US577077A - Chusetts - Google Patents

Description

(170 Model.) .7

A. O. SHUTTLEWORTH. ELEGTRIGAL WARP STOP MOTION FOR LOOMS. No. 577,077. Pan;entead Peb. 16. 1897.

UNITED STATES PATENT OFFICE.

ALPHEUS O. SHUTTLEWVORTH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO GEORGE DRAPER & SONS, OF HOPEDALE, MASSA- CHUSETTS.

ELECTRICAL WARP STOP-MOTION FOR LOOMS.

SPECIFICATION formingpart of Letters Patent No. 577,077, dated February 16, 1897.

Application filed April 30, 1894.

To all whom, it may concern.-

Be it known that I, ALPHEUS O. SHUTTLE- WORTH, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania,have invented certain new and useful Improvements in Electrical Warp Stop-Motions for Looms; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon, which forms a part of this specification.

My invention has for its object to provide means for stopping a loom when any breakage or disarrangement of the threads occurs such as would result in an imperfection in the work if the weaving continued. The mechanism for stopping the loom in event of accident to the threads is commonly called the stop-motion and the class to which my invention belongs is known as a warp stopmotion.

The particular type of stop-motion to which my invention relates is that in which the warp-threads, acting in connection with the heddles, serve to actuate the stopping mechanism proper whenever any one of the warpthreads breaks or becomes slackened to such an extent that it would render the weave imperfect if the work were continued without mending or tightening such thread.

In carrying my invention into effect I have constructed the stopping mechanism in such a way that I am able to use electrical force as a means for operating the shipper-lever and stopping the loom, and I have produced an electrical warp stop-motion for looms which is very rapid and certain in its operation, and which can be so disposed relative to the other working parts of the loom as to occupy comparatively little space, and thus leave the weaving mechanism unobstructed for the attention of the operator and free to perform its functions until the abnormal conditions of the weaving mechanism threatens the character of the work produced.

In the drawing which accompanies and Serial No. 509,447. (No model.)

forms a part of this specification I have shown a loom embodying my invention in perspective, parts of the loom being broken away for the sake of clearness.

Referring to the drawing by letter, A denotes a loom-frame of ordinary construction, having the heddle-frames aand heddle-frameoperating shaft a, connected by the straps a to the heddle-frames a, and the retractingsprings a secured to the bottom of said frames, as usual in this type of loom. In the heddle-frames a (only one beingshown in the drawing) are mounted the heddle-shafts b, on which the heddles b are strung in the usual manner,the loops b at the ends,through which the shafts I) pass, being longer than the width of the shafts in order that the heddles b may have alimited vertical movement.

The heddle-shafts b are connected with the horizontal bars of the heddle-frame a by means of the wires 12 this connection being for the purpose of completing the electrical circuit,as will be explained hereinafter. Said .heddle-shafts b, it will be understood, are electrically connected through the heddleframe (1,, although they may be connected in any other suitable manner.

Suspended from a bracket 0 are two de pending arms 0, to which are secured two horizontal detector-plates D D. Said plates D D, which I call detector-plates for the reason'that they play an important part in the detection of broken or sagging warp-threads, are adj ustably secured to said depending arms 0 by means of the bolts 0 in order that they may be adjusted at dilferent angles, according to the angle of the line of the shed, and they run the entire length of the loomframe, so as to extend through the entire field of heddle-frames. Said plates D D lie between the heddle-shafts b and the'horizontal bars of the heddle-frames a and are highly magnetized in a manner and for purposes which will hereinafter appear. These plates D D are, however, out of electrical contact 9 with the heddles, heddle-frames, and other working parts of the loom, the slots d, which embrace the connecting-wires b ,-being insulated on their sides, as shown. The depending arms 0, which support plates D D, are

wound, as shown at 0, so as to form electromagnets, and they are connected with a source of electrical energy E through the connection 0 Through said connections 0 the current normally passes from the source of electrical energy E to a binding-post c on the frame, thence to the magnets c and detector-plates D D, and then through connection 0 passes to the shipper-lever F and through spring a to the binding-post c. Said binding-post c is connected with the source of electrical energy E by connection 0 thus completing the electrical circuit.

The shipper-lever F is a springlever, as shown, and is normally locked in position to keep the circuitabove described unbroken by means of the locking-lever f, which is pivoted to a lug on the loom-frame, the hooked end f of which engages the shipper-lever F. The locking-leverf is arranged Within the field of attraction of an electromagnet G, which is normally inactive, but which is in electrical circuit with the heddles I) through the connection g and wires 11 which connect the heddle-shafts Z) with the heddle-frame a, as hereinbefore described. Said magnet G is in circuit also with the source of electrical energy E through the binding-post c by means of the connection From the foregoing it will be seen that the heddles are norm ally held out of con tact with the magnetized detector-plates D D during the shed by the tautness of the warp-threads, and the electrical circuit is through bindingpost 0 connections 0 magnets 0, plates D D, connections 0 shipper-lever F, and spring 0 to binding-post 0 If, however, a warpthread should break or become so slack as to endanger the quality of the weave, the particular heddle-wire on which the pressure of the warp-thread is relaxed will be attracted by one of the plates D D, according to the position of the heddle-frame at the time, and short circuiting through the heddleshafts, wires b connection g, electromagnet G, and connections 9 to the source of electrical energy E will follow. The electromagnet G being in the circuit last traced will be energized and will attract the free end of the pivoted locking-lever f, thus releasing the shipper-lever E, which will spring to the position indicated in dotted lines in the drawing and actuate the stopping mechanism, this latter mechanism not being illustrated or described, as it forms no part of my invention and may be any suitable type of the numerous and well-known forms. hen the break in the thread has been repaired, the shipper-lever may be thrown to its normal position, and the electrical current will resume its normal circuit.

I claim- 1. In an electric Warp stop motion for looms, the combination with the heddleframes, of a series of heddles mounted on their shafts so as to have a limitedindependent vertical movement, a magnet so placed relative to said heddles as to be in close proximity to the ends of said heddles at the termination of each shed, stopping m eehanism, and electrical connections between said magnet and stopping mechanism to actuate said mechanism and stop the loom when a heddle comes in contact with said magnet.

2. In an electric warp stop motion for looms, the combination with the heddleframes, of a series of heddles mounted on their shafts so as to have a limited independent movement vertically, a magnet placed in close proximity to the ends of said heddles and adjustable to the angle of the line of the shed, stopping mechanism, and electrical con; nections between said magnet and stopping mechanism to actuate said mechanism and stop the loom when a heddle comes in contact with said magnet.

In an electric warp stop motion for looms, the combination with the heddleframes, of a series of heddles mounted on their shafts so as to have a limited independent vertical movement, magnetic plates adj ustably mounted relative to said heddles so as to be in close proximityto the ends of said heddles at the termination of the shed, a source of electrical energy with which said magnetic plates are in circuit and by which they are constantly excited, stopping mechan ism, and electrical connections between said stopping mechanism and said magnetic plates whereby when contact is made by a heddle with either of said magnetic plates the stop ping mechanism is actuated and the loom is brought to a state of rest.

4. In an electric warp stop motion for looms, the combination with a series of bed die frames, of heddles mounted on their shafts so as to have a limited independent vertical movement, slotted magnetic plates extending through the entire field of heddleframes and arranged so as to lie in close proximity to the ends of the heddles at the close of the shed, stopping mechanismfor the loom, and electrical connections between said magnetic plates and stopping mechanism whereby the latter is actuated and the loom is brought to a state of rest when any one of the heddles contacts with either of said magnetic plates and completes the circuit.

5. In an electric warp stop motion for looms, the combination with the heddleframes at having the heddle-shafts b, of the heddles I) having limited vertical play on said shafts, the magnetic plates D, D, extending through the entire field of heddle-frames, stopping mechanism, a source of electrical energy from which a current normally passes through the loom-frame and magnetic plates D, D, and electrical connections between the heddles and the stopping mechanism whereby when a heddle contacts with either of said plates D, D, short-circuiting ensues, the stopping mechanism is actuated, and the loom is brought to a state 01": rest.

6. In an electric warp stop -motion for the stopping mechanism is actuated looms, the combination with the heddleframes at having the heddle-shafts b, of the heddles b havinglimited vertical play on said shafts, the connections b the slotted mag-- netic plates D, D, extending through the entire field of heddle-frames and embracing connections b stopping mechanism, a source of electrical energy from which a current normally passes through the loom-frame and magnetic plates D, D, and electrical connections between the heddles and the stopping mechanism, whereby when aheddle contacts with either of said plates D, D, short-circuiting ensues, the stopping mechanism is actuated and the loom is brought to a state of rest.

7. In an electric warp stop motion for looms, the combination with a series of heddleirames a having the heddle-shafts b, of the heddles I) having limited vertical movement on said shafts, the connections b the magnetic plates D, D, extending through the entire field of heddle-frames and provided a with slots d which embrace said connections b and are insulated therefrom stopping mechanism, a Source of electrical energy from which a current normally passes through the loom-frame and magnetic plates D, D, and electrical connections between the heddles and the stopping mechanism, whereby when a heddle contacts with either of said plates D, D, short-circuiting ensues, the stopping mechanism is actuated, and the loom is brought to a state of rest.

8. In an electric warp stop motion for looms, the combination with the heddleframes, of a series of heddles mounted on the heddle-shafts so as to have a limited independent vertical movement, two magnetic plates which are constantly excited While the loom is in operation extending through the entire field of heddle-frames and so positioned as that they lie in close proximity to the ends of the heddles at the termination of the shed, a source of electrical energy with which said magnetic plates are in circuit, stopping mechanism in circuit with said plates, actuating means forsaid stopping mechanism which is normally out of circuit, and electrical connection between said actuated means and said heddles whereby when any one of said heddles contacts with either of said magnetic plates short-circuiting ensues, and the loom is brought to a state of rest.

9. In an electric warp stop motion for looms, the combination with the heddleframes, of a series of heddles mounted on the heddle-shafts so as to have a limited independent vertical movement, two magnetic plates, which are constantly excited while the loom is in operation, extending through the entire field of heddle-frames and adjustable to the angle of the line of the shed,said plates being so positioned as that they lie in close proximity to the ends of the heddles at the termination of the shed, asource of electrical energy with which said magnetic plates are in circuit, stopping mechanism in circuit with said plates, actuating means for said stopping mechanism which is normally out of circuit, and electrical connections between said actuating means and said heddles whereby when any one of said heddles contacts with either of said magnetic plates short-circuiting ensues, the stopping mechanism is actuated and the loom is brought to a state of rest.

10. In an electric warp stop -motion for looms, the combination with the heddleframes, of a series of heddles carried by the heddle-shafts and having a limited vertical movement thereon, electromagnets suspended from the loom-frame, magnetic plates secured to said electromagnets and excited thereby extending through the entire field of heddle-frames, in close proximity to the ends of said heddles so as that said plates will attract and hold any one of the heddles on which tension is relaxed, and-means 'for energizing said electromagnets.

11. In an electric warp stop-motion for looms, the combination with the heddleframes, of a series of heddles carried by the heddle-shafts and having a limited vertical movement thereon, electromagnets suspended from the loom-frame, magnetic plates adjustably secured to said electromagnets and excited thereby, said plates extending through the entire field of heddle-f ram es in close proximity to the ends of said heddles so as that said plates will attract and hold any heddle on which tension is relaxed, and means for energizing said electromagnets.

12. In an electric warp stop-motion for looms, the combination with a series of heddle-frames, provided with heddle-shafts, of heddles mounted on said shafts so as to have a limited independent vertical movement, two magnetic plates extending through the entire field of heddle-frames but normally out of contact with said frames and heddles,

a source of electrical energy with which said a magnetic plates are in circuit, a spring shipper-lever in circuit with said plates, means for locking said shipper-lever, electrical connections between said heddles and the source of electrical energy, and a normally inactive electromagnet to control said locking means for the shipper-lever in circuit with said heddles, whereby when any one of the heddles contacts with either of said magnetic plates short-circuiting through said electromagnet ensues, the spring shipper-lever is released and the loom stopped.

13. In an electric warp stop -motion for looms, the combination with a series of heddle-frames provided with heddle-shafts, of heddles mounted on said shafts so as to have a limited independent vertical movement, two magnetic plates extending through the entire field of heddle-frames but normally out of contact with said frames and heddles, a source of electrical energy with which said magnetic plates are in circuit, a spring shipper-lever in circuit with said plates, a pivoted 10ckin =1ever en 'a in an arm on said shi the shi )er-lever released and the 100111 is IO a a O v per-lever, electrical connections between said stopped.

heddles and the source of electrical energy, In testimony whereof I affix my signature and a normally inactive eleetroniagnet to conin presence of two Witnesses.

trol said pivoted locking-lever in eireuitwith r said heddles, whereby when any one of said ALPIIEUS SHUTTLEWVORFH' heddles contacts with either of said magnetic \Vitnesses:

plates, short-circuiting through said electro- LEWIS F. BRoUs magnet ensues, the looking-lever is lifted, WM. B. HILT.

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