US1715468A - Shuttleless loom - Google Patents

Description

June 4, 1929. R, G, MOYA mima@ SHUTTLELES S LOOM Filed oct. 22, 1927 4 sheets-sheet 1 M M 777W@ MJ@ June 4,1929. Re. MOYA l Mimes SHUTTLELE S S LOOM Filed Oct. 22, 1927 4 Sheets-Sheet 2 t "n"m" "mmM-' g wm June4,1929. R, G, MOYA 1,715,468

SHUTTLELESS LOOM Filed oct. 22, 1927 4 sheets-Sheet :5

Patented June 4,' 1929. l

UNITED STATES I'JATE'NT' oF-Flc.

nanou` GARCIA Monaci* coanELLA'- DE LLOBREGAT, SPAIN.

sHUrTLELEss Loon.,

Application led October 22,1927, Serial No.' 227,995'ai11 in Spain 'October 27, 1926.

This invention relates to looms without shuttles of the t pe in which the weftis taken from a bob in fixed to one sideof the loom. and in which for inserting the weft into the shed use is made of a iiexible arm or needle formed by a stripA of steel secured to the end of an oscillating arm disposed on one side ofthe loom, the movement of oscillation of which arm causes the said strip tov be inserted into the shed so as to pass the weft as far as the other side of the cloth which'isbeing woven and then withdrawn from the shed and curved along approximatelyl the circular v path traced out by the end of the arm to which it is secured. I

The improvements forming the subject of the present invention relate more partlcularly to the arrangement of the slayT and the mode of actuating the latter forv facilitating the insertion of the weft carrying stick into the shed, and also to the mode of actuating the arm at the end of which is secured the Iweft carrying stick. l

In. a loom accordin `to the invention the slay lis greatly simp ified 4and is simply formed by the reed and the uprights or rods necessary to support the latter so that it can make a movement of` oscillation, and this movement of oscillation, instead of being transmitted by means of a crank shaft as in the usual looms, is transmitted .by means of an eccentric of form such that during the greater part of the rotation of the eccent-ric the slay remains held in -the withdrawn position towards the rear alnd only' for a small part of the rotation of the eccentric the slay makes a rapid movement of advance in order to close up the weft and of recoil in `order to return and remain fixed in the rear position. The result is thus obtained that the shed remains free for the passage of the weft carry-y ing stick for the greatest possible length of time and, at the same time, that the angle of oscillation of the slay may be ver small because after having closed the weil; itsimply has to move back through the anglenecessary `to permit the weft carrying stick to pass through the shed. y l

v Thevarm' 'or leverwhich actuates the weft carrying stick receives its movement, accord-` ingto the invention,by means` of a crank and connectin rod mechanism driven by the main shaft of tlg reciprocating oscillatory moven'ientA .to a toothed sector engaging' with a pinion of e loom, and this mechanism gives a small diameter mounted upon the pivot of the arm upon which is-mounted the weft carrying stlck. l

It is thus possible, with a small'throw of improvements formingthe subject of the present invention. L n .l

Fig. 1 is a front'view of the lom.

Fig. 2 is a planview, of the same.

Fig. 3 is a slde view and .Y

Fig. 4 a section taken along the line IV-IV in Fig. 1, certain parts of'the machine being omitted for clearness. l

As shown in the drawings, the loom comprises a frame 1 at the. back of which is mounted in the usual manner` a warp beam Zupon which is disposed the warp and at the front part another beam' 3 upon which is wondthe cloth manufactured. This frame 1 carries the main Vshaft/1 ofthe loom which is drivenby the driving pulleys 27 and which replaces the usual crank shaft of looms. This main shaft 1 transmits movement through the medium of a transmission chain 5 to' a lower shaft 6 which is the tappet shaft and carries the tappets for-.actuating the'healds 7 in the usual manner.` y Y *i The weft comes from a iixedbobbinv 8 and `is inserted-intov the shed by .means of a weft -inserting sticker needle formed b'y a` steel strip 9 which s secured to the end of an oscillatingA arm lland, bythe movement of os cillati'on of this arm, ity inserted into the shed and withdrawn from the latter. This stick 9 terminates at its end in ahead through which passes thewefty thread so that when ioo is insert-edinto the shed it inserts the weft thread double and at the left hand end. f

the loom/isA prcwided a mechanisml, which is not shownin detail'in the drawingswhich catches thefbend or knot formed b the yend of the inserted dauble4 weft. ihre andtis it forming the selvedge of the piece of cloth, y c According to theA present inventionv the Slj'y; which iSrdllfed ttWQ POSS 12- which carry at their upper part the reed 13, is"l ids posed in such a way that it makes a very small angle of oscillation and that during the greater part of the rotation of the main shaft 4 it remains withdrawn in the position shown in Fig. 4 in order to permit the. weft carrying stick 9 to pass easily and then when this weft carrying stick haslbeen inserted in ,the shed and has turned to return, the slay makes a rapid forward movementin order to close up t e weft and a rapid return movement to remain once more held in the furthest back position shown in Fig. 4. For this purpose intended to give the slay 12 the rapid for ward and return movement.

In this wa it is possible to reduce the oscillation of theslay and in return dispose of the/greater part of the time occupied in the rotation of the main shaft 4 for making the weft carrying stick pass through the shed. By virtue of this arrangement the loom 'may be made to work at a relatively high s eed without the movement of the slay impe ing the movement of the weft carrying stick.

The reciprocating movement of the weft carrying stick 9 is produced by the movement of oscillation'of an arm 11 to the end of which is secured the strip or stick 9 but according to the present invention the mechanism employed for transmitting the move-- ment of oscillation to this arm 11 is disposed in such a way that this movement can have'a great amplitude, reaching easily 180 and even exceeding this angle, with the result that the radius ofthe circular 'arc necessary for taking up the whole length of the weft carrying stick 9 is 'very small and consequently that the loom occupies less space.

lForthis purpose the arm 11 to the end of which is secured the""weft carrying stick 1s mounted upon a shaft 17 which carries a toothedpinion 18 which is rotated by means of a toothed sector 19 mounted upon the lower jshaft 20. Thiseshaft 20 receives a movement of 'oscillation through the medium of a lever 21 secured to the shaft 20 and a connecting rod 22 pivotally connected to the pin 2 onthe fiywheel 24 ofthe loom mounted upon the main shaft 4. In this way a rela-- vtively small oscillation of the arm-21 and'of the shaft V.2() may be made to give the shaft 17 and the arm 11 a very Alarge angle of oscillation, the ratio depending solely upon the ratio between the radius of the -pinion 18 and that of the sector 19. In the contrary case, l

this large angle of oscillation of the arm 11 could not be obtained because the oscillation of the rod crank 21 which isfdriven directly by'. the rod 22 has always to tak'e place through a small angle for it to be possible to transmit the movement from the crank 23 of the-.shaft 4. f

In order to make the stick 9 curve over a circular .arc when it is bent b the'movement of the arm 11, thereis provi ed onl the loom frame a memberl 25 of semi-circular form provided with the necessary number of rollers 26 for guiding the stick 9 both when it is curved by the movement of the arm 11 and when it leaves this member 25 and is inserted in the shed. A

I claim 1. A shuttleless loom serting mechanism comprising a iexible weft carrying rod, an arm secured to said rod, mechanism for oscillating said arm, and guiding means for said rod, said lmeans comprising an arcuate member. and a plurality of rollers mounted thereon, said rod being constrained to conform substantially to said member when withdrawn.

2. A loom as claimed in claim 1, said oscillating mechanism comprising a pinion secured to saidarm, a tooth segment meshing with lsaidV pinion said segment having a larger radius than said pinion, a rocker arm secured to said segment, a crank-shaft, and a connecting link between said crank shaft and said rocker arm whereby an oscillation of small amplitude' of said rocker armcauses a relatively great oscillation of said first mentioned arm. f

In testimony whereof I have Signed my name to this specification. A RAMON GARCIA MOYA. A

including a weft in-v

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