US1133830A

US1133830A - Machine for piecing together the threads of warps.

Info

Publication number: US1133830A
Application number: US73723212A
Authority: US
Inventors: Max Wenzel
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-12-17
Filing date: 1912-12-17
Publication date: 1915-03-30
Anticipated expiration: 1932-03-30

Description

M. WENZEL.

MACHINE FOR PIEGING TOGETHER THE THREADS 0P WARPS.

APPLICATION FILED DEC. 17, 1912.

INVEN OR MAX WE NZ E L RWWSWQQ ATTORNEY THE NORRIS PEIERL :0. PHOIO-LIIHQ. WASH/NGiOII. D c

M. WENZBL.

MACHINE FOR PIEGING TOGETHER THE THREADS 0F WARPS.

APPLICATION FILED 1330.17, 1912.

Patented Mar. 30, 1915.

6 SHEETS-$111131 2.

F I G 2 k lNvENToR Wamassas MAY WENZEL ATTORNEY THE NORRIS PETERS 20.. PHQTO-LITHQ, WASHINGTON. 0. c.

M. WENZEL.

MACHINE FOB. PIEGING TOGETHER THE THREADS OF WARPS.

APPLICATION FILED DEC. 17, 1912.

. Patented Mar. 30, 1915.

1 HE NORRIS PETERS CO. I=I-lon.1-L!'|l-mvv WASHINGTON, D. c

6 SHEETS-SHEET 3.

lNVENTOR MAX WENZEL.

M. WENZEL.

MAGHINE FOB. meme TOGETHER THE THREADS 0P WARPS.

APPLICATION FILED DEC. 17, 1912.

Patented Mar. 30, 1915.

6 SHEETS-SHEET 4.

INVENTOR MAX WENZEL. AHQMW Q l ATTORNEY I THE NORRIS PETERS 60.. PHOT0-LITHO., WASHINGTON. D. c.

M. WENZEL.

MACHINE FOR. PIEGING TOGETHER THE THREADS 0P WARPS.

WITN E55 5% APPLICATION FILED DEG. 17 1912.

Patented Mar. 30, 1915.

6 SHEETS-SHEET 5.

THE NORRIS PETERS Ca, PHOTO-LITHO.. WASHINKIZTON. D. L.

INVENTOR MAX WENZEL GQMSMWA ATTORNEY M. WENZEL.

MACHINE FOE PIEGING TOGETHER THE THREADS 0F WARPS.

APPLICATION FILED DEO.17, 1912.

1,133,830. Patented Mar.30,1915.

6 SHEETS-SHEET 8.

INVENTOR MAX WENZEL ATTORN EY "HE NORRIS PETERS 60.. PHOTO Lrrna. WASHINGTON. n. c

MAX WENZEL, or sienna/refine, GERMANY.

MACHINE FOR PIECING TOGETHER THE THREADS OF WARPS.

Application filed December 17, 1912.

T all whom it may concern:

Be it known that I, MAX WENZEL, a citizen of the Empire of Germany, residing at No. 18 Miihlenstrasse, Spremberg, Kingdom of Prussia, Empire of Germany, have invented certain new and useful Improvement in Machines for Piecing Together the Threads of Warps, of which the following is a specification.

In the process and the apparatus according to the patent application S. N. 7144 16 and 7 14447 the piecing of the ends of warp lying side by side is operated by spinning or whipping, and this is done by means of one single piecing tool. Also all other appliances known hitherto for piecing the ends of warp threads, as, for instance, warp thread attaching and warping appliances are possessed of only one single tool for operating the piecing of the threads. Consequently, in all known machines only the piecing of one pair of threads during one operation of the machine is possible. Now, the number of operations of all these appliances during a certain unit of time is limited by the fact that the speed of the secondary appliances for parting and feeding the threads to be pieced cannot exceed a certain rate. Besides, the maximum speed of working depends upon the material to be worked, because, of course, threads of bad, easily breaking material cannot stand the same speed of working as threads of better material. It is therefore impossible to surpass per hour a number of threads of as great as 6000 to 8000 with the machines and appliances known, even in straining their parts to the utmost by working them with the highest speed which is safe; and only one machine working with a knotting tool has surpassed this number.

By arranging a number of whipping appliances side by side, each having to handle a pair of threads, an apparatus constructed according to this invention is able to piece together a number of threads simultaneously at each stroke thereby increasing the output many times without increasing the number of strokes per unit of time, thus combining maximum safety with maximum output. This capacity of enabling a number of piecing appliances to be arranged side by side differentiates the improved apparatus from all hitherto known devices for piecing warp threads, such as twisting and tying devices, all of which comprise only one piecing ap- Specification of Letters Patent.

Patented Mar. 30, 1915.

Serial No. 737,232.

pliance, so that only one piecing can be effected at each stroke.

The drawings illustrate a form of appa ratus comprising a number of whipping appliances for piecing together a number of pairs of threads at each stroke of the apparatus.

In these drawings: Figure 1 is a perspective diagrammatic general view of the 00 operating devices, Fig. 2 being a plan, Fig. 3 a rear elevation, and Fig. 4 a side elevation thereof, Figs. 5, 6, 7 and 8 illustrate details of the device employed for separating and conveying the ends of the threads to be pieced, and gripping and severing the same.

In the apparatus comprising several whipping appliances (Figs. 1 to 8) the whipping appliances 6 (Figs. 1, 3, 4, 6) have the form of disks with teeth 2 and radial insertion slots 3 for the threads. In each whipping appliance one separate thread is used for whipping around the warps, which thread is fed to the appliance in the same manner as described in applicants Patent 1,098,308. In the example shown, three such whipping appliances are arranged side by side. They are mounted so as to be capable of rotary movement but not of axial sliding movement in a plate-shaped carrier 4 which is movable parallel to itself along the warp threads. The plate-shaped carrier a slides on fixed guide bars 5, 6 that are fixed to the

sides

7, 8 of the framing. The carrier 4 of the whipping appliances 6 receives its parallel motion along the warp threads as above stated for the purpose of carrying the whipping thread in some path or other toand-fro along the warp threads. The path chosen in the example shown in the drawings, is indicated at D in Fig. 3. Since at each operation of the machine the carrier 4 of the whipping appliances is required to make a movement only during the actual whipping process, the said movement may be produced by means of a suitable shaped cam 9 on a cross shaft 10 which is driven in the ration 1:1 from the main shaft 11 (Figs; 3 and 4) of the machine. This shaft 11 makes one complete revolution for each complete operation of the machine and is driven for instance by an electric motor 12 (Fig. 3) through a worm 13 and worm wheel 14. This worm wheel is not fixed directly on the main shaft 11 but is loose thereon and is connected thereto by a clutch 15 slidable along the shaft 11. This clutch has a breaking cone 16 which engages a fixed female cone 17 when the clutch 15 is moved into engagement by electromagnetic or mechanical means by the thread stop motion devices when the check thread is absent as hereinafter described.

On the shaftlO there are preferably provided two cams 9 each of which acts upon a lever 19 in opposition to a spring 18. The levers 19 have a common rocking axle 21 and the free ends of their arms are connected together by a cross bar 22 attached to a link 20 the other end of which engages a fork 23 fixed on the carrier 4 of the whipping appliances.

The whipping appliances e receive their rotary motion in common from the main shaft 11 of the machine. On this shaft is a toothed wheel 24 (Fig. 4) the teeth of which extend over only grds of its circumference, which is adapted to engage a smaller intermediate wheel 25 on an intermediate shaft 26. On this latter shaft is a spur wheel 27 with broad teeth engaged by a spur wheel 28 on the the carrier 4. The teeth of the wheel 27 are sufficiently broad to prevent the

wheels

27 and 28 from coming out of engagement during the parallel motion of the carrier (Fig. 2). The wheel 28 engages the ring of teeth 2 of the whipping appliance e and also a small intermediate wheel 29 which transmits its motion to the driving wheel 28 of the whipping appliance e and engages a second small intermediate wheel 29 which in its turn engages the driving wheel 28 of the whip ping appliance 6 The direct transmission of the rotary motion from one whipping appliance to the other is necessary because the whipping appliances when stationary must always have their insertion slots 3 coinciding with the respective insertion slots 3 in their carrier 4. Vertically below and parallel to the axis of rotation of the middle whipping appliance 0 there is arrangedrso as to be rotatable but axially immovable in fixed bearings a shaft 30 which carries 0pposite to each other. two rings of

teeth

31, 32 the tooth spaces of which receive each one end of a warp thread in such a manner that corresponding spaces contain those warp threads which are to be pieced. For the purpose of facilitating the introduction of the warp threads in the plane of the warp and preventing their removal from the tooth spaces during the piecing operation, pairs of

guide wires

33, 34, are arranged directly adjacent to the rings of

teeth

31, 32 and preferably on both sides thereof. These wires are fixed to the

sides

7 and 8 of the framing. The shaft 30 is 0 caused to rotate step by step by a ratchet mechanism the ratchet wheel 35 (Fig. 4) of which is fixed on the shaft while the pawl 36 rotates together with the spring pawl 37 loosely on the shaft 30. The pawl 36 is connected by means of a connecting rod 38 to a slide 40 guided vertically in a guide 39 on the outside of the frame wall 8. This slide is moved downward in opposition to an upwardly pressing spring 41 by a tappet 42 on a shaft 43 parallel to the main shaft. According as the rings of

teeth

31, 32 are to be advanced only one tooth or a number of teeth, the shaft 43 is rotated. in the corresponding ratio by means of

spur wheels

44, 45 from the main shaft 11. As the pitch of the

teeth

31, 32 corresponds to the dis tance of the whipping appliances 3 from one another, the pairs of warp threads to be pieced are brought by the

teeth

31, 32 each time into the correct position below the

insertion slots

3, 3. (Fig. 4). The warp threads can then be raised in pairs in the manner wellknown in twisting machines out of the plane of the warp into the whipping appliances. It is however necessary first to efiect a complete separation of the threads from one another over their entire length between the rims of

teeth

31, 32 so that later on only those ends of the warp threads which belong to each other shall lie close to each other. For this purpose a separating device is provided the separators of which are moved along the warp threads after each separator has engaged only one warp thread. The separators consist of grippers of forks 46 arranged on common carriers 47 47 and fixed to endless bands or

chains

48, 48 which are mounted on guide rollers49, 50, 51 and 49, 50, 51. The

carriers

47, 47 of the separators 46 have guide

arms

52, 52 which are adapted to slide in

guides

53, 53 fixed to the frame sides 7, 8 (Fig. 4). These separators 46 also serve to secure the parallel position of the warp threads relatively to one another so that they can be securely grasped by the grippers or tongs which convey the Warp threads into the whipping appliances.

The

endless belts

48, 48 with the separators are driven from the main shaft 11 (Figs. 2, 3, 4) by means of bevel wheels 54, 55, cross shaft 56,

bevel wheels

57, 58, vertical shaft 59, bevel wheels 60, 61 and cross shaft 62. On the latter shaft is a spur wheel 63 gearing with a spur wheel 64 on the extended axle 65 of the guide roller 49.

On the extended axle 65 is a second spur wheel 66 gearing with an intermediate wheel 67 on a pin 68 parallel to the axle 65, which wheel gears with a spur wheel 69 on the extended axle 70 of the guide roller 51. vThe ratio must be such that a group of gripping devices, cut away from their holding clamps K and K and inserted into the insertion slots of the whipping appliances. The separation of the warps and the clamping thereof in the desired position in clamps K, K is also effected in the manner described in Patent 1,098,308. The clamps in that patent corresponding to the clamps K, K of the present application are numbered 120 and 121. One of these gripping devices with severing devices is shown in Figs. 6, 7, 8. The grippers for all the pairs-of threads are connected together by a common cross piece 71, 71 which is guided by means of vertical guide bars 73, 73 in guides 7 2, 7 2 which are fixed together with the guides 5 and 6 of the carrier 4 of the whipping appliances to the frame sides 7, 8. The upper ends of the guide bars 73, -73 carry pins or

rollers

74, 74 by means of which they engage in

cam grooves

75, 75 of cams fixed on a common shaft 76. The shaft 76 is driven from the main shaft 11 in the ratio of 1:1 by means of spur wheels 77, 78 (Figs. 2, 3, 1). The gripping devices consist of forks each having three

prongs

79, 80, 81. The two side prongs 79 and '81 are bent outward while the middle prong is wider and is formed on one side with a cutting edge (Fig. 8). Parallel to the plane of the prongs there is pivoted on a pin 82 on the fork a hook 83 the shank of which carries a spring clamping jaw 84 which cooperates with a clamping jaw 85 fixed on the fork behind the middle prong 80. To the hook 83 there is fixed a small tooth segment 86 gearing with a toothed segment 87 which is pivoted on a pin 88 on the fork. The segments 87 are under the influence of springs 89 which have a tendency to turn the segments in such a manner as to cause the hook 83 to assume the open position shown in full lines in Fig. 7.

The segments 87 of each group of grippers are connected together by a connecting rod 90 one end of which is connected to a lever 91 whose pivot 92 is fixed on one of the outer forks of the group. In the descent of the gripping devices the lever 91 strikes with its free end against a fixed stop which moves it into the position shown in dotted lines in (Fig. 7). In this movement a spring pawl 93 drops over the lever 91 or a projection thereof so that this lever retains the position shown in dotted lines in Fig. 7 during the following ascent of the gripping devices.

In the movement of th lever 91 from the drawn out position into the dotted position shown in Fig. 7 all t'he segments 87 make a corresponding rotation which causes the hooks 83 to pass from the drawn out position shown in Fig. 7 into the dotted position. By this means the gap between the

prongs

79, 80 of the forks is closed by the hook and the warp thread that has entered this gap is shut in by the hook, while the other warp thread is clamped by the spring jaw 81 on the shank of the hook 83 and the fixed jaw 85 and the end of this thread is severed behind the clamping point by the cutting edge on the middle prong 80. This severing action can be improved by providing a counter cutting edge (Fig. 8) on the shank of the hook 83 which moves close above the middle prong 80. After the threads (6 and I) have been taken up and severed alternately in this manner the gripping devices are moved up by the

cams

75, 75. These cams are formed so that the raised position will be maintained so long as is necessary for the following whipping operation. On the next downward movement of the gripping devices the lever 93 must be disengaged in order that the ends of the warp threads which are held by the grippers shall be released and the grippers shall assume a position ready for receiving the next warp thread ends. For this purpose at the commencement of the downward movement a pivoted spring shoulder 94 on the pawl 93 strikes a fixed stop 95 which the pivoted part 94 was able to avoid in the upward movement and is disengaged so that the springs 89 can act and return the grippers into the position shown in full lines in Fig. 7.

For the purpose of returning the whipping appliances always and exactly with the insertion slots 3 of their carrier, when the whipping operation is completed, there are provided braking and locking devices which in engaging the teeth 24. of the driving wheel of the main shaft 11, are disengaged and engaged when the teeth 24tleave the wheel 25.

The several threads are taken singly out of the lease by means of suckers 96 (Fig. 5). For each lease there is provided a pair of suckers of which each works on one side of the lease. The mouths of the suckers are of trough shape. These troughs extend along the warp threads which are to be taken by the respective sucker from the lease. The mouths of the suckers which operate in the middle of the lease are arranged transversely to the warp threads which are not to be taken by the said sucker and they force back the threads which are not yet pieced. In front of the suction aperture which is recessed in the mouth-piece, a spring looking pin 97 is passed transversely through the mouthpiece. This locking pin is mounted on the arm 98 of a bell crank

lever

98, 100, pivoted on a pin 99 on the sucker 96. The arm 100 of this lever is forced back by a fixed stop 101 when the sucker is in its position of taking up, in such a manner that the locking pin 97 leaves the mouthpiece aperture for the entry of the thread unobstructed. Immediately the sucker leaves its taking up position, the arm 100 leaves the fixed stop 101 and it is forced by its spring 102 into the locking position.

In order that the locking pin 97 shall release the thread after the latter has entered the corresponding toothed space of the ring of teeth, a bell crank lever pivoted on an upwardly directed bracket 143 on the sucker strikes with its arm 144 against a correspondingly fixed stop 146 while the arm 145 of the bell crank lever acts upon the arm 100 of the locking pin lever with a tendency to raise the locking pin 97. Normally the bell crank

lever

144, 145 is forced with its arm 144 by a spring 147 against the stop 148 V on the bracket 143 whereby the bell crank lever is secured in its rest position.

In order to impart to the sucker the necessary motion for conveying the taken up thread into the gap of the corresponding ring of teeth, the sucker 96 which is formed as a tube, is pivoted by means of a cock pluglike pin 103 on the lower end of a hollow arm 104, the eye 105 of which receiving the pin 103 is constructed in the form of a cock casing. The bores of the eye 105 and of the plug like pin 103 are so arranged and dimensioned that their complete openings will coincide with each other when the sucker is in its taking up position (Fig. 5 left hand side). On the upper end of the hollow arm 103 there is also formed an eye 106 having the shape of a cock casing rotatable on a hollow pin 107 which is fixed and from the bore of which there extends a side aperture coinciding with the bore 108 of the eye 106 in the taking up position of the sucker 96. The hollow pin 107 is fixed to a suction pipe. The arrangement is such that the current of the suction is controlled by the movements of the sucker 96 and the arm 104 so that the suction will be operated only in the taking up position of the sucker.

The arm 104 is fixed to an inclined arm 109 engaged by a crank rod 110 which engages at its other end a crank pin 111 on a crank shaft 43 that is parallel to the main shaft 11. The shaft 43 is driven from the main shaft-11 by means of

toothed wheels

44, 45 in the ratio of 3:2, two pairs of suckers being provided which operate alternately and together have to deliver three pairs of threads for each operation of the machine. In addition to their to-and-fro motion the suckers must also have an up and down motion because they must be moved out of the path of the delivered warp thread when they are in position for delivering the thread. For this purpose rocking links 115 having a variable longitudinal elasticity are provided which are adapted to rock on a common pin 116 and are pivoted at their lower ends to the suckers 96. At their upper ends the links 115 have a lateral guide pin 117 which moves in a guide curve 119 which is closed upon itself and is provided with'a spring switch tongue 118.

For the purpose of checking the groups of threads, each of thread of the lease is preferably passed at each side of the lease over a separate rod 120 (Fig. 1) so that it is situated on a higher level outside the lease than the other threads. In this higher position the check thread C is able to act upon the

stop lever

121, 122 of which the lower arm 121 carries at its end a shoe 123 arranged across the length of the warp. The stop lever is pivoted on a fixed pin 124 and the free end of its upper end 122 projects into the path of the contact piece 126 arranged on a stop disk 125 so that by means of the stop lever 122 and the contact piece 126 an electrical circuit can-be closed containing a source of current and the stopping electromagnet E (Fig. 2). The stop disk 125 is moved onward by ratchet mechanism 127 to 134 the number of the step by step movements corresponding to the number of the threads comprised in one stop group. The ratchet wheel of the stop disk can have only a determined number of teeth. It is however not always possible to make the number of threads in the check groups equal in all warps. Therefore means must be provided to enable the number of step by step movements of the stop disk 125 to be varied according to the varying number of threads in the check groups. This can be done without difiiculty by arranging the stop disk 125 so as to be capable of being rotated forward and backward and providing it with two oppositely working ratchet mechanisms whose ratchet wheels have the same number of teeth. It is then merely necessary to provide an automatic reversing of the two ratchet mechanisms and to arrange on the stop disk in addition to the contact piece 126 a removable contact piece 126 which is fixed by the contact piece 126 on the stop disk 125 in accordance with the number of step by step movements or pitch corresponding to the number of threads. The drawings (Figs. 1, 2, 3) show a construction of a checking apparatus of this kind. 127 and 128 are the two oppositely acting ratchet wheels which are fixed on the shaft 129 of the stop disk 125 and in which

pawls

130, 131 are adapted to engage. Both these pawls are fixed to a lever 132 and are pivoted on a common pin 133 which is fixed to a ratchet lever 134. To the latter is connected a connecting rod 135 which receives to-and-fro motion from a cam 136 on the transverse shaft 56. The

pawls

130, 131 are reversed according to the desired direction of rotation of the stop disk 125 by means of two reversing

levers

137, 138, pivoted on a common shaft 112 parallel to the shaft 129. Each reversing lever has a toothed rims locking are 149 and 149 respectively fiXed to it into which a

spring

153 or 153 acting upon a bell-

crank lever

151, 152 or 151, 152 has a tendency to force a locking

150 or 150 which is mounted on the

arm

151 or 151 of the bell-crank lever (Figs. 1 and 3). The locking mechanism serves to hold each reversing lever in opposition to the action of a

spring

113, 114 on its other and upwardly directed

arm

137 or 138 in the position shown in Figs. 1, 3 and 4. The levers are released by means of

removable pins

154, 154 provided on the stop disk 125, as soon as the one or the

other contact piece

126 or 126 has moved into the contact position, so that one or the

other pin

154, 154 acts upon the corresponding releasing

lever

151, 152 or 151, 152. The

spring

113 or 114 then imparts to the respective reversing lever a rotation such that it will rotate the common arm 132 of the

pawl

130, 131 into the other position and thus cause the other pawl to engage with its ratchet wheel. The stop disk will then be rotated in the reverse direction. The immediate returning of the corresponding reversing lever after reversal is efiected by means of side pins 155, 155 of a slide 156 which receives a continuous to-and-fro motion through a connecting rod 157 and crank 158 from a shaft 159 which is driven from the shaft 56 in the ratio of 1:3, so that the slide is moved to-and-fro once at every double stroke of the pawl. The

pins

155, 155 act upon the upwardly directed

arms

137 and 138 of the reversing

levers

137, 138. On reaching the position of rest the looking

150 or 150 enters again into the locking are 149 or 149. The closing of the circuit effected by the checking apparatus energizes the electro-magnet E (Fig. 2) the armature 140 of which is movable in oppo- .sition to a spring 139 and serves as a support for a weighted lever 141 which on being released swings down and by means of the disengaging lever 142 fixed to it shifts the clutch part 15 on the main shaft 11 in such a manner that thecoupling of the shaft 11 with the worm wheel 14 is opened and the brake cone 16 is driven into the fixed female cone 17 whereby the main shaft 11 is disconnected and stopped immediately.

The operation as a whole of the apparatus is as follows :The warp threads of the two warps that it is desired to be pieced together which are to be fed simultaneously to the whipping appliances e are taken up singly by the

suckers

96, 97 and transferred upon the successive gaps of the stepwise rotating 31, 32 from which they are brought finally under the slot shaped opening in the whipping appliance 6. At the ,same time theseparating means 46, 47, fixed to the

endless bands

48, 48, moving in opposite direction, separate the threads and place them in parallel position. Now the warp threads which lie exactly parallel the one neXt to each other and in a straight line, are each taken up by one of the whipping appliances to which a separate whipping thread is fed as described in Patent 1,098,308 and the whipping takes place in the same manner as described in that patent except that here it takes place simultaneously in the three whipping appliances. The finished threads are then fed farther by the

toothed rims

31, 32. If one of the controlled threads C should miss, the two warps so far as the controlled threads are concerned will not agree so that when the machine proceeds wrong threads of both warps will be pieced and in such case the stopping mechanism will enter into operation by the dropping of the lever on 121. The machine is stopped thereby and the mistake can be corrected at once before as might have happened before, a number of the wrong threads of both warps have been pieced together which had afterward to be separated again.

What I claim is:

1. In a machine of the kind described for piecing together the ends of warp threads, a number of whipping appliances arranged side by side and means for simultaneously conveying a pair of threads to each whipping appliance, essentially as described and for the purpose set forth.

2. In a machine of the kind described for piecing warp threads, the combination of a plurality of whipping appliances arranged side by side and each provided with an inserting slot; means for guiding thereto the ends of the warp thread to be pieced; coaxially arranged toothed rings one for each set of warp threads, the pitch between the teeth thereof being equal to the required width between the threads to be pieced, each ring being adapted to receive in the gap between adjacent teeth one thread to be pieced; and means for rotating said rings step-by-step.

'3. In a machine of the kind described for I piecing warp threads, the combination of a plurality of whipping appliances arranged side by side and each provided with an inserting slot; means for guiding thereto the ends of the warp thread to be pieced; coaxially arranged toothed rings one for each set of warp threads, the pitch between the teeth thereof being equal to the required width between the threads to be pieced, each ring being adapted to receive in the gap between adjacent teeth one thread to be pieced; means for rotating said rings stepby-step; means for separating the warp threads in said gap over the entire length and holding the separated threads in the right position for insertion into the whipping appliances for subsequent whipping.

1 In a machine of the kind described for piecing warp threads, the combination of a plurality of whipping appliances arranged side by side and each provided with an inserting slot; means for guiding thereto the ends of the warp thread to be pieced; coaxially arranged toothed rings one for each set of warp threads, the pitch between the teeth thereof being equal to the required width between the threads to be pieced, each ring being adapted to receive in the gap between adjacent teeth one thread to be pieced; means for rotating said rings stepby-step; separators to hold the warp threads between the toothed rings over the entire length and for holding the warp threads in the right position for inserting into the whipping appliances, said separators being mounted between said rings for movement along the warp threads; and means for moving the separators in the same direction along the warp threads.

5. In a machine of the kind described for piecing together the ends of warp threads, a number of whipping appliances arranged side by side; means for simultaneously conveying one pair of thread ends to each whipping appliance; one pair of lease rods each for each warp end; one spaced lease rod for each m thread of each warp end, which special lease rod is located higher than the corresponding lease rods; a contact lever in whose path the threads running over the higher special lease rod are located; a stop disk (125) a contact (126) mounted on the said stop disk; means for rotating the stop disk with the contact piece in proportion to the feeding of the thread and a stop circuit which may be closed by the contact lever and the contact piece (126) when one of the check threads guided over the higher lease rods is missing, essentially as described and for the purpose set forth.

6. In a machine of the kind described for piecing together the ends of warp threads, a number of Whipping devices arranged side by side; means for simultaneously conveying one pair of thread ends of each whipping appliance; one pair of lease rods each for each warp end; one special lease rod for each tenth thread of each warp end, which special lease rod is located higher than the corresponding lease rods; a contact lever in the path of which the threads running over the higher special lease rod are located; a stop disk; a contact mounted on said stop disk; means for rotating the stop disk with the contact piece in proportion to the feeding of the thread; a stop circuit which may be closed by the contact lever and the contact piece when one of the check threads guided over the higher lease rod is missing; a removable contact piece (126' mounted upon the stop disk; two ratchets operating in opposite direction which can be made to cooperate alternately with the stop disk reversible pawls mounted upon said ratchets and means for reversing these pawls in order to reverse the motion of the stop disk when either the fixed or the movable contact piece have reached the contact position, essentially as described and for the'purpose set forth.

7. In a machine of the kind described for piecing together the ends of warp threads, a number of whipping appliances arranged side by side; means for simultaneously conveying one pair of thread ends to each whipping appliance; means for holding in position both the warp ends that have to be pieced together; one pair of lease rods for each warp end for producing leases; two suckers each for each lease to draw out the single thread ends; means for making the suckers operate alternatcly to the right and to the left in the corresponding leases at the place where the threads cross each other; and mouth pieces for the suckers which serve for pushing away in the leases the threads which should not be drawn out, essentially as described and for the purpose set forth. 5

8. In a machine of the kind described for piecing together the ends of warp threads, a number of whipping appliances arranged side by side; means for simultaneously conveying one pair of thread ends to each whipping appliance; means for holding in position both the warp ends that have to be pieced together; one pair of lease rods for each warp end to produce leases in the warp ends; two suckers each for each lease to draw out the single thread ends from the lease; means for making the suckers operate alternately to the right and to the left in the corresponding lease at the place where the threads cross each other; mouth pieces for the suckers; grooves in these mouth pieces running in the direction of the thread which is to be drawn out of the lease and suction openings in said mouth pieces located deep in the grooves, essentially as described and for the purpose set forth.

9. In a machine of the kind described for piecing together the ends of warp threads, a 7

number of whipping appliances arranged side by side; means for simultaneously conveying one pair of thread ends to each whipate alternately to the right and to the left in the corresponding lease at the place where the threads cross each other; mouth pieces for the suckers; grooves in these mouth pieces running in the direction of the thread which is to be drawn out of the lease; suction openings in said mouth pieces located deep in the grooves; automatic locking de-' vices for holding the sucked thread in the mouth piece of the sucker; means for moving the suckers from the leases to the whipping appliance and vice versa; and means for cutting ofl the suction current from the suckers during the motion of the latter from the leases to the whipping appliance, essentially as described and for the purpose set forth.

10. In a machine of the kind described for piecing together the ends of warp threads, a number of whipping appliances arranged side by side; means for simultaneously conveying one pair of thread ends to each whipping appliance; means for holding in position both the warp ends that have to be pieced; one pair of lease rods for each Warp end to produce leases in the warp ends; two suckers each for each lease, to draw out the single thread ends from the lease; means for making the suckers operate alternately to the right and to the left in the corresponding lease at the place where the threads cross each other; mouth pieces for the suckers; grooves in these mouth pieces running in the direction of the thread which has to be drawn out of the lease; suction openings in said mouth pieces located deep in the grooves; automatic locking devices for holding the sucked thread in the mouth piece of the sucker; means for moving the suckers from the leases to the whipping appliances and vice Versa; hollow rods in the sucker joints in these hollow rods and cook shaped joint pins in the joints, essentially as described and for the purpose set forth.

In testimony whereof I aflix my signature ,in presence of two witnesses.

MAX WENZEL. lVitnesses:

GEORGE A. MAKINSON, PAUL WALTHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of .Eatents. Washington, D. G.