US791580A - Loom for leno-weaving. - Google Patents

Description

NITED STATES Patented June 6, 1905.

PATENT OFFIcE.

FREDERICK F. ROCHE, OF LINCOLN, RHODE ISLAND, ASSIGNOR TO MAN- VILLE COMPANY, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF NEW JERSEY.

LOOIVI FOR LENO-WEAVING,

SPECIFICATION forming' part of Letters Patent No. 791,580, dated June 6, .1905.

Application filed February 5, 1903. Serial No. 142,034.

To all whom it may'conccrn:

Be it known that I, FREDERICK F..RooHn, of Lincoln, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Looms for Leno-Weaving; and I do hereby declare the following specification, taken in connection with the accompanying drawings, forming a part of the same, to be afull, clear, and exact description thereof.

The present invention relates to looms for weaving leno or gauze fabrics, and has for its object to provide a simple and eflicient'rnechanism for producing fabrics "of this character.

To that end the invention consists inthe com-. bination, with the usual parts of an ordinary loom, ofacombined comb and reed, with mechanism for giving to such combined comb and reed both vertical and lateral movements, whereby both the opening of the shed and the crossing of the threads will be effected by said combined-comb and reed and without the employment of any harness or other additional devices.

Referring to the drawings, Figure l is a front elevation, partly in section, of a portion of a loom with my invention applied thereto. Fig. 2 is a vertical section of the same, and Fig. 3 a detaih A represents the frame of the loom, in which is mounted the main shaft B, provided with fast and loose pulleys a a. The shaft B is provided with the usualcranks b b for operat: ing the lay C through the connecting-links c.

D is the combined comb and reed, which is provided with alternate long dents (Z and short dents d. The-long dents 0Z extend the full width of the reed and are secured at each end to the frame. The short dents 01 extend about one-half the widthof the reed and are secured 1 These to the frame only at their lower ends.

cam-shaft E is provided with two cams c c for giving to the combined comb and reed its vertical or up-and-down movements and with a third cam e for giving to the combined comb and reed its lateral or to-and-fro movements. Two treadles or levers ff are pivoted to the frame and arranged to beactuated by the cams e 6', respectively. In practice the treadles or levers ff are usually arranged to underlie the cams c 6, respectively; but for convenience in the drawings each of the treadles is shown as providedv with an offset or projection carrying the roller f to be acted upon by the cam. As the cam-shaft E makes only one revolution for every two revolutions of the shaft B, each of the cams e c has two cam projections, the cam a being provided with the camprojections e e and the cam a being provided with the cam projections e a. One of'the treadles, f, is connected. by means of the cord g,-jack 7t, and cords i, with the lower side of the combined comb and reed, and the other treadle, f, is connected, by means of the cord 9, jack 7t; and cords 11, with the upper side of the combined comb and reed, the cords a" passing over suitable pulleys 2' 2' on the frame. The arrangement of these parts is such that when one of the treadles is depressed by its cam the combined comb and reed will be raised, and when the other treadle is depressed by its cam the combined comb and reed will be lowered.

Pivoted to the frameA'is a lever j, which is arranged to overlie the cam e and is provided with a pin or projection which enters a cam-groove e formed in said cam. Secured to the combined comb and reed and depending therefrom is'an arm lawhich is forked at its lower end, so as to embrace the free end of thelever j, so that the movement of said lever willbe impartedto-the combined comb and reed. As the cam-shaft E revolves the lever j is moved backand forth by the cam 0 thereby giving to the combined comb and reed its lateral or to -and-fro movement. The slot in the forked end of the arm Z0 permits the proper vertical movements of the combined comb and reed, while maintaining 25 across the threads Z.

45 or other similar devices.

an operative connection between the lever and arm.

As shown in the drawings, the warp-threads Z Z are led from the warp roll m over the 5 Whip-roll a and pass directly from the whiproll to the combined comb and reed and thence pass directly through the reed of the lay to the fabric. One set of the war p-threads, as Z, are passed through the eyes (Z of the short dents of the combined comb and reed,

and the other set of warp-threads, as Z, are passed between the long dents and the short dents, as shown.

The operation is as follows: At the first pick the combined comb and reed is raised to open the shed, as shown in Fig. 2. After the shuttle has crossed to lay the weft-thread the combined comb and reed is depressed, and when the upper ends of the short dents have been brought below the warp-threads Z will be crossed back of the weft-thread, thereby producing the leno or gauze weave. After the next weft-thread has been laid the combined comb and reed is again depressed, then moved laterally in the opposite direction to effect another crossing of the threads Z and Z,

and then raised to open the shed for the next pick, and so on. It will be seen that the opening of the shed for the next pick, as well as the crossing of the threads, is performed 4 solely by the combined comb and reed and that no harness or other devices are required for the purpose, the cross-Weaving being ontirely performed by the combined comb and reed Without the cooperation of any harness It will also be noted that as no harness is employed or required the shed opens clear back to the whip-roll and that by reason of this long shed no easerroll is required.

What I claim as my invention, and desire to secure by Letters Patent. is

1. In a loom, the combination, with the operating mechanism, of a combined comb and reed comprising long dents and short dents, the short dents being provided with eyes to receive one set of the warp-threzuls, and means forgiving to said combined comb and reed both a vertical and a lateral movement at each pick, substantially as described.

2. In a loom, the combination, with the operating mechanism, of a combined comb aml reed connin'ising long dents and short dents, the short dents being provided with eyes to receive one set of the war 'i-thrcads, and means for giving to said combined comb and reed a lateral movement to cross the warp-thremls, and then an upward movement to open the shed for the next pick and so on successively at each pick, substantially as described.

3. In a loom, the combination, with the opcratingmechanism, of a whip-roll, a combined comb and reed comprising long dents and short dents, the short dents being provided with eyes to receive one set of the warpthreads, said warp-threads being led directly from the whip-roll to the eyes in said dents, and means for giving to said combined comb and reed both vertical and lateral movements at each pick, substantially as described.

4. In a loom, the combination, with the cam-shaft provided with cams, of a combined comb and reed comprising long dents and short dents, the short dents being provided with eyes to receive one set of the warpthreads, and connections between said camshaft and combined comb and reed forgiving to said combined comb and reed both vertical and lateral movements at each pick, substantially as described.

FREDERICK F. ROCHE.

\Vitncsses:

\Y. H. THURSTON, J. H. .lHURs'roN.

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