US2681664A - Apparatus for inserting filling yarns in circular looms - Google Patents

Description

June 22, 1 JUAN PUIGCORBE MARIN APPARATUS FOR INSERTING FILLING YARNS IN CIRCULAR LOOMS 2 SheetsSheet 1 Filed Jan. 22, 1952 INVENTQR. JUAN Pu|acor25 MARIN June 1954 JUAN PUIGCORBE MARIN 2,681,664

APPARATUS FOR INSERTING FILLING YARNS IN CIRCULAR LOOMS Filed Jan. 22, 1952 2 Sheets-Sheet 2 I' II I| I. F 22 20 IN V EN TOR 5 Jab JUAN ulecoRss MAR/N BY nrroramsxs FIG. 3

Patented June 22, 1954 UNI-TED STATE ENTL] OFFICE,

APPARATUS FOR INSERTING FILLING YARNS IN OIRCFJLAR LOOMS Juan Puigcorb Marin, Barcelona; Spain,

ApplicationJanuary 22, 1952, SerialNo. 267,597

3 Claims.

This invention relates to circular, weaving looms and has particular relation to a new and improved mechanism for inserting filling yarns in circular looms.

It is an object of the invention to provide a circular loom having'mechanism ,for inserting filling yarns, which is characterized by-a plurality of shuttles, operating simultaneously and successively, so that the productive capacity of the loom is increasedconsiderably.

Another object of theinvention is the provision of a circular .loom of the character described which aiiords efficiency and dependability of operation to a degree heretofore unobtainable in looms of this type.

The mechanism consists of a circular operating device which transmits a rotary-motion to a plu,-,

rality of satellite pinions locatedperipherally and distributed uniformly around said device, which pinions transmit the movement received from said driving device to arcuate shuttleswhich,

carry one or more bobbins and are guided, in a circular path around the operating device when the pinionsare rotated passing through the sheds formed at the proper time in each of the multiple sectionsinto which the warp of the loom is annularly divided.

The circular ,operating device which transmits the general motionto .therotary-pinions may be a gear or crown gear;-a chain, a perforated belt or the like.

Other objects and advantages .of the invention will be apparentinthe courseof the following;

specification. whentaken, in .connection with the accompanying drawings whichrillustrate a preferred embodiment by'way of illustration only and not in a limiting sense.

Fig. 1 is a plan view partially in section, of a portion of a loom showing one of the shuttles and the mechanism for driving the shuttle.

Fig. 2 is a vertical section taken substantially along line 22 of Fig. 1.

Fig. 3 is a perspective view of the shuttle and mechanism of Figs. 1 and 2, as seen from the outside of the loom, with portions broken away to reveal internal construction.

The mechanism includes an annular rack I having a continuous row of teeth 2 around its inner periphery. These teeth 2 mesh with the teeth of one or more pinions, such as the pinion 3 which is mounted on a shaft 4. The shaft 4 is rotated by suitable driving mechanism (not shown) of the machine whereby the pinion 3 rotates the rack I. In rotating, the rack I rests upon a fixed circular support 5 which has a plurality of spaced, upstanding, circular guide rails l which interfit with corresponding depending circular guide-rails 8 oftherack I, for guiding said rack I for rotation in a circular path. The support 5 is immovable, being secured by keying 6 to a fixed central column II I which is rigid with the machine frame.

The rack i is provided with a continuous row of teeth I 2 around its outer periphery which meshes with the teeth of a plurality of satellite pinions I3 for uniform rotation of said pinions i3 when the rack is rotated. The pinions-13 are spaced from each other, and each 'is supported by a depending pivot I 4 which is mounted in a vertical bearing l5;

The pinions l3 engage withthe teeth IB of flat arcuate shuttles is which are spaced radially from theouter periphery of the rack I, as shown in Fig. 3. The shuttles 15 have opposedpointed ends I! which perform the shuttle operation. Each shuttle H5 has an arcuate guide rail if! on its top and bottom surface, which guide rails are alined and positioned to fit'within corresponding arcuate grooves formed in respective spaced support blocks 22 and 23. The'support blocks 22 are integral with an angular annular member 20 and extend radially therefrom, while the blocks 23 are integral with a similar angular annular member 2|, and extendradially from said annular member 20. The annular members 20 and 21 are rigidly fixed to respective supports 5 and 9 as by means of screws 24 and 25. Thesupport 9 is in turn rigidly and immovably mounted on the central column H as by keying J0. Each lower block 22 supports the bearing [5 of one of the pinions l3. Each pinion I3 .is thus .ro-- tatably mounted between a pair of verticallyalined blocks 22 and 23.

Each shuttle l6 carries one or more bobbins; such as the bobbin 26, which depends therefrom and is so inclined that its longitudinal axis coincides with the axis of the shed formed in the warp yarns a and b. When a shuttle is pro vided with more than one bobbin, the end of the yarn of one bobbin must be connected to the beginning of the yarn wound on the next bobbin. As the yarn 21 is unwound from bobbin 26, it is conducted through a yarn guide 28 to its point of insertion 29 from which it is inserted between the angle of the shed formed between the yarns a and b.

In order to allow the insertion of the filling yarns, the shed must be opened by a suitable set of heddles which are not shown, but whose manner of operation and location at or near the top of the machine will be familiar to those 'skilled in the art. Upon the formation of the shed some of the warp yarns b must be suitably held by their heddles in a vertical position between the outer peripheral edges of the fixed annular members 28 and 2! and the inner toothed edge of the shuttles It, as shown in the drawings. The remaining warp yarns a are held by their corresponding heddles inclined outwardly beyond the outer arcuate edges of the shuttles H5. The warp yarns bin the vicinity of each of the revolving shuttles I6, are located within the spaces between the pairs of alined blocks 22 and '23, as clearly shown in Figs. 1 and 3, so that they are divided into annular sections spaced by said pairs of blocks 22 and 23, in order to permit the traversal of the shuttles 16 in mesh with the pinions l3.

After a particular shuttle [6 has passed a pinion l3 and left its filling 21, the shed behind this pinion I3 is momentarily left free and unobstructed until the arrival of the next shuttlev During this time, the warp yarns are recrossed by their heddles to form a new shed, so that all or part of the yarns a take the position formerly occupied by yarns b and all or part of the yarns I) take the position formerly occupied by yarns a. An unobstructed path through the newly-formed shed is thus provided by the heddles for the next approaching shuttle is.

As can be noted from the drawings, the pinions 13 are spaced apart a sufficiently close distance to enable each shuttle [6 to be in constant mesh with at least two of the pinions l 3, so that each shuttle is also always guided by at least two pairs of alined support blocks 22 and 23.

Since a considerable number of shuttles it may be provided to operate simultaneously in a single machine, it is possible to increase the productive capacity of a loom to a substantial extent.

While a preferred embodiment of the invention has been shown and described herein, it is obvious that numerous changes, omissions, and additions may be made without departing from the spirit and scope thereof. For example, instead of the guide rails 19, any suitable equivalent guide means may be used to guide the shuttle in a circular path. Again the transmission of motion from the pinions 13 to the shuttles 16 can be eifected by the engagement of the teeth of said pinions with teeth arranged on any suitable portion of said shuttles.

What is claimed is:

1. In a circular loom which has a frame and movable heddles for forming sheds in warp yarns carried by said frame, a mechanism for inserting filler yarns in said sheds, said mechanism comprising a circular rack extending entirely around said frame and having teeth on the outer rim thereof, and mounted for rotary movement relative to said frame, drive means located centrally in said frame for rotating said rack, said frame having radial extensions extending outwardly of said rack and divided into vertically aligned and spaced pairs, said pairs of frame extensions being circumferentially spaced around said frame, a pinion mounted between each said pair of frame extensions and meshing with the teeth of said rack, said frame extensions having track means therein outwardly of said pinions, a shuttle mounted in said track means for movement about the circumference of said rack between the pairs of frame extensions, said shuttle having inner teeth which mesh with the teeth of said pinions, and a bobbin for filler yarns carried by said shuttle, whereby said shuttle is adapted to be driven around the circumference of said rack to lay a filler yarn within said sheds.

2. A mechanism in accordance with claim 1 in which the warp yarns comprising said shed are divided into an inner group and an outer group, said inner group being located between said circular rack and the path of said shuttle and being divided annularly by said frame extensions, said outer group being located outwardly of the path of said shuttle and also outwardly of said frame extensions, said bobbin depending substantially vertically from said shuttle, said shuttle also carrying thread guiding means having an outlet opening adjacent the bottom of said shed, whereby a filler thread carried by said bobbin is adapted to be drawn through said outlet opening and laid substantially at the bottom of said shed upon movement of said shuttle.

3. A mechanism in accordance with claim 2, in which said thread guiding means has an outlet portion in which said outlet opening is located, said outlet portion being thin and flat, whereby it is adapted to fit slidably in the bottom of said shed.

References Cited in the file of this patent UNITED STATES PATENTS Number a Name Date 203,183 Morris Apr. 30, 1878 908,161 Smith Dec. 29, 1908 1,683,385 Frederickson Sept. 4, 1928 1,822,292 Jabouley Sept. 8, 1931 2,035,208 Villa et al Mar. 24, 1936 2,042,703 Dreyfus et al June 2, 1936 2,483,118 Ancet Sept.- 27, 1949 FOREIGN PATENTS Number Country Date 256,817 Switzerland Mar. 16, 1949

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