US1437682A - Power loom for the manufacture of oriental, persian, wound, and other knot-stitch carpets - Google Patents

Description

lIIlll lIlIllll P. AND A. RENARD. POWER LOOM FOR THE MANUFACTURE OF ORIENTAL, PERSIAN, WOUND,

. AND OTHER KNOT STITCH CARPETS. L M FfiSQQ APPLICATION FILED JULY 2. I922.

Patented Dec. 5, 1922.

2 SHEETSSHEET l.

1 l Il P. AND A. RENARD. POWER LOONI FOR THE MANUFACTURE OF ORIENTAL, PERSIAM'WOUND,

AND OTHER KNOT STITCH CARPETS. APPLICATION FILED JULY 2.1922.

1,431,682,, v Patented Dec. 5, 1922.

2 SHEETS -SHEET 2.

Patented 5, i922.

re trier...

PIERRE RENARD AND ALBERT REI IARD, OF NONANCOURT, FRANCE.

rowan LOOM ronrnn mannracrnnn or ORIENTAL, PERSIAN, WOUND, AND crime imor-srrrcn oiinrnrs.

Application filed July 2, Serial No. 393,765.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1921, 41 STAT. L, 1313.)

To (14% whom it may concern: I

Be it known that we, PIERRE RnNAnD and ALBERT RENARD, both citizens of France, and

residents of Nonancourt, Furs, France, have invented certain new and useful Improvements in Power Looms for the Manufacture of Oriental, Persian, Wound, and Other Knot-Stitch Carpets (for which we have filed applications for. patents in France, October 31, 1913, No. 474,098; Holland, Jany. 1914, No. 2390 England, March'8, 1917, No. 104690; and inSpain, Jany. 21, 1920, not granted), and of which the following is a specification.

As set. forth in United States Patent No.

894,287 forpower loom ior'themanut'acture of tufted pile fabrics and in Patent No. 969,-

565,'for loom for weaving oriental and other knotstitoh carpets, the formation of a knot for oriental carpet on the loom. depends upon a distributer and a lrnotting apparatus.

Under the action of the jacquard patterns,

that is according to the design to be reproduced, the distributor brings the pile thread from the various colored bobbins to the con tre of distribution whence "it is'drawnwout by a distributing gripper whose length cor- The knotting apparatusseizcs this portion of the drawn thread which is out oh? by shears at the distributing point, and knots thesame upon the warp threads which are separated and stretched by a divider in thelrnown manner.

In the first of the patents itlJOVGLIIlGlltioned, No. 894,287, the elements of the 100111 have a considerable size. A considerable spacing is found necessary in order to dispose the mechanism o'fgrippers, shears and divider between the distributers. "This'space occupied. naturally limited the number of.

distributors and knotting apparatus on" a loom, and the output was ingly.

The dispositions of Patent l lof969,565. already enabled the reduction of thespace occupied by the elements and particularly by the sheers disposed upon the looping dereduccd accordvice itself, but this was however not sufficientto provide for a large output."

"The present invention is intended to eliminate all mechanism betweenthe 'distributers so as toreduce their spacing'tothe minimum represented by the'length of the stroke of the distributing gripper.

Under these conditions, it will be readily oberved that as the pile of the carpet betributed is longer, whence a less number of distributers can be mounted on the loom;

conversely,- as the pile becomes shorter, a

jgreaternurnber of apparatus can be disposed on the loom. 1

the supports of the grippers and their mechshaft of the dividers are i mounted;

anisms and the Figs. 6, 7, 8 and 9 are detail viewsshewing howa d vider 15 mounted and controlled.

comes thicker, the pile thread to be dis- Referring to Figs. 1 and 2, 1 is a distributor with converging blades 2; 3 is a distributing gripper, 4 is a divider, 5 the shaft thereof and batten T. p

Between two adjacent distributors 1; 1, there are nomechanical parts,the space be-. ing exclusively reserved for the passage of the threads to be distributed;

f-The gripper 3 is indicated on Fig. 2 only 'by its centre of oscillation 8 and by the lines 9, 10,.indicating the position which it "has on the one hand when it seizes the pile thread and on theother hand when it has fully extended the latter; these lines are in sorted to show that the divider 4 has to oscilsuitably above that or the centre 12 ofdisstages of operation; it passes'thro'ugh the meshes139 of a set of threads 38 controlled by the jacquard device and which raises the 6 is the reed mounted on the I 5 or is otherwise fixed in the shaft.

same in the known manner. K. Y show the warp the inoperative position; X -Y show it as raised by the divider above the centre of distribution 5 X[ show it in the stretched position when the stitch is locked; this operation is set forth in the above named patents. I

A number of frames 13 are arranged at suitable distances apart along the width of the loom for supporting the distributors and the grippers and their mechanismsand also to serve as bearings for the shafts of the dividers. They have slots 14; and notches 15 and 16, for receiving fixed and movable bars, and holes 17 through which extends the shaft of the dividers.

In notches 15 is fixed, extending along the width of the loom, a bar 18 which receives the pivots 19 of small fiat levers 20, each carrying two pins 21, 22 on. which are threaded the eyes of the arms 23, 24. of the corresponding gripper. In the notches 16 can slide a bar 27 parallel to bar18; to this bar 27 a cam imparts a longitudinal reciprocating movement and it carries fixed stops 25; in one direction of the movement each of these stops operates a lever 20 to open the gripper. In the movement in the contrary direction a spring '26 (Fig. 3) closes the gripper.

In this construction, by adjusting suitably the stroke of the bar 27 and the tension of the spring 26, each gripper may have independent locking on each pile thread distributed.

The aforesaid oscillation of gripper represented by lines 9 and 10 (Fig. 2) is due to a bar 28 in which are embedded small stirrups 29 embracing each a gripper and held in position by screws 30. This bar is parallel to bars 18 and 27 and like the latter has a longitudinal reciprocating movement due to a cam.

The stirrup 29 serves not only'for moving the gripper but also for adjusting its level so that the centre of the locking of the pile thread corresponds with the centre of distribution. I

In Fig. 3 the ends ofthe two arms of the stirrup embedded in the'bar 28 are seen in plan. The screw which. retains them and permits the aforesaid adjustments is not shewn.

Each divider has a cylindrical spindle 31 adapted to turn in a sleeve 32 which is driven into a transverse bore in the shaft This spindle carries at its end a pinion 33 accommodated in a cavity 34 milled in the shaft 5. This pinion is engaged with a rack 35,

also fitted in the shaftandreceiving a longitudinal reciprocating movement from a cam through a suitable device mounted -00- axially with the shaft and allowing for the OSC1ll2it1OI1-Of the latter on its axis.

The mechanism for rotating the divider is thus placed within the shaft and presents no exterior projection.

The sleeve 32 provides a long bearing for the divider, but it is not essential since the spindle 31 may turn in the bore in the shaft. If sleeves 32 are used the holes 17 in frames 1 3 should be extended by slots 36 for passage of the sleeves in mounting the shaft.

By the construction described, two part hearings on the frames, which are of little thickness, are avoided and the space occupied in the width of the loom is reduced. The dividers can only be mounted when the shaft itself is in place.

The arrangement within the shaft of the mechanisms controlling the rotation of-the dividers constitutes the best construction, for then the gripper can be brought as close as possible to the shaft and there is no projection preventing the arrangement of the gripper tangentially to the shaft; the latter turns normally in the frames without impeding the reciprocation of the rack. This rackis retained merely by small caps placed at suitable distances apart on the shaft, each between two grippers, that is to say, without impeding the function of the grippers.

However, it is not essential that the pinions and the rack should be thus arranged; they might project above the shaft, but this modification would be to the detri ment of the position of the gripper which would have to be inclined at a greater angle to the horizontal; also the bearings of the shaft of the dividers in the frames shewn in Fig. 5 would have to be altered in order to allow the projecting rack to pass.

The notch 37 extending along the whole width of the gripper above the shaft of the divider, permits the lowest possible level for the gripper and its opening and closing mechanism, without injury to its strength and eificient operation.

Having thus described the nature of our said invention and the best means we know of carrying the same into practical effect,

we'claim:

1. In a power loom of the character described, pile thread distributors arranged to permit the free distribution of the threads between them, means including a gripper to distribute the pile thread below each distributor in substantially a horizontal direction, anda warpdivider arranged belowand in the same vertical plane as the gripper and adapted to oscillate in an angular space determined above its axis by the two end positions of the gripper when it seizes the pile and when it has fully extended the latter.

2. Ina power loom as claimed in claim 1, means to reciprocate the grippers comprising a horizontally reciprocating bar, and

stirrups on the bar embracing the gripper.

8. In apower loom as claimed in claim i, an 1 in which each. distributing gripper has two gripping arms on one end, means for opening and closing the arms comprising oscillating levers eccentrically pivoted to said arms, a horizontally reciprocating bar and means on the bar to oscillate said levers.

4:. In a power loom as claimed in claim 3, and in which the means for oscillating the levers comprise pins on the horizontal bar adapted to engage and move the levers in one direction and springs connecting the bar and levers to move the latter in the 0pposite direction during the reciprocations of the bar.

5. In a power loom as claimed inclaim i 1, a bearing shaft for the warp dividers provided with recesses in Which the dividers are rotatably mounted, pinions on the dividers, and a rack reciprocally mountedtin the shaft in mesh with the pinions. v In Witness whereof, We have hereunto signed ournames.

' PIERRE RENARD.

ALBERT RENARD.

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