US2502735A - Loom with stationary weft supply - Google Patents

Description

Aprifl 4, 1950 N m 2,502,735

LOOM WITH STATIONARY WEFT SUPPLY Filed Oct. 6, 1947; I 5 Sheets-Sheet l April 4, 1950 J. MANNING LOUM WITH STATIONARY WEFT SUPPLY 3 Sheets-Sheet 2 Filed Oct. 6, 1947 Invenlor April 4, 1950 J. MANNING 2,502,735

LOOM WITH STATIONARYWEFT SUPPLY Filed Oct. 6, 1947 5 SheetsSheet 3 IGVENTOR. BY

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ATTORNEYS Patented Apr. 4, 1950 DOOM-WITH STATIONARY'WEFT SUPPLY" James Manning, Prestwich, England Application October 6, 1947', Serial No. 778,234 InG'reat Britain October 7, 1946 This invention relates to: improvements in" looms: for weaving. of.- thetype. employing a.- sta--.

tionary weft supply, the weft. being inserted by a; member carried by an armoscillating. forwards and, backwards through; the. shed, the shedbeing changedevery two picks, i..e. after: each. com.-

plete forward and backward. movement of the arm;

In looms of thistype the interweaving; of the weft with the warp threads does-.notform; a selvedge at one edge of the cloth and it is necessary to provide means for forming a selvedge along such edge and the main object of the present invention is the provision of improved:

means for formingthisselvedge.

According to the inventionit-he. aforesaidselvedge is. formed by a shuttle which. is oscillated or reciprocatedat the edge of the; warp threads and at right angles thereto to insert a. binder thread inthe 100p 0f the-weft formed between:

each pick at the opposite side: of thewarp: to that in which the weft inserting; member enters theshed.

' The: invention" is illustrated in and; will be described with reference to the accompanying drawings which show it applied: toa-smaIlWa-re:

ornarrow fabric loom; In these drawings:

Fig; 1 is a side elevation looking in the die rection of the arrow A,.F-ig'. 2;,with spring arm D removed;

Fig. 2 is a plan view of same;

Fig. 3 is a side elevation of same from the opposite side to Fig. 1;

Fig. 4 is a diagrammatic plan;

Fig. 5 is aside elevation of the shuttle for inserting the binder thread and the shuttle race therefor;

' Fig. 6 isafront elevation .of'Flig. 5;.

Fig. Tie a sectionalplan'. on line 1-1", Big. 6;

Fig. 8 is a plan. of. the. shuttle and weft in.- serting' needle showing the loop; formed for the passage of the shuttle;

Fig. 9 is a perspective view showing the arrangement of the tensionin'g roller and its. adjusting means.

The various parts of the loom are driven from a crankshaft it which receives its motion through a fast and loose pulley H and I2 driven from any suitable SOlllCB of power.

The weft yarn B is supplied from a bobbin or the like 0 carried by a bracket 0 mounted on a vertical pillar C and is inserted into the shed of the warp threads A by a curved needle D carried by an arm 2! pivotally mounted on the frame of the loom and oscillated from the 3. Claims; (Cl. 139-124 crankshaft till. Asis'. indicated in". the diagrams matic. plan shown in Fig. 4' and in Fig. 9 the weft Br'passes; from the bobbin. CT around; a. con".- ical' roller D driven from. thevshaft. m, the speed of rotation of the roller D being such thatit:

unwind's a length of yarn fromathebobbinrc for each complete oscillation of the arm: 2i|,. i'.. efor each double" pick equal to twice; the. width.

of the cloth. By altering the' position of the.

weft on the roller D the: amount of yarn. un'-- wound from the bobbin C for each double. pick:

can" be varied according'to the width-of the cloth being woven. The weftv is guided; to and. from:

the roller D by a tensicning roller 0' the position of which can be adjusted" axially relative.

to the roller. The, conical! roll r DJ is rotated b a belt or cord 52 passing over a; pulley: 53.:

on the crankshaft iii and over a pulley 54". on;

the roller spindle Bil carried in a bracket. 55]

I which carries the: shedding mechanism. The. tension roller 0 is. mounted on a. U.-shaped:arm

55 carried by a; screw threaded spindle 5T sup;- ported by the bracket Eton the frame, theposie tion of the arm 55 on the spindle being adjustable thereon. A weight 58 is suspended. from.

the arm 55 to. apply tensionto' the roller c. The:

yarn. B passes. to the: rollercrover a thread guide:

iifimounted on the arm 55.

From the roller 1) the weft yarn B; passes. through. a stationary guide eyed, then through:

an eye, (1 at the end ofa spring arm. D oscillating with: the arm 2!; tov maintain a; tensionon; the yarn and! from. thence to an eye: (1 in: the weft inserting'needle D The arm 21 carrying the weftiinserting needle:

D is secured to the upper end of a verticalirocking spindle 22 journalled in a. bearing 23 and oscillated from arocking lever l5icarried by.

a horizontal shaft: I? through the member 20 one end of which is: pivoted in a rod 24 eccen trically mounted in relation to the spindle 22 and the other end of which similarly engages a block I52 on the end" of the lever [51.

The shaft fl is journalled in the loom frame? l8 and is oscillated from the crankshaft It by" a connecting rod [3 one end of which is mounted on a crank M on the shaft Ill the other end is pivoted to the lower end of a rocking lever l5, the upper end of the lever l5 being secured by a screw Hi to the horizontal shaft IT.

The reed IQ for beating up the weft is carried by the rocking shaft ll so that its movement is synchronised with the movement of the weft inserting needle D The warp threads A pass from a beam or bobbins over the back rail 25 of the loom and the woven fabric passes over take-up rollers 26 a shed for the passage of the needle D between the warps A being formed in the usual manner by healds 21 operated from the crankshaft ID in any known way. The take-up rollers 26 are geared together and driven through a worm 2'! and worm wheel 28 through a ratchet 29 and pawl 30, mounted on an arm 3| connected by a link 32 to an arm 33 carried by the oscillating spindle 22.

The length of the arm 2| is such that the eye d of the weft inserting needle D passes completely through the shed at each oscillation of the spindle 22 and, as indicated in Fig. 4, to a sumcient distance beyond the warp threads to form a loop in the weft B. 1

The shed changes every two picks, i. e. the needle D inserts the weft double through the shed and the shed is only changed when the needle D has returned to its initial position. It will be evident that no selvedge would be formed by the interweaving of the weft and warps at the side of the latter remote from that at which the needle D is inserted into the shed and in order to form a selvedge at the aforesaid side a binding or selvedge forming thread a is inserted into the loop of the weft B from a spool 34 carried in a shuttle 35 which is caused to pass through the loop in a similar manner to the action of the shuttle of a sewing machine.

The shuttle 35 is traversed over a vertical arcuate race 36 by a forked arm 31 carried by a rocking shaft 39 carried in brackets 40 mounted on a shaft 4| supported by the loom frame 18. The shaft 39 is rocked in one direction by a strap 42 connected by a link 43 to a lever 44 pivoted on the loom frame and provided with a roller 45 engaging a cam 46 on the crankshaft l and in the opposite direction by a second strap 41 connected to a spring 48 anchored to the frame I 8 of the loom. The shuttle race 36 is afiixed to a pillar 38 on the frame.

The shuttle race 36 is provided with plates 36| screwed thereto to form guides for flanges on the sides of the shuttle 35. Transversely of the race 36 a slot 48 is formed for the passage of the needle D as shown in Fig. 7. After the withdrawal of the needle D the shuttle returns to its initial position.

The binding thread a from the spool 34 passes through a yarn guide 49 and between two tension plates 50 and out through an aperture in the side of the shuttle so that after each beat up of the weft by the reed l9 it lies parallel to the warp threads A.

Although not limited thereto the invention is particularly applicable for use in the production of narrow width fabrics such as tape, petersham, ribbons, webbing or the like.

Iclaim:

1. In a loom for weaving of the type described, the combination of an oscillating arm and a weft inserting member carried thereby, of a shuttle arranged at the opposite side of the loom to that on which the said member enters the shed, a weft supply bobbin mounted on th loom, means for reciprocating the shuttle to insert a binder thread into a loop formed in the weft by the change in direction of the weft inserting member at the end of its forward movement, a. pair of rollers between which the weft passes and one of which rollers is conical, and means for varying the position of the weft axially relatively to the rollers for the withdrawal of the required length from the supply bobbin for insertion by the weft inserting member.

2. In a loom for weaving of the type described, the combination of an oscillating arm and a weft inserting member carried thereby, of a shuttle arranged at the opposite side of the loom to that on which the said member enters the shed, a weft supply bobbin mounted on the loom, means for reciprocating the shuttle to insert a binder thread into a loop formed in the weft by the change in direction of travel of the weft inserting member at the end of its forward movement, a crank shaft for operating the weft inserting member, a cam on said crank shaft, a lever oscillated by the cam, a rocking shaft, a. strap connecting the cam oscillated lever to the rocking shaft to rotate it in one direction, a second strap controlled by a spring to oscillate it in the opposite direction, and a forked arm mounted on the rocking shaft and connected to the shuttle by which the shuttle is reciprocated.

3. In a loom for weaving of the type described, the combination of an oscillating arm and a weft inserting member carried thereby, a shuttle arranged at the opposite side of the loom to that on which the said member enters the shed, a weft supply bobbin mounted on the loom, means for reciprocating the shuttle to insert a binder thread into a loop formed in the weft by the change in direction of the weft inserting memher at the end of its forward movement, a conical roller and a tensioning roller between which the weft passes, and means for adjusting the tensioning roller relative to the conical roller such that the required length of weft is supplied to the weft inserting member to be delivered on a complete forward and backward movement of the member.

JAMES MANNING.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,362,625 Hughes Dec. 21, 1920 1,503,290 Quaresima July 29, 1924 1,946,427 Lambo Feb. 6, 1934 2,439,594 Bassindale Apr. 13, 1948 FOREIGN PATENTS Number Country Date 324,785 Great Britain Feb. 6, 1930

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