US2611230A - Spinning frame - Google Patents

Description

p 1952 E. F. SAUNDERS ET AL 2,611,230

SPINNING FRAME 8 Sheets-Sheet 1 Filed Feb. 3, 1950 Q five/2227's ZrZeZ Z Saunders jonaldfl gsdale 3 Sept. 23, 1952 E. F. SAUNDERS ET AL 2,611,230

' SPINNING FRAME Filed Feb. 3, 1950 8 Sheets-Sheet 2' fiaenfong" E'ZeZ Y Jdllizders flonalziq ysdale Spt'XZ S, 1952 E. F. SAUNDERS E1: AL

SPINNING FRAME Filed Feb. 3, 1950 8 Sheets-Sheet 3 all:

7? azznders Fifi/561012 Qw I Sept; 23, 1952 E. F. SAUNDERS ET AL 3 2 SPINNING FRAME 8 Sheets-Sheet 4 Filed Feb. 3, 1950 will 1 55557,

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Sept. 23, 1952 E. F. SAUNDERS ET AL SPINNING FRAME 8 Sheecs-Sheet 5 Filed Feb. 3, 1950 lident'ors 5720227 5 alafli' scZaZe S p 1952 E. F. SAUNDERS ET AL 2,611,230

SPINNING FRAME Filed Feb. 5, 1950 8 Sheets-Sheet 6 2 7 282; azzzaiers Jonafl N I! P 1952 E. F. SAUNDERS ET AL I 2,611,230

SPINNING FRAME Filed Feb. 5, 1950 8 Sheets-Sheet 7 2 1 235 M 14w LEI-SJE-EI 269, 9,51 i 261 E1 F j Jmwr n 27%; J1 Gazznaers jorzaldzfyadale p 1952 E. F. SAUNDERS ET AL 2,611,230

SPINNING FRAME Filed Feb. 3, 1950 8 Sheets-Sheet 8 .Z 7 ZQZ 7 Saunders flaizaZdwsziale I .1 aa' Patented Sept. 2 3, .1952

'SBINNING FRAME *Erle 'F." Saunders; Montreal wesh Quebec, FGanada; and Dona-ld Drysdah; Philadelphiaplia.

el mination-February 3, 19.50fStialZNo; 1, 12,222

"does not, stop the spinning on spindles, onwhich the; strands, beingv spuny. are; sti1l intact.

.RSucn devices. have proven;,eitherA-too; complieated sorcumbersome inqtheir; operation or not too:reliabhe xor.- not ,sumeiently :economieahto meet withipublicyaceeptaneer In someeasespthey have made regular. senvicing of .the frame duringsgjinning too difficult for practical-pnrposes.

i The" present invention. aims o: overcoll these disadvantages ,eof ithe; iprior art; and -to;provide positive; advantages. eIn thisyw ay. stheginvention makes, possible when actnabsaving of waste; and

ofdabounwhieh oreticallyeeould be obtained from: detectin andi inten upt neme hanisms o t e e ner e vpe dQSCmEdeabQi/T I I The: z'invention .is,-;preferably embodied in a spinning,- Hame -having: the ;following.-eon ibination of ,ieatures. siliie irameii-ncludesi a plurality oisp indl sion each ofiwhich; aistrand'oi fibers -,is;spun. i'l here is a set 0fX drawing rolls oneaeh side ot-the frame-throug'mwhichithe strands are Ifedtoithespindles; a creel, and a plurality Qf IOV- ing bobbins in, the creel from which i the .roving is fed to the drawingerolls. Colleetipg means.is provided. ioiaiscavenger .Waste. There {is means for driving. theedrawi-ng roll and common. driv- Hing meansflfor a pluralitviof spindles, Fiour'spin- 'dles, ,twoonse'aehiside ofthe frameiare genera1 1yj driven. by, ajtaperibelt from. a drum driving several belts. 'T"'Ihe, plurality ofldrllms. necessary for. driving fall .the spindles of the'. flame. are driven from, common. drivin 'imeans.

iilherei .is separate ,f detecting A, means,v for, each spindle responsive to: the end Whichit jlsis'pinning. Separate interrupting means for .each spindle gis responsive "to, its respeotive detecting meansis'o as .'.to stop i the roving beingi'fed ,to that particular spindle lat, aposition, prior ,tojthesentry of the roving. intosthe drawing: rolls. This, serves "to prevent feeding the rovingxfrom'theiereel-to, that vparticular spindle. thereby to .redueethe makin of scavenger waste by'that'spindle without interzeenims. (elem-set) fering with spinning of unbroken ends on -other spindles.

''--Preferably; the detecting-means --is -adapted to detect broken ends at a--- position between--the drawing-rolls and 3the--spindle -Preferably,- there is' a trumpet justprior;-to-the-point= of entry of the roving into the'd-ra-Wing rolls and-each interrupting--means-ineludes-an element---adapted--=to engage -the -roving at- -a-- pointadjacent-Wo the trumpet.

Aocord-ingto a preferred-form ofithe invention eaeh'eeteetingineansinc-ludesa sensing element capable-of being "reaotedupon by the-strand of fibers dieing spunand control means to= actuate the interrupting means only actuable bvfthe sensing element when there is no -reactio1r r0m the fibers. -In one-= preierred= eonstructiomaeaeh deteetingmeans includes asensingelementwhieh makes intermittent; movements into-the; path of the strand' offibers being-spun. Ifthe strand is intaet -the sensing felement eontinues -=to make its intermittent" detee'tinig movements? but-, if th'e strantds broken, that element permitsactuation of its :interrnpting me'ehanism; independently of the other detecting-means. '-Pre1-erably-,=several if not all the elements are eausedto-move -f-r-oma oommon i source of-- motion;- but the individual motion "of eachelement can; be stopped-without stopping that ef the elements-of theother defljhere iris control means. having a cvontr ol member. proieetine. with -mid.p ede rminednet This control ,member may ,be connected;1:0,. sjwitch onto. a fluid valve depending uponwhether orinot electricity. .orgfiuidi pressure isused" the meansjiort comtyine ,i'ithe. deteetinggsimp ls'e lto theinte r ptinsi ecbanism- Il e. ree prqcat ns movementsof the support, ,arehaclaptedgtoipa ise movement Joflthei ensineeelem tfin man m lnath-of fthe s r nd pfifl swbe ns snu I t s con tr ction, theige tendin m nt o is: flected when .l'the isttand is, E intact so thatl tlie balancing portion clears the said memberiWhen the strand is not intact the said member is contacted by the balancing portion. The connection between the control member and the interrupting means for that spindle actuates the interrupting means. Preferably, there is a signal which is connected to the said member also actuable by this detecting means so that in addition to the interrupting of the roving, the broken end is signalled to the spinner. The signal may be visual, as for example an electric light, or audible, as for example a buzzer.

The combination may also include means for lessening doublings resulting from primary end breaks. This device is a means for controlling flying broken spinning ends and conveying them to the underclearer roll. This means may take the form of an apparatus for playing streams of air on the spinning ends in the direction of the underclearer roll so that when ends break any loose strands will be blown on to the surface of the underclearer roll.

Various other modifications and additions to the specific preferred structures will be evident from the detailed description to follow.

By interrupting the roving before it enters the drawing rolls, accumulation of waste on the underclearer rolls is practically eliminated. Further, the automatic interruption of the roving obviates a present primary job requirement of the spinner constantly patrolling his frames to prevent undue accumulation of waste from end breaks on underclearer rolls, which, in due course, would result in the displacement of broken ends from underclearer rolls, and, in degree, secondary end breaks.

Thus, by use of the expedients described, it is possible to eliminate the necessity of the spinner regularly patrolling his frames in order to take care of trouble which may or may not have developed. With this necessity eliminated, the invention contemplates the re-arrangement of the spinning labour load so that the'time of the spinner may be fully utilized in productive work. This result will be developed by a further division of the labour load and a further specialization in the use of labour.

The present concept is of a group job in tending spinning frames rather than an individual job. According to the present invention, it will basically be arranged for one attendant to take care of end breaks with the number of spindles tended large enough so that he will be able normally to proceed from end break to end break with a minimum loss of travelling time. Creeling would also be the primary responsibility of a separate attendant and the cleaning functions usually performed by the spinner would be taken care of by learners or helpers. One attendant, probably the one responsible for creeling, would be in charge of the group and give general direction to its work.

This arrangement of group labour would also allow for greater efficiency in labour utilization as it would have sufficient flexibility to offset in a large degree the variations that occur in actual spinning loads that have to be carried by spinning labour. Because of the inherent nature of the material being processed and because of the variations that occur from period to period both in the previous processes and in the processing conditions, the incidence of end breaks at the spinning frames varies from hour to hour and from day to day. Further, as suggested above, on the basis of the manner in which creeling is started, the labour load to meet creeling requirements will vary from time to time. The immediate labour requirements for creeling would 01 course be readily visible while the labour requirements as regards end breaks at any one time would be evident from the system of signal lights explained in a later section. The group job proposed would make it possible to take care of these variations more advantageously than is possible when a single spinner is employed, and an increase in machine emciency would thus be obtained.

This advantage can be developed because the cleaning functions, to be taken care or by learners, can be delayed for intermediate periods and the available time of the learners applied to creeling or piecing of end breaks, when, because of an increased incidence, these functions require more attention 10]. short periods than can be given them by the regular attendants assigned to those jobs. Conversely when the creeling or end break labour loads are less than normal, the respective attendants can aid in the cleaning and bring it up to schedule. Thus a more balanced and economical labour situation can be developed unoer the group system.

This more balanced labour situation will also make a more satisfactory approach to job time stuoies of spinning possiole and allow for better labour incentive pay plans which in the end result in greater economy of operation.

'ihe desirability of attaimng the objectives of this invention has been evident in operational spinmng work for many years as the art or spinmug is among the oldest of the modern arts of machine production. Costs in textile industries have also been developed in great detail so that the resulting economics could readily be estimated. 'ihe other factor required to allow the working out of the objectives was the satisfactory solution of the operational and control problems involved and some of these problems will now be discussed.

A review of the construction and operation of a spinning frame immediately indicates certain of the inherent problems that have to be solved to obtain the objectives outlined. First and foremost of the problems is that of the delicacy of the control that must be used and which at the same time must be reliable in action. The strand of cotton being spun, and with which we have to work, has little strength until the twist is put in it, and this does not occur until it is passing from the lower drawing rolls. Further the action of the control must not interfere with the technical spinning of the yarn. As opposed to this requirement, the control must be sufficiently rugged and so constructed that it will stand continual handling by attendants during the normal operation of the frames and not be put out of commission. It must also be so arranged as not to interfere in any degree with the normal operation of the frame even in the limited space available where operational procedures regularly occur. A further problem in the development of a practical method is the number of controls that are required, as a combination of detector and interrupter must be applied to each production unit of the frame, the spinning spindle, and the number of spindles per plant is ordinarily counted in the thousands. Thus obviously the means must be of a simplified design inorder that its application can be made on an economic basis. In this connection, the substantial increase in the costs of labour and raw cotton in recent years are important teeters 'as th' "actual savings in labour and iiiaserials to' b'e made have b'ec'om'e much mcre important when translated into dollar values.

The practical problems are therefore onesof delicacy and reliability yet ruggedness, compactn'ess, simplicity and low cost'of-manufactiire and instaiiaue 'In' -the"mea'nspie'sehtdin this application, it is"'believed that-all these problems have b'een' solved' sof-that'the general objectives of invention can be "achieved on an economic basis.

Iv'may' also be of help 'inapprecia'ting the inventid to consider the general nature of "automatic =-controls throughout the textiles industry and" also thedistin'ctions that-"exist between its different divisions. Actually, "throughout the industry, automatic end break detectors, usually associatedwith= machine" stop motions "which stop the entire machine, havebeen applied to many processes. Theapplications 'are, of course, H

particularly adapted to the specialized conditionsfthat-they have to meet. To indicate the general nature of fSllCh applications a brief review will now be given of typical'controls in the different'divisi'ons of the manufacturingprocess.

i In'Tgeneral; cotton mill processes may be divided' into four categories which the industry considers'as' separate and distinct from one another; even though the cotton itself is processed progressively-"through each department.

:i'lfhefourgroups of processes. are as follows: "(1)" Preparation *of the cotton fiber for spin- (2) :Spinningth'e cotton fiber into yarn.

(-3) Preparation of the single yarn for use'ln the'fi'nal'endpro'duct. (Some: single yarn is used in weaving cloth just-as 'itcomes from the spinningframe.) V

(4) Weaving of cotton cloth. 7 Before expanding briefly-on the general processing functions of the divisions'of the manufacturing'procedureit may beqpointed out, as would be expected, that becauseofthe nature of the material being. processed and formed, that textile equipment used in successive; divisions of the manufacturin processes is; often associated in es enW h t atz s pr vi y. Actually, inthemain, the: equipment is designed to process strands of fibers in both loose and;fil a association and the "basic procedures foncontrolling such strands, in. general, remains ;the ;sar ne. Basic distinctions made ,in the industry are based on the functions performed in the different divisions of the indu'stry and not on the character of the equipment ,used. -;"I}he first of the general divisions of the'cotton industry listed above, that ofprepari'ng the cotton-forspinni-ng, takes the raw cotton fibers "as they come to the; mill andpro-gressively cleans, arranges the fibers anddraws them out in the form of roving ,thatis suitable for use on the spinning frame; A typicalautomatic control in this group of processes would be that applied to the =drawing frames where; if one end of card sliver breaks, the drawing frame ,is stopped so it may be pieced up. Qtherwise, the drawing sliver we ieetbw t e cer weis The second or spinning division of the industry isalways considered separately it isoat this that the cotton fibers areformed into the yarns that arerequired. fllhe techniques ap- Qpl'ied'in thislprocess allow -for the formation of 'th many :diiferent yarns required to make; the 1' 0 182 or. w i h the ere q be s e processes renewing spinningmust take the single i 6 yarn that has teen 'produced a d 'wcik wfi it p'roduce the finished end product. --It this distinct and separate division or: the-' eottcn mill processes that "this present invention is applied. The third group "df 'procedures listd "bove covering the further-preparation of th ir-igie yarn-for final u'se in'oludes such p'rde' se as spooling, warping, twisting, winding and-sl'ashing. same of these*procedures are --e1o'se1 associated sue they i all: have to do with the 'functions 561: pic ce s'sihgthe finished yani m get it in the" rot-m or put-up desired for the final product A typical automatic co'i'itrol in" this group would-:be that applied -to' the bamwar per' where "if bfie thread; someti'rneseut of several hundrel; breaks, thetvarper stops 'to'al-low it tobe repaired. YIn weaving automatic a controls are appli'e the warp threads so that theldifiwilthtbpdi one breaks. *A'lso; according-to the' type 'of "loom and the'=use -'to"which 'it isbeing put, control which govern its operation are applied to ive'it yarns invariou's 'd'egre'es. i r

The "inventionewill now be described in more. detail-" hy reference tothe accoinpanying w-. ings illustrating "the preferred embodiment of lt. and iii-which: 1

Figure 1- is a tperspectivevlew of "the essential features of a typical conventional ring sp'inii ing frame equipped' according "to lithe invention.

I Figure-iais" a schematib diag-ram in. end elevation showing the gearing for the drive mechanism of the-spinning 'frame sh'own in Figure-'1.

Figure 1b is a top plan-view of thegearing looking from the section-line *lb l b Of FiglII'GlZZ. -Figure 1c is anenlarged vertical cross section through the spinning frame" of iFigurel showing theiprincipal working :parts.

F'ig u-re 2 is axperspe'ctive view of the detecting part of the mechanism of Figure 1.

Figure 3 isa perspective view: of the interruptpartj of the mechanism of "Figure 1.

Figure 4 is a fragmentary'vertical' cross-sectionthrough; adevice similar to that of Figure 3 but in this case air-operated.

Eig-ure5 is a vertical-cr0ss=sectiori through 'the mechanism' ofl ligure 2'zin irest frposition.

' -;-Figu're'.-6 is a'view of "the mechanism (if-Figure 21in; the J =ftesti-ng. position it assumes when the strand of fibersbeing spun is intact. I

Figure "l is a cross-section along the' li'ne "of Figures.

- 1 s'isa fragmentary cro'ss sectionfthroiigh the mechanism of Figure 3 showing particular Figure 13 is a view of the mechanism of Figure 2, in "rest position with details of the control mechanism and the interrupter in rest position. It also shows the locking device detailed in Figure 11 held in free position.

Figure 14 is a view similar to Figure 12 after the control mechanism has been actauted and the interrupter and the locking device have been allowed to function. Figure 15 is a fragmentary side-elevation showing the relative positions of the drafting rolls, the trumpet and interrupter mechanism, with the cutter head shown in two positions.

Figure 16 is a side elevation partly in sectio of another form of detector mechanism.

Figure 17 is a front elevation of the cam controlling the operation of the detector mechanism shown in Figure 16 with the detector lever in the starting position.

Figure 18 is a front elevation of the same cam as in Figure l'lshowing the motions which are developed by it.

Figure 19 is a front elevation view of an alternative form of cam used with the detector mechanism of Figure 16 for testing yarn spun from a double roving and indicating such testing motion.

Figure 20 is a front elevation of the cam of Figure 19 showing the interrupting motion developed by it.

Figure 21 is a schematic illustration inside elevation of an alternative form of interrupting mechanism.

Figure 22 is a rear elevation schematic View of the mechanism shown in Figure 21.

Figure 23 is an enlarged elevation of the cutting edge of the interrupting wire used in the mechanism of Figures 21 and 22.

Figure 24 is a diagrammatic view in elevation of another alternative form of interrupting mechanism, in rest position.

Figure 25 is a view of the interrupting mechanism of Figure 24, after it has been actuated to interrupt the roving.

Figure 26 is a fragmentary side elevation illustrating an alternative form of detecting mechanism.

- Figure 27 is a plan view of the mechanism shown in Figure 26.

Figure 28 is a rear elevation of contact portion of the mechanism shown in Figures 26 and 2'7.

Figure 29 is a diagrammatic plan view showing an alternative form of detector mechanism similar in general aspects to the mechanism of Figure 2 but equipped for more delicate detecting action.

Figure 30 is a diagrammatic side elevation of the mechanism shown in Figure 29 inthe at rest position.

Figure 31 is a diagrammatic side elevation of the mechanism shown in Figure 29 in extended testing" position when the strand of fibers is intact.

Figure 32 is a diagrammatic side elevation of the mechanism shown in Figure 29 in the position it would assume when the strand of fibers being spun has been broken and the control mechanism has been tripped.

Figure 33 is a diagrammatic side elevation of an alternative form of interrupting mechanism equipped with a mechanical feeding device for introducing a, roving into the drawing rolls.

Figure 34 is a fragmentary cross-sectional view of the interrupting elements of the mechanism of Figure 33.

Figure 35 is a diagrammatic side elevation of an alternative form of interrupting mechanism 8 similar to that of Figure 33 equipped with a mechanical feeding device of a different design.

Detailed description Referring more particularly to the drawings, the general arrangement of the spinning frame and mechanism, according to the invention, is as follows, sufficient of the conventional spinning frame parts being described to make clear the combination. On the roll stand A are mounted the drafting rolls B extending the length of the frame which draw roving from the bobbins C mounted in the spinning frame creel. Each roving R is drawn through a trumpet 40 and through the. successive pairs of drawing rolls B, then through the thread, guide 4| to the traveller 42 riding on the ring 43, and thence to the spindle bobbin D. An underclearer roll 45 on the roll stand A collects cotton fly and broken ends from the lower front drawing roll.

The roving R as it passes through the drawing rolls B is attenuated because each successive pair of drawing rolls B is geared to rotate faster than the previous pair. The twist is put into the strand of fibers by the relative rotating motions of the spindle and traveller as the yarn is drawn down from the drawing rolls through the thread guide 4| and traveller and wound on the bobbin. The spindle 48 and bobbin D are rotated by the tape 41 from a drive (not shown), while the traveller 42 is rotated on the ring 43 by the pull of the yarn. There are a number of spindles arranged side by side on the spinning frameeach associated with the mechanism described for spinning a strand of fibers into yarn. The drawing rolls on both sides of the frame are driven through from a common source of power through gear trains at the end of the frame. The spindles are usually driven in fours, two on each side of the frame, by a tape-belt, the tapes being driven off a series of metal pulleys or drums mounted on a shaft running lengthwise through the base of the frame.

The drive for the above mechanism is conventional and well known in the art. It is made up as follows. The main drive is taken from a belt H) which is driven from a source of power (not shown). The belt l0 drives a pulley II which in turn drives a drum l2 which runs from one end of the spinning frame to the other. The pulley l I also drives a shaft l3 inside the drum and concentric to it. The shaft [3 and the drum l2 at the other side of the frame are connected with gearing as follows.

A gear I4 is mounted on the end of the shaft l3. The gear [4 meshes with a gear [5 on a stub shaft [6 which also carries a gear I1. The gear I! meshes with a gear 18 mounted on a stub shaft 18b. The gear l8 drives a, further gear IS. The gear I9 is carried on a shaft 20 which drives the front roll B. On the shaft 20 is mounted a gear 2! which meshes with a gear 22. The gear 22 carries a smaller gear 23 which meshes with a gear 24. The gear 24 drives the shaft 25 of the back roll B3. On the shaft 25 is a gear 26 which drives an intermediate gear 21 which in turn drives a gear 28 mounted on the shaft 29 of the middle roll B2.

Similar gears appear on the other side of the frame to drive similar parts of the apparatus. The gear I8, for example, meshes with the gear 18a. driving the latter. The gear I8a' meshes with a. gear I9a of a shaft 20a which drives the front roll. Likewise there are parts 2 la, 22a, 23a, 24a, 25a, 26a, 21a, 28a and 29a which correspond h. ina s. new illustr ed on the other sideof the. frame.

rum 12 ls riv s. a n mb r'c i e 1. Ea ap 4 dri es f urp nd s T eta e s. tensioned by a tensioning device 39. At each side of the frame there is aring;rai1 3l The rail 3| israised and lowered in synchrony with the other parts by well known mechanism which it is not thought necessary to show. The mechanism so far described in detail is conventional as willbe recognized by those skilled in theart.

Applicant: apparatus and 'general' arrangement broken. The actuating. mechanism is; to; supf my he mo i e f rceor p ratin t e. es

anismE. Theinterrupting means Gresponds to he de e t n e r br ken-emi scribed. and nterr s h ro n beinafed befo e. it-enier he-.firs .na r.- i. dra ng; mush...

' Detector mechanism R ferrin mere r icula y: F gu e 2. s; a: particular refer d. rm. i; de ect n mecha: nism l e d s r d in e ai i heus rt etzintend d p imit hej nv nt e n tsi eadr spe t n pa i l etect ne: me ani m T echan sm; nclud s; a a which is: mounted; on the lappets; by clamps or b lt 0r 7 on: ot er; ui ab e ountin sas: sentially; the same. position; it necessary; The ox 51 exi adsunw rdly rem; l .e; e-5 and sen ra ly ec eu ee n sh pe ncludina al s for accommodation of parts to be descri-bed.; In

the front wall of the box 5| are a pair of spaceclapart. openings 55 which for-m bearings-r for lug's 51 projecting from-theend of the-elevating plate h ch, s usp vQ a y, mo nted W thin v h her. nd. i. h l v in pla s e'nn dt o coi pri the her. nd. a which. s nnec o. n exte sion. t; he a erin o y etween ebot om. i he box and the elevating plate 53 is er bellows or la ich. ro the il sati n a r pressu e h v u c impf. i n t e levating' plate against the weight of the mechi min G iOlLQf. he. hrine... h pla e n .beina aised iv0t ..e eund 1i pen: ces. 55 te ns fthe e alim uniins of th lugs 75-1. 1

O each, sideeig e. late. 8; a pe e tal 65 which are; fiat" members rising above the; edge of' the box 5-i when the detector mechanism, is in the-rest position. lihgtending through openings in the topof thepedestals 65is a wirememher-66f of substantially the shape indicated' in Figure; 2* and has a portion 58 adapted to c cntact the strands oi: fibers being spun at appsition between the drawing rolls and the; thread-guide. The wire member 66' is so -balanced that its rear portiomoutweighs the front portion. So, as the motion of the detector develops, the rear portion will ride along the, top of the box 5! unless the wireES is otherwise actuated.

An elevating plate stop bracket 15 extends upwards and inwards from therear of the, back wall of the box 5! and is adapted to contact the end of the-elevating plate58 in theextreme testing, position, as indicated, for example, in Figure 6.

On one side of the box is mounted thecontrol mechanism, which will now be described (see Figure 2). This. mechanism includes a control lever member 18 pivoted to the side of the box as at 79 and having an upwardly extending arm witha detent end 80 designed to allow thev rear edgepf the" wire 66 to catch it as the wire is moved forward when the strand 0i fibers. is broken, by-the raising of the plate, 58,. The lever [8 also has; a rearwardly extendin arm 3.2V and a forwardly extending arm 83.

Whenthe arm 18 is moved forward by tfe wire 66 the-cam on the end of the, arm 83 pushes closed a spring-contact ,8! which closes the circuit of a solenoid attached to the interrupting mechanism and which in turn causes the interrupting mechanism to act. The cam in its forward movement first closesthe contact 81, then rnoves past it to allow this contact to open; thus, de-energizingthe solenoid and the, interrupter- The cam 85 is so hinged that on resetting the control mechanism to, the rest" po,- sition it will pass the spring contact 87 without closing it. v

As the lever 78 is moved forward, the arm $2 i moved upwards. Thisaction allows the latch lever 99, which is hinged to the sideof. the'box and urged inward by a spring as at 9|; (Figure 12), to swing its lower end 93 inward through an opening 94in the side of the box and to engage .the upper edge of the plate 58 when itre-r turns to its-r est position. The end of the latch lever-9B thus holds the plate 58 in the rest position, until the lever 18 is reset manually against the spring, which action returns the latch lever to the free position, shown in Figure 11. h

The lever 18 at its extreme forward position also closes a spring contact 95 which lights-asignal light 96. The-lever. 73 is held on its'pivot a ainst the side of the box;by a spring washer, or is set in a tight bearing 50 that it will remain in any position in which; itis set or moved to, until a further actuating force is applied toit.

It is thus seenthat when an end breaks the interrupting mechanism is actuated and; the signal light 95 is also lighted.

Thereis also a further position'of the lever '78 which is designed to allow the spindle to remain dead if for instance it is mechanically out of order. This is the position where the lever is pushedrearwardly just enough to open the light contact but not sufiicient to remove thelatch lever so from its latching position on, the plate 8, asshownin Figure 1.

Actuating mechanism 11 by the spring I06. The air under pressure is admitted by the valve WI and passes through an orifice I01 into a chamber or receiver IIO. From the receiver a supply pipe extends the length of the frame and from it fiexible tubing 62a is used to convey the air pressure to the bladders or bellows 62 which actuate the detector mechanisms which are applied to each spinning strand of yarn. There is a larger orifice III in the receiver IIO which serves as a bleeder valve. The flow of air coming into the receiver H through the orifice I0! is, however, sufiicient so that pressure will build up in the receiver IIO despite the air bled through the orifice III until the pressure is sufficient to open the safety valve II2. When the valve IOI is closed, the air pressure in the system is vented through the orifice III. This allows the bellows or bladders to defiate and the detector mechanisms E to return to the rest position. One receiver H0 is common to a plurality of the expansible members operating the detecting mechanisms for the respective spindles, preferably common'to all the expansible members on both sides of the frame.

I nterrupter mechanism The interrupter mechanism G (see Figure 3) includes a base plate I20 having side flanges I22. These flanges are provided with slots I23 adapted to act as guideways for purposes to be described. With arms I 25 projecting one into each slot of the flanges I22 is the cutter or interrupter bar I30. This bar is formed with, or has mounted on it, a serrated edge I3I and a rearwardly projecting shelf or apron I33. A riser I42 is mounted in a bearing made by the bracket :43 which forms an extension of the base plate 26. The riser is connected to and urged by a spring I04 towards the upper position. The riser is attached to the interrupter bar I33. The riser is normally held in the downward position by a projecting detent I41 which engages the arm I49 of the solenoid I50. The solenoid I50 is connected by electrical wiring N32 to the contact 81. This contact is closed by the detecting mechanism E when an end is broken. This action energizes the solenoid and releases the riser M2 for upward movement thus causing the cutter bar I3I to cross the path of the roving and interrupt it.

Use of apron The function of the apron I33 at the back of the serrated edge I3I is to hold the broken ends of the roving in a position essentially at the trumpet so that it is readily accessible to the spinner as he comes to fix the end break. The apron has a surface to which the fibers of the roving will adhere thus retaining them in that position.

An alternative to actuating the interrupter by electrical means, is to start it through pneumatic means with a suitable automatic valve arrangement and an air connection from the detecting mechanism and a release to allow the riser I42 to operate. In one such arrangement the arm 18 actuates an automatic spring air valve which allows air under pressure to reach the interrupter through flexible tubing. An expansible chamber, or bladder, on the interrupter replaces the solenoid I50 and operates to release the catch I49 in the event of an end break. Such a device is shown in Figure 4a. The catch I49 is connected through a rod I60 with a piston head I6I operating in a cylinder I62. The cylinder is sealed at the opposite end by screw plug I63. The piston 12 head I6I is normally urged into closed position by a spring I64. An air inlet I to the cylinder is connected with a supply line I66 which leads to a supply of air controlled by the detecting mechanism. When an end breaks air is supplied through the line I66 and the inlet I65 causing the piston I6I to move to the right. This allows the catch I49 to clear and release the detent I41. This is a known arrangement and does not per se constitute a part of the invention. If pneumatic actuating means is used for the interrupter, a mechanical signal such asv a small flag can be substituted for the signal light.

Detecting mechanism operation The operation of the detecting mechanism is as follows. Let us suppose that all yarns are pieced up and the spinning frame is running normally. The timing motion actuating the cam I05 and through it the automatic valve IOI allows the air to be introduced into the actuating system F which in turn supplies air pressure to the detecting mechanism E. This causes the bellows 62 to be inflated and the elevating plate 58 to rise. As the elevating plate 58 rises in its rotary motion around the pivots 51 the portion 68 of the detector Wire is brought in contact with the strand of fibers R. If the strand is intact the end of the detector wire is carried downward toward the thread guide as shown in Figure 6. This action raises the rear of the detector wire so that it passes over the top of the lever 18 without contact. When the air supply is shut off the pressure in the actuating system F is released through the orifice III thus allowing the detecting mechanism to return to the rest position. These motions are repeated oneach air pulsation set up by the timing mechanism, as long as the strand of fibers remains intact.

If the strand of fibers has been broken, however, then there is nothing to deflect the portion 63 of the detector wire 66 and its rear portion slides forward along the top of the box, as the motions are developed, and hooks the detent end of the lever I8 thus moving it forward and operating the various contacts and controls as previously described. The motions so far described are those which occur when spinning from a single roving.

Detecting mechanism operation when spinning from a double roving It is also common practice to take roving from two bobbins in the creel and spin them into a. single end of yarn. Occasionally, in this type of spinning the roving supplied from one bobbin breaks in the creel. This may result in the continued spinning of a strand of yarn from roving being drawn from only one bobbin. The application of the mechanism to this problem will now be described.

The principle involved in the detection of a strand of yarn being spun from a singling roving is not in itself new. As dealt with in this invention the detecting wire is forced against the strand of fibers being spun sufliciently to strain the strand so that it will break it, if it is only being spun from a single roving but not hard enough to break it, if it is still being spun from a double roving. This action is illustrated in Figure 9. When the motion is started the detector wire 66 first contacts the strand of fibers then tilts downward so that the rear of the detector wire rides over the end of the lever I8. As the motion progresses the rear of the detector .15 ball of lint on the underclearer roll continues to build up, if the end is not pieced-up the lever 249 is moved further in a rearward direction and in the resulting motions eventually the contact nob 260 reaches the contact base 263 and this action actuates the interrupter mechanism.

Alternative mechanism The detecting mechanism shown in Figure 29 is in many respects similar to that shown in Figure 2. So, for the parts of Figure 29 which correspond substantially to those of Figure 2, similar numbers have been used but raised into the 300's. The main operating detector wire 366 is provided with a catch wire 30! which is provided with a portion 368 adapted to' contact the strand of fibers being spun. The wire 30! is hung and rotates freely on the wire 366 as indicated. As the mechanism starts to operate and the wire 366 is moved forward, the movement brings the portion of the catch wire 363 into contact with the strand of fibers R. and the catch wire is thus rotated carrying its rear portion 302 inwards and upwards. The trip wire 305 is also pivotally mounted on the cross bar 310 and extends forward and backward having a forward portion 3 and a rearwardly extending portion 3l2 which is sufficiently heavy to overbalance the front portion. As the motion of the detector develops a lateral extension of the rear portion 3l2 rides along the top of the box raising the front portion 3!! until it comes into contact with the back edge 302 of the catch wire which has been rotated inward as explained above. The laterally extending portion of the back of the catch wire is then carried upward by the forward portion of the trip wire 3 until its arms contact the wire 366 where it is stopped. Thus the rear part of the trip wire 3l2 is caused to clear the catch lever 318. The wire 366 is controlled in its motion by its hinging to the cross bar 3I0 mounted on the pedestal 365 and the lateral loop 3l3 of one arm which rides between the top 315 of the box 351 and a wire on the side of the box. As soon as the trip wire 3 is held by the extension of the catch wire 302 coming in contact with the main detecting wire 366 then the whole wire mechanism is governed to ride downward out of contact with the strand of fibers by the contour of the cam 3l5. These motions continue as long as the strand of fibers R is intact.

When the strand of fibers R. is broken the catch wire 30I has no outside turning force applied to it, so it does not engage the trip wire 3| I as it rises toward the detector wire 366. The rear extension of the trip wire H2 is thus allowed to engage the hook 380 on the lever 318. This action develops control motions similar to those described in connection with Figure 2.

For example, the lever 318 has a rearwardlyextending arm 382 and a forwardly-extending arm 383. The lever 318 is pivoted to the side of the box as at 319. The end of the lever 382 is pivotally connected as at 384 to a piston rod 385. The piston rod 385 is connected to a piston head 386 which operates in a cylinder 381. A supply line 388 supplies air to the lower end of the cylinder and another line 388 connects the lower end of the cylinder with the interrupting unit, for example, through a supply line I66 as shown in Figure 4a.

Normally the piston head 386 blocks the bottom part of the cylinder 381 and prevents air passing through the supply line 388 to the interrupter line 389. But, when the lever 318 is 16 pulled forward the plunger 388 is lifted'allowing air to pass from the line .388 to the line 389. A latch lever 390 arranged in the same manner as the lever in Figure 1 serves the same function. The valve arrangement involving the plunger 386 is of a known or customary type and is not per se" a part of the invention but merely a convenient type of element for the combination claimed. Figure 32 illustrates this tripping motion. The same results can be developed by having the catch wire catch the trip wire when the controls are to be actuated and allowing it free motion when the strand of fibers is intact.

In cases where it iswished to check spinning from a double roving the cam 315 is designed to pull "the main operating detector wire 366 up into contact with the strand R to a predetermined point, after the primary strand detecting motion has been completed. Another possible variation in the detecting motions of the detector shown in Figure 29 is one in which the catch wire 30l is normally held against the main operating detector wire 366 by the front end of the trip wire 305 while'in the rest position. At the start of the detecting motion the rear of the trip wire 305 rides in a groove which acts as a cam surface and is carried upward so that the catch wire is released by the downward-motion of the forward end of the trip wire. The catch wire then tends to rotate but if the strand of fibers is intact it is held in a position so that its rear edge will intercept the path of the forward end of the trip wire. If, however, the strand of fibers is broken the catch wire will rotate far enough so that itsrear edge will clear the path of the end of the trip wire. The'further relative motions are then similar to those outlined previously.

When it is not necessary to test for spinning from a double roving the construction of the detector can be modified so that the main operatmg detecting wire 366 can be held in firm association with the box frame and the trip wire 305 really becomes a portion of the elevating plate.

Alternative form interrupting mechanism Figure 33 illustrates an alternative form of interrupting mechanism. This mechanism is mounted on the bar 400 having transversing action, which normally carries the trumpets just in rear of the back drawing rolls B. The mechanism includes a tube and trumpet combination 440 which guides the roving to the drawing rolls. Just behind the drawing rolls is a solenoidoperated riser 402 which is actuated by the solenoid 403 energized from the detecting mechanism. The end of the riser 402 is equipped with a head 404 for interrupting the roving. The head 404 is raised into the tube 440 through an openmg in the bottom of the tube 420 by the riser. The brackets 4l2 are pivotallyconnected to the frame of the mechanism and there is mounted thereon a roll 5 and another roll 6 having friction contact therewith.

In the top of the tube there is an opening 410 through which the roving may be contacted by the roll M5. The bracket 4| 2 is normally held in position with the rolls out of contact with the roving as shown in Figure 33 by a spring 4| 8. When the roving is broken and it is desired to feed it into the drawing rolls it is merely necessary to push the rolls downward into position where the lower roll is in contact with the roving and to rotate the upper roll in counter-clockwise directionthus rotating the roll 5 in clockwise direction and causing" theroving in the tube-- to be pushed forward toward the drawing rolls. There is a catcliill-"which is adapted to hold the riserin the upper'position in the tube to stop anytendency oi -the roving to fall out after it has been interrupted by trapping it against the top of the-tube. The riser isreleased by a lever mechanism'actuatedwhen the roll 4l6'is' pushed forward;

Figure 35" shows anarrangement 'very' similar to that of-Figure- 34 and like" numbers have been given except that they have been raised by 100. Instead" ofthe roller M5 the-bracket includes a lever-5 Epivotall-y mounted asat 5 ll. The top of the lever bracket includes afinger rest 585 and downward and forward pressure on' this'iinger rest causes'the foot ofthelever 515 to enterth'e slot escinthe tube; and to push the roving'forward so as to feed it to thedrawing rolls. The same-catchzarrang'ement as in-Figure 34 is used to i hold theriser-in upper position and itis released in thesarne manner'by a" lever-connec-tio when the automatic feedis actuated. V

It" is understood that the expedientsspecifically'illustrated" are" merely preferred forms embodying the inventiveconceptand thatthe scope of the? invention should: not be limited to them; 'lhesub titles-used are merely'to' facilitate referenceand shiouldiotherwise bc disregarded;

l Aspinning'frame; comprising;ja plurality-of spindieson' each of which yarn is spun, a setjoi. drawing; lCOHS'fliOliIiWhiCh" the strand'is .ied to the spindles; creel andla plurality of roving bobbins on t'nfilclfeel'fl'Oiil' which therovingis fed to the drawingroll's' andcollecting, means for scavenger waste, means for drivingthe drawing rolls. and commonidrivingmeans for aplurality of spindles, separate detecting. means for, eachspindle; re.- sponsive to ends. which. arenotlintact separate interrupting means.iore,ach.,spindle forfstbpping the roving beingied to thatspindle ata position prior to the entry, of the roving. intolthe-dr'awing rolis, each of. said. detecting means. including. a pivot-ed support',,mcans. for pivoting said support in reciprocating. movements, a. sensing element pivoted to said sunporttandhaving an. extending portion or. engagementwith.thestrand of fibers being s un; and abaiancihglnortion extending in an opposite dir ec.tion;.fi'om..the. pivotal. point, the balancing, portion of the. sensing element being adapted to over-balances the. extending portion whereby, the balancing, portion; tends to. take. a predetermiiiedi patlLinfthe-absence of. pressure on er: ending} nor-tion, a. switch element. having n, switch member. projectingwithinsaid predetere "h, the reciprocating, movements of the support. being adapted.v to. cause. movement of. the

fig eiementihtc the normaL-pathjof; the and or fibers'beinggspun whereby said extends ing-portion'is defi'ecte'dwhen the strandis intact causing the balancing? portion'to clear n member, said switch member'being connected to the interrupting means for that spindle: v

2;-A- spinning frame according to claim 1,"in which there. is a switch act'uable by the movementat said switch element, said switch being connected-to asignaL.

3,. A spinning frame. according: to claim- 1, including-a catch actuable by the movement of said switch element t0;retairr.said.support stationary when theswitch element is in. closed position.

inst spinning frame: according: to claim 1;, in

which the supportis mounted on a" base,- afluid pressure expansible'member-between the-support and the base; a receiving chamber common to-a plurality of said expansible-membersya connec tion between said receiving chamber and said'expansible members, a bleeding orifice said chamber, an admitting orifice insaid chamber, a safety valve attached to said'chambensaid chamher being connected with an automatic admission valve which allows the fluid to be admittedtothe pressure system as required.

5. A spinning frame, comprising, a plurality-of spindles on eachof which yarn is spun, a, set-of drawingrolls from: which the'strandis fed to the spindles, a creeland a plurality'of roving bobbins cnth'e creel fromwhich the roving isfed to the drawing rolls and collecting" means for scavenger waste, means for drivingthe drawing-rolls; and common driving-means for a plurality-ofspindlesi separate detecting means for each spindle ref sponsive to ends. which are not' intact, said dee tecting means including a switch,,separate in? terrupting means--for each spindle for'stopping the roving'being fed"to-that-spindleata position prior to the entry of the-roving-intothe-drawing rolls, said interruptingmeans including an.'in terrupter head adapted'to crossythe pathzof. the roving-and to sever itprior-toits entrybetween the 'drawingrclls; asupport connectedto saidiinterrupterhead, means normally urgingsaidsup port in a direction to cause the-interrupterhead tomove acrossthe path of the'roving, acatch mechanism normally retaining said support in restposition and meansactuated bysaid detect: ing means for releasing the catch mechanism said means including a solenoid in'circuit with. the switch on said: detecting means 1 f f 6.. A spinning frame, comprising, aplurality of spindles on each ofwhichyarnisfspun, a' s,et;o.f drawing rolls from which the str'andiis fed'tothe, spindles, a creel and a plurality ofroving'bobbins onthe creel from which the roving isfed to, the drawing rolls and" collecting meansgfor scavenger waste, means for driving the drawingrolls and common driving-means fora plurality'ot'spindles, separate detecting means for each spindle. responsive to endswhich are-not intact, separate interrupting means for each spindle for stopping the rovingbeing fed to Y that" spindle at a position prior to the-entryof the roving 'into the drawing rolls, each ofsaid detecting'means' including. a movable member adapted to move in a testing cycle, means for moving saidmember, asensing member reacted upon by the strand, control means, the sensing member-movable by said movable. member and being adapted to allow the movement" of said movable member to causejoperatiorrof said control means when that strandi's not. intact, said sensing; member adapted'jto. be held by the strand'when intactso that saidinorable-memberdoes notcauseactuation of thec'on: trol. means, each interrupting means being res sponsive. to its respective contrclme'answhereby when an end isnot intact the rovinggissevered priorto reachingthe'drawing rolls; A

7. A spinning-frame,comprising, aplurality of spindles on each of-which yarnfis, spurr auset-of drawing rolls from whichthe strand is, fed. tovthe spindles, a creel and a plurality of'roving-bobbins on the-creel from which the roving isfedto the drawing rollsand collecting means for scavenger waste, means for driving. the drawing. rollsi and common driving means-for. a plurality oi. spindles, separate detecting means for each spindlere sponsive to ends which are not'intact, separate interrupting means for each spindle for stopping the roving being fed to that spindle at a position prior to the entry of the roving into the drawing rolls, each of said detecting means including a pivoted support, -means for pivoting said support in reciprocating movements, a sensing element pivoted to said support and having an extending portion for engagement with the strand of fibers being spun and a balancing portion extending in an opposite direction from the pivotal point, the balancing portion of the sensing element being adapted to over-balance the extending portion whereby the balancing portion tends to take a predetermined path in the absence of pressure on said extending portion, a control element having a control member projecting within said predetermined path, the reciprocating movements of the support being adapted to cause movement of the sensing element into the normal path of the strand of fibers being spun whereby said extending portion is deflected when the strand is intact thereby causing the balancing portion to clear said control member, said control member being connected to the interrupting means for that spindle.

8. A spinning frame according to claim '7, including a catch actuable by the movement of said control element to retain said support stationary when the control element is in closed position,

9. A spinning frame according to claim 7, in which the support is mounted on a base, a fluid pressure expansible member between the plate and the base, a receiving chamber common to a plurality of said expansible members, a connection between said receiving chamber and said expansible members, a bleeding orifice in said chamber, an admitting orifice in said chamber, a safety valve attached to said chamber, said chamber being connected with an automatic admission valve which allows the fluid to be admitted to the pressure system.

10. A spinning frame, comprising, a plurality of spindles on each of whichyarn is spun, a set of drawing rolls from which the strand is fed to the spindles, a creel and a plurality of roving bobbins on the creel from which the roving is fed to the drawing rolls and collecting means for scavenger waste, means for driving the drawing rolls and common driving means for a plurality of spindles, separate detecting means for each spindle responsive to ends which are not intact, separate interrupting means for each spindle for stopping the roving being fed to that spindle at a position prior to the entry of the roving into the drawing rolls, each interrupting means being responsive to its respective detecting means whereby when an end is not intact the roving is severed prior to reaching the drawing rolls thereby to prevent feeding of the roving from the creel without stopping the spinning of unbroken ends on other spindles thereby to reduce the collection of waste in said collecting means, and means associated with each interrupting means for feeding the forward end of the roving between the drawing rolls including means for supporting the roving, and a movable element positioned adjacent to the roving and adapted to be moved downwardly and forwardly in contact with the roving.

11. A spinning frame, comprising, a plurality of spindles on each of which yarn is spun, a set of drawing rolls from which the strand is fed to the spindles, a creel and a plurality of roving bobbins on the creel from which the roving is fed to the drawing rolls and collecting means for scavenger waste, means for driving the draw ng rolls and common driving means for a plurality of spindles, separate detecting means for each spindle responsive to ends which are not intact, separate interrupting means for each spindle for stopping the roving being fed to that spindle at a position prior to the entry of the roving into the drawing rolls, each interrupting means being responsive to its respective detecting means whereby when an end is not intact the roving is severed prior to reaching the drawing rolls thereby to prevent feeding of the roving from the creel without stopping the spinning of unbroken ends on other spindles thereby to reduce the collection of waste in said collecting means, and means independent of the drawing rolls for causing flying broken ends to migrate to said underclearer roll.

12. A spinning frame according to claim 11, wherein the means for causing flying broken ends to migrate to said underclearer roll includes means for creating a jet of air.

13. A spinning frame, comprising, a plurality of spindles on each of which yarn is spun, a set of drawing rolls from which the strand is fed to the spindles, a creel and a plurality of roving bobbins on the creel from which the roving is fed to the drawing rolls and collecting means for scavenger waste, means fordriving the drawing rolls and common driving means for a plurality of spindles, separate detecting means for each spindle responsive to ends which are not intact, the detecting means including a sensing member adapted to sense the strand of fibers being spun at a position between the drawing rolls and the spindle, separate interrupting means for each spindle for severing the roving being fed to that spindle at a position prior to the entry of the roving into the drawing rolls, each interrupting means being responsive to its respective detecting means whereby when an end is not intact the roving is severed prior to reaching the drawing rolls thereby to prevent feeding of the roving from the creel without stopping the spinning of unbroken ends on other spindles thereby to reduce the collection of Waste in said collecting means, means for urging the sensing member into the path of the strand, a movable member whose movement causes the action of the interrupting means, and means active depending upon the position of said sensing member for moving said movable member.

14. A spinning frame, comprising a plurality of spindles on each of which yarn is spun, a set of drawing rolls from which the strand is fed to the spindles, a creel and a plurality of roving bobbins on the creel from which the roving is fed to the drawing rolls and collecting means for scavenger waste, means for driving the drawing rolls and common driving means for a plurality of spindles, separate detecting means for each spindle responsive to ends which are not intact, a guide tube adapted to guide and support a substantial length of roving located just prior to the point of entry of the roving into the drawing rolls, separate interrupting means for each spindle for stopping the roving being fed to that spindle at a position pror to the entry of the roving into the drawing rolls, each interrupting means including an element adapted to engage the roving at a point within the tube whereby the roving is severed within said tube and the broken end remains sup ported within said tube, each interrupting means being responsive to its respective detecting means whereby when an end is not intact the roving is severed prior to reaching the drawing rolls thereby to prevent feeding of the roving from the creel without stopping the spinning of unbroken ends 21' on other spindles therebyto reduce the collection of waste in said collecting means.

15. A spinning frame, comprising, a plurality of spindles on each of which yarn is spun, a set of drawing. rolls from which the strand is fed to thespindl'es, a creel and a plurality of roving bobbins on the creel from which the roving is fed to the drawing rolls andcollecting means for scaven ger waste, means for driving the drawing rolls and common driving means for a plurality of spindles, separate detecting means for each spindle. responsive to ends which are-not intact, separateinterrupting means for each spindle for stopping the roving being fed to that spindle at a position, prior to: the entry of the roving into the drawing rolls, said" detecting means including a control member; a movable sensing member, actuating means for moving one of said members into contactwith. the other, said sensing member being urged. independently of said actuating means. into thepath of the strand of fibers being spun, said sensingmember being adapted to be. engage'dand. retained by the strand when intact but to be moved past the normal path of the strand when the latter is not intact;

16.. A spinning? frame, comprising, a plurality ofspindles on each of which yarn is spun, a set of drawing rollsfromwhich the strand is fed to the spindles, a creel and a plurality of roving bobbins on the creel from which the roving is fed to the e drawing. rolls and collecting'means for scavenger waste, means for; driving the drawing rolls and commondriving means for a plurality of'spindles, separate detecting means. forieach spindle responsive to ends which are not? intact, separate interrupting-meansv for each spindle forv stopping theroving'being'fedtothat'spindle at a position prior to the entry of theiroving into the drawing rolls, each detecting means including a sensing member mounted for movement from a first'neutral position to a second strand sensing position to a third strand broken position, means for moving said sensing: member. from said first to said second and third position, said means including a movable" member, actuating'means for actuating said movable member whereby'it moves the sensing member at least from first to second position, and means acting on said sensing member to cause its movement from second to thirdposition when the. strand is broken.

17. A spinning frame, comprising, a plurality of spindles on each of which yarn is spun, a set of drawing rolls from. which the strand is fed to the spindles, a. creel and a. plurality of roving bobbins on the creel: from which. the roving is fed to the. drawing rolls and collecting means for scavenger waste, means for driving the drawing rolls. and common. driving means for a plurality ofv spindles, separate detecting v means. for. each. spindle responsive to ends which are: not intact,

separate interrupting means for each spindle for stopping the roving being fedto thatspindle at a position prior to the entry of the roving into the drawingrolls, each detecting means including a support member, for movement between a neutral position and a strand access position, a sensing member supported by the support member for movement between a strand sensing position and a strand broken: position, actuating means for moving said supporting member, control means, one of said members being adapted to cause the other member. to actuate saidcontrol means. when the sensing member is in strand broken position.

18. A spinning frame, comprising, a plurality act-12,230

22 off spindles on? each off which yarn is spun, a set of drawing" rolls from which the strand is fed to the-spindles, a creel anda' plurality of rovingbobbins on the creel from which the roving'is fed to the drawing rolls and collecting-means for scavenger waste, means for driving the drawing rolls and common driving means for a plurality ofspindles, separate detecting means for each spindle responsiveto ends which are not intact,

' separate-interruptingmeans for each spindle for stopping the roving being fed to that spindle at a position prior to the entryof the roving into the drawing rolls, the detecting means including a movable member'mounted to move in a testing 1 movement, a sensing member for sensing the strand being spun movable by the movable memher, a switch mechanism, the action of the interrupting means actuable by said switch mech anism, means normally causing the sensing member to cause actuation of'said. switch mechanism, the sensing'member' being held by the strand of fibers being spun when intact fromactuating said actuating member; as itmoves from said second to said third position.

19'. A spinning frame, comprising, a plurality of spindles: on a each of which yarn is spun, a set of drawing rolls from which the strand is fed to the spindles, a creel and aplurality ofroving bobbins. on the creel from which the roving is fed to the drawing rollsand collecting means for scavenger. waste, means fior driving the drawing rolls andicommon drivingmeansifor a plurality of spindles, separate detectingmeans for each spindle responsive to ends which are not intact, separate: interruptingmeans for each spindle for stopping the roving being fed tothat spindle at a position. prior to the entryof the roving into the drawing rolls, the detectingmeans-including a movable member, a sensing member pivotally icuounted on said movable member and weighted whereby one end engages said strand and the other end is elevated adapted to sense whether the strand of fibers bein'g spun is intact or broken, switch means actuable by'engagement with the sensing'member, the movable member adapted to act onthe sensing member to move it into con tact with the-switchmeans only when the strand isv broken, each interrupting means being responsiveto the. switch means of its respective detecting means whereby when an end is not intact the rovingv issevered prior to reaching the drawing rolls.

20. A spinning frame, comprising, a plurality of spindles. on. each of. which yarn is spun, a set of drawingrolls from which the strand is fed to the spindles, a creel and a plurality of roving bobbins. on the creel from which the roving is fed to: the. drawing rolls and collecting means for scavenger waste, means. for drivingthe drawing rollsand. common. driving means for a plurality of spindles, separate detecting means fo each spindle responsive to end-s which are not intact, separate interrupting means for each spindlefor stopping theroving; being. fed toithat'spindle at a I position. priortothe entry of the roving into the drawing rolls, each of: said: detecting means in cluding a'movable memberjadapted to: move in a testing cycle, meansfor m-ovingsaid: member, a sensing member-pivotally mounted onsaidmovablemember andadapted to be reacted: upon by the strand, said sensing member having a sensing part adapted to engagethe strand and a balancing; part. adapted, to overeb'alance the member when the strand. is. broken, switch'means; the sensing member being arranged to allow the movement of said balancing part into ngagement with said switch meanswhen the strand is not intact, said sensing member adapted to be held by the strand when intact so that said movable member does not come into engagement with the switch means, each interrupting means being responsive to its respectiveswitch means whereby when an end is not intact the roving is severed prior to reaching the drawing rolls.

21. A spinning frame, comprising, a plurality of spindles on each of which yarn is spun, a set of drawing rolls from which the strand is fed to the spindles, a creel and a plurality of roving bobbins on the creel from which the roving is fed to the drawing rolls and collecting means for scavenger waste, means for driving the drawing rolls and common driving means for a plurality of spindles, separate detecting means for each spindle responsive to ends which are not intact, separate interrupting means for each spindle for stopping the roving being fed to that spindle at a position prior to the entry of the roving into the drawing rolls, each detecting means including a control member, a movable sensing member, actuating means for moving one of said members into contact with the other, said sensing member being movable from a first neutral position to a second strand sensing position to a third strand broken position, means urging said sensing member independently of said actuating means from said second position to said third position, the strand normally reacting on said sensing member to retain it in said second position against the tendency of said means urging it towards said third position, actuating means responsive to the position of oneof said members adapted to be actuated through the movement of the sensing member from second to third position.

22. A spinning frame, comprising, a plurality of spindles on each of which yarn is spun, a set of drawing rolls from which the strand is fed to the spindles, a creel and a plurality of roving bobbins on the creel from which the roving is fed to the drawing rolls and collecting means for scavenger waste, means for driving the drawing rolls and common driving means for a plurality of spindles, separate detecting means for each spindle responsive to ends which are not intact, separate interrupting means for each spindle for severing the roving being fed to that spindle at a position prior to the entry of the roving into the drawing rolls, each detecting means including a control member and a sensing member located adjacent thereto, said sensing member being adapted to contact the strand between the drawing rolls and the thread guide, actuating means for moving one of said members into contact with the other, other means normally urging a contacting part of said sensing member into the path of the strand of fibers, said contacting part of the sensing member being adapted to be engaged and retained by said strand when intact but when the strand is not intact to move past the normal path of the strand, each interrupting means being responsive to its respective detecting means whereby when an end is not intact the roving is severed prior to reaching the drawing rolls thereby to prevent feeding of the roving from the creel without stopping the spinning of unbroken ends on other spindles thereby to reduce the collection of waste in said collecting means.

23. A device according to claim 22 wherein the movable member is a piston operating in e, cylinder, the cylinder has an air outlet port normally closed by the piston, and the piston is moved by the sensing member when the strand is broken to uncover the port, the interrupting means being air operated and having a communication with said port.

24. A spinning frame, comprising, a plurality of spindles on each of which yarn is spun, a set of drawing rolls from which the strand is fed to the spindles, a creel and a plurality of roving bobbins on the creel from which th roving is fed to the drawing rolls and collecting means for scavenger waste, means for driving the drawing rolls and common driving means for a plurality of spindles, separate detecting means for each spindle responsive to ends which are not intact, separate interrupting means for each spindle for stopping the roving being fed to that spindle at a position prior to the entry of the roving into the drawin rolls, the detecting means including a movable sensing member adapted to sense whether the strand of fibers bein spun is intact or broken, control means actuable by the movement of the sensing member, and movable means adapted to act on the sensing member to move it into contact with the control means when the strand is broken, the sensing member being pivoted on said movable means and having a sensing part and a balancing part, the balancing part being adapted to urge the sensing part into the path to move the control means when the strand is broken, the control means including a switch arm movable by engagement with the sensin member, each interrupting means having instrumentalities responsive to the control means of its respective detecting means whereby when an end is not intact the roving is severed prior to reaching the drawing rolls thereby to prevent feeding of the roving from the creel without stopping the spinning of unbroken ends on other spindles thereby to reduce the collection of waste in said collecting means.

25. A spinning frame, comprising, a plurality of spindles on each of which yarn is spun, a set of drawing rolls from which the strand is fed to the spindles, a creel and a plurality of roving bobbins on the creel from which the roving is fed to the drawing rolls and collecting means for scavenger waste, means for driving the drawing rolls and common driving means for a plurality of spindles, separate detectin means for each spindle responsive to ends which are not intact, separate interrupting means for each spindle for stopping the roving being fed to that spindle at a position prior to the entry of the roving into the drawing rolls, each of th detecting means including an element adapted to contact the strand of fibers being spun, a cam mechanism for each element, each cam mechanism including a cam track, each element including a cam engaging member engaging in said track, control means on each cam mechanism in said track whereby it can be engaged by said cam engaging element, common means for operating the cams for a plurality of the elements, the detecting element being arranged so that cam element engage control means only when the strand of fibers being spun is not intact.

26. A spinning frame, comprising, a plurality of sp ndles on each of which yarn is spun, a set of drawing rolls from which the strand is fed to the spindles, a creel and a plurality of roving bobbins on the creel from which the roving is fed to the drawing rolls and collecting means for scavenger waste, means for driving the drawing rolls and common driving means for a plurality of spindles, separate detecting means for each spindle respon-

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