US858695A - Warp stop-motion for looms. - Google Patents

Description

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No. 858.695. PATENTBD JULY 2, 1907. J. woJcIBcHowsKI s R. PLUZANSKI.`

WARP STOP MOTION FOR LOOMS. APPLIoATiqN FILED JUNE 21., 1905.

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.IAKOB WOJCIEGHOWSKI, OF WARSAW, AND ROMAN PLUZANSKI, OF STOMPERKOW, RUSSIA.

WARP STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed June 21', 1905. Serial No. 266,362.`

To all whom it may concern:

Be it known that we, .TAKoB WoJeIECHoWsKI, residing at Warsaw, Russia, and ROMAN PLUZANSKI, residing at Stomperkow, Russia, subjects of the Emperor of Russia, have invented certain new and useful Improvements in Warp Stop-Motions for Looms; and we do hereby 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. I

This invention relates to a device for automatically stopping the loom as soon as one or more warp-threads is or are broken. The operation of the invention is based on the arrangement that equidistant from one another pendulums are pivotally suspended from a beam which pendulums move with said beam continuously to and fro transversely of and above the warps, and which on the breakage of a warp thread are caused to swing, the swing of the pendulums being produced by the threads when broken being blown into the spaces between the teeth of a stationary rake or comb the thread end being pressed on the forward side thereof by means of slip-springs, whereupon the pendulums at their lower ends meet the raised end of the warp thread and are moved out of their vertical position. The swing of the pendulum effects engagement of pawls connected therewith with the teeth of a'transverse rack-bar arranged above said comb or rake, which rackbar is hereby moved forward. The result of the forward movement of the rack-bar is to throw out of gear the beam to which the pendulums and pawls are secured and to operate a device for stopping the loom by means of a cord and a spring arrangement.

In the accompanying drawings which illustrate the invention Figure 1 is a front elevation, Fig. 2 is a similar view when a warp thread has been broken, Fig. 3 is a view of the air blast pipe, Fig. 4 shows a continuation of Fig. 1, Fig. 5 is a left handv end view of Fig. l, Fig. 6 is a rear elevation of Fig. 1, Fig. 7 is a cross section on the line 7-7 of Fig. 6.

As shown transversely above the warp threads'S (Fig. 1 and 7) is disposed the stationary rake 9 having very narrow pointed teeth 10. This rake 9 carries loosely mounted thereon a rack bar l2 which during the regular operation of the loom does not vary its position, but when subjected to a denite pressure, which takes'place when a warp thread is broken, is moved longitudinally above the rake 9. Parallel to the rake 9 and likewise transversely above the warp is arranged the beam 1l, and which is reciprocated continuously. Beneath the rake and the warp is an air pipe 13 which is provided on the top with orifices 14 (Fig. 3) and is so connected with the beam 11 that upon its longitudinal movement the beam 11 is simultaneously moved therewith. The warp are as shown in Fig. 1 and 2, disposed between the beam 11 and the pipe 13. As shown in Fig. 3 the orifices 14 in the air pipe 13 are arranged iIl groups which are disposed equidistant from one another. Corresponding to the number of groups of oriices which afford an outlet for a current of compressed air there are suspended on the beam 1l pendulums `l5 (Figs. 1, 2 and 6) mounted loosely on the spindles 16 (Fig. 6.) The pendulums 15 are provided beneath with hook-like ends 17 which lie above the openings 14. The hook-like end 17 in consequence of the weight of the pendulum 15 remains in vertical position. On the same spindles 15 as the pendulums are loosely mounted pawls 18 (Fig.'6 and 7) with pins 19 secured on their side faces which pins-during the regular operation of the loom lie on the abutments 20 of the pendulums 15 but when said pendulums are caused to swing the abutting projections 20 are also turned away whereby the pawlsl 18 are allowed to drop and come into engagement with the rack 12.

Above the orifices 14 on the air pipe 13 (Fig. 7) the cross section of which is shown in the same figure, there is secured on the beam l1 the upper part of which is bent at right angles to the spring 21 which is screwed by means of screws 23 (Fig. 1 and 2) to the. beam 11, and to which is secured a cork or another elastic support 22, which serves to press the broken end of the thread on the teeth 10 of the rake 9. The air pipe at its one end (in Fig. 1 and 2 the left hand end) isreduced to fiatter formation similar to that of the end of the beam 11, On this end of the pipe 13 is set a finger 24 the upper end of which enters a notch 25 in a bent lever 26 which is pivotally mounted on the pin 27 secured to the beam 11. 29 is a pawl pivotally mounted at 28 on the lever 26, and carrying a lateral pin 30. 3l is a bar having notches 32 upon its under face in which enter corresponding ridges 33 on the end of the rack 12. During the regular operation of the loom the lever 26,. as shown in Fig. 1, presses with its free end upon the pin 34 of the beam 11, and the finger 24 which enters in the notch 25 connects the air pipe 13 with the beam 11 so that this is reciprocated with the pipe.

In order to facilitate the movement of the beam 11 and the pipe 13 the ends thereof are beneath pointed in a form of a roo and mounted on turned `rollers, 35 36, which are fitted loosely on the shafts 37 and 38 which are fixed on the stationary parts 39 (Fig. 5), which serves to secure the entire construction of the frame of the loom. Besides the rollers 35 and 3G like rollers 40 and 41 are arranged on the opposite ends of the beam and the pipe. For the purpose of obtaining exactly uniform forward motion of the beam 11 and the pipe 13, that is, Ain order that the beam 11 and the pipe 13 on being moved are not shifted out of the vertical plane, the

flattened ends of same are connected both by the said finger 24 and also on one side by means of a clip 43 secured to the end of the beam (Fig. 4) which at its lower' end engages the flat pipe of the part 13.

The bar 31 may be moved upwardly in lateral grooves formed by two guides 44 44 and so lar until the pawl 29 moved therewith engages the teeth of the stationary frame 39 (Fig. 5). The rack 12 is on its' lower lace provided with a pin 46 (Fig. 6) with which is connected a cord or a wire 47, which loops around the pulley 48 and is connected with a suitable device lor stopping the loom. Consequently as soon as on the breakage of a warp thread the rack 12 is moved, at the same time the cord or wire 47 sets in motion the apparatus for stopping the loom.

As is known in the art, the breakage of the warp threads always takes place in the neighborhood of the reed and therefore the device is arranged between the rear warp-beam and the adjoining shaft and therefore in the direct neighborhood of the drum 49 (Fig. 7). The pipe 50 is shown in Fig. 7, and the said pipe 50 serves to lead the air from a compressor or a reservoir filled with compressed air to the air pipe 13 which is of triangular section. The air is led from the compressor into the air pipe always in the same direction as indicated by arrows in Fig. 1 and 2, so that both the operation of the pendulums and the parts connected therewith always takes place on the movement of the beam 11 and pipe 13 in one direction. On motion of the beam and pipe in the opposite direction the air current is interrupted by a suitable leaf valve or the like.

The above mentioned device for stopping the loom in case of breakage of the warp threads operates as follows: As the pipe 13 and the beam 11 move together to and ro along a horizontal path which slightly eX- ceeds the ldistance between the groups of openings 14 during the movement of the pipe 13 all the warp threads are successively subjected to the action of the air current which issues with a certain pressure from the orifices 14 (Fig. 3) the arrangement of the oriiices 14, as shown in Fig. 3 being regular and insuring that the end of the thread will be blown out of the plane of the warps against the comb or rake and will be held there until the slip spring presses the end of the thread on the front side of the rake. When one of the warp threads breaks and the orifices 14 on the movement of the tube come under the broken thread the latter is immediately blown upwards into the space between the teeth 10 of the stationary comb 9 and held in this position by the sliding spring 21 (Fig. 5) provided with a support 22 of cork or like elastic material, which spring as secured to the beam 11 which moves above the warps when the pipe 13 connected with said beam is moved below the warps, the spring 21 with its support 22 pressing with slight friction against the teeth 01": the comb or rake. As soon as the ree end of a broken thread is blown upwardly into the teeth of the rake the spring 22 at once presses the end of the thread against the surface of the rake and tightens the thread so that the pendulum 15 arranged on the other side of the beam meets said threadand is thereby turned on its pivot out of vertical position, as shown in Fig. 2. The pawls 18 which rests with their pins 19 on the proj ections 20 of the pendulums 15, when said pendulum or pendulums swing, drop downwards so that they engage the teeth ol the slidable rack 12, which being now coupled with the beam 11 moves longitudinally therewith. A slight movement of the rakel 12 operates on the cord or wire 47 secured thereto which is connected with the device lor stopping the loom so that the operation ot the loom is interrupted. l`he loom however is not suddenly brought to rest, .but this lakes place approximately within a period ol time necessary lor one rotation of the main shalt oi the loom. Were not special device 'lor stopping the beam 11 provided independent oi the motion ol the loom, the rack l 2 engaged by the pawl 18 would be moved further than required which might injure the stop-motion device connected with said rack 12. In order therefore to be able to stop the beam independently oi the motion o the loom, there is provided a device consisting ol the combina tion of said linger 24 with the lever26, which are arranged at one end of the air pipe and the beam. On the sliding movement ot the rack 12 which moves about l5 millimeters, the ridges 33 on the rack leave the notches 32 of the beam, whereby the beam is raised and herebyli ll s the pawl 29 resting thereon by means oi the pin 30. Hereupon the said pawl engages the teeth ol the sta.- tionary rack 45 disposed above the same. On the beam moving further and therewith moving the pivot of the lever 2G which also serves as a pawl the lever 2li is turned upwards and the linger 24 leaves the notch 25 ot the bent lever 2G. The linger 24 which is thus released moves urther while the beam 11 now set out ot operation interrupts its motion with the pendulums stopped by the broken threads, independently ol the motion of the loom, The swing oi the pendulum indicates the place where a thread is broken so that the weaver can easily ascertain the point and bind the ends together. Aiter the broken thread has been put right the ily wheel oi the loom is turned back whereupon the beam 11 and pipe 13 return to theii` original position where they are again coupled by means oi a spring suitably secured and which was tensioned on the lorward movement ol the rack. 1t is clear that alterations can be made in the construction ol". the members constituting the device: lor instance instead oi the above mentioned rake or comb a bar ribbed on its lower side or covered with rough material such as plush, leather or the like might be used.

The device above described can be used lor weaving material in suitable combinations and with the employment oi different kinds ot threads, even ol the. finest such as silk threads lor weaving plush and the like.

What is claimed as new is:

l. In a warp stop motion for looms, the combination ot a toothed member disposed transversely above the warp threads, a reciprocatory beam, a source ot' supply for com pressed air beneath said member, and means for reciproeatingl the latter and tllebeam in unison.

2. In a warp stop motion i'or looms, the combination ol' a toothed member disposed transversely above the warp threads, a reciprocating beam, a. source of supply lor compressed air beneath said member, and means l'or reciprocating the latter and the beam in unison, and means cooperating with said toothed member to clamp the broken warp thread thereagainst.

3. In a warp stop motion for looms, the combination ol' a toothed member disposed transversely above the warp threads, and means l'or blowing a broken warp thread against said member.

4. In a warp stop motion for looms, the combination ot' a toothed member disposed transversely above -the warp threads, and means for blowing a broken warp thread against said member, and a clamp for clamping the broken thread against said member.

5. In a warp stop ymotion for looms, the combination of a toothed member disposed transversely ab'ove the warp threads and means for blowing a broken warp thread against said member, and a clamp for. clamping the broken thread against said member, a normally stationary rack,

l() a beam adapted to be continuously recprocated, and means on said beam for engagement with said rack.

6. In a warp stop motion for looms, the combination 0f a toothed member disposed transversely above the Warp threads, and means for blowing a broken warp thread against said member, and a clamp for clamping the broken thread against said member, a normally stationary rack, a beam adapted to be continuously reciprocated, and means on said beam for engagement With said rack, and means connecting said beam and air pipe for reciprocating them 2() together.

T. In a Warp stop motion for looms, a continuously reciprocating beam, a stationary rake, a normally stationary reciprocating rack-bar loosely mounted thereon, an air pipe mounted to reciprocate with said beam and pendulnms suspended from said beam for reciprocating said rack bar.

8. In a warp stop-motion for looms, a continuously reciprocating beam, a stationary rake, a normally stationary reciprocating rack-bar loosely mounted thereon, an air pipe mounted to reciprocate with said beam, and pendulums suspended from said beam for reciprocating said rack-bar, and a clamp carried by said beam for clamping a broken thread against said rake.

9. In a Warp stop-motion for looms, a continuously reciprocating beam, a stationary rake, a normally stationary reciprocating rack-bar loosely mounted thereon, an air pipe mountedy to reciprocate with said beam, and pendulums suspended from said beam for reciprocating said rack-bar, and a clamp carried by said beam for clamping a brokenl'thread against said rake, a finger on the air pipe and a pivoted bent lever on the beam and operatively connected With the rack bar.

10. In a warp stop-motion for looms, a continuously reciprocating beam, a stationary rake, a normally stationary reciprocating rack-bar ,loosely mounted thereon, an air pipe mounted to reciprocate with said beam, and pendulums suspended from said beam for reciprocating said rack-bar, and a clamp carried by said beam for clamping a broken thread against said rake, a finger on the air pipe and a pivoted bent lever on the beam and operatively connected with the rack-bar, a stationary rack, and means on said bent lever for engaging the same.

In testimony whereof, we atlx our signatures, in presence of two witnesses.

JAKOB WOJICIECHOWSKI. ROMAN PLUZANSKI.

Witnesses STANISLAW 'PosKsonYM, CYRYL Snnnwlcnr.

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