US2168449A

US2168449A - Ring spinning frame

Info

Publication number: US2168449A
Application number: US202151A
Authority: US
Inventors: Reich Erich
Original assignee: GESSNER ERNST AG
Current assignee: ERNST GESSNER AG; GESSNER ERNST AG
Priority date: 1937-04-16
Filing date: 1938-04-15
Publication date: 1939-08-08
Anticipated expiration: 1956-08-08

Description

Aug. 8, 1939. E. REICH RING SPINNING FRAME Filed April l5, 1958 3 Sheets-Sheet 1 llg- 8, 1939- E. REICH RING SPINNING FRAME Filed April l5, 1938 3 Sheets-Sheet 2 lg- 8, l939- E. REICH 2,168,449

RING SPINNING FRAME Filed April l5, 1938 3 Sheets-Sheet 3 Patented Aug. 8, 1939 A UNITED STATES PATENT OFFICE "s168449 v Erich to Ernst Gesmer German corporation Application April 15. In Germany 4Claims.

This invention relates to ring Spinning flmes or machines and more particularly to the drivin! means for the calender rollers, drawing rollers and condenser bobbin rollers and to a method of adjusting the speeds of said rollers.

'It occurs very often, more particularly with carded wool yarn, that small quantities have to be spun with diiIerent twists and drafts, whereby the speed of the slubbing or condensed sliver running oi! from the condenser bobbin has to be adjusted in accordance with the speed of the drawing rollers. In ring spinning frames Ifor woollen spinning the twist and draft and the speed of the slubbing delivery are usually changed by exchanging gearV wheels at three or four places. Oi course, the machine has to be stopped for this purpose, which gives rise to waste of time and many accidents. Also, it is not possible to accurately predetermine or calculate the gears which are required, due to the frequent changes of the working method, the spinning material, its length of staple etc. occuring in woollen spinning. Therefore, it isrequlred to find the adjustment required for the desired product by tests.

Moreover, in known machines of this kind, the draft, the twist and the condenser bobbln device have to be adjusted to suit the change speed gears, while any speed between two successive gear ratios cannot be adjusted at all, which is detrimental especially in the draft and condenser bobbin adjustment. Furthermore, in the known speed changing systems about sixty diii'erent change speed gear wheels are required for each machine lthe storage of which requires much space and attention.

It is the object of the invention to eliminate these defects of known .ring spinning machines. To this end, I provide means for gradually and steplessly changing the driving speed of the calender rollers, drawing rollers and condenser bobbin rollers. Thus, it becomes possible to adjust the speed while the machine is in operation and without endangering the operator and to adjust the mutual ratio of the three speeds in accordance with the special features of the spinning material and of the yarn to be produced. YPreferably the stepless change speed gears are arranged in series by driving the change speed gear for the calender rollers directly from the main shaft 4of the machine; while the change speed gear for the drawing cylinders is driven from the calender rollers and the change speed gear for the condenser bobbln rollers is driven 5I from the drawing rollers.

haft. Alle (Saxony). a

1938, Serial No. 202,151

In this manner the three speeds are interrelated so that when the speeds are to be changed, in the rst instance only the change speed gear for the calender rollers has to be newly adjusted while the two other speeds change automatically 5 in the same ratio. Only when it is found that the speeds of the drawing cylinders or of the condenser bobbin rollers require additional adjustment, the respective change speed gear is readjusted independently from the speed of the calender rollers.

It will be understood that instead of stepless gears separate variable speed vmotors may also be used, the speed, more particularly the starting speed of which is controlled from the main motor. y

In order to facilitate the operation of my vnove speed changing system, I provide means for indicating the speed of the 'diiierent rollers. To this end, the various drives are coupled in suitable manner with indicators showing the number of revolutions of the spindle per minute, the twist per meter, the delivery per minute and the draft in percent. Thus, the operator can ascertain by a glance to the indicators whether the stepless adjustment o! the various working speeds is correct or where readjustment is required. In this manner misadjustments can be recognized and corrected immediately, whereby time and material is saved. 30'

The invention will be better understood by reference to the following detailed description in connection with the accompanying drawings showing by way of example and schematically some embodiments of the invention, via- Fig.- lis a front view'of the driving parts of a ring spinning frame, having the invention applied thereto, the parts not necessary for the understanding of the invention being omitted for the sake of simplicity.

. Fig. 2 is a side elevation oi' the arrangement shown in Fig. 1.

Fig, 3 is a front view o! a modified form of the driving parts.

Fig. 4 is a side elevation of the arrangement shown in Fig. 3.

Fig. A5 is a view, in larger scale, oi' the change speed gear for the condenser bobbin rollers, and

Fig. 6 is a plan view of the gear shown in Fig. 5. w

Similar reference numerals denote similar parts throughout the diiierent gures.

Referring now to the drawingsin greater detail, there is shown a machine frame 1 in which the pairs o! calender rollers l, the pairs oi.' drawu ingrollers l and the condenser bobbin roller Il are mounted. I The calender rollers 3 are driven by a stepless speed change gear Il which is driven by a roller chain I3 from the main shaft I2 of the machine and controlled as to its speed ratio by a hand wheel I4.

A similar stepless change speed gear is provided at l5 for the drawing cylinders 3, driven, by a roher chain I5, from the calender roller 3 and controlled by a hand wheel I1. While a great number of stepless change speed gears are known in the art, comprising, for example, friction wheels and discs the relative positions of which are adjusted so as to change the gear ratio, one form of a stepless change speed gear is shown schematically in Figures 5 and 6 as inserted between the drawing cylinders 3 and the condenser bobbin roller Il. A V-belt pulley I9 is fast on the shaft I3 of the drawing cylinders 3 and connected, by a V-belt 23, with an adjustable V-belt pulley 2i which in turn drives the condenser bobbin roller I and by adjustment of its adjustable portion 2I renders lt possible toV adjust the speed ratio between the rollers 3 and Il.

As will be seen from Figures and 6, the adjustable portion 2l of the pulley 2i is slidably mounted on its shaft and acted upon, at its center point 2|", by an arm 50 of an offset bell crank lever 55, 5I pivoted at 52 and operatively connected by its arm 5| to the inner end of a threaded spindle 22' on which the hand wheel 22 is xedly mounted.

Thus by moving the portion 2l more or less towards the portion 2| of the pulley, the diameter of the running face on which the belt 20 runs and thus thegear ratio can be steplessly and gradually changed. From the pulley 2| the rollers I0 or their gear wheels I Il' respectively are driven in known manner through gear wheels 53 and 54 (shown in dotted lines in Fig. 5) and act upon the bobbins 23.

It will be understood that similar change speed gears as shown in Figs. 5 and 6 or any other suitable type of stepless change speed gear may be arranged in the gear boxes Il and I5 in Figs. 1 to 4.

'I'he operation will now be briefly described.

The slubbing or roving coming from the bobbin 23 passes between the drawing cylinders 9, is twisted by the revolving or twist tube 24 winch in the manner known vper se may be driven at different speeds, and passes between the calender rollers l to the spindle 25, being drawn between.

the rollers 5 and I. The amount of draft depends substantially on the relative speeds bex tween the cylinders 3 and 3.

The spindle 25 is driven in the usual manner iro'm the drum 3l which in turn is driven in known manner with adjustable speed from the main shaft I2.

It will thus be understood that when'adjusting the speed of the calender rollers 3 by means of the hand wheel I4, the speed of the drawing cylinderss and of the drum III is also changed, because the change speed gears are arranged in series. Where only a change of the yarn twist is required, merely the gear ratio at Il has to be readjusted, by means of the hand wheel I4, while; where the draft is also intended to be changed, the gear ratio at I5 has also to be readjusted, by means of the hand wheel I1, whereby the speed of the condenser bobbln is automatically changed at the same time. (The hand wheel I'l has been` shown in Figs. 1 and 3 as l the main driving shaft I2.

arranged above hand wheel I4 for the sake of a better survey, but actually these two hand wheels are arranged side by side, as shown in Fig.' 2.) Only in case the slubbing delivery should be found to be too fast or too slow the speed of the drum III has to be readjusted additionally by means of the hand wheel 22. All of these adjusting operations can be carried out while the machine is running and the adjustment of the change speed gears can be supervised at

indicators

33, 34, 35, 35 which will be hereinafter described.

In the arrangement shown in Figs. 3 and 4, the stepless change speed gear Il for the calender rollers 3 iscoaxially arranged and connected with Y From the shaft 2l of this gear the speed of which is changed by the hand wheel I4, there are driven the calender cylinders 8, by a roller chain drive 23, and the drawing cylinders 3, by a roller chain drive 33 and an inserted change speed gear I5. The remaining parts are as shown and described with reference to Figs. 1 and 2. The adjustment of the change speed gears is indicated by

indicators

26 and 21 which are constructed and operatively connected with the respective shafts in the manner known per se.

In order to facilitate the control of the machine, I may provide additional indicators showing 'not only the adjusted positions of the change speed gears but the actual spinning data determining the spinning operation. For this purpose four

indicators

33, 34, 35, 36 are shown in Fig. 2 arranged on the switchboard 32 above the hand wheels I4 and I1, indicating said spinning data, vizindicator 33, the revolution number of the spindle per minute, indicator 34, the twist per spindle speed spinning speed that is to say the twist. 'I'he indicator 36 in turn is inserted between the drive of the drawing cylinders 3 and the drive of the calender cylinders 3 and indicates the ratio drawing speed delivery speed that is to say the draft in percent. Divisional indicators indicating the ratio of two speeds are known per se and need not be described here in detail.

In this manner the spinner, immediately he operates the hand wheels I4 and il, is enabled to supervise the reaction of the spinning operation and data to the adjustment and thus he can correct the adjustment before damages occur.

It will be understood that it is within the purview of the invention to drive the indicators mechanically, electrically, hydraulically or in any other suitable manner and the instruments may be constructed ,in any suitable manner as known per se. I

While I have herein shown and described certain preferred embodiments of my invention, I wish it to be understood that I do not `confine myself to all the precise details herein set forth by way of illustration, as modification and variation may be made without Adeparting from the spirit of the invention or exceeding the scope of the appended claims. More particularly, in view of the great number of different typesof stepless speed changing means and ring spinning machines, considerable constructional changes may be effected without departing from the scope of the invention. For example, separate variable speed motors may be used for driving the three said types oi rollers (calender rollers, drawing rollers and condenser bobbin rollers) individually. In this case, the caslngs Il and I5 would represent the respective variable speed motors and thcl cone belt pulley 2| would be replaced by another variable speed motor. The speeds, especially the starting speeds of these motors will have to be controlled from theA main motor.

I claim:

1. A ring-spinning machine of the character described, having a spindle and its drive, calender rollers, drawing rollers and condenser bobbln rollers, a variable speed transmission for driving said calender rollers, a similar transmission each for said drawing and said condenser bobbin rollers, and means for driving said variable speed transmissions in series to interrelate the speeds of said devices, to permit speed regulation of the several sets of rollers during the operation oi' the machine, and to adjust a desired speed ratio between the roller sets and the spindle when one or several of said transmissions are varied.

2. A ring-spinning machine of the character described, having a spindle and its drive, calender rollers, drawing rollers and condenser bobbin rollers, a variable speed motor for each of said roller sets, a main motor arranged to control the speed of said variable speed motors, to permit speed regulation of the several sets of rollers during the operation ol' the machine, and to adjust a desired speed ratio between the speeds o! the several roller sets and the spindle when the speeds of one or several of said motors are varied.

3. A ring-spinning machine of the character described, having a spindle and its drive, calender rollers, drawing rollers and condenser bobbin rollers, a variable speed transmission for driving said calender rollers, a similar transmission each for said drawing and said condenser bobbin rollers, means for driving said variable speed transmissions in series to interrelate the speeds of said devices, to permit speed regulation of the several sets of rollers during the operation of the machine. and to adjust a desired speed ratio between the roller sets and the spindle when one or several of said transmissions are varied, and means for individually indicating the spindle speed, the twist,I the delivery and the draft of the thread.

4. A ring-spinning machine oi the character described, having a spindle and its drive, calender rollers, drawing rollers and condenser bobbin rollers, a variable speed transmission for driving said calender rollers, a similar transmission each for said drawing and said condenser bobbin rollers, means for driving said variable speed transmissions in series to interrelate the speeds of said devices, to permit speed regulation of the several sets of rollers during the operation of the machine, and to adjust a desired speed ratio between the roller sets and the spindle when one or several of said transmissions are varied, and an indicator connected with the spindle drive for indicating the spindle revolutions per minute, a second indicator connected with the calender rollers for indicating the unit length delivery per minute, a third indicator differentially connected between the nrst and second indicators to indicate the twist of the thread, and a fourth indicator differentially connected between the drawing roller and the calender roller drive for indieating the draft in per cent.

ERICH REICH.