US1990028A - Braiding machine - Google Patents

Description

Feb. 5, 1935. v

G. HORN BRAIDING MACHINE Filed July 8, 1932 2 Sheets-Sheet 1 enema F b. 5. i935" PATENT former.

I ammo Guido Horn, Berlin-Weluonsee, Germany Ootobet so. 1931 Application July a, 1932, Serial him 621,363

5 with loops projecting therefrom on a braiding machine of any suitable type. To this end I pro- .5- =equipped with twovappliances for supplying .sup-

vide means for supplying a supplementary thread to the point where the normal threads are braided.

For various purposes, for instance in the manui'acture' of carpets, turkish towelling and the like, it is desirable that threads, and more particularly the weft threads, should be cords with loops. Such cords may also be used for knitted and hosiery goods, for needle work and the like. It has already been suggested to manufacture on covering and. twisting machines chenille=like cords in which several threads form loops. 1 According to the present invention such cords are obtained conveniently in the form of round braids with one or more rows of interlaced loops projecting frond the cordsto various lengths.

Any number of appliances for supplying the extra or supplementary thread may be provided and preferably means are combined with the said appliances for varying the velocity, at which the supplementary thread is supplied to the braiding point. Variation of the velocity results in a corresponding variation of the length of the loops. The loops. are formed as the supplementary threads aredirected to the points of intersection. of the braiding threads, which points are grouped about the braidin point, and the supplementary threads are engaged by, and interlaced with, the braiding threads.

Preferably, warp stop motions are provided to be controlled by the supplementary thread so that the machine will be arrested if the supplementary thread breaks or its bobbin becomes exhausted.

' Any number of appliances for supplying supplementary threads may be provided. inthe machine which will be described, eight threads are braided and it has'two appliances for supplying supplementary threads to two diametrically opposite intersect points of the braiding threads. The number oi appliances for supplying supplementary threadsto be provided is determined by the closeness of the loops. If the machine referred to had four appliances for supplying supplementaw threads instead of two the number of loops per-unit of length in the braid would obviously be duplicated.

In the drawings aflixed to this specification and forming part thereof a braiding machine plementary threads embodying m invention is illustrated diagrammatically by way of examp e.

Inthe drawings Fig.1 is an axial section showing a portion or the braiding machine and one of its interlacing appliances,

.Fig. 2 is a partial plan view of the machine,

and

Fig. 3 is an elevation showing the relative position of the threads at the braiding point, drawn to a, larger scale.

. Referring now to the drawings, 1 is a stationary standard in the form of a tubular shaft, 2 is a sleeve which is rotatably mounted on the standard, and '3 is a driving shaft with a bevel pinion 4 in mesh with a bevel gear 5 at the lower end of the sleeve 2. 6 is the lower table which may be cast integral with the-sleeve 2, as shown, and 7 is the upper table whose tubular boss 8 is mounted to rotate at the upper end of the stand ard l. Rotation in opposite directions is imparted to the upper and lower tables by any'suitable means which have not been shown. Sets of bobbins 9 and 10 are mounted to rotate in suitable carriers on the upper and lower tables, respectively. In the present instance, it has been assumed that the machine has eight bobbins in all and two appliances for supplying supplementary threads.

The braiding threads 11 from the bobbins 9 and 10 are brought to the braiding point 12 by the usual means. The threads from the four upper bobbins 9 are taken to the braiding point directly and the threads from the four. lower bobbins 10 are taken through the hollow shaft 13 of rotary thread-guide carriers in the form of bevel gears iii, with thread guides 15. Rotation is imparted to the carriers 13 by an angular stationary bevel gear 16 which is attached to a stationary member 45 of the frame so that the carriers or bevel gears is rotate as they are carried 12 at its upper end. 21 is a spur pinion which is mounted to rotate on a shaft 22 at the lower end of the bracket 20 and meshes with a spur gear 23 which is connected to, or integral with, the

sheave 18. Rotation is imparted to the shaft by any suitable means, not shown. Mounted on the shaft of pinion 21 is a member 24 which in the example illustrated is a rope sheave but might also be a belt pulley or a sprocket, as desired. 25 is a rope on the sheave 24. 26 is an arm, or a pair of arms, which is secured to the upper end of bracket 20 at one end, and 27 is the frame of the appliance which supplies the supplementary threads and is arranged at the other end of. the

arm, or arms, 26. 28 is the bobbin for the supplementary thread 29 which is mounted to rotate at the outer end of the frame 2'7. 30 is a shaft which is mounted to rotate at the inner end of the frame 27, and 31 is a rope sheave-on the shaft 30 which is connected to the sheave 24 on the pinion shaft 22 by the rope 25. Mounted on the shaft 30 is a take-off cylinder 32 for the supplementary thread 29. The thread is engaged between the cylinder 32 and an upper cylinder 33 which is mounted on the end of a rocking arm 34. The rocking arm is pivoted to the arm, or arms, 26 at 35 and applied to the lower cylinder 32 by a spring 36, one end of which is attached to the arm 34, while its other end is attached to the arm 26, or one of the arms. 37 is a trough-shaped guide which is secured to the arm, or arms, 26 at its outer end, with its inner end extending into the vicinity of the braiding point 12.

The sheaves or other members 24 and 31 are preferably designed as cone pulleys, as shown in Fig. 2, so that various velocities may be imparted to thetake-off cylinder 32. v

Mechanical or other warp stop motions of any suitable type may be provided for operation by the supplementary thread 29. By way of example an electric warp stop motion is illustrated in Fig. 1. 38 is an electrically conducting arm which is pivoted to the frame 27 at 39 and connected to one terminal of a source of electric energy, and 40 is a fixed contacting member, also-on the frame 2'7, which is connected to the other terminal and adapted to be engaged by the arm 38 when the thread 29 breaks. A circuit is closed if the members 38 and 40 are not held apart by thethread 29, not only if the thread breaks but also if it becomes exhausted. The circuit and the means controlled by the circuit for cutting out the driving'mechanism of the machine may be of any suitable type and are not illustrated.

' It has been assumed that the machine illustrated by way of example has two appliances for supplying supplementary threads, each with a guide 37. Only one of the appliances is illustrated in Fig. 1.

Referring now to Fig. 3,the eight braiding threads 11 rotate with their respective tables 6 and 7. The direction of rotation is indicated by arrows in Fig. 2, the threads which rotate clockwise being marked 11a and those which rotate anti-clockwise being marked 11b. The braiding threads are interlaced in the usual manner and intersect at four points at some distance from the braiding point 12. The supplementary threads 29 are positively carried into the vicinity of the braiding point in such a manner that each of these threads hangs in the form of a loop. These loops are engaged by the braiding threads 11 at their points of intersection, in the present instance at two points which are diametrally opposite. As the braiding threads delivered by the bobbins 10 and carried by the guides 15 are led over one and under the other braiding thread delivered by successive bobbins 9, the supplementary threads are entrained alternately in opposite directions by the braiding threads and as thepoints of intersection where the threads 29 are interlaced with the braiding threads, are at a certain distance from the braiding point 12, loops 41 are formedfrom the supplementary threads which project from the finished braid 17 as shown in Fig. 1. The braid is taken off at the rate at which it is finished at the braiding point 12 by the sheave 18 in the usual manner.

By varying the ratio at which the shaft 30 is rotated from the shaft 22 (for which purpose the respective pulleys are designed as 0011f pulleys, Fig. 2) the length of supplementary thread 29 supplied per unit of time may be varied as desired. The more supplementary thread supplied per unit of time, the larger will be the loops 41, and vice versa.

As mentioned, any number of appliances for delivering supplementary threads may be provided.

In the machine illustrated, with eight braiding the loops 41 would become more crowded in the finished braid.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.

In the claims affixed to this specification no selection of any particular modification of the invention is intended to the exclusion of other modifications thereof and the right to subsequently make claim to any modification not covered by these claims is expressly reserved.

I claim:

1. In combination with a braiding machine, means for supplying braiding threads and means for positively delivering supplementary threads above the braiding threads in a plane extending parallelly to the braiding axis and in such excess, that said supplementary threads hang down sumciently to be caught by the crossing braiding threads and carried into the braiding point.

2. In combination with a braiding machine,

means for supplying braiding threads, means for positively delivering supplementary threads above the braiding threads in a plane extending parallelly to the braiding axis and in such excess, that said supplementary threads hang down sufliciently to be caught by the crossing braiding threads and carried into the braiding point, and means for varying the speed at which said supplementary threads are delivered.

3. In combination with a braiding machine, means for supplying braiding threads, appliances for delivering supplementary threads above the braiding threads, each of said appliances comprising a-frame, means on said frame for supporting a supply of supplementary threads, means also on said frame for drawing off said supplementary threads from said supply in an excess suflicient to hang down between said braiding threads, and means for directing said supplementary threads to a plane extending parallelly to the braiding axis, so that said supplementary threads are caught by the crossing braiding threads and carried into the braiding point.

4. In combination with a braiding machine, means for supplying braiding threads, appliances for delivering supplementary threads above the braiding threads, each of said appliances comprising a frame, means on said frame for supporting a supply of supplementary threads, co- 7 5 operating cylinders on said frame for drawing oi! point, for directing said supplementary threads said supply in an excess suflicient to hang down to a plane extending parallelly to the braiding between said braiding threads,-and means, inaxis, so that said supplementary threads are eluding cone pulleys surrounded by a belt, for caught by the crossing braiding threads and carrotating said cylinders with variable speeds, and ried into the braiding point.

a trough-shaped guide, connected to said frame GUIDO HORN.

and extendinginto the vicinity of the braiding

Images