US2473289A - Passing of warp threads through reeds - Google Patents

Description

June 14, 1949. MElER 2,473,289

PASSING OF WARP THREADS THROUGH REEDS Filed April 13, 1945 .2 Shets-Sheet 1 June 14, 1949.

H. MEIER 8 PASSING F WARP THREADS THROUGH REEDS,

Filed April 13-, 1945 2 Sheets-Sheet 2 y \1 79/ 5 3 3? 6" I I 292 33/ M" V EU 29 fzzireiziofi' Patented June 14, 1949 Heinrich Meier, Uster, Switzerland, assignor to Zellweger A. G., Apparateund Maschinenfabriken Uster, Uster, Switzerland Application April 13, 1945, Serial No. 588,152 In Switzerland April 21, 1944 Claims. 1

This invention relates to the passing of warp threads through reeds.

For this purpose it is known to use devices by which the individual dents of a reed are intermittently divided off and warp threads that had been inserted in a heck of the reed selecting member of the pair of reeding members are passed through the reed by hand or foot operation of the device.

In eflecting this hand or foot operation inadvertently, it may happen. that the reeding members are operated prior to the thread or threads having been inserted in the hook, wherefrom faulty reedings ensue due to the fact that aps are left through which no thread has been drawn. Such faulty reedings must be corrected by time consuming correcting operations. If such faulty readings are not. noticed at the proper time it may even .happen that reeds which have already been drawn in must be subjected to repeated reedin all the way through.

Moreover, the passing of the reeding memmember by hand or foot operation is extremely fatiguing for the operator and this impairs efflciency. If the reading member does not pass through the reed exactly at right angles to the plane of the reed dents a component force will arise which is directed at right angles tothisquently happens that reed dents of a relatively light construction are damaged, in consequence whereof, the drawn in threads are also damaged.

The said devices have the further drawback that the adjustment and adaptation of the reeding members to the various pitches, that is, the spaces between the reed dents, can be carried out only by trial and error which results in a waste of time and unreliable work. Under certain circumstances this adjustment, is only possible by deforming one of the reading members. A still further drawback. consists in that the thread ends must in most cases be kept short and that the passing of the thread through the reed must be effected from below upwards, as a result of which in certain circumstances smooth threads, for example artificial silkthreads, easy drop o of the gaps again.

The. present invention is intended to eliminate the above mentioned drawbacks. It relates to a device for drawing warp threads thro gh reeds, in which device the thread, after being set in the hook of one of the reeding members, actu ates a. ieeler which in turn, actuates' the con.

pling between the constantly running motor and the reading mechanism in such a way that the latter is freed for one complete cycle and thereafter locked again in its initial position.

By this means the passage of the reed selector or upper reeding member is always exactly per-. pendicularly to the plane of the reed dents thus. avoiding the setting up of a. component force which'would impair the functioning of the reed selector and thus the reliability of reed engaging as such. It is advantageous so to design the reeding device that the feeler only permits the reading members to begin their movement when the thread or threads to be drawn in are securely held by the heck of the lower reeding member. The rhythm of inserting and passing the threads throu h the reed is, therefore, determined automatically and is thus no longer dependent upon the operator. This increases the reliability and efficiency of operation and the economy of the reeding device.

For the purpose of adjusting and adapting the reeding members to reeds of various pitches it is advantageous to provide the device with a rotatably adjustable drum whose circumference is graduated so that it can be set in correspondence with a fixed pointer.

The reeding device operates in such a manner that the warp threads are. passed through the reed from above downwards. A very practical thread end stripper is provided which permits of the said ends having a length of at least '8 inches, which makes it impossible for threads, including smooth threads, that have already been drawn in, to drop out again.

One embodiment of the present invention is illustrated, by way of example, in the accompanying drawings in which Fig. 1 shows a side elevation partly in section with the members ready to receive a thread to be drawn in;

Fig. 2 shows aside elevation partly in section with the members in position where the thread has just been drawn in;

, Fig. 3 showsv a cross section of the gear box of' the arm 32 to the holder 36.

rollers 2 are mounted on a bracket 4, one end of which carries a circular plate 5 which serves to deflect the threads and is secured to a gear box 6, which is composed of a lower and an upper part. On the said supporting frame a clamping rail 1 for the reed 8 is rotatably mounted at I, in such manner, that the reed can be pivoted upwards by means of the clamping rail 1 into the vertical chain-dotted position as shownin Fig. 1.

The reed 8 is fastened in the clamping rail tributed at regular intervals along the whole width of the reed. The clamping rail 1 can be displaced in the direction of the reed dents, in accordance with the depth of the reed itself, by means of an auxiliary device which is not shown. Driving motion for the reading device is derived from an electric motor II which is flanged to the gear box 6, as shown in Fig. 4. One end of the motor shaft carries a worm l3 firmly attached thereto and situated within the gear box 6.

The other end of the motor shaft is freely accessible so as to permit of actuating the reeding device by hand for purposes of adjustment when the motor is disconnected. The worm l3 drives a cross shaft l6, which is mounted in the gear box 6, through a worm wheel I4. To one end of the cross shaft I6 is fitted the hub ll of a circular plate I8 for ejecting the threads to be drawn in, on the circumference of which plate four strippers l9 are detachably fitted at regular intervals and project behind the deflecting plate 5.

The cross shaft I 6 drives through a bevel wheel 22 and an appurtenant bevel wheel 23 having an equal number of teeth an auxiliary shaft 24 on which a ratchet wheel 2| is fixed and an eccentric 25 is loosely mounted, the hub of said eccentric being provided with a lateral lug 25'. The lateral lug 25' carries by means of a bolt 26 a pawl 28, which is urged by a spring 21 and for which a bolt 28' serves as a stop, in order to permit the pawl 28, when actuated on its operating arm to have just enough freedom to release the ratchet wheel 2|, but not to allow the pawl 28 to partake of any outward movement beyond this.

With a view to preventing periodic displacements from arising when the strippers l9 remove the drawn threads 26, the number of strippers l9 corresponds to that of the teeth of the ratchet wheel 2|.

The eccentric 25 engages with a fork one of the arms 29 of which (Fig. 3) is fixed to a shaft 3|, which is journaled in the housing, and the other arm 30 is loosely arranged on this shaft 3|. An extension 30 of the arm 30 of the said fork is drawn by means of a spring 29' against a stop pin 29" on the arm 29, running bearing contact be- I ing provided between the cylindrical engaging surface of the eccentric 25 and the engaging surfaces of the fork arms 29 and 30.

The end of the reeding member carrier shaft 3| projects out of the gear box 6 and carries'an arm 32 which is fixed to said shaft 3|. An arm 32 by means of a screw bolt 31 (Fig. 5) a lever arm 38 supporting the reed selector 39 is mounted (Fig. 5). Further, on the reeding member carrier shaft 3| is axially displaceably arranged a holder 36 (Figs. 6 and '7) to which the lower reeding member 30 and a resilient blade 34 are secured by means of a screw 35 (Fig. 5). A stud 32" which is fastened to the arm 32 and engages with a hole in the holder 36 transmits the pivoting movement snapped out into the dash-dotted line position shown in Fig. 5. This is necessary in order to make it possible to insert the reed 8 in the apparatus when operations are started. The reeding member carrier shaft 3| is provided with a threaded end-piece 53 (Fig. 6) on which a drum 52, which carries an internal screw thread and an external graduation, can be screwed by means of said thread into a position of adjustment corresponding with a pointer 36'. A compression spring 54 (Fig. 6) which abuts against the arm 32 and is pocketed in the hub of the axially displaceable holder 36 for bearing on said hub, tends to force the holder 36 axially against the end face of the drum 52.

By appropriately turning the drum 52 lateral spacing between the holder 36 and the arm 32 may be increased or decreased, thus altering the is of U-shaped cross-section (channel section). If the thread, when it is being inserted in the.

apparatus, proceeding from the rear to the front (Fig. 1), is passed around the upper edge 44' of the guide hood 44, it slides over the two edges 44" in the direction of the lower reeding member 33 which is disposed between the two side walls of this guide hood, and to such an extent that it slides of its own accord into the hooks 33' thereof. Numeral 45 designates a feeler 45 which is made of thin wire and which is guided in the guide arm 43 and is mounted by means of a bell crank lever 46 for pivoting movement about an axle 41 which is arranged on a supporting arm 48 which in turn is secured to an axle 49 rotatably mounted in the gear box 6. The free end of this feeler 45 is moved by the thread as soon as the latter enters the hook 33 of the lower reeding member 33. The other end of the feeler 45 is attached to a bell crank 46 pivotable about shaft 41 journaled in guide arm 48. The other end of the bell crank 46, when in the solid line position, bears on the arm 48 and is able to exert attached pawl 5| which is urged by spring 50.

hooked to the gear housing 6. The force of said spring 5|), acting through the pawl 5| serves to. impart a clockwise rotary torque to shaft 49 (see,

Fig. 1). This torque ceases when the feeler 45 is loaded by insertion of a thread. This causes The free end of the guide arm shaft 49 to turn counter clockwise and the move 43 hearing the guide hood 441s swung together.

with thefeeler member 45 and the lev r arm carrying the upperreed reeding member, into the chain-dotted position as showninr'i'gs. I and5'. The drum '52 is adjusted commensurate with the t h o 't reed t b Pre re i r w vin Thereuponthereed 8 is swung together withthe clamping rail '1 intjo'the full line position in Fig. 1', in which position provision is 'made for the lower reeding member-33 to engagetogether with the switch 34 in'the'first g'ap'of the reed to be provided "with oneor more threads; nev r arm 39, guide arm'43, bearing guide hood 44' and'feler 45 are then also pivoted" back into the full line position as shown'in'Fig. l;

When the electric motor I l is started, it serves, through agency of worm l3, wormwheel l4, and cross-"shaft" l6,to'c ause the ejector plate l8, to gether with its four strippers 19, to rotate in the directionof the arrow in Fig. 4, so that the two bevel gears 22"and'23 will cause the auxiliary shaft 24 to rotate counter-clockwise (Fig; 1"). This rotation istransniitted tothe ratchet wheel 2| and the'eccentric 25' with its lug 25"to which the pawl 23 is pivotally attached. The pawl"28', urged by spring'il, remains in engagement with the ratchet wheel 2i; this position is shown'in Fig. 2 Thus'theentire mechanism rhtates about the shaft'24'. Hence the eccentric 25"effects"an oscillatory movement ofthebifurcated arms 29 and 39 whichrest "thereupon, so that an oscil to mov ment 9 th ree n mem 33 nd 39"is produced; This oscillatory movement continues until'the pawl 28strikes pawl-5| as show'n in Fig. I, and this continues so long as the feeler is not depressed by a thread. If the pawl 28 strikes against'thepawl 5|, it will be lifted out of its engagement with ratchet wheel 2| and the loosely mounted edcentric, against the action of the springZ'l; so that'the eccentric 25 will'be prevented from rotating further and will remain.

in its dead center position. The ratchet wheel 2| and also the stripper disk It will continue to Due to stopping of the eccentric 25 in its dead center position, the two reeding members 33 and 39 will remain in their furthest swung-out position as shown in Fig. 1, this is the position in which the device is ready for the reception of a thread.

When one or more warp threads are placed in the hook'33 of the lower reeding member 33, a slight pressure is exerted on the feeler 45 which is sufiicient to rotate the feeler 45 together with the bell crank 45 to which it is attached in a counter-clockwise direction. The stop 46' of the bell crank 46 will thus bear against the carrier arm 48 and also serve to cause the latter to partake of a slight counter-clockwise rotational movement about the shaft 49. This rotation of shaft 49 is transmitted to the pawl 5| which is attached thereto, so that the latter will swing out of the position shown in Fig. 1 and assume the position shown in Fig. 2. Hence the pawl 5| releases pawl 28 so that the latter, under acbe rotated by the motor which remains turned tion of spring 21 again snaps into engagement with "the ratchet'wheel 2 l. The' continuously rotating ratchet wheel 2| thus carries along the pawl thatis' attached to the lug 25' of the eccentric 2-5 and hence causes the eccentric 25 to rotate. The rotation of eccentric 25' causes the forked arms 29 and 30 to swivel. As soon as the pressure of the thread on the feeler 45 ceases, the tension of spring 50 preponderates and serves to'impart a' clockwise motion .to the pawl 5|, the motion being transmitted to arm 48, bell crank 46 and to the feeler 45, so that the latter returns to its original position. Since the ratchet wheel 2| has the same number of teeth as the number of strippers 19 on the stripper disk l8,

and since the two bevel gears 22 and 23 have the same'number of teeth, it makes no difference into which tooth gap of the ratchet wheel 2| the pawl 28 may fall. The rotation of the eccentric 25' causes the fork arms 29 and 30 to swivel whereby the pair of reeding members or selectors 33', 39 execute an alternating motion. As a result of this, the hook 33 of the lower reeding member 33 passes through the reed downwards.

The movement of the reeding members 33 and 39 is initiated by the actuation of the feeler 45,

which is itself. actuated by the thread. The opthrough the reed 8. The inserted thread ends.

are guided along the periphery of the deflecting plate 5 by the stripper l9, and after being released by the stripper I9, they assume, of their own accord, the natural position shown by the dash-dotlines in Fig. 1. The thread is designated by the numeral 201.

Prior to the eccentric 25 and the pawl 28 having rotated through 360 the pawl 51 and the feeler 45 are snapped back to their initial positions by the urge of spring 50 so that the pawl 51 encroaches on the path of the pawl 28. By the said pawl then striking the'pawl 5| the former is retracted from engagement with the'ratchet Wheel 21 so that the rotation of the eccentric 25 is stopped. While the eccentric 25 completes a full rotationthe reading members or selectors 33 and 39 and the resilientt blade 34 execute an alternating "movement, and thus bring the same into engagement with the following gap in the reed 82in the manner already known in'the art. Since the apparatus is arranged to be freely mov able and displaceable on the support tubes 1,

due to the rollers 2 and 3 it is able to follow the from tooth to tooth.

By the rotation of the drum 52, that is, its adjustment to the pitch of the reed, the distance a between the reed selector 39 and the lower reeding member 33 is adapted to the pitch of the reed by means of the threaded end-piece 53. Faulty adjustment of the drum 52 would damage the reed dent lying in the path of the pair of reading members 33, 39 and also the point of the reed selector 39. In order to avoid this eventuality the fork arm 30 loosely mounted on the auxiliary shaft 24 is controlled by the spring 29.

the admissible amount the fork arm 30, being loosely mounted on the auxiliary shaft 24, is swung as indicated in chain-dotted lines in Fig. 3, the tip of the reed selector 39 bearing against the reed dent. In such an event reeding discontinued.

The present reeding device which can be built of any pitch of reed permits the perfect reeding of textile threads of any kind. a

I claim:

1. In a device for passing warp thread material through a reed having a gap therein, a lower movable reeding member and an upper reeding memher, a hook on said lower reeding member for inserting therein the warp thread material to be passed through the gap in said reed by mutual cooperation of said reeding members, a feeler for releasing, by. virtue of said operation of in-' serting said thread material in said hook, said pair of reeding members for passing the said material through said gap, and a prime mover for imparting driving movement to said pair of reeding members.

2. In a, device for passing warp thread material through a reed having a gap therein, a lower movable reeding member and an upper reeding member, a hook on said lower reeding member for inserting therein the warp thread material to be passed through the gap in said reed by mutual cooperation of said reeding members, a feeler for releasing, by virtue of said operation or inserting said thread material in said hook, said pair of reeding members for passing the said material through said gap, a common driving arrangement for said pair of reeding members, an eccentric included in said driving arrangement, a first pawl included in said driving arrangement for movement together with said eccentric, a second pawl included in said driving arrangement for cooperation with said first pawl by the latter pawl striking the former on the completion of each revolution by said eccentric, thereby to arrest said eccentric for intermittently setting said pair of reeding members at rest, and a prime mover for imparting driving movement to said driving arrangement.

3. In a device for passing warp thread material through a reed having a gap, 2. lower movable reeding member and an upper reeding member, a hook on said lower reeding member for inserting therein the warp thread material to be passed through the gap in said reed by mutual cooperation of said reeding members, a feeler for releasing by virtue of said operation of inserting said thread material in said hook, said pair of reeding members for passing the said material through said gap, rotatable stripping means for catching said thread material after its passage through said gap, a relatively stationary defleeting plate provided with a circular rim for cooperation with said stripping means for remov- If the" resistance opposed to the reed selector t9 exceeds ing .from the device said thread material after.

the latter was caught by said means and carrying-it out of reach of said stripping means, a common driving arrangement for said pair of reeding members and said stripping means, and a prime mover for imparting driving movement to said.

driving arrangement.

4. In a device for passing warp thread material through a reed having a gap, 2. lower movable reeding member and an upper reeding memher, a hook on said lower reeding member for inserting therein the warp thread material to be passed through the gap in said reed by mutual cooperation of said reeding members, a feelerfor releasing by virtue of said operation of insorting said thread material in said hook said pair of reeding members for passing the said material through said gap, means for spacing apart said reeding members in the direction of the lengthof the reed, a rotatable drum carrying a graduation for adjusting said spacing of said reeding members to the pitch of a given reed by appropriately rotating said drum as indicated by said graduation, and a prime mover for imparting driving movement to said pair of reeding members.

5. In a device for passing warp thread material through a reed having a gap, a lower movable reeding member and an upper reeding member, a hook on said lower reeding member for inserting therein the warp-thread material to be passed through the gap in said reed by mutual cooperation of said reeding members, a feeler for releasing by virtue of said operation of inserting said thread material in said hook said pair of reeding members for passing the said material through said gap, 2. spring-urged pivotal arm operatively connected with said upper reeding member, a, means for automatically preventing said reeding members from cooperating with eachv other when said pivotal arm swings out against the action of said spring, due to said upper reeding member bearing against a reed dent adjacent to said gap, and a prime mover for imparting driving movement to said pair of reeding members. HEINRICH MEIER.

REFERENCES CITED The following referenlces are of record in the Germany May 17, 1912

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