US2736084A

US2736084A - fleischer

Info

Publication number: US2736084A
Authority: US
Publication date: 1956-02-28
Anticipated expiration: 1973-02-28

Description

Feb. 28, 1956 Filed April 20, 1955 s. s. c. FLEISCHER 2,736,084 DEVICE FOR ENSURING THE CORRECT SEQUENCE OF THREADS IN A WARP 2 Sheets-Sheet l 6 BY INVEZTOR.

ATTOR N EY Feb. 28, 1956 5 s, c, FLE|$HER 2,736,084

DEVICE FOR ENSURING THE CORRECT SEQUENCE OF THREADS IN A WARP 2 Sheets-Sheet 2 Filed April 20, 1955 I NVE OR.

ATTORNEY United States Patent DEVICE FOR ENSURING THE CORRECT SEQUENCE OF THREADS m A WARP Svend Sigurd Christie Fleischer, Chariottenlund, Denmark Application April 20, 1955, Serial No. 502,587

7 Claims. (Cl. 28-22) In the textile industry it is often necessary to ensure the correct sequence of the threads or group of threads of a warp from which the threads or groups of threads have to be separated separately, e. g. when the threads of a warp are to be passed through the various implements of a loom, or when the ends of the threads have to be tied to the threads of a new warp. Where in the following the expression threads is used this shall likewise refer to groups of threads.

It has already been proposed in Patent No. 2,603,852 to ensure the correct sequence of the threads to be separated from a warp by encircling each thread with a stitch loop in a consecutive row of stitchloops. It has hitherto been necessary to perform this encircling process manually which requires considerable time.

The main object of the present invention is to provide a device by means of which the encircling of the threads of a thread layer may be carried out considerably more rapidly than by hand.

A further object of the invention is to provide a device for separating threads or groups of threads singly from a Warp in which the separation may be performed mechanically.

A still further object of the invention is to provide a device of the above type in which the separation of the threads or thread groups may be performed with great accuracy, to the effect that the thread separating member without fail will engage the edge thread of the warp.

Yet an object of the invention is to provide a device of the above type in which means are provided to hold the separated warp thread stationary while being encircled by a stitching thread loop.

These and other objects of the invention will be apparent from the .following disclosure of a device according to the invention, taken in conjunction with the accompanying drawing, in which Figs. '1-5 show schematically the various steps in forming the stitchloops which encircle the threads of the warp,

Fig. 6 is a perspective view of the warp thread separating device, and

Figs. 7 and 8 show two manners of construction of a stitching thread gripping member by means of which the stitching thread is engaged.

Referring particularly to Figs. 1-5, a number of warp threads are indicated by 1, 2 and 3, each separated singly from a thread layer, and each encircled by a stitchloop 6. Each figureillustrates one step of the loop forming process.

The stitch thread 7 is guided by means of a guide member 8 which places the stitch thread along the one side of the separated warp thread 1, while a hooked gripping member 9 is passed through a previously formed stitch loop 6 at .the opposite side of the warp thread 1, see Fig. 1. As shown in Fig. 2 the book of the gripping member 9 has engaged the stitch thread 7 between warp threads 1 and 2, and in Fig. 3 it will be seen that the gripping member 9 has commenced to draw the stitchthread towards the loop 6 through which the gripping 2,736,084 Patented Feb. 28, 1956 member 9 has been passed. In Fig. 4 is will be seen that the gripping member 9 has drawn the stitch thread through the loop 6 to form a new loop, and in Fig. 5 the gripping member 9 is moved up through this new loop at the one side of the next separated warp thread, while the guide member 8 has passed the loop forming stitch thread 7 along the other side of the same warp thread, which subsequently will be engaged by the gripping member in the manner described :above.

The device illustrated in Fig. 6 comprises a carriage 11 provided with wheels 12 running on rails 13 in a suitable frame not included in the drawing. The threads of a warp are indicated by 14 and are clamped between two clamping members 15 and 16 attached in such a manner to any suitable part of the device, not shown, that the warp threads traverse the direction of drive of the carriage 11. By means of a driving shaft 17 journalled in bearings in the carriage 11 the various movable parts of the device are operated. This driving shaft has attached to its one end outside the carriage a pulley 62 which in any conventional manner is operated from a power source not shown in the drawing.

The carriage is moved below the thread layer 14 and is guided in relation to the edge thread of the warp by means of an edge feeler which as shown may comprise a lever 18 fulcrumed on a pin 19 mounted in a fixture 20. The one lever arm has an upwardly turned cam 21 which is held gently against the edge thread of the thread layer by means of a pressure spring 22 interposed between the other lever arm and the carriage base. Further, the device is provided with a bell crank lever 23 fulcrumed on a shaft 24 mounted in the carriage. The one lever arm 25 has a pivot pin 26 for a pawl 27 engaging a ratchet wheel 28 attached to the shaft of the one driving wheel 12. This lever arm 25 abuts resiliently a cam 29 rigidly attached to the driving shaft, the am being subjected to the effect of a spring 30 interposed between the pivot pin 26 and a shaft 31 journalled in the carriage 11. When the cam 29 is rotated the lever 23 will be caused to rock on shaft 24 causing the pawl 27 to rotate the ratchet wheel 28 and with it the driving wheel 12. In this manner the carriage is moved forwardly, and when moved a distance that causes the edge feeler cam 21 to pass beneath the edge thread of the warp, the feeler arm 18 will be depressed by the thread to a position opposite a projection 32 on the lever 23 and thereby prevent the rocking motion of this lever 23.

Consequently the forward drive of the carriage will cease until the edge thread has been removed to release lever 18 and disengage lever 23, which again resumes its rocking motion.

The device is provided with a separating member for separating singly the threads from warp. This separating member consists of a lever 33 attached by its one end to the driving shaft 17. The lever is provided with a longitudinal slot 34 engaging a pin 35 rigidly attached to the one carriage wall. The end .of the lever 33 attached to the driving shaft 17 engages an eccentric 36 rigidly attached to the driving shaft 17. The other end of lever 33 carries a separating finger 37 provided with a hook or notch 38. By means of the eccentric 36 the lever 33 is imparted a movement which causes a notch 38 of the separating finger 37 to perform a looping mo tion as indicated by dotted lines 39. During this movement the notch 38 engages the edge thread 40 and moves it to a resting position beneath a hook 41 on the end of a finger 42 attached to the one end of a lever 43, which has a longitudinal slot 44 engaged by the aforesaid shaft 31. The other end of lever 43 engages an eccentric 45 rigidly attached to the driving shaft 17. By means of the eccentric 45 the lever 43 is imparted such rocking motions that the hook 41 is moved behind the separated warp thread and raised to engage this thread. While in this engaged position the separated warp thread 40 is encircled by a stitch loop 6 formed of the stitching thread 7 by means of the guide member 8 which passes the stitching thread 7 along one side of the warp thread 40. The guide member has a curved arm 46 provided. with a hole 47 through which the stitching thread is passed and from which the thread proceeds through an eye 48 in the end of the arm 46 to the previously formed stitch loop 6. The guide member 8 is mounted on the one end of a shaft 49 journalled in a bearing 50 attached to the carriage 11. The other end of the shaft 49 carries a gear wheel 51 meshing a toothed segment 52 arranged to oscillate on a pin 53 mounted on the carrier 50. The toothed segment 52 has an arm 54 engaging a hole 55 in another arm 56 mounted by its one end on the shaft 31, its other end abutting resiliently an eccentric 57 on the driving shaft 17 by means of a pressure spring 53. By means of the eccentric 57 the guide member 8 is imparted such a movement that it lays ,the stitching thread 7 along one side of the separated warp thread 40. The gripping member 9 is attached to the one end of an arm 59, the other end of this arm abutting resiliently an eccentric 60 on the driving shaft 17 by means of a pressure spring 61. When rotated this eccentric 60 imparts to the gripping member 9 a reciprocating motion during which the gripping member is moved along the side of the separated thread 40 opposite to that along which the stitching thread 7 is placed. Thus the gripping member 9 will engage the stitching thread and move it in the shape of a loop through stitching thread loop 6.

As shown in Fig. 7 the gripping member 9 may be a tubular hook member provided with a tongue 10 formed on the end of a rod 63 arranged within the tubular hook. The lower end of the rod 63 has a book 64 engaging another hook 65 attached to the base of the carriage 11. When the tubular hook member is moved downwards in relation to the rod 63 the tongue 10 will close the hook gap.

In a modified manner of construction the gripping member may be shaped in the manner shown in Fig. 8. In this instance the hooked gripping member 4 is provided with a rocker 5 which in its position shown with full lines closes the hook gap, and in its position shown with dotted lines leaves this gap open.

When the stitch loop 6 is formed around the separated warp thread 40, this thread is engaged by a hook 66 on the end of an arm 67 attached to the carrier 50.

While in the above the device is described to provide a single stitching thread loop around each separated warp thread, or group of warp threads, the invention also in.- cludes the provision of more than one stitching thread loop between two consecutive warp threads, when it is desired to obtain an increased distance between two con.- secutive warp threads. In this case every loop does not encircle a warp thread.

I declare that what we claim is:

l. A device for ensuring the correct sequence of threads in a warp from which threads or thread groups are to be separated singly, comprising a carriage arranged for displacement transversely in relation to the warp, a plurality of wheels mounted on the carriage, a driving shaft rotatably journalled within the said carriage, means for rotating the said shaft, within the carriage a thread separating member for separating threads singly from the warp and operated from said driving shaft, a guide member for a stitch forming thread, means attached to the said driving shaft for actuating the guide member in time with the aforesaid warp thread separating member to place the stitching thread along one side of the separated warp thread, a stitching thread gripping member, means for displacing the gripping member in time with the said thread guide along the other side of the separated warp thread through a previously formed stitching thread loop in order to form a loop encircling the said separated warp thread, and a hook member arranged to engage and hold the separated warp thread with the encircling stitching thread.

2. A device as claimed in claim 1, in which there is provided a feeler member coacting with the edge thread of the warp, a driving mechanism attached to at least one carriage, and means attached to said mechanism for coaction with the said feeler to displace the carriage.

3. A device as claimed in claim 1, in which the warp thread separating member comprises an eccentric attached rigidly to the driving shaft, a lever attached rotatably by its one end to the said eccentric, its other notched end extending to and transversely of the warp, and guide means which in coaction with the said eccentric impart a looping motion to the notched end of the lever.

4. A device as claimed in claim 1, in which the driving shaft has a rigidly attached eccentric, a lever mounted for rotation on the eccentric and extending transversely of the warp, and guide means arranged within the carriage for imparting a rocking motion to the said lever, a hook formed on the free end of the lever to engage and hold a warp thread during the formation of a stitching thread loop around said warp thread.

5. A device for ensuring the correct sequence of threads in a warp from which threads or thread groups are to be separated singly, comprising a carriage arranged for displacement transversely in relation to the warp, a plurality of wheels mounted on the carriage, a driving shaft rotatably journaled Within the said carriage, means for rotating the said shaft, within the carriage a thread separating member for separating threads singly from the warp and operated from said driving shaft, a guide member for a stitch forming thread comprising a curved arm having an eye in the one end thereof for the stitching thread, a driving mechanism connected to the other end of the curved arm, power transmission means interposed between the said driving mechanism and the driving shaft to impart reciprocating swinging motion to the curved arm in time with the aforesaid warp thread separating member to place the stitching thread along one side of the separated warp thread, a stitching thread gripping member, means for displacing the gripping member in time with the said thread guide along the other side of the separated warp thread through a previously formed stitching thread loop in order to form a loop encircling the said separated warp thread, and a hook member arranged to engage and hold the separated warp thread with the encircling stitching thread.

6. A device as claimed in claim 5, in which the stitching thread gripping member comprises a tubular hook, a stationary rod within the tubular hook and means coacting with the driving shaft for imparting a longitudinal displacement of the tubular hook in relation to the said rod so that the latter alternately opens and closes the hook gap.

7. A device as claimed in claim 5, in which the power transmission means for operating the curved guide arm comprises a shaft rigidly attached to the curved guide arm, a gear wheel on said shaft, a toothed segment meshing said gear wheel, an arm extending from said toothed segment to a lever mounted within the carriage, said lever abutting a cam attached to the driving shaft.

References Cited in the file of this patent UNITED STATES PATENTS 657,171 Mann et al Sept. 4, 1900 2,200,280 Klumpp et al. May 14, 1940 2,603,852 Fleischer July 22, 1952 2,673,537 Eastman Mar. 30, 1954 new