US1239792A - Warp stop-motion for looms. - Google Patents

Description

S. S. JACKSON.

WARP STOP MOTION FOR LOOMS;

APPLICATION FILED MAR. 13. 1915.

Wa'tneases; I lizvenior @flCa/i 1. 1M 5 went 0% .am im My W cfli'orney.

STATES PATENT OFFTOE,

SIMEON' S. JACKSON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE STAFFORD COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATIONOF NEW JERSEY.

WARP STOP-1VOTION non LOOIVIS.

Specification of Letters Patent.

Patented Sept. Jlfl, 1917.

To all whom it may concern a subject of Great Britain, residing at Readville, Boston, in the county of Suffolk, State of Massachusetts, haveinvented a certain new and useful Improvementin Warp Stop- Motions for Looms, of which the following is a specification, reference being had therein to the accompanyingdrawmgs.

My invention is designed more particularly for employment in connection with fine warps having. a considerable number of ends to the inch. One general object of the invention isto provide for splitting the warp-threads, i. e. separating them from union with one another, and to prevent them from either remaining united to one another or becoming joined or knit together in their progress through the loom." By accompl1shing this objectI eliminate chafing and wear of the warp-threads, and greatly reduce the number of breakages thereof. Another object is to render the individual warp threads readily traceable back to the dropwires, so as'to enable repairs to the warpthreads to be effected easily. Other objects are to reduce crowding. at the dropwires and thereby reduce chafing, and to facilitate access to the drop-wires and Warp threads.

An embodiment of the invention is illus trated in the drawings, in which latter,

Figure 1 is a view showing certain portions of a loom in section in a vertical plane extending from front to rear in the loom, with the said embodiment applied thereto. F 2 is aplan view of the parts that are shown in Fig. 1.

Having reference to the drawings,-

A portion of the breast-beam of a loom is shown at 1, and a portion of the lay-beam at 2. A portion of one lay-sword is shown at 3, Fig. l. The reed carried by the lay is indicated at 4L, Fig. 1, the lay-cap or handrail beingmarked 4 and Fig. 1 shows a shuttle 5 upon the lay-beam. Harnessframes are shownat 6, 6*, 6 6. Warp threads (4, a a 0?, are shown extending from the rear of the 100m through the eyes of the heddles mounted in said harness;- frames, and through the dents of the reed 4, to the fell, where they are united in the web 7 produced by the combination of the warp-threads with the weft-thread which is interwoven therewith by means of the shuttle 5.

The drop- wires 8, 8, of the warp-stopmotion are hung uponthe warp-threads between two transversely-extending rods 9, 9", and in this instance the said drop-wires are disposed in two banks which are guided by their guide- bars 10, 10. The rear dropwires, 8, are hung upon warp-threads eX- tending over both of the said rods. The front clrop-wires, 8, are hung upon warpthreads which pass over the rear rod 9, and under the front rod, 9 At 11 is a warprest located between the two banks of dropwires and below the warps. Those por tions of theawarp-stop-motion which coiiperate with the drop-wires in indicating the breaking. or excessive slaekness of the individual warp-threads, and in bringing about the arrest of the working of the loom, are not shown. They may be of any approved character.

In carrying my invention into effect. the entire series of warp-threads is arranged to pass over the rear (right-hand) rod 9, and to rest thereon. One half of thewarpthreads of the saidseries pass over the front (left-hand) rod, 9 and the other half below the same. In arranging the threads over and under the front rod 9 they are disposed two by two. That is to say, two threads are disposed above the said'rod 9 the next two below the same, the next two above the same, the next two below, and so 011 alternately. The warp-threads also are drawn two by two through the drop-wires of the two banks. That is to say, two threads whichlie side by side at the same side of the front rod 9 respectively are drawn through two drop-wires located side by side in one bank.

The warp-threads which are drawn two by two through adjoining pairs of the dropwires as just explained, and are disposed in alternating pairs located above and below the left-hand rod 9 are drawn through the heddle-eyes of the harnessframes in an on der which splits and separates from each other the individual threads composing every pair of warp-threads. Thus, one thread of each pair is drawn through a heddle-eye of a harness-frame pertaining to one of the planes of the shed that is formed for the receptlon of the weftthreads, while the other warpthread of.

front rod 9 extend forward to the harness I.

frames along different lines, at all times except when the harness-frames are exactly even. In addition, the individual warpthreads are readily traceable back to the drop-wires, so that repairs to the threads are easily effected, and the grouping of the drop-Wires reduces crowding and chafing, and facilitates access to the drop-wires and warp-threads. These are the particular obj ects of the invention. In the drawings four harness-frames are shown. It is to be understood that in practice they are coupled or connected together to work in pairs for plainweaving. The warp-threads are drawn in 1, 3, 2, 4:; 1, 3, 2, a order through the heedle-eyes of the said harness-frames. It will be observed that one warp-thread, a, of a given pair of warp threads, passes from the bottom of the left-hand rod 9, to a heddle-eye of the first harness-frame, 6, counting from the rear of the loom, while the adjoining thread, a of the same pair passes from the bottom of the said rod through a heddle-eye of the third harnessframe, 6', also counting from the rear. These two threads, therefore, are caused to form parts of the opposite planes of the shed represented in Fig. 1, and when the shed is open they diverge from each other from the rod 9 forward. It will also be observed that one thread, (4 from the top of the left-hand rod 9 passes through a heddle-eye of the second harness-frame, 6 counting from therear, while the adjacent thread, 65*, of the same pair passes from the top of the said rod 9" through a heddleeye of the fourth or front harnessframe, 6, so that the two threads of this pair form parts of the opposite planes of the open shed. Thus, between the left-hand rod 9'" and the harness-frames the warp -threads are divided into four planes instead of remaining either in a single plane or in two planes as heretofore usual. In the case of the shed-formation that is represented in Fig. 1, the threads a which pass from the under side of the left-hand rod 9 to the third harness-frame, 6 counting from the rear, and the threads a that pass from the top side of the said rod to the second harness-frame, 6, also counting from the rear, cross one another in front of the said rod, and between the latter and the harness frames. When the shed-formation is reversed, the threads 64, a become unerossed and the threads a, a become crossed.

The illustrated arrangement has the advantage, further, that in applying the warps, harnesses, etc., to the loom the division of the threads to separate them for the application of the left-hand rod 9 in the relations shown in Figs. 1 and 2 is readily effected, simply by depressing the first and third harness-frames and raising the second and fourth. This separates the threads in pairs, as required accordance with the invention. In case only :two har-' ness-frames, working. oppositely, should be employed, with the threads 61-, a, passing through the eyes of the heddles of one of the said frames, and the threads (4 a passing through the eyes of the hecldles of the other frame, the division of the warp-l threads into pairs for the insertion of the rod 9 may be effected by other methods known toweavers. More than two harness L i frames may be grouped-together to move in unison, in which case the warp-threads will be divided into more than four sets or series and the order of drawing-in through the eyes of the hecldles of the different harnessframes will be correspondingly modified, but the general arrangement of the warp threads in front of rod 9 willapproximate that represented in thepresent drawings. I claim as my invention 1. In combination, atransverse warp-support for the warp-threads in a loom,a leaserod in advance of said warp-support by which the warp-threads passing over said warp-support in a single plane are divided by alter- 1 nating groups into two planes, one whereof passes over the said lease-rod and the other. below the same, a bank of drop-wires hung iipon alternatingwarp-threads adjacent the warpsupport, a second bank of drop-wires hung upon the remaining warp-threads in the lower plane of warp-threads adjacent the said lease-rod, and oppositely-working harness-frames pertaining to opposite planes of a shed, said harness -frames having the threads composing each of the said groups drawn in alternating order through the heddle-eyes of the respective harness-frames so as to bedivided between the said opposite shed-planes.

2. In combination, a transverse warp-support for the warp-threads ina loom, a leaserod in advance of said warp-support by. which the warp-threads passing over said warp-support in a single plane are divided by pairs into two planes, one whereof passes over the said lease-rod and the otherbelow the same, a bank of drop-wires hung upon alternating pairs of the warp-threads adjacent the warp-support, a second bank of drop-wires hung upon the warp-threads of the remaining pairs in the lower plane of warp-threads adjacent thesaid lease-rod,

1,239,792 and oppositely-working harness-frames pertaining to opposite planes of a shed, said harness-frames having the threads composing each of the said pairs drawn in alternating order through the heddle-eyes of the respective harness-frames so as to be divided between the said opposite shed-planes.

In testimony whereof I aflix my signature 1n presence of two wltnesses.

SIME O N S. JACKSON. WVitnesses:

CHAS. F. RANDALL, ELLEN 0. SPRING.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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