US894283A - Electric stop-motion for warping-machines. - Google Patents

Description

No. 894,283. PATENTED JULY 28,1908.

F. OTT. I ELECTRIC STOP MOTION FOR WARPING MACHINES.

APPLICATION FILED MAY 9, 1907.

FIGH

=- s /26INVENTORI FEEDER/CK 077;"

WITNESSES;

operators.

FREDERICK OTT, OF SOUTH BETHLEHEM, PENNSYLVANIA.

ELECTRIC STOP-MOTION FOR WARPING-MACHINES.

Specification of Letters Patent.

' Patented July 28, 1908.

Application filed May 9, 1907. Serial No. 372,775.

To all whom it may concern:

Be it known that I, FREDERICK OTT, of South Bethlehem, in the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Electric Stop-Motions for I/Varping- Machines, whereof the following is a speoifb cation, reference being had to the accompanying drawings.

My invention relates to an improvement in electric s topmotions and in its present embodiment is shown as applied to a kreel used in connection with a warping machine, and is adapted for use with silk, cotton or wool.

The object of my invention is to provide means for quickly detecting broken ends of threads and immediately stopping the machine. Heretofore it has been common to have an end run from five to ten yards before the operator discovered the breakage, and it was necessary in such case to unwind the yarn from the reel until the broken end was found, generally requiring the services of two In replacing this section or band of yarn back upon the reel it becomes uneven in tension as compared with the remainder of the reel, that is, it hardly ever is rewound with its original tension as received when put directly on the warping machine from the kreel. This uneven tension causes imperfect cloth to be woven. By the use of my invention this difficulty is overcome, since, as soon as a thread breaks the machine stops and no unwinding of the reel is necessary in order to find the broken end.

In the accompanying drawings, Figure I, is a central vertical section through a kreel embodying my invention. Fig. II, is a front elevation of the same. Fig. III, is a partial plan view showing the manner in which the threads are crossed.

In said figures, the horizontal bar 1, is supported at each end by side frames 2, 3. Above this bar is mounted the frame 5, holding the series of glass reeds 6, between which the warp threads are passed. Adjacent the reed frame and forming a horizontal support for the threads as they come from the bobbins is a glass rod 8. Secured to the bar 1, in any approved manner is a series of inclined rods 10, each having a row of bobbins 12, mounted thereon. By thus mounting the bobbins upon the inclined rods, the threads may pass up vertically without encountering any adjacent bobbin.

At the front of the kreel above the bar 1, is

mounted a horizontal bar 15, formed of wood or any other suitable insulating material having a metal strip 16, embedded therein and extending the full width of the kreel. Below the bar 15, and parallel thereto is another bar 18, also of insulating material upon which is mounted the metal back 20, of a comb, comprising a series of wire fingers 22, each provided at its upper end with a porcelain tip 24, which affords a smooth surface for contact with the warp threads 26, as theypass from the bobbins to the warping machine.

The back 20, of the comb is held in position by two metal strips 28, and 30, as clearly shown in Fig. I. The wires 22, may be secured to the back 20, in any approved manner. Opposite the bar 15, and parallel therewith is a rod 32, extending across the kreel and forming a stop for the wires 22, so that they may not become distorted when drawn awayfrom the strip 16, by the crossed threads 26. The strip 16, and back of the comb 20, are connected to the wires 34, and 36, leading to a suitable source of electric energy in eluding in the circuit any desired form of 7 'fingers 22, away from the strip 16, and pass on to the warping machine. It will be obvious that if either one of a pair of these threads should become broken, the corresponding finger 22, would be released and spring into contact with the strip 16, thus closing the electric circuit and energizing the electric stop motion device to stop the machine immediately.

, The vitreous tips 24, are more frictionless than the metal of which the finger is composed. By the arrangement described, the line conductor is in a plane other than that in which the threads move. Accordingly, it is possible to have the portion of the fingers which contact with the threads made of or covered with non-metallic material more frictionless than the metal of which the fingers are composed (said material being usually electrically non-conductive) and yet not interfere with the closing .of the circuit when the thread breaks.

Having thus described my invention, 1 claim 1. In an electrical stop motion for a Warping machine the combination of a series of pivoted metallic fingers; a line conductor crossing the line of movement of the fingers; an electrical circuit including both said fingers and said conductor; vitrified coatings extending over a portion of each of said me tallic fingers but not over that portion of said fingers which is capable of coming into contact With said line conductor, and guiding means for so guiding a plurality of crossed threads that at the point of crossing they sustain a finger at its vitrified portion and thus, so long as unbroken, maintain said finger from electrical contact with said line conductor.

2. The combination With a Warping machine and a kreel therefor, having aseries of spools mounted thereon; of a series of metal fingers connected to a metal strip, said fingers being covered for a portion of their length With a vitreous surface for engagement With the threads fed from said spools; an electrical conductor included in a circuit and extending in juxtaposition to said fingers and adapted to be engaged by the bare portion of said fingers, each of said fingers being held from contact With said conductor by a pair of crossed threads lying in a substantially horizontal plane, fed from said spools, whereby When one of a pair of threads breaks, or a loose end occurs, the corresponding finger Will be free to close said circuit to control a stop motion for the Warping machine.

3. The combination With a Warping machine and a kreel therefor having a series of bobbins or spools mounted thereon; of a se ries of metal fingers secured to a metal strip,

each of said fingers being provided With a porcelain coating extending over a portion of its length; an electrical conductor included in a circuit and extending in juxtaposition to said fingers; means for supporting the threads passing from the spools so that they may engage the coating 011 said fingers, each of said fingers being held from contact with said conductor by a pair of crossed threads lying in a substantially horizontal plane fed from said spools, whereby When one of apair of threads breaks, or a loose end occurs, the corresponding finger will be free to close said circuit to control a stop motion for the Warping machine.

4. In an electrical stop motion for a Warping machine, the combination of guiding means for maintaining the threads as they pass from the kreel to the Warp beam in a substantially horizontal plane, and, at the same time, permitting the crossing of said threads as desired Within said plane; a series of vertical metallic fingers including a nonmetallic portion Which is more frictionless than the metal of Which the fingers are composed, pivoted so as to move substantially along the line in Which said threads travel, and included Within an electric circuit, each of said fingers being restrained by a pair of cross threads; a line conductor crossing the line of movement of the fingers in a plane other than that in which the threads move, and also included in said circuit, whereby a different and more frictionless portion of each finger is engaged by the crossing threads from that Which, when a thread breaks,

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