US2946177A

US2946177A - False twisting machines

Info

Publication number: US2946177A
Application number: US610426A
Authority: US
Inventors: Ernest P R Scragg; Dobson Austin
Original assignee: Ernest Scragg and Sons Ltd
Current assignee: Ernest Scragg and Sons Ltd
Priority date: 1955-09-30
Filing date: 1956-09-17
Publication date: 1960-07-26
Anticipated expiration: 1977-07-26

Description

July 26, 1960 E. P. R. SCRAGG ETAL 2,946,177

FALSE TWISTING MACHINES 4 Sheets-Sheet 1 Filed Sept. 17. 1956 Inventor: ZI'MFZffi/Q/EMW July 26, 1960 E. P. R. SCRAGG ETAL 2,946,177

' FALSE TWISTING MACHINES Filed Sept. 17, 1956 4 Sheets-Sheet 2 19 I 19 lin iiii MW? WW AWN, I

|1"'" I v Hm" 5 m 39 m \i/ A tlomeys.

July 26, 1960 E. P. R. SCRAGG ET AL FALSE TWISTING MACHINES Filed Sept. 17, 1956 4 Sheets-Sheet 3 July 26, 1960 E. P. R. SCRAGG ETAL 2,946,177

v FALSE TWISTING MACHINES Filed Sept. 17, 1956 4 Sheets-Sheet 4 Invmtorr A ttorneg;

FALSE TWISTING MACHINES Ernest P. R. Scragg and Austin Dobson, Macclestield, England, assignors to Ernest Scragg & Sons Limited, Macclesfield, Cheshire, England, a British company 7 This invention relates to false twisting machines which are employed for crimping or imparting, a so-called false twist to synthetic and like textile yarns and threads.

An object of the present invention is to provide an arrangement wherein, when the false twisting unit is-moved away from the belt and rotation of the spinner unit ceases, an associated feed device feeding yarn or thread to the-false twisting device is also disengaged so that feeding of the yarn or thread also ceases. A further object of the invention inherent in the construction is to'control theop'eration and the condition of the yarn or thread by varying speeds of the feed and take-up.

According to the present invention a false twisting machine ischaracterised by the provision, below-a take-up tube resting on a roller whereby it is rotated, of a pair of feedrollers which, in use, are lapped by the yarn or thread, said feed rollers being disposed one above and one below the false twisting unit of the machine and each being supported so as to rest on an associated drive roller, whereby varying speeds can be imparted to the feed rollers, there being displacement means acting on said feed rollers and the false twisting unit whereby one operation of the displacement means serves simultaneously to displace the false twisting unit away from its driving belt and to lift the feed rollers off their associated drive rollers, a reverse movement of the displacement means restoring all to their former positions and operations. j

A brake may be provided on the unit, which brake serves to arrest the rotation of the spinner, the displacement means when operated to move the unit away from the belt, serving to apply the brake. V

The invention will be described further by way of example with reference to the accompanying drawings in which: i

I Figs. la and 15 show respectivly the lower and upper parts of a false twisting machine constructed in accordance with the invention, in front elevation; and 7 "Figs." 2a and-2b are corresponding: end views of the machine. 1 g i .A false twisting machine constructed in accordance with the present invention comprises a plurality of banks, each including a false twisting unit shown generally at 10, mounted so that it can be moved into and out of contact with an endless driving belt 11 running round the machine.

supported upon a vertical post 12, and a helical spring (not shown) surrounding the post 12 and secured respectively to the unit and to the post 12 serves to urge the unit 10 towards the belt 11 so that the spinner 13 thereof is rotated by the belt 11.

Parallel to and spaced from the post 12 supporting the unit 10 is a vertical shaft 14 and this constitutes part of means for displacing the false twisting unit 10 away from the belt 11. Midway along each such shaft 14 is a cam 15, this co-operating with one end of an axially The false twisting unit 10 is conveniently swingably 2,946,177 Patented July 26, 1960 displaceable push rod 16, the other end of which engages the unit 10 at a point displaced to one side of the post 12. Thus, when the vertical shaft 14 is rotated about its axis, the cam 15 displaces the push rod 16 and presses this into contact with the unit 10 to displace it away from the belt 11 so that the spinner 13 is moved completely out of engagement with the belt 11.

Pivoted one above and one below the false twisting unit .10 are

U brackets

17, 18, these each supporting a

feed roller

19, 20, respectively which rests upon an associated

drive roller

21, 22, the axes of these rollers being substantially horizontal. The

drive rollers

21 and 22 are driven independently and are capable of varied rotational speeds over wide ranges.

Each bracket '17, 18, has near its pivot, a rotatable disc 23. The vertical shaft 14 already described extends between the limbs of the

U brackets

17, 18, and a

cam

24, 25, is provided at each end thereon, these being disposed so that the rotatable discs 23 on the

brackets

17, 18,. rest thereon. The arrangement is such, therefore, that upon rotation of the vertical shaft 14, as already described, to move the spinner unit 10 away fromthe Also mounted upon themachine shaft is a heating de vice'26through which thread passes in contact with a heater plate, (not visible in the drawings) to the spinner tube- 13 so that the thread is suitably heated when it reaches the spinner tube. When the displacement means" is operated to stop the rotation of the spinner tube 13 and the travel of the thread, the thread is at the same timemoved, by "displacement of the brackets'17, 18 laterally in the heater 26, to take it out of immediate contact with the heater plate. x

In use, a yarn or thread to have a false twist imparted thereto is fed from a bobbin 27 through a suitable tensioning device 28 round the feedroller 20 below the spinner tube 13, through the heating device 26, is threaded through the spinner tube '13 and then taken over the feed roller 19 disposed above the spinner tube. From the roller 19 the yarn or thread is taken over the guide 30 to the take-up tube 31 resting on the driven roller 32, on which take-uprtube 31 the yarn or thread is wound into a package: the driven roller 32 is capable of speed variation which consequently varies the speed of rotation of the take-up tube. This is done Withthe feed rollers lifted from their

drive rollers

21, 22 and the spinner tube 13 out of contact with the belt 11. ;The vertical shaft 14 is then rotated, a'suita ble hand lever 29 being provided for this purpose, so that the adequate tension is imparted to the thread, both as it passes to the spinner tube and from the latter and also speed of take-up.

When the machine is to be stopped, the vertical shaft 14 is rotated so as to lift the feed rollers from their drive rollers, so that the feed of the thread is arrested. At the same time, the spinner tube is moved out of contact with the belt, and the thread now stationary, is moved out of contact with the heater plate thus ensuring that the thread will not become damaged.

The invention is not confined to the precise details of the foregoing example and variations may be made thereto, if desired. For example, there could be an electric switch for the heating device associated with the vertical shaft 14, the switch being operated to switch ofi current from the heating device when the thread feed is arrested. 7 V V p Further, the push rod lldwhich displaces the spinner unit away from the belt could be arranged to act through a brake shoe or the like, which operates to arrest rotation of the spinner tube when the feed of the thread is arrested.

It is to be understood that by varying the speeds of the feed rollers and the top roller independently, a very exact control over the yarn or thread wound on to the take-up tube can be effected, as for'instance, by increasing the speed of the bottom feed roller the yarn or thread can be relaxed, or by increasing the speed of the top feed roller a greater tension can be applied or by increasing or decreasing the speed of the top roller and hence the take-up tube with or without'varying the speed of one or both of the feed rollers, tension or relaxation on the yarn or thread can be eliected after the yarn or thread has been treated in its passage through the apparatus below.

We claim:

1. In a false twisting machine, in combination, a false twist spindle having a vertical axis; support means supporting said spindle for turning movement about a second axis parallel to the spindle axis; a horizontal drive belt, said spindle being spring urged to turn around said second axis into engagement with said drive belt to be driven by the latter; stationary heating means located along the axis of said spindle when the latter is in driving engagement with said belt for heating a -yarnwhich passes through said spindle; and manually operable means cooperating with said spindle for turning the latter at the will of the operator around said second axis away from said belt to stop the operation of the spindle, the movement of the latter away from said belt also moving the yarn to a position where it is is not heated by the heating means so that the heating of the yarn also stops when the operator moves the spindle away from the belt.

2. In a false twisting machine, in combination, a false twist spindle having a vertical axis; support means supporting said spindle for turning movement about a second axis parallel to the spindle axis; a horizontal drive belt, said spindle being spring urged to turn around said second axis into engagement with said drive belt to be driven by the latter; a pair of parallel feed rolls respectively having horizontal axes and respectively located above and below said spindle; a pair of parallel horizontal drive rolls respectively located beneath said feed rolls; a pair of pivot means respectively supporting said feed rolls for free turning movement by gravity respectiveiy around a pair of horizontal axes downwardlyonto said drive rolls to be driven by the latter; and a single manually operable means cooperating with said spindle and said pair of pivot means for turning said spindle around said second axis away from said belt and for simultaneously turning said pair of pivot means up.- wardly away from said drive rolls to raise said feed rolls out of driving engagement with said drive rolls simultaneously with turning of said spindle away from said belt so as to stop the operation of the spindle and simultaneously stopping the feeding of yarn therethrough.

' 3. In 'a false twisting machine as recited in claim 2, stationary bearing means located between said spindle and one of said feed rolls along the axis of said spindle when the latter is in driving engagement with said belt for heating a yarn transported by said teed rolls through said spindle, the yarn being displaced with respect to said heating means when said spindle is turned away from said belt and said feed rolls are raised awayfrom said drive rolls so that heating of the yarn also terminates when the operation of the spindle stops.

,4. In a false twisting machine, in'combination, aborizontal drive belt; a vertical false twistspindle; support means supporting said spindle for turning movement about a vertical axis spaced from and parallel to the axis of the spindle, said spindle being spring urged around said vertical axis into engagement with said belt to be driven thereby; a push rod perpendicular to said vertical axis and supportedby said support means for movement along a path which will move said spindle around said vertical axis away from said belt to stop the operation of said spindle; a vertical rod supported by said support means for manual turning movement around its axis; and a cam carried by said vertical rod at the elevation of said push rod for moving the latter when said vertical rod is manually turned in a direction which will move said spindle around said vertical axis away from belt;

5. In a false twisting machine as recited inclaini 4, a pair of horizontal feed rolls respectively above and be low said spindle for feeding yarn therethrough; a pair of'drive rolls respectively located beneath said'feed rolls for driving the same; a pair of brackets carrying saidfeed rolls respectively, said brackets being turnably supportedby said support means for free turning movement around horizontal axes, respectively, so that said feed rolls are urged by gravity toward said drive rolls to be respectively driven thereby; and a pair of additional cams fixedly carried by said manually turnable vertical rod and cooperating with said brackets for turning the latter and said feed rolls therewith upwardly away from said drive rolls when said vertical rod is manually turned to actuate said'push rod to move the spindle away from the drive belt.

References Cited in the file of this patent UNITED STATES PATENTS 518,714 Belgium Apr. 15,1953