US783143A - Warp stop-motion for looms. - Google Patents

Description

No. 783,143. PATENTED FEB. 21, 1905.. 1

A. SGHOULER.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED OOT.9, 1903..

extreme position.

UNITED STATES Patented February 21, 1905.

PATENT Orricn.

ANDREW SOHOULER, OF NEW YORK, N. Y., ASSIGNOR TO DRAPER COM- PANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

W'ARP STOP-MOTION FOR LOOMS.

SPECIFIQATION forming part of Letters Patent No. 783,143, dated February 21, 1905, Application filed October 9,1903. Serial No. 176,853.

To all whom it may concern:

Be it known that I, ANDREW SoHoULER, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented an Improvement in Warp Stop-Motions for Looms, of which the following description, in connection with the accompanyingdrawings, isa specification, like figures on the drawings representing like parts.

In my copending application, Serial No. 176,352, filed October 9, 1903, I have illustrated and described a warp stop-motion for looms comprising detectors which are associated with the ordinary heddles of flexible material-such as twine, cord, wire, &c.and a vibrating feeler cooperating with said detectors upon the breakage of any warp-thread to stop the loom. In said application the invention is illustrated as applied to a plainloom. a form of my invention which is adapted to be applied to a fancy-loom where a large number of harnesses are employed. In thus applying my invention to a 'fancy-loom I have made each of the harness-frames in two parts, which are movable relative to each other and which are moved away from each other or spread when carried into one extreme position and are moved toward each other or are closed together when carried into the other The feeler is mounted upon one part of the frame, and the heddles are carried by the other part thereof, and a detector is secured to each of the heddles. When the two parts of the frame are closed together, the feeler is actuated by such relative movement of the parts and swung toward the detectors, which at this time are held out of the path of the feeler bythe tension on the warp-threads.

If any warp-thread is broken, the corresponding detector will obviously not be lifted out of the path of the feeler and by remaining therein will cooperate with the feeler to stop the loom.

In the drawings, Figure 1 is a view of a portion of a fancy loom, showing one harnessframe having my invention applied thereto.

In this application I have illustrated- Fig. 2 is a vertical section on the line Fig. 1, through the harness-frame, showing the position of the parts when the warps are in the upper plane of the shed. Fig. 3 is a similar view showing the position of the parts when the warps are in the lower plane of the shed; and Fig. 1 is a section on the line 59 3 Fig. 1.

3 designates a harness-frame, which is operated by any suitable or usual dobby mechanism 4;, such as are commonly employed on fancy looms. As herein illustrated, the harness-frame is positively raised by the dobby mechanism and is pulled into its lower position by means of the usual springs. (Not shown.) Said frame is made in two parts, which are movable relative to each other. The harness-frame is divided horizontally-that is, the sides of said frame are divided-so that the frame may be extended or collapsed in a vertical direction. The upper portions of the sides of the heddle-frame, which are rigidly secured to the upper rail 7 thereof, have rigidly secured thereto the sleeves or guides 110, in which the upper ends of the lower portions 12 of the sides telescope, said portions 12 each having the pin 13 playing in a slot 14: in the corresponding sleeve for the purpose of limiting the extent of movement of the two parts. Springs 15 yieldingly hold the two parts of the frame together.

10 designates the feeler, which is mounted to turn about a rod or pivotal shaft 11, carried by the lower rail 9 of the heddle-frame. The feeler is normally held in its retracted position, or that shown in Figs. 2 and 4, by any suitable means, such as springs 16, which are fastened at one end to the feeler and at the other end to any suitable fixed support, as the rod 11.

Secured to the. bottom of each heddle is a detector 17, which cooperates with the feeler to stop the loom upon the breakage of a warpthread, as will be presently described. The lower end of each heddle is made with an elongated loop 18, through which passes a guide-bar 19, extending across the heddleframe, said guide-bar operating to hold the bottom ends of the heddles in proper position and the loop permitting the vertical movement of the heddles with relation to the heddle-frame.

The springs are made weaker than the spring 6, and as a result when the harnessframe is lifted by the dobby mechanism the springs 15 will first be stretched and the harness-frame separated as much as the slots 14 will permit, and thereafter the springs 6 will be stretched, while the harness-frame an entirety moves upward. During the lowering movement of the harness-frame the stronger spring 6 will first pull the frame as an entirety downward, and thereafter the springs 15 will contract and the two parts of the heddle-frame.

frame is moved into its lowered position to carry the warp-threads into the lower plane of the shed and the two parts of the harnessframe are closed together, as above described, the detectors 17 would naturally be lowered sufficiently to be brought into the path of the feeler 10 except for the tension on the warpthreads, which raises the heddles with relation to the harness-frame and holds the detectors elevated above thefeeler, as seen in Fig. 3. So long as the warp-threads are intact, therefore, all of the detectors are held out of the path of the feeler. If, however, any warpthread becomes broken, the corresponding heddle will fail to be raised when the harnessframe is depressed, and the corresponding detector will therefore be carried into the path of the feeler when the two parts of the harness-frame close together.

I have herein shown means for vibrating the feeler by or through the movements of the two parts of the frame relative to each other, and for this purpose the feeler is provided at each end with an arm 20, which is acted upon by pendent arms 21, secured to the upper portions 100 of the harness-frame sides. As stated above, the spring 16 normally holds the feeler retracted, as shown in Figs. 2 and st. During the time when the two parts of the harness-frame move toward each other the pendent arms 21 are brought against the arms 20, and the feeler is rocked toward the detector and carried into the position shown in Fig. 3. So long as the warp-threads are all intact the feeler has perfect freedom of movement; but if any warp-thread breaks the feeler upon its forward movement strikes the corresponding detector and crowds the same against the stopguard 25, extending across the harness-frame,

and through some suitable mechanism operates to stop the loom. As herein shown, the stop-guard 25 and the feeler 10 are both insulated from the harness-frame and are in an electric circuit which includes any suitable stop mechanism for the loom. So long as the detectors are held above the feeler the electric circuit including the loom-stopping mechan ism will be maintained open and the loom will continue to run; but as soon as any warpthread breaks and the corresponding detector is struck by the feeler and brought into contact with the guard 25 the circuit is'closed and the loom-stopping mechanism set in operation to stop the 100111.

It will be noted that the feeler mechanism employed for each harness-frame occupies a minimum space, and the feeler mechanism on any one harness-frame does not interfere at all with the operation of the other harnessframe. Consequently this form of the inven-- tion can be used on a loom having a large number of harnessesTsuch, for instance, as a loom for weaving fancy goods.

While I have herein shown my warp stopmotion as adapted for use in connection with an electric loom-stopping mechanism, it will be obvious that with suitable modifications this invention may be adapted for use with mechanical loom-stopping mechanism, and I desire the claims to cover the invention broadly, regardless of the particular form of loom-stopping mechanism employed. It will be obvious, therefore, that many changes may be made in the construction of the parts without departing from the invention described in the appended claims.

I have not herein claimed, broadly, a warp stop-motion comprising a vibrating feeler which cooperates with means associated with each of the ordinary heddles of flexible materialsuch as twine, cord, &c.to stop the loom upon the breakage of a warp-thread, as this is illustrated and claimed in my copending application, above referred to. In the present application the feeler is operated entirely by the relative movement of different parts of the harness-frame without the interposition of any outside agencysuch as stationary racks, levers, &c.-and asI believe I am the first to devise such a construction Idesire to claim it broadly.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a loom, a harness-frame comprising two parts movable with relation to each other as the shed is formed, a plurality of heddles carried by one part, a feeler carried by the other part, and a detector associated with each heddle and cooperating with thefeeler to stop the loom when any warp-thread breaks.

2. In a loom, a harness-frame comprising two parts movable with relation to each other as the shed is formed, a plurality of heddles I carried by one part, a feeler carried by the other part, means to vibrate the feeler by movement of one part of the frame relative to the other, and a detector associated with each heddle and cooperating with the feeler to stop the loom when the corresponding warp-th read breaks.

3. In a loom, a harness-frame comprising two parts movable with relation to each other as the shed is formed, a plurality of heddles carried by one part, a feeler carried by the other part, means to vibrate the feeler by movement of one part of the frame relative to the other, and a detector associated with each heddle and cooperating with the feeler to stop the loom when the corresponding warp-thread breaks, said detectors normally being held out of the path of the feeler.

4. In a loom, a harness-frame comprising two parts movable with relation to each other and yieldingly connected together, a plurality of heddles carried by one part of said frame, a feeler carried by the other part thereof, a detector connected to each heddle, and means to actuate the feeler by relative movement of the two parts of the frame, said detectors being held out of the path of the feeler by the tension of the warp-threads.

5. In a loom, a harness-frame comprising two parts movable with relation to each other and yieldingly connected together, a plurality of heddles carried by one part of said frame, a feeler carried by the other part thereof, a detector connected to each heddle, and means whereby said feeler is moved toward the detectors when the two parts of the frame move toward each other, said detectors at this time normally being held out of the path of the feeler by the tension of the warp-threads.

6. In a fancy-loom, three or more harnessfrarnes each having a plurality of heddles of feeler to stop the loom upon the breakage of the corresponding warp-thread.

7. In a fancy-loom, three or more harnessframes each having a plurality of heddles of flexible material, a feeler cooperating with each harness-frame, means to vibrate each feeler by or through the movements of the corresponding harness-frame, and independent means associated with each heddle to cooperate with the corresponding feeler to stop the loom when the warp-thread corresponding to said heddle is broken.

8. In a loom, a harness-frame having a plurality of heddles, a feeler, independent detectors associated with the heddles, and means to operate the feeler entirely by the movements of the harness-frame.

9. In a loom, a harness-frame havingaplurality of heddles, independent detectors associated with the heddles, a feeler carried by the harness-frame, and means whereby the feeler derives its movements solely from the harnessframe.

In testimony whereof I have signed my name to this specification in the presence of two sub- Witnesses:

LoUIs (J. SMITH, JOHN G. EDWARDS.

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