US1177343A - Dobby or jacquard of weaving-looms. - Google Patents

Description

G. E. LEVY.

DOBBY 0R JACQUARD or WEAVING LOOMS.

APPLICATION FILED MN.22, 1912.

Patented Mar. 28, 1916.

INVENTOR H H mIM/N WITNESSES ATTORNEYS THE COLUMBIA PLANOGRAPII c0.. WASHINGTON, D. c.

G. E. LEVY.

Patented Mar. 28, 1916.

a K P ATTORNEYS DOBBY 0R JACQUARD 0F WEAVING LOOMS.

APPLICATION FILED JAN. 22,1912. 1,177,343.

WITNE SSES THE COLUMBIA PLANOGRAPN co-f WASHINGTON, D. c.

G. E. LEVY.

DOBBY 0R JACQUARD 0F WEAVING LOOMS.

APPLICATION man m n. 22, 1912. Patented Mar. 28, 1916.

SSHEETS-SHEET 3.

I fi W 'G 'THE COLUMBm PLANOGRAPH CO., WASHINGTON, D. c.

UNITED srnrrns r -TENT OFFICE.-

"GEORGES-ELIE LEVY, or renrs, FRANCE.

BOBBY on moonennon wnevine noons.

Specification ofI-etters Patent. Patented 31211228, 1916.

Application 'fiIeil January 22,1912. Serial No. 672,636.

quards of weaving looms'of the type described inthe United States Patent No.

987,086, of March 14, 1911. In the'said patent, the shedding bars are mounted in such a way as to slide upwardan'd downward or inversely'on a needle-bar; the lat- }ter slides transversely from left to right or inversely, at the required moment, by a needle subjected to the action of a'n'eedle-card, said needle being engaged by a springpressed needle-bar. The objection to this arrangement is that the"transverse'sliding of the shedding bar being at-rightangles relatively to the traction of the cords connecting said shedding bars to the rocking levers of the loo-m,-said cords are taut and" muststretch each time to permit the transverse-sliding of the shedding bars. This precludes the employment of-metallic connectingbars for connecting the-"shedding bars with said rocking levers. Furthermore, the needle-card, for sliding the sheddingbars,must-overcome this tension of the cord-s,aand thisis liable to'injure the n'eedle card. 9

The present invention consists in mounting the shedding bars on'supports,directly connected by metallic-connecting barswith the rocking levers; each shedding bar slides transversely, from left to right, and inversely on its support which serves as a guide,-while the support always remains in alinement with the traction of the connecting bars. In order to facilitate the transverse sliding'of th-eshedding bar in its support, the shedding bar and the support are provided with inclined engaging surfaces. Bythus mounting the shedding barit acts only-as a controlling and hookingbar.

On each of the lowering and lifting knives isprovided, an auxiliary-knife, the purpose of which is toretain tli'eshedding bars, when thevareno longer hooked by said loweringzandlifting k-niv'es, toprevent them from returningtoo suddenly under the-effort of the tension of the warp thread passed in the heddle of the harness of the loom, to the position of the closed shed, that is to say to the intermediate position between that of the lifting and that of the lowering. Said auxiliary knives accompany the shedding bars andhold them to half of their course,

that-is to s'ayj, np to the moment where the tension of the'warp threads cease exerting an action'on the shedding bars.

On the annexed drawing: Figure 1 is an elevation showing in full lines the shedding bar provided with its support and hooked to its lowered position; the dotted lines lIlCllcate the same shedding bar unhooked and ready to be lifted. Fig. 2 is a transverse section on the line 2-2 of Fig. 1; Fig. 3 shows, in part, two shedding bars, on a larger scale for allowing to see the arrangement of the control of the auxiliary knives,

the front shedding bar being lifted and the rear one belng lowered at the moment supposed of their unhooking, that is to say, inthe position Where the auxiliary knives hold them; Fig. 4 shows the shedding bars hooked, after the'auxiliary knives have released them, the front shedding bar being hooked in its lower position and the rear one in its lifted position; Fig. 5 shows, in elevation, the whole of the motion, with a shedding bar provided with its support, hooked at its lowered position; and Fig.6

is a detail view showing the stops and how they are supported. g In said figures,-for a better understanding of the drawing,'two shedding bars only are shown, but it is obvious that the loom may have any number. 7 7

Referring to: the'drawing, each 'heddle a, of. which the whole constitutes the harness of the loo n1 (seefFigfi) is connected to a rocking lever Z) and to the upper part and to the lowerpart of theshedding bar sliding on a needle bar Z. The needle bar is provided with two lugs (Z engaged in the grooves of the shedding bar, so that the.

shedding bar 0 partakes of the motions communicated to the needle bar (Z' by the needle esli ding" intheplate pl and engaged by the frontend d of thje needle bar (Z. Theneedle bar d isguided by a rod d. carried by the-needle-bar and sliding in aplate cZ and'a spring qlfi stlrrounding the said bar (Z between tlie needle bar d anldthe plate id, holds thefront end- Z of the needle bar constantlyinengagement with theQnedle e.

' The shedding bare has a notch c engaged by a spring pressed latch f f for the purpose of engaging and holding the shedding bar in its lowered position; an inclined projection 0 on which a movable bar 9 acts and called unhooking bar for lifting the shedding bar when it is hooked on its lifted position; a notch 0 for the lifting knife is, a notch c for the lowering knife Z; and a notch 0 engaged by a spring pressed latch h h for hooking the shedding bar when in its lifted position.

The needle card 2' acts in the regular way on the needles 0 andv can be brought nearer or driven away frcm said needles by the controlling contrivance 7' in order to permit the changing of the card. a

In the position shown in Figs. 1 and 5 as well as in Fig. 4, the shedding bar 0 is hooked in its lowered position, that is to say, the corresponding heddle a is in the lifting position (Fig. 5) while the shedding bar 0 (Fig. 4) is hooked in its lifted'position, the corresponding heddle a being then at its lowered position (Fig. 5).

. Let us suppose that the needle 6 of the shedding bar 0 is in front of a hole of the card 2' (Fig. 5), the needle of the shedding bar 0 being before a solid part, the spring cl will cause the needle 6 to enter the perforation of the needle card i and will thus hold the notch c of the shedding bar 0 in engagement with the latch f, and the shedding bar 0 will remain at its lowered position. At the same time, the unhooking bar 9 will lift the shedding bar c ,but the needle of the latter meeting a solid part of the card,

this shedding bar will not be able to slide transversely and the nctch 0 of this shedding bar 0 will drop in engagement with the latch h, the shedding bar c thus remaining at its lifted position.

If theneedle card is changed in such a way that the needle 0 of the shedding bar 0 meets a solid part, and the needle of the shedding bar 0 meets a hole of the card, when the cylinder comes to rest again, under the action of the controlling contrivance j, the following effect is obtained: The needle e is laterally pushed, as well as the needlebar (Z, and the shedding bar a in the position shown in dotted lines in Fig. 1 (that is to say toward the right. Fig. 4), compressing the spring cZ while the shedding bar 0 the needle of which meets a hole of the card, can be pushed back in a contrary direction by the tension of the corresponding spring cl, when the unhooking bar g lifts the shedding bar 0 by the notch 0 in such a way that the notch 0 of this shedding bar 0 can be released from the latch 71.. The knife is, which at that moment lifts, meets the notches c of the shedding bar 0 (Fig. 1) and lifts the latter until hooking its notch 0 on the latch h, the shedding bar 0' is thus brought to its lifting position. The

said shedding bar 0 to descend and to hook it at its lowered position,.by means of the latch engaging the notch 0 the shedding bar 0 being held by the spring (Z in such a way that it cannot be lifted under the action of the lifting. knife 70, but the correspondingneedle, meeting a solid part of the card, presses said spring d and disengages the shedding bar from the latch f. In the same way, the shedding bar 0 engaged by'its notch c with the latch in, will not be able todescend, under the action of the lowering knife Z, but when its needle 6 meets a hole of the card, will be released from the latch h by the lifting motion of the bar g; this unhooking position is shown in Fig. 3. The motions are thus reproduced, the lifting knife dragging the lowered shedding bar, which must be lifted and hooks them on'the latch it, while the lowering knife Z drags the lifted shedding bar which must be lowered and hooks it on the latches f.

The transverse sliding of the shedding bars required for producing their unhooking, being at right angles relatively to the traction of the members connecting the shedding bars to therocking levers ofthe motion, produce a tension upon said members, and consequently the latter must be elastic in order to-permit of this movement; furthermore, the needle card for sliding the shedding bars, must overcome this tension and this IIIJUIGS the card.

The construction so far described is all;

old, being substantially the same as that shown in the hereinbefore mentioned patent;

According to the present invention, the shedding bars 0, are mounted (see Figs. 1, 2 and 3), on supports serving as guides and which always remainin the vertical plane in which the traction is exerted on the members connecting the shedding bar to the rocking levers. These members can consequently be made of metallic connecting bars 2. These supports each consist of two cen-- tral members on having eyes m with which engage the ends ofthe connecting bars-z,

and two bracket membersm one of which connects the member m and the other terminates near the inner ends of said members in such a way as to leave room for the needle bar (Z. The members we are formed with inclined ways, respectively m m with which the inclined ends of the shedding bar a engage. The inclination of said ways and ends of the shedding bars is such that they facilitate the sliding ofithe shedding j bars 0 laterally. One of the members m at each end of the support, is provided with an edge portion 722 said portions serving as stops to limit the sliding of said shed ding bar, before thelifting of the lowering zkn affi'act flnzthe-latter. When'stheshedding bars .are ;hooked,'either in-their :lowered position, or their @lifted' position, the Warp threads, passing -thlrough 413116 heddlesua, .aconstitutingzithe loom harness, exert a tension on said lheddl-es to bringathem badkw to' an intermediate-position ;to the 1 lowered or lifted position, :that is to say, i :to the :position of the closed shed, (shown by ,A -,A of Fig. 5). This tension isze'xert-edaby the rocking levers?) and theconnectingibarscz on their supports. When the shedding "bar 0 .ishooked, asqshown on-Figs. ,1'and5, in its lowered position, the warp threads exert-a tBIISlOIlOIlziQhG lifted heddle 1a (Fig.5) and tends to lower itinithe direction'of-the arrow to this forces the :support rm, also .in the direction {of the :arrow w by the action of the -connectingbars :2.

VVhen-theneedlee meets .a solid part of the card i, {the yshedding bar 0 is pushed laterally toward-theqle'ftof Fig. '1, and thus causes the unhooking of the said s'hedding bar a. The support under the action rofthe connecting bar "a at the-upper endthereof, acts by its inclined way wa on that of the shedding bar and thus facilitates-the .lateral sliding ofthelatter llIldGITtl'lE actiomof the pressure of the :oard-ionthe-needle-e and the shedding bar-isbrought-;to"the1posi-' tion shown on the dotted lines (Fig. 1 where it presen't'sits notch 0 to the lifting knife is.

The inverse effect is produced .for the hooked shedding bar in its ili'ftedwposition, that is to say, when the heddle a is at its lowered position; it is :then' that-ithe inclined way m of the support m acts onthe inclined end of the shedding bar, being urged by the connecting bar 2 at the lower end of the support together with the tension of the warp thread on the heddle a and causes the transverse sliding of the shedding bar from the position in dotted lines to the position shown in full lines, in order that it presents its notch c to the lowering knife Z.

With this arrangement only the supports slide in the direction of the traction of the connecting bars a, the shedding bars merely acting as hooking bars.

Under the effect of the tension of the warpthread on the heddle a, a, the shedding bars are urged to abruptly return to the position of the closed shed as soon as they are unhooked (see Fig. 3), and to avoid this abrupt motion, auxiliarv knives Z and are mounted on the lifting and lowering knives 7c and Z, respectively. The

knives extend, like the knives k and Z to the whole length of the motion, and are carried by the angular rocking arm W. Z mounted adjacent the knives 7c and Z. The arms 72 Z carry rollers 70*, Z which, under the pressure of their springs is, Z roll on inclined :TvvaysLIkZ-IF :ea'rried iby gthe knives l, speetiveliy. The oscillation. of the auxiliary knivesvk arrd- 2Z isucontrolled'bystops 8 8 engaging the inclined :wa-ys 9Z6 "Z These stops, ShOWniin :the -:drawings,' are in the iIEQETIlQOfI'bOlhS :adjustably mountediin -lugs 1" aprojectingwfrom the' lolwer and :upper -ifa'ces respectively ofthe auxiliary knives lc "l so that-*theiyrcambe movedtoward and fromithe inclined waysal: 5Z 'Saiddnclinedwaysiand saidv a-rrnsxare mounted on the knives flc,i"l'- of each side' of the whole .of sthe shedding bars outside of the active-part ofithe knives.-

The-shedding bars 0 and c are provided with notches 'and 0 with-which I-engage theaauxiliary rknives 11 :72 for holding-the Shedding bars :at the moment of their unhooking; and thus avoid+an abrupt 7 return of the closed shed.

At the moment ofthe-unhooking of'the shedding bar 0 from its lifted position-and of-thc sheddin'gbarc from'its lowered position z( see Fig. :3 the tension :of the'warp threads on the"heddles a,.a acting on the su'pportszby :the connecting bars 2, c-tends' to cause the abrupt-returning. of the shedding bars 0 rand-c ,respectively, from their upper and-.l-o-wer :positions. 'This is prevented by theiknives Z and k tl1e-IOlle1S 1*, -70 of which areout of engagement nwithathe inclined-ways l9, 5k engaging ,under the action of the -.springs Z 10 the notches 09,0 of tihfl'shedding ,bar 0 and c which are-ainhcoked. The knivesl and 10 thus accompany the shedding bars, holding them Y up a little farther than half of the travel, that is to say,. up to :the moment when the*tension -of the' warp threads ceases to exert action on the shedding bars, owing to the heddles a, a of the harness having returned to their intermediate position A, A (Fig. 5). When the parts are in this position, the inclined ways I, is engage the rollers Z*, k", and rock the auxiliary knives Z I0 wh ch are released from the notches a, 0 of the shedding bars a and 0 the latter are then moved to their new hooking positions (respectively with the lower position and the lifted position) by the knives Z and is, thus opening the shed up to the position shown in Fig. 4.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A double shedding motion for open shed weaving looms, comprising shedding bars, a lowering and lifting knife actuating said shedding bars, a series of latches holding the shedding bars hooked in the lifting position, a series of latches holding said shedding bars hooked in their lowering position. a support serving as a guide for each shedding bar during their transverse slid ing under the action of the needle of the needle card, and members connecting the support with the rocking levers of theloom,

said-support sliding only in the direction of the traction of the connecting members joinbars, a lifting knife, a lowering knife, said knives actuating said shedding bars, a series of latches holding the shedding bars hooked in their lifting position, a series of latches holding said shedding bars hooked in their lowering position, a support serving as a guide for each shedding bar during" its transverse sliding under the action of the needle on the needle card, and metallic bars connecting the support with the rocking levers of the loom, said support sliding only inthe direction of th traction of the said connecting bars, said support and shedding bar having engaging inclined surfaces to facilitate the transverse sliding of said shedding bars on their supports.

3. A double shedding motion for open shed weaving looms, comprising shedding bars, a lifting knife, a lowering knife, said knives actuating said shedding bars, a series of latches holding the shedding bars hooked in their'lowering position, another series of latches holding the shedding bars hooked in their lifting position, and two auxiliary knives mounted to rock, one on the lifting knife, the other on the loweringknife, said auxiliary knives engaging at the moment of unhooking the shedding bars, corresponding notches in said shedding bars, so as to accompany them and retain them when they Copies of this patent may be obtained ,for

are unhooked up to half of their traveh in order to prevent the abrupt return motion to the position of the closed shed under the action of the tension of the'warp threads.

4. In a double shedding motion for open shed weaving looms, comprising shedding bars, a lifting knife, a lowering knife, said knives actuating said shedding bars, a series of latches holding the shedding bars hooked in their lowering position, a series of latches holding thegshedding bars hooked in their lifting position, two auxiliary'knives mountd to rock, one on the lifting knife, the other on the lowering knife, said auxiliary knives engaging, at the unhooking momentof the shedding bars, corresponding notches in said.

shedding bars, so as to accompanv themand to hold them when they'are unhooked up.

to half their travel, for preventing their" abrupt return motion to the position of the, closed shed under the action, of the tension of the warp threads, inclined ways mounted v enonens ELIE LEv-Y. Witnesses:

.PAQUES LEJEUNE,

LEON PAELLET. V

five cents each, by addressing the Commissioner of Patents,

Washington, D. C. I v

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