US2652681A

US2652681A - Arrangement in spinning regulators

Info

Publication number: US2652681A
Application number: US78278A
Authority: US
Inventors: Janso Arvid; Sand Albert
Original assignee: ASEA AB
Current assignee: ABB Norden Holding AB
Priority date: 1948-10-27
Filing date: 1949-02-25
Publication date: 1953-09-22
Anticipated expiration: 1970-09-22

Description

sgpt. 22, 1953 Filed Feb. 25, 1949 A. JANS ET AL ARRANGEMENT IN SPINNING REGULAIORS 5 Sheets-Sheet 1 A IN VEN TORS 4m/w IAM/s0 @V ATTORNEY.

Sept 22, 1953 A. JANs ET AL 2,652,681

ARRANGENENT 1N SPINNING REGULAToRs Filed Feb. 25, 1949 3 Sheets-Sheet 5 lulu Patented Sept. 22,Vv 1953 UNITED vs rAfrgEvs @PATENT tiorf;111es ARRANGEMENT IN'DSPINNING JEEQULATQBS Arvid Jans and Albert Sand, Vasteras,`Sweden,

assignors yto AAllmanna f -Svvenska -Elektriska Aktiebolagehvasteras, Sweden,1 a Swedish corporation Application February 25, 1.949,,Serial...1l,0` 75,278

" in Czechoslovakia Qctqber 2,?1948 "2 Claims- The present invention relates-'to electrically driven-ring spinning machines and in particular to spinning regulators for such'machines-of Vthe type in which awing, oscillating in accordance with the up and down movements of the ring rail, is provided with a curved slot inwhicha guiding piece, connected with the speed regulating device of 'themachine driving-motor, iscaused to slide under the influence of a guide screw which is rotated by means of theratchet wheel of the ring `rail. The regulator controls-the spinning of the thread on to a bobbin according to a spinning diagram or curve, the=-funda Amental form of which is determined by the shape of the slot in the wing and the'pathof theguiding piece along the guide screw. The form ofthe top curve deposited on the fundamental curve is determinedby the oscillations of vthe wing,

The path ofthe guiding piece, which for constructional reasons has a constant .length,v also corresponds to the-Ybobbin filling. vFor various reasons the speed must be low atwthebeginning of the spinning, but in order to obtain :the greatest ,possible average speed and, by this,` Ythe greatest possible output, it -is very important -t0 allow the fundamental curve to reach its =maxi mum value as soon as possible. For cops'having lengths upto '7 or 8 this regulation can be obtained by a suitable shapepof the slotinthe wing, but for larger lengths of the cops constructional diiiculties are encountered, as the slotvcannot be-madeias steepas may be required `for spinning long cops.

1 In order to increase the steep-ness of the-fund a mental curve the guide screw yaccording to "fthe present invention is providedwith AthreadsV of two pitches, one-of which -is coarseY and causes a rapid displacement of the guidingpiece atthe begirming of the spinning and the other of which is `rather ne and causes a slow'd-isplacement of the guidingpiece during V`theremaining part of -the spinning. '-Thei'guide' screwcan also befmade. with threads of several dilferentpitches in order to modify other yparts of the'fundamental curve, if required. In order to -make it possible tewerk with several pitches; Athe guidingpiece is provided with asleeve surrounding the-guide screwand havingan inwardly projecting -pin guided Aby the Iscrewl threads. *The thread canbe made with-severa1 startsandg-the guiding piece will then have a number of AAtrunnions corresponding to -the number` ofstar-ts.

vAn arrangement of ytheinvention; will nowV be described withl reference Vtothe accompanying drawings in'which,

-Figure l isa side view, ypartly in'section, -ofa `regulator according to lthe invention,

Figure 2-isa sectionalwiew of the regulator of Figurel, taken mainly on the lme'II--II-and with its left-hand portion taken Von the line Figurey 4 lis a plan view, partly in section, on anenlarged scale of I the two threaded-guide :screw andsleeve,

Figure 5 isVan-end'view, partly-in section, of

Figure 4,

'the speed Aof lthemachinedriving motor during A-a wholespinning periodthe yso-calledffunda- `mental vspeedgvistransmitted to a bevel gear situated on -thebottom sicle'ofV the-bearing-'shield of the lring spinning motor not shown vonithe drawings,- and from there it-is Atransmitted-v-by1 nea ns of afshaft 20 l andbevel gears--2il2f 203,r -2 [14K-Fig, 2) to a guide screviI 9 whichmoves aguiding piece or-dier8 within the slot` lof na slottedplateer Awing' 3 "through the medium otatravelling sleeve SI-hereinafter described. "The-wing 3-is adjustable with respect-toa bell-crank lever lv '(Fi'gtrjl) servingasa regulator-member, by means of a screw 4 (@Flg. r2). v-The bell-crank lever I consists ofwaibifurcatgd end (at kthe lefthand QfjFig. 1) andan a-rmiat the-right hand offFig.` A11) is pivoted about the centre of rotation2`3. 'ij'Ifhe (adjustment'of the wing 3 with respect tothebellcranklever vI-v-is effected bythe screw 4 in awslot 5-and can be indicated by a pointer@ on a rscale B yGFig- 1)- In this Way 'th ,inlirlation ,Qf 'ille fundamental curve inr Fig. 6 may be va ed. Shaft y1204i Fig. 2) pf .the driven gear fillv Y1s directly connected t0 the, guide fritti-rw,.Siv ,and rotatably,rrlwltclY in* a Sirmione, memberw which -is mounted' for angular movement tonga Shaft 20.31. Said ,Shaft 29,3! mustn@ .situait out of Lilus-:centre of .rotaton ofithe .bell-crank lever l.

, IWFig-fY-the ,well-.known meanaior @temorement of 'the ring rail ndfthe spindles are i11- dicated schematically. 11.11.16 numeral 90 thev spindles 30| and the heart cam 302 are driven from the said shaft. The movement of the heart cam 302 is transmitted by the copping lever 303 and the chain 304 to the ring rail 305. The cam 302 causes the ring rail 305 to move up and down, and the chain 304 is wound up stepwise by the action of the ratchet wheel device 306 carried by the copping lever 303, thus producing the stepwise lifting movement of the ring rail according to the desired shape of the bobbin.

The guide screw 9, as will be seen from the more detailed Figures 4 and 5, is provided with three threaded parts 9|, 92,- 93 of which the upper and lower parts 9|, 93 have a rather fine pitch and the middle part 92 has a coarse pitch. The lower part 93 is used only partly when spinning commences. A sleeve 8| surrounding guide screw 9 is tted with a pin 82, adapted to engage the threads of screw 9, enabling the sleeve to be screwed up or down when the guide screw 9 is vturned in one or the other direction. The guiding piece 8 and a link 205 are attached to a pin 83 protruding from the sleeve 0|, as shown in Figures 2 and 3.

The movement of the guiding piece 8 inthe slot 1 is transmitted by means of the link 205, a lever 206, a shaft 201, a lever 208 and a link the length of which may be altered by the action of extension screw means III to a lever i2, which is connected to the regulating member 200 of the motor. The starting speed is set on a speed scale C mounted on the regulator casing 2 by means of the adjustable link II.

The up and down movement of the ring rail 305, which varies the speed during spinning of a new layer (the so-called layer speed) is transmitted to a lever 22, which is connected to a lever I hereinafter referred to as a regulating arm and a driving screw I1 by means of a supporting piece 209 adapted to rotate on axis 24 in bearings 2| and 2 I0.

The returning mechanism comprising bevel gears 2| 2 I2 is arranged on the supporting piece 209. A sprocket 220 secured to gear 2|2 is adapted to be driven by a chain 2|9 from a sprocket 2 I8 secured to bevel gear 203. The gear 2| is rotatably and slidably mounted on a screw |05, which in its turn is freely mounted on a cylindrical extension |10 of the driving screw I1. The screw |05 is provided with a driving pin 2|3 slidable in a slot in the gear 2| When the gear 2| is turned in a certain direction, the screw |05 is screwed into the sleeve |04 and is arrested after a certain time by a threaded stop |01` The stop |01 is provided on the outer end of its periphery with a number of slots 2 I4 by which it can be locked in diierent positions through the action of a ratchet 2|5. This ratchet 2|5 is pivoted to the outer end of the screw I1 and is adapted to engage one of the slots 2 |4 as well as one of the recesses 22| made in the front face of a sleeve 2|6 surrounding the sleeve |04, by means of an elevation 222 made on a spring member 223 attached to the ratchet 2I5.

The sleeve 2|6 is provided externally with grooves 224 in which a ball catch 2I1 is adapted to fit to prevent involuntary turning of the sleeve 2|6 by friction between the screw |05 and the sleeve |04,

When turning in the opposite direction the screw |05 reaches, after a certain time, the end of the sleeve |04 which is formed as a stop |08.

A guiding piece I9, fitting into the bell-crank lever I, runs on the screw I1. Upon release of the ratchet 2|5 the guiding piece I9 may be set according to a scale A by rotation of the screw |1 without moving the screw |05, the stop |01 or the sleeve |04 of the returning mechanism from their positions. If the guiding piece I9 is set in the zero position of scale A, which is the fulcrum 24 of the screw I1, the amplitude of the layer speed is reduced to zero.

In ring spinning machines having conical or cylindrical building up of the cop, as is presumed in the present form of the spinning regulator, the guiding piece |9 is displaced on the screw I1 of the regulating arm I6 from a certain adjustable point of time inwards against the turning centre 24 of the supporting piece 209 in order to compensate the increase in amplitude, which is caused by the displacement of the guiding piece 8 of the guide screw 9. In machines with combined cylindrical and conical building up of the cop an opposite movement will be used in that the guiding piece I9 o f the regulating arm, beginning in the turning centre 24 of the regulating arm, will be displaced from a certain point of time outwards on the arm in order to obtain a successively increasing amplitude of oscillation. The regulating diagram will in this case be entirely dierent from that previously used.

It will be understood that the screw |1 of the regulating arm and the guiding piece I9 can also be carried out for two or more pitches in order to obtain a modified form of the top curve.

The mode of operation of the above described regulator is as follows:

Rotation of the shaft 20| and the

gear wheels

202, 203, 204 causes the guiding piece 8 to travel up on the screw 9, and the gear wheels 2| l, 2|2 to rotate through chain 2|9 and sprockets 2|8, 220. At the beginning of the spinning, the screw |05 contacts the stop |08 at the end of the sleeve |04, see Figure 3, but during the spinning it is screwed along the sleeve towards the stop |01, which is adjustable according to a scale D. If the position of stop |01 is adjusted on scale D to Zero i. e. screwed out as shown in Figure 3, it is only reached by the screw |05 when the spinning period is finished. Thus the movement of the screw has in this case no influence on the amplitude.

If, however, the stop |01 is set at a value higher than zero on scale D i. e. screwed farther into the sleeve |04, it is reached by the screw |05 a certain time before the end of the spinning period and as the stop is connected to the sleeve 2|6 and the screw I1 by means of the ratchet 2 I 5, the movement of the screw |05 is now transmitted to the screw |1, whereby the guiding piece I9 is moved towards the turning centre 24 of the screw I1, which is also the turning axis of the supporting piece 209, and the amplitude of the layer speed is reduced.

The combined movement which is obtained by the oscillations of the bell-crank lever and the displacement of the guiding piece 8 in the slot 1 is transmitted by the

link mechanism

205, 206, 208, and I2 to the regulating means of the machine driving motor, the speed of which thus is varied. The speed variations during the spinning period constitute the so-called spinning diagram which is different for different thread material, kind of yarn, yarn number and external conditions, such as working temperature, air humidity and so on. Different spinning diagrams can be set according to the scales A, B, C and D, preferably according to values determined or calculated beforehand, which values can easily be adjusted during service. VFigure 6 shows av typical spinning diagram which can be obtained by means of the present regulator. Here the curve a represents the so-called fundamental curve obtained by the movement of the guiding piece 8, and b the so-called layer curve obtained by the oscillations of the bell-crank lever I.

In accordance with the present invention the spinning speed at the commencement of the spinning operation is relatively low but increases rapidly to its maximum value, this result being obtained by forming the threads of the guide screw with varying pitches.

We claim as our invention:

1. Arrangement in spinning regulators for electrically driven ring spinning machines, comprising a speed regulating device for a driving motor, a ring rail having an up and down movement, a wing adapted to oscillate in accordance with the up and down movements of the ring rail, a curved slot in said wing, a guiding piece connected with the said speed regulating device, means imparting stepwise movement to the ring rail, and a guide screw rotatable by said means and adapted to move said guiding piece within said slot, said guide screw being provided with screw threads of different pitches, the major pitch serving for actuating the control of the initial speed of the driving motor whereas the minor pitch is 'adapted to control the speed during the remaining spinning period.

2. Arrangement in spinning regulators according to claim 1 wherein the said guiding piece comprises a sleeve enclosing the guide screw, and a pin on the inside of said sleeve.

ARvID JANs. ALBERT SAND.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,200,327 Echberg et al Oct. 3, 1916 2,349,882 Reichelt May 30, 1944 FOREIGN PATENTS Number Country Date 715,178 Germany Dec. 15, 1941