US818019A - Shedding mechanism for looms. - Google Patents

Description

Nol 4818,019

PATENTED APR. 17, 1906. C. H. DRAPER.

SHEDDING MECHANISM FOR LOOMS.

APPLICATION FILED JULY 171905.

NITED. STATES PATENT Trios.-

CLARE H.1DRAP.ER,' or'HorEDALE, MASSACHUSETTS, A'ss'ieNoa To DRAPER. CoMrANr, lor HCPEDALE, MASSACHUSETTS, A Cosro- RATION CFMATNE.

SHEDDING. MEol-Amsm Fon Looms.

Specification of Letters Patent. Application mea ,July 17, 1905; serial N-l 269,990.

Patented lApril 17, l906.

To a/ZZ whom it maag concern7 Be it known that I, CLARE Hl DRAPER, a

y act' as -warp-stopfmotion-controlling detectors and serve also as heddlesas, for inv stance, in United States Patent No. 732,885, dated July 7, 1903- and especially my invention alpplies to such harness mechanism when' each arness-frame carries a plurality of series of the detector-heddles in parallelism across the frame.

Heretofore the several Seriesof Such heddles on eachframe have been Suspended from cross-bars iixedly secured'to and forming) a part of the harness-frame, the cross-bars elng of equal de th and assin throu hlon i- P dP g g g A warp-t tudinal slots in the he dles. When the shed is formed, the warp-threads controlled by the front series ofheddles will not be alined in actualV practice with thel threads .controlled by the rear series of heddles,`fan d thaplanes of the shed, both upper arid lower, will not be smooth and even and substantially lin a single plane. V.This is objectionable, as the shuttlc-path is not aso en and clearvas it should.

be, and a slight erence in tension will bev imparted to the two sets of threads. My present invention has for lts ob] ect the -production of means whereby 1nl mechanism".

of the ner-al character referred to all of the reads in either plane of the shed will be in alinement, and thus located in a single plane.

' The various novel features of my'invention will be fully described in the subjoined specication and particularly pointed out inthe following claims.

Figure 1 is a transverse sectional view through the vharness-frames of a loom having my invention embodied therein, the rear harness member being raised, showing the alinement of the warp-threads in the lanes of the shed. Fig. 2 is asimilar view, ut with the position of the two harness-frames reversed; and Fig. '3 is a front elevation of one Side of a harness-frame with the side bar broken out.

I h'ave shown my invention as applied to a plain or two-harness set for simplicity and convenience of illustration, the detector-heddles of each harness-frame being divided into parallel series in a manner familiar -to those skilled'in this art. Each harness-frame in practice comprises two upright 'side bars 1, (see Fig. 3,) one at each side, connected at their lower ends by a bottom cross-bar 2, the upper ends ofv the side barshaving enlarged heads 3, to which are attached the cross-bars which form the top of the frame and from which the detector-heddles are suspended.

I have herein shown two top cross-bars, as 4 5, for each harness-frame, set on edge and in arallelism, the front harness-frame being in Iipated as a whole at H and the back frame .at Y I The harness-frames are alike in structure and only one need be described in detail,- the Jront bar 4 being made of less depth thanthe rear'bar 5 on each'frame, as clearlyshown in the drawings, s'o that the upper edge of bar 5 will rise a little' higher and its lower edge will descend a little lower than the corresponding edges of the companion front bar ,4.

The twobanks or series ofw'arp stop-motion-controlling detectors d d are made as thin lat metal strips or plates, each having a warp-eye 6 and alongitudinal slot 7 near the upper end, the cross-bar 4 being loosely eX- tended through the slots of the series d, while the cross-bar 5 is similarly extended through the slots of the series d for each harnessframe. 1 f

The detectors not only' act to detect war failure, but they also serve as heddles in wel known manner and by co erationwith the oppositely-moying feelers f mounted on a -threads controlled the two series of hed les-of each harness-l ICM' lower than the front series when the harnessframe is depressed. This I accomplish by Av'making the rear cross-bar 5 deeper than the Jfront cross-bar 4, and, viewing Fig. 1 it will be seenthat the lower edge of the bar 5 of the front frame H, which is depressed, has carried the heddles d down' far enough to bring their warp-threads into alinement with the threads of the adjacent series d on the crossbar 4 in the lower plane P oi" the shed. So, too, the upper edge of the bar 5 ofthe back harness-frame H has lifted its heddles d higher than the front series d of thev bar 4, bringing all the warp-threads into alinement inA the upper plane P of the shed.

In Fig. 2 the harness-frames I-I and H have been reversed in position, so that the former is raised and `the latter de ressed, and the alining of the two` groups o Warp-threads in each plane of the shed is clearly shown.

The construction is exceedingly simple, but

it is thoroughly eflicient in practice and pro-V vides'smooth and even planes when the shed isopened, im roving the product and obviating any diculties or objections due to irregular or non-alined Warp-threads in either plane of the shed.

Should there be more vthan two series of detector-heddles for each harness-frame7 the cross-bars will be made of increasing de th as they are farther from the front, as lierein shown for two cross-bars on each frame.

Having fully described my invention, what I claim as new, and desire to securel by Let# ters Patent, is-

1. In a loom, reciprocating harness-frames each provided with a plurality of parallel se ries oi' detector-heddles having limited longitudinal movement relative to their frames, and means to position the heddles of a frame to bring the Warp-threads controlled thereby into alinement in a plane of the shed.

2. In a loom, reciprocating harness-'frames threads controlled by both series to be alined when the shed is opened.

4. In a loom, reciprocating harness-frames each provided with two arallel cross-bars,

and a series of longitudinal y-'slotted detectorheddles suspended from each cross-bar and having limited longitudinal movement relative thereto, the rear cross-bar extending higher and lower than the front cross-bar, to lift its series of heddles higher and depress them lower than the series on the front crossbar, to thereby aline the Warp-threads of both series in both planes of the shed.

5. In a loom, reclprocating harness-frames each provided with two series of detectorhedd les, each heddle coperating With aWarpthread, and means to effect a different vertical movement of the two series of heddles,

to thereby cause the warp-'threads of both se-4 ries to be alined in the planes of the shed when the latter is opened.

In testimony whereoic I have signed my name to lthis specification in the presence of 8o two subscribing witnesses.

CLARE H. DRAPER. Witnesses:

FRANK J. DUTGHER, E. C. HoDGEs.

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