US2681079A - Return movement device for weaving loom heddle frames - Google Patents

Description

June 15, 1954 J. PICANOL 2,631,079

RETURN MOVEMENT DEVICE FOR WEAVING LOOM HEDDLE-FRAMES Filed Sept. 27, 1951 3 Sheets-Sheet l /V 0 Jain 25 15420! %%sys J. PICANOL June 15, 1954 RETURN MOVEMENT DEVICE FOR WEAVING LOOM HEDDLE-FRAMES Filed Sept. 27, 1951 3 Sheets-Sheet 2 ANN Ja W

June 15, 1954 p c o 2,681,079

RETURN MOVEMENT DEVICE FOR WEAVING LOOM HEDDLE-FRAMES Filed Sept. 27, 1951 3 Sheets-Sheet 5 llY/[WIOR Jaime Pica/206 Patented June 15, 1954 RETURN MOVEMENT DEVICE FOR WEAVING LOOM HEDDLE FRAMES Jaime Picanol, Zandberg, Zillebcke-lez-Ypres, Belgium Application September 27, 1951, Serial No. 248,612

1 Claim.

The present invention relates to a return device for the drive of the heddle-irames in weaving looms in which the heddle-frames, animated by a vertical alternative movement, are positively displaced in one direction by a driving mechanism and are urged back in the reverse direction by an elastic device. Different systems with spring action have been used as elastic devices, these were placed at the top or at the bottom of the loom, according to the nature and the position of the driving mechanism.

The invention relates to a device of the type using spiral springs which urge the heddleframes upwardly from their lower to their upper position.

The device, according to the invention, is char acterised by the fact that each heddle-frame is placed between a single driving lever situated underneath said heddle-irame to actuate the latter downwardly and a return movement device which has two independent supports fixed above each of the lateral frames of the loom and mountin a spiral spring and a guiding pulley respectively, for each heddle-frame. end of said spiral spring is fixed with relation to its support and the external part of said spring is provided with a pair of flexible belts urging the heddle-frame upwardly. One of said belts is hooked directly to one of the upper corners of the heddle-frame, and the other belt is trained over said guiding pulley to be hooked over to the other upper corner of the heddleframe.

The return springs for the even numbered heddle-frames are situated at one side of the loom and the return-springs for the uneven numbered heddle-frames are situated at the other side of the loom. On the other hand, the guiding pulleys for the uneven numbered heddleframes are situated on the first mentioned side of the loom and the guiding pulleys for the even numbered heddle-frames are disposed on the last mentioned side of the loom. Each heddleframe is urged upwardly by one single spiral spring and downwardly by one single driving lever.

In this manner, the frame of the loom may be substantially modified as compared to the con ventional embodiments and the archivolt or upper cross-beam, which normally extends above the loom and is particularly cumbersome, is no longer necessary. Thus, with the use of the device, accordin to the present invention, .the upper part of the loom becomes substantially free of obstructions and this highly increases the The inner visibility in the weaving rooms allowing better supervision and better illumination of the loom.

A preferred embodiment according to the invention is described, as an example, hereafter with reference to the accompanying drawings, in which:

Figure 1 is a schematic View of the device ac cording to the present invention;

Figure 2 is an elevation view of the essential elements of this device.

Figure 3 is a plan view of the device shown in Figure 2; and

Figure 4 is a general perspective View of a weaving loom provided with the device according to the present invention.

The device, according to the invention, comprises essentially a heddle-frame I of conventional type interposed between a single operating lever 2 for positively displacing said heddleframe downwardly through the intermediary of its lower cross-bar 3 which is hooked to the heddle-frame by the hooks i, 5 and at least one spiral spring 6 housed in drum 1; one of the ends of said spiral spring is directly or indirectly extended by flexible links consisting of tapes or belts 8, 9. The belt 8 is directly fixed to the adjacent upper corner of the heddle-frame l and the belt 9 is trained over an intermediary pulley l0 and is fixed to the other upper corner of said heddle-frame I.

In the embodiment of Figures 2 and 3, we find these various elements; the drums I and 1 house the spiral springs 6 and 6 respectively and the intermediary pulleys l9 and It are mounted at the extremity of brackets H and H respectively thereby forming an arrangement which permits the complete clearing of the upper medium part of the loom. In this case, the drum 1 is rotatably mounted on the upper extremity of a bracket H resting directly, through its base I2, on the frame l3 of the loom. This bracket extends in a manner to correctly position the drum '1 so that the latter lies practically in the plane of the associated heddle-frame. The belt 8 is secured to the drum 1 at one end and is directly hooked to the upper edge of the heddle-frame i at the other end so as to remain substantially vertical during the different up-and-down movements of the heddle-frame. The intermediary pulley ii! is rotatably mounted at one end of an arm id depending from the bracket H and is adapted to support the belt 9, so that the portion of the latter comprised between said pulley and the heddle-frame I will also remain substantially vertical during the up-and-down movements of 3 the heddle-frame. The bracket II with its depending arm 14 is placed on one side of the heddle-frames while the bracket H with its depending arm it is placed on the other side of the heddle-frames, so that all the spiral springs S of the even numbered heddle-frames such as the heddle-frame I and the intermediary pulleys H) of the uneven numbered heddleframes such as the heddle-frame l are disposed on one side of the loom while the springs 6 of the uneven numbered heddle-frames l together with the pulleys Ii) of the even numbered heddle-frames l are disposed on the other side of the loom. In this manner a perfectly balanced distribution of the elements of the device is obtained and the occupied space is reduced to a minimum. All the spiral springs and the drums of the even numbered heddle-franies are mounted on the same bracket, whereas all the spiral springs and the drums of the uneven numbered heddle-frames are mounted on the opposite bracket. The intermediate pulleys ill of the even numbered heddleframes are disposed on a common shaft mounted on an arm it and similarly, all the intermediate pulleys ii of the uneven numbered heoldle-frames are disposed on another shaft mounted on the opposite arm I4. In other words, one heddle-frame i of each pair of heddle-frames i and I is connected to a drum 1 disposed on one side of the loom while the other heddle-frame i of each pair of heddleframes I and I is connected to a drum mounted on the other side of the loom. Due to the fact that the plurality of drums l mounted on a common shaft are connected to every second heddle-frame, the successive heddle-frames may be disposed very close to each other and thus no room is wasted. The same holds true for the drums l on the other side of the loom and for the pulleys Hi and i0.

By means of this arrangement, each heddleframe is positively driven downwardly by a single operating lever disposed at the lower part of the loom, and is pulled back upwardly by the two belts by which it is suspended, these belts being urged by the same spiral spring. The upper medium part of the loom remains practically free of obstruction allowing a better illumination of the loom and a better visibility of the rear part of the same.

It will be possible to make various modifications to the device of the present invention depending more particularly on the means used for the positive drive by a single lever without departing from the spirit and scope of the ap pended claim.

I claim:

In a return movement device for a plurality of pairs of heddle-frames in a weaving loom, a pair of support brackets mounted on said loom and each extending above one end of said pairs of heddle-frames, a first series of drums rotatably mounted at the upper end of one of said brackets and in vertical alignment with one heddle-frame of said pairs of heddle-frames respectively, a second series of drums mounted on the upper end of the other of said brackets and respectively in vertical alignment with the other heddleframe of said pairs of heddle-frames, a spiral spring housed within each drum and urging the said drum to rotate, a pair or" flexible links for each drum trained over the same and attached at one end to said drum, an arm depending from each of said brackets, a plurality of pulleys rotatably mounted on each of said arms, said pulleys being respectively in alignment with the drums mounted on the opposite brackets, one link of each pair of links being connected to one upper corner of the aligned heddledrame and the other link of each of said pair of links being trained over an aligned pulley and attached to the other corner of said aligned heddle-irame.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 729,190 Knox May 25, 1903 2,455,263 Nichols Nov. 39, 1948 2,501,157 Brown et al Mar. 21, 1950 2,557,033 Lake June 12, 1951

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