US651813A - Warp stop-motion for looms. - Google Patents

Description

No 65E,8,l:32..

Patented lune l2, I900. J.-F. DUSTIN. WARP STOW? MOTION FOB LUDMS.

(Application; filed 5591c. 22, 1898.);

2 Sheets-Sheet I.

(No Model.)

Inventor.

Witnesses.

Nn 65l,8l3 Patented lune I2Ql900.

J. F. DUSTIN.

WARP STOP MOTION FOR LOOMS. (Application filed Sept. 22, 1898.)

(No Model.) 2 Sheets-Sheet 2.

Witnesses. Inventor.

UNITED STATES PATENT OFFICE.

JOHN F. DUSTIN, OF FITCHBURG, MASSACHUSETTS.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 651,813, dated June 12, 1900.

I Application filed September 22, 1893- Serial No. 691,608. No model.)

To all whom it may concern.-

Be it known that I, JOHN F. DUSTIN, a citizen of the United States, residing at Fitchburg, in the county of Worcester and State of Massachusetts, have invented a new and useful arp Stop-Motion for Looms, of which the following is a specification.

My invention relates to a mechanism for stopping a loom upon the failure or breakage of a Warp-thread; and the-object of my invention is to provide a simple, eflicient, and durable warp stop-motion which can be applied to existing or new looms at comparatively-small expense.

One especial object which I have had in view in constructing warp stop-motions according to my present invention is to time the stopping devices so that they will not be affected by any undue slackness or variation in the tension of the several warp-threads.

To these ends my invention consists of the parts and combinations of parts of my warp stop-motion, as hereinafter described, andin the construction of a composite drop-heddle for use in connection therewith, as will be hereinafter explained.

In the accompanying two sheets of drawings, Figure l is a longitudinal sectional view showingsufiicient-parts of a loom to illustrate the application of myinvention thereto. Fig. 2 is an enlarged fragmentary perspective view illustrating the construction of the heddles and heddle-frame. Fig. 3 is a similar view illustrating a slightly-modified form of construction. Fig. 4 is a perspective View illustrating a modified form of heddle which may be employed. Fig. 5 is a detail view illustrating the manner in which the heddles may be weighted to adapt them for use in connection with different grades of yarn. Fig. 6 is a diagrammatic View showing the position of the parts during the normal operation of the loom. Fig. 7 is a similar view showing the position of the parts when the stopping devices will be brought into action, and Fig. 8 is a perspective View of a guide-piece for holding the harness-frames in position.

My invention, although certain features thereof may be employed in different constructions, relates especially to that class of warp stop-motions which are controlled by drop-heddlesthat is to say, to that class of warp siop-motionsin which the'heddles are mounted in their heddleframes so as to be capable of an independent motion therein. Inthis class of warp stop-motions when a heddle-frame is moved down the tension of the warp-threads will tend to raise the beddles to their highest position in their heddleframe. Whenever a warp-thread is broken, the heddle corresponding thereto willnot be picked up or raised at this time, and the feeler or other devices controlled by the heddles will bring the stopping devices into action to stop the 100m. In applying and using warp stop-motions of this character I have found in practice that their reliability depends ina large measure upon maintaining a substantiallyuniform tension for the warp-threadsthat is to say, in a warp stop motion employing drop-heddles as ordinarily constructed it frequently happens that the stopping devices will be brought into action whenever a warp-thread becomes slight-1y loosened or" the heddles in their frame will not affect the operation of the stopping devices except at a time when the heddle-frames have been brought to rest and are standing in their1ow est position.

When a heddle-frame has been moved down so as to open the shed, the bend or deflection of the warp-threads will be sufficient to insure the lifting of each individual heddle out of the way of its feeler without regard to slight variations in tension, whereas in former constructions, so far as I am familar with thesame, the feeler is shifted or operated while the heddle-frame is still moving down, so that slight variations in the tension of the Warp-threads will be much more liable to unnecessarily cause the stopping devices to act than in a warp stop-motion constructed according to the present invention.

My warp stop-motion which I have illustrated herein comprises a heddle-frame, heddles mounted therein, so as to be capable of an independent movement, a feeler movably mounted in the heddle-frame, and means for actuating the feeler after the heddle-frame has reached its lowest position. In the specific construction which I have illlustrated the feelers are moved or shifted in one direc-- tion by'a stationary cam-plate when the heddle-frame is rising. For shifting the feelers in the opposite direction I provide a plate normally tending to move into position to shit t the feelers, and connections controlled by the lay are provided for withholding said plate until after the heddle-frame has reached its lowest position. By controlling the movable shifting-plate from the lay I have provideda stopping mechanism which is timed to act when the heddles are in their lowest position, as in the normal operation of weav- 'ingthe heddle-frames dwell or remain in their lowest position while the lay is moving back,

and then forward again to complete one pick.

v Referring to the'drawings and in detail, A designates the side frame of'a loom; B, the warp-beam thereof; D,-the vibrating lay, and

, Q the whip-roll. These parts may be of the ordinary or approved construction.

The heddle-frames F, as illustrated most clearly in Figs. 6 and 7, consist of side pieces 1.0,which are connected and secured together 1 simply by transverse heddle-rods, and I prefer to dispense with the top and bottom pieces employed in the ordinary forms of heddleframes, so as to provide a lighter construction, and to leave the bottom of the heddleframes open, so that the heddles may be weighted or provided with pendants to adapt them for different grades of yarn, as hereinafter described.

In my preferred construction, as illustrated in Fig. 2, the hedcllerframes are connected by two sets of heddle rods or plates 12 and 13, so that two sets of heddles 14: may be strung thereon in different relative vertical planes.-

Secured in the heddle-frames between the heddle-rods 12 and 13- are toothed strips or rods 16. Movably mounted between the toothed strips 16 is a toothed feeler 17, having eyes of the heddles 14 are long enough to al low for a lost motion or drop of the heddles in their frame, and inpractice I have found that the use of plain wire heddles having elongated eyes is objectionable, as the end of one heddle is liable to be pushed through the eyeof a succeeding heddle or become interlaced therewith. V

By providing the heddles 14 employed in off catch of the loom.

a warp stop-motion constructed according to my invention with overhanging metal plates 15 I have not only constructed the heddles so that they will cooperate with the feeler 17 arranged between the heddle rods, as described, but I have also provided an efficient means'for preventing the heddles from becoming interlaced. g

Mounted in a bearing-piece 19 beneath the warp-beam, as illustrated in Fig. 1, is athrowoff hook 20 for engaging the ordinary throw- Pivotallyconnected to the throw-off hook 20 is a throw-01f link 21. The throw-off. link 21 is provided on its under side with anincliue or cam cooperating -with a roller 22, carried by the vibrating lay. The upper side of the link 21 is provided with a notch or projection cooperating with a downwardly-extending finger carried by the lay D.

At its rear end the link 21 is connected by a rod or wire 24 to operate the movable plate actuating the feelers, as illustrated most clearly in Figs. 6 and 7. shown in these figures,'a bracket 26 is secured to the loom side. Mounted on the bracket 26 and preferably adjustable thereon is a piece 27 ,-carrying an angle-arm 28. The movable plate forshifting the feeler 17 when-the heddleframes are in their lowest position isjournaled in the arm 28. Secured to the opposite loom-frame is a bracket 29, adjustably fastened to which is an angle-arm 30. Secured in the angle-arm 30 is an L-piece 31, preferably made out of round iron, and mounted on the L-piece 31 is a cam-plate 32 for rest-oring or shiftingback the feelers 17. The campie'ce 32 can be adjusted up'and down on the L-piece 31, and by making the L-piece 31 out of round iron the cam 32 can be tipped or tilted, which is in some cases adesirable adjustment, as in some looms the front harness-frames are raised-slightly more than the .rear harness-fram es.

In the operation of a warp stop-motion for looms as thus constructed when the heddleframes reach their lowest position, as illustrated in Fig. 1, the lay D moves back from the front of the loom, and as the roller 22, carriedby the lay, moves from under theinclined portion of thelink 21 the weight of the link 21, which may, if desired, be reinforced by a spring, as shown in Figs. 6 and 7, will tip-the 'two sets of heddles arranged in different vertical planes, the feelers may pass through the ICS IIO

eyesofthe heddles, the upper edges of the heddle-rods themselves being notched or toothed, and. I have illustrated such a construction in Fig. 3. As shown in this figure, each heddle-rod consists of two toothed sections 35, mounted between which are movable feelers 36, and where this construction is adopted the metallic pieces 150, secured or brazed in the upper parts of the heddles 140, need not project to one side as far as in the construction before described.

In somecasesin orderto diminish thelength of the drop or lost motion of the heddles necessary to control a stopping mechanism constructed according to my invention I contemplate employing pivoted metallic pieces which are operated from but not rigidly secured to the heddles, and I have illustrated such a construction in Fig. 4. As shown in this figure, the heddleeye 40 of the heddle 240 maybe made shorter than in the constructions before .described. Passing through a secondary eye 41 of the heddle 240 is a blade or metallic piece 250, a series of which blades may be pivoted upon a rod, as 43, to cooperate with a series of such heddles. In this construction it will be seen that the drop or lost motion of the heddle 2&0 will produce an increased motion of the metallic pieces 250, which cooperate with the feelers.

In some cases, where very stiff or wiry yarns are being woven, it sometimes happens that the light wire heddles are not heavy enough to insure the positive action of the stopping devices, and in order to adapt my warp stopmotion for all classes of weaving I contemplate in some instances weighting the heddles or providing them with pendants to insure their proper action even when coarse or wiry yarns are used. In such cases the heddles 14 are provided at their lower ends with weights or pendants l8,which may be detachably secured to the wires which form the heddles in any ordinary manner. Different lengths of weights 18 may be used to secure the necessary results, as desired.

To insure the heddle-frames retaining their proper position in the loom, the guide-pieces illustrated in Fig. 8 may be employed, if desired. 1

As shown most clearly in Figs. 6 and 7, the guide-pieces 33 are adj ustably fastened to the elbow- pieces 28 and 30 at the opposite sides of the loom, respectively, and detachably secured in the guide-pieces 33 I may, if desired, employ cross-rods 34, which extend across from the guide-pieces 33 at each side of and between the several heddle i'rames and form an abutment which limits the lower plane of the shed, so that even if a thread is unduly 'slackened its heddle may be picked up out of the way of the feelers as the heddle-frames move down between the crossrods 34.

4 without departing from the scope of my invention as expressed in the claims. I do not wish, therefore, to be limited to the form which I have shown and described; but

hat I do claim, and desire to secure by Letters Patent of the United States, is-

1. In a warp stop-motion for looms, the combination of a heddle-frame, a series of drop heddles mounted therein, a feeler mounted in and carried by the heddle-frame in position to cooperate with the series of drop-heddles,stopping connections controlled by the feeler, and means for actuating the feeler while the heddle-frame is stationary, substantially as described.

2. In a warp stop-motion for looms, the combination of a heddle-frame, heddles car ried thereby and capable of an independent movement therein, a feeler mounted in the heddle-frame, connections controlled by the lay for actuating the feeler after the heddle frame hasreached its lowest position and stopping connections controlled by the feeler, substantially as described.

3. In a warp stop-motion for looms, the

combination of a series of drop-heddles or detectors, a longitudinally-movable toothed feeler cooperating therewith, stopping connections controlled by the feeler, and connections from the lay for actuating the feeler during the dwell of the heddles, substantially as described.

4. As an article of manufacture, a wire heddle carrying a metallic end plate, substantially as and for the purposes set forth.

5; The combination of a heddle-frame, two sets of heddles mounted in the heddle-frame in different relative vertical planes, a feeler movably mounted in the heddle-frame be-. tween the two sets ofheddles, said heddles being provided with overhanging projections or plates cooperating with the feeler and stop ping connections controlled by the feeler, substantially as described.

6. The combination of a heddle-frame, two

sets of heddles mounted in the heddle-frame in different relative vertical planes, toothed bars secured in the heddle-frame between the two sets of heddles, a toothed feeler movably mounted between said bars, the heddles be ing provided with overhanging projections or blades cooperating with the feeler and stop ping connections controlled by the feeler, substantially as described.

7. The combination of a heddle fram e, hed- I dles movably mounted therein, a feeler coopcrating with the heddles, means for moving the feeler in one direction when the heddleframe rises, a plate normally tending to move into position to shift the feeler in the oppo= site direction, connections from the lay for withholding said plate until after the heddleframe reaches its lowest position and stopping connections controlled by the feeler,substantially as described. p 8. The combination of a heddle-frame, heddles movably mounted therein, a feeler coop i crating with the heddles, an adjustable ca rno plate for moving the feeler in one direction when'tlle heddle-frame rises, a plate normally tending to move into position to shift the feeler in the opposite direction, connections from the lay for Withholding said plate until-after the heddle-franne reaches its low? est position and stopping connections'controlled by the feeler, substantially as dev scribed.

9. The combination of a heddlefram'e, bed

dles movably mounted therein, a feeler cooperating with the heddles, an adjustable cam-. plate for moving the-feeler in one direction when the h'eddle-frame rises, a plate nor- .my hand in the presence of two subscribing mally tending to move into position to shift the. feeler in the opposite direction, a stop-V ping-linkconnected to the plate, a projection or roller carried by the lay for normally raising and lowering the stopping-link to actuate said plate and stopping connections conatrolled by the stopping-link, substantially as described. I j p lO. The combination 0fahedd1e-frame,heddles movably mounted therein, a notched or Etoothed feeler cooperating with the heddles, an adjustable cam-plate for moving the-feeler iin-one direction when the heddle-franie rises, a stopping-link having an incline on its lower edge for engaging a projection orroller carried by thevibrating lay, and a notch or pro- :jection on its upperedge cooperating with a 1 projection or finger carried by the lay and stopping connections controlled by the stopping-link, substantially as described.

In testimony whereof I have hereunto set witnesses. v V

JOHN F. DUSTIN.

Witnesses:

I LoUIs W. SOUTHGATE,

PHILIP W. SOUTHGATE.

Images