can be repeated as often as is necessary.

' mounted on the pulle yxhub 3 and driven by the carrier p1ns4wit out in any way reducmg the lateral adjustability of the discs.

The hub of the pulley 3 is rotatably mount I ed onball bearings 6 on a spindle 5 and in addition to the holes for the carrier pins the belt pulley is also provided with a number of concentric axial holes for receiving a set of compression springs 7 and a set of tension springs 8. The compressionand tension springs are symmetrically arranged andtheir object is to ensure an equal springmg or compression on both sides of the pairs of discs 1, 1 and 2, 2. The discs 2, 2 in addition to the holes for the carrier pins are also provided with holes to. receive the It is advisable to make the tensile power of the tension springs somewhat greater than that of the compression springs so that the outer discs 1, 2 will be pressed with certension springs 8 which are held by pins 9.

tainty against the shoulder of the hub of the pulley 3 thus preventing the discs from belng thrown sideways. This arrangement of springs passing right through the discs and pulley has the advantage that both pairs of grippmg discs work with exactly the same force. It is however immaterial as regards the mode of action of the grip in what Way the springs holding together the pairs of discs are arranged; thus for example instead of the spiral springs radial leaf springs engaging on the outer surface of each disc may be used or again the individual wed e discs may themselves act as springs if t ey are made of thin steel plate and of suitable diameter. As willrbe seen from Fig. 4'the wedge edges of the pairs of discs are only forced apart to an inconsiderable extent b the shuttles and this only at the ints 0 contact indicated at a Fig. 5 of t e roller edge with the working ralls 11 and 12 of the shuttle 10 the discs remaining closed at the diametrically opposite point to the point of contact. Owing to this the planes of the discs during operation of the griplping roller are oblique relatively to each ot er, as seen in Fig. 4, and therefore it is not sufiicient for the discs to be merely loosely mounted on the hub as either the bore of the discs or the seating surface of the hub must be correspondingly bulged to prevent jamming.

The lift of the shuttle is limited by a late 13.. The latter, as will be seen from 1g. 5

is not arranged exactly vertically above the spindle of the gripping roller as in the with the vertical.

ping roller and the point of contact 0 the lift limiting plate 13 forms an angle a Owing to this moreover the theoretical direction of pick is deviated by this angle a. from the horizontal. The shuttle race however prevents the shuttle from taking this direction which is indicated in Fig. 5 by m-n. The front tip of the i shuttle owing to the endeavour of the shuttle to follow the theoretical direction is pressed against the-race while the rear. end lifts away from the race. This ensures the smooth running down of the shuttle in the same way as has sought to be done in the ordinary over pick loom by arranging the picker spindles higher up relatively to the lay. A further advantage of the present arrangement lies in the fact that the limiting bars 13 can be fitted higher thus giving greater clearance between them and the entering shuttle.

A still greater clearance between the shuttle and the height limiting plate is secured by the arrangement shown in Figs. 6 and 7. In this embodiment the limiting plate 13 can rotate about the pivot pin 14 which is fixed to the arm 15. This arm 15 is capable of rocking in the direction of the arrow shown in Fig.7 about a pivotal point 16 and is held by a stop and spring in the vertical position shown in Fig. 6 or even in front of the said position. If the shuttle is now brought within range to be acted on by the roller and consequently pressed against the height limiting plate the latter is carried along by friction the arm 15 being rocked through the angle 5 from the position of rest. This angle of deviation is equal to the angle of friction so that the tangent of angle [3 is equal to the coefiicient of friction. As the latter depends on the material it follows that for any desired' lateral displacement of the height of lift the length and position of the arm 15 can be determined. So soon as the shuttle has left the rollers the arm'of limiting plate returns to the original position and at the same time rises so that the vertical clearance can be still further increased. Owing to the possibility of rotation of the bar 13 round the pin 14 they are made to lie effectively against the shuttle and it is therefore rendered possible to give them a very flat or straight form so as to produce a surface contact instead of a line contact.

For the purpose of raising and lowering the gripping roller it is mounted on a cranked lever 18 which can turn about a fixed spindle 17 Fig. 5. The other end of this cranked lever is engaged by the tie rod 19 which in turn by simple lever transmishardly any strain because in the first place the line of pressure lying between the pivotalpointof the gripping roller and the height limiting plate almost coincides with the pivotal polnt of the crank lever, and in the second place the recoil produced in the gripping roller by the throw of the shuttle occasions a torque in the direction of the tensile stress (the tie rod.)

The brake action on the shuttle entering the box differs from the known arrangement in the first place by the fact that the brake wedge is relieved by a kind of swinging gear.

spindles carrying vertical and horizontal.

In the shuttle box are mounted two fixed spindles 21 and 22 Figs. 8-10 said arms 23 and 24 respectively the arms being rotatable about the spindles and are provided with hook- shaped shoulders 25 and 26 for receiving swinging supports 27.

Aroundboth the spindles mentioned a spiral spring LS wound which tends to turn the arms in the, direction shown by the arrow.

Owing to this the swinging support 27 is held stationary in its position which is defined by the connectin line ofjthe two shoulders 25 and 26 serving as theswinging support bearing with the spindle 21. Pressure exerted on the outer end of the arm 24 which is provided with a second swingmg support bearing 28 is transmittel by the swinging support 27 direct to the spindle 21. If by downward movement of a lever 16 also mounted on the spindle 21 the arm 23 is swung to the left the swing-- ing support 27 will be brought into the oblique position shown in Fig. 10 and the arm 24; will be inclined. In this movement the swinging support bearing 28 is lowered zlq some textent. In this swinging bearing ere res s a swin m su ort 30 carr in abrake block 29. g h 1 y D A further improvement resides in'the fact that the shuttle to be braked does not act directly on the spring 32 which absorbs its momentum but acts through a lever 31 to which a spring 32, is fastened at a point near to the pivot point of said lever 31 whereby said spring exerts a force roportional to the ratio of the length of t e lever and the distance of the fastening of the spring from the pivot oint. For this purpose the transmission ever (gearing down or purchase lever) is mounted in an arm 33 at the foot of the lay and is guided at its upper end in guides 36 the movement being limited by stops 34 and 35. The transmission of the momentum of the shuttle to the lever 31 is effected by the buffer 38 which is shown in plan view in Fig. 11 on an enlarged scale. The picker consists of a number of individual members 39 of leather or other suitable material joined to and connected with each other the end members 40 and 41 being of thick heavy leather the in termediate members between the end pieces expanding like a bellows.- One end piece carries a leather loop 42 through which the spring controll'ed lever 31 is passed the other end piece being preferably made heavier and provided with a nick or groove for the tip .of the shuttle. The buffer is of medium length and if the shuttle strikes with great'speed against it in the first place only the small mass of the leather end piece 40 is compressed and thereafter the remaining part of the bufler, after which begins the momentum of the shuttle is transmitted to the lever 31 and spring 32. While the sprung lever 31 is being moved outwards provision is made so that the brake block '29 is moved by a small force in the opposite direction and in this movement as it rests on the swinging support 30 is at the same time moved upwards and thus gently resses the shuttle'against brake bars 43 i itted on both internal sides of the shuttle box wall above the brake block opening.

by riveting a flat wire spring 44:to the swinging support 30 which spring is passed over a pin 45 of the lever 31.

As will be seen from Fig. 9 the brake pressure is transmitted by the swinging support 30 to the ratchet gear. Owing to the fact that the lever 46 which releases the ratchet gear is connected by the spring" '47 with the tie rod 19 when the latter is operated not only is the gripping roller 1 brought by the crank lever 18 from itsposition of rest (Figs. 8 and 9) into-the working position (Fig.10) but at the'same time Y the ratchet is moved to the osition indicated in Fig. 10. Owin to t is the brake ressure is ended and t e shuttle brought v y the taut spring 32 within the range of.

action of the gripping roller. The buffer owing to its mass inertia swings far beyond the position shown in Fig. 8 and is brought back to the latter by the elasticity of the leather members.

I claim:

1.' A loom picking mechanism having 3. A loom picking mechanism having means 01 throwing a shuttle comprising friction rollers composed of wedge discs located at the ends of the lay and means for raising the discs to engage the shuttle for the picking operation .and thereafter lowering the discs out of the path .of the shuttle.

- 4. A loom picking mechanism comprising means for throwing a shuttle-and a height limiting plate for said 'shuttle' capable of displacement slightly in the direction of the ic In the embodiment described this-is obtained 5. A loom picking mechanism comprising means for throwing a shuttle a height limiting plate for said shuttle which is displaced on the throw of the shuttle, a rocking arm carrying said plate and-means for returning said plate to its. initial osition on the completion of the throw of t e shuttle.

6. A loom picking mechanism com rising a shuttle, sidewalls on said shuttle t e bottom portions of which are rovided with longitudinally extending-wor ing bars having bevelled edges, and means for engagl ipg the said edges for throwing the shut In testimony whereof I have signed my name to this specification.

EERDINAND SOUCZEK.

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