US2610512A - Yarn carrier rod control mechanism for knitting machines - Google Patents

Description

Sept. '16, 1952 c, P|NGEL 2,610,512

YARN CARRIER ROD CONTROL MECHANISM FOR KNITTING MACHINES Filed April 25,1951 5 Sheets-Sheet 1 Z .5 //i I 66 I i a \J 75 .2 6

O O0 fi INVENTOR Hen/1 CUP: el

BY p j ATTORNEY INVENIOR BY Henr GP 1 ATTORNEY 3 Sheets-Sheet 2 YARN CARRIER ROD CONTROL MECHANISM FOR KNITTING MACHINES Sgpt. 16, 1952 Filed April 25, 1951 P 16, 1952 H. c. PINGEL 2,610,512

YARN CARRIER ROD CONTROL MECHANISM FOR KNITTING MACHINES 3 Sheets-Sheet 3 Filed April 25, 1951 INVENTOR Patented Sept. 16, 1952 UNITED STATES YARN-CARRIER ROD CONTROL MECHANISM on KNITTING MACHINES Henry C. Pingel, Wyomissing, Pa., .assignor to Textile Machine Works, Wyomissing, Pa., 2.

corporation of Pennsylvania Application April 25, 1951, Serial No. 222,831

14. Claims. .(Cl. 74-112) This invention relates to an apparatus for reversely rotating saidspindle the pawls beingaotuated by a singleconnecti'on from a cam lever, one pawl on the upstroke of the connection and the other pawl on the downstroke of the connection. The downstroke has been causedby a cam on the main camshaft and the upstroke caused by spring action. This mechanism has also included a cam means normally holding one pawl out of operation while permitting the other pawl'to operate, the cam means being operated at'time sirom the ordinary pattern chain of the machineto hold the other pawl out of operation and to permit the one pawl to operate. The cam means is'returned to normal position by spring action.

'HOWBVGI, this cam means becomes jammed at times during its operating movement't'o prevent itsreturn to normal position by the spring action, thereby defectively operating the reinforced selvage spindle. It is an object of the'invention to provide a mechanism for operating a reinforced selvage spindle which shall be entirely free from this di'mculty. I

. :A further object of the invention is to, provide a reliable, eflicient and long lived mechanism for racking a spindle infeither direction as desired. v

Another object of the invention is toprovide a discriminating mechanism adapted to reverse the directionof rotation of a racked spindle and which is me of any spring oi a size rendering the mechanism subject to jamming.

With these and other objects in View, which will become apparent from .the following description of the illustrated embodiment of the invention shown in the accompanying drawings, the present invention. residesin' the novel elements; features 1 of construction andarrangement of parts in cooperative relationship as hereinafter more particularly pointed out in the claims.

In the drawings:

1 Figure..1 is' a sectional elevation of alknown type of full-fashioned knitting machine having the invention applied thereto andembodied therein, parts being omitted;

Fig. 5 is a detailview taken substantially on the line 55 of Fig. 1, looking in the direction or" the arrows, parts being broken away and others in section; v V V Fig. 6 is a detail elevational view of certain of the parts shown in Fig. 3; f

Fig. 7 is a detailed view of a portion of Fig. 6, parts being broken away and others shown in section;

Fig. 8 is a View taken substantially on the line 8-8 of Fig. 1, looking in the direction of the arrows, parts being in section;

Fig. 9 is a detail view similar to a portion of the mechanism shown in Fig. 1, parts being broken away and other parts being omitted for purposes of illustration;

Fig. 10 is a detail View similar to Fig. 9, parts being omitted, other parts being further broken away and certain partsfbeing shown in different positions from the ones in which they are shown in Fig. 9;

Fig. 11 is a view similar to Figs. 9 and 10, parts being broken away and certain parts being shown in'the same positions as in Fig. 9,Fi'g. 11 showing however, parts omitted in Figs. 9 and '10;

Fig. 12 is a View similar to Fig. 9' but with more parts broken away to show a second mechanism, one generally similar to that of Figs. 9

' and 10, which lies behind the parts shown in Fig. 9; and

Fig.' 13 is a view generally similar to Fig. 12 but further broken away and certain parts shown in different positions from the ones in which they areshown in Fig. 12. a

In the drawings and description, only the means necessary to a complete understanding of the invention are specifically set forth; further information as to the construction'and opera- ;tion of other related, usual andwell known knitting machine elements, mechanisms, etc., may be found in one or'more of the following publications:

1. Pamphlet entitled-Full-FaLshioned Knitting lVlachines--pu.blished and copyrighted by the Teiitgile) Machine Works, Reading, Pennsylvania, in 2 operating at the timer-any given operation of".

"able to'have two oppositely inclined.- ratches on normally in contact therewith to'hold theaspindle:

H against undesired movements. Also, camor 3 7 means provided to lift'a first pawl from its lratch'et whena secondpawlfis to' opera-te it similar attachment is provided near the right end of the machine for controlling the inner position of the yarn carriers for theright-reinforced areaf 1 of the stocking blank. I Both left and right 'attachments, except that they are'of opposite hand,

2. Four catalogs entitled-The Reading Full-Fashioned Knitting Machine Parts Catalog -published and coyrighted by the Textile Machine Works, in 1929, 1935, 19% and 19 i7, respectively.

3. Booklet entitledThe Reading High Production Full-Fashioned Knitting Machine which,'forming a supplement to the above noted 1940 Parts Catalog of the Textile Machine Works, is a publication ofthe Textile Machine Works,. copyrighted by the latter in 1940. 7

turespub1ished by the Wyomissing Polytechnic Institute, Wyomissing, Pennsylvania, in 1935. v

' An apparatus according tothe inyention comef' prises a pair of trains of'mechanism, eachtr'ain biased in a certain direction and a cam and follower means arranged to hold said trains against .i. their bias but acting to release them at desired times, together with a discriminating means 5 adapted to prevent either one of said trains from I the camand 'follower-means.

in the arrang ment shown, the two trains of" mecharii'sm"ar employedj to turn a; spindle in either directiori as desired; I-It therefOre-de'sir-T the spindle and to prev-1st pens for theratchets ratchet and to liit'the second pawl from its ratch et when the first pawl is'to; operate itsratchet; Preferably, the. racki hg jpawls are free of o bluffs when inactive and also act as holding pa -i when the trains are inactive.; @Accor'dingtc the; invention, the individual trains of mechanism are connected each to portions of the cam means in .i dividual thereto so that when onetrain actuatesAQ one pawl the portion of the bluii meansconnected; thereto not only'tdisableswtheother pawl but, due;

. ,to the inelastic character of theconnection, re.,; .5.

turnsthe bluif portion to the same inactive posi 'tion from which itst'art edand without any sub-. ,45 stantial chance of its jam rning ina wrong posi-. tion. It will be seen thatthere is a discriminating]; I

' one;on one side andone on the other side of an action at two. different poin cheat the pointsw r at which the trains receiveimpulses,andm 5 50 the points at which theydeliver them. Referring ,to the drawin s andlparticularly to i Fig. l,- the invention ishshown applied toa fullfashioned knittingmachine havinga usual framevage attachment shownis the one near the left? end of the machinefor controllingtheinner position ofthe yarn carriers for the left reinforced of the machine.- 'It' is to be understood that a are identical in structure and are operated simultaneously to position the yarnlcarrier'st-ops closer or further from each other-s0 that a description 75 7 travel.

4 of the left attachment shown will also suifice as a description of the right attachment.

The spindle 24 carries a nut 25 (Fig. 3 which is provided with stops (not shown) against which the carrier rod or rods for the left reinforcing yarn carriers abut at the inner end of, their An,imprilse from cam, for-turning spindle 24 is transmitted to the spindle by mechanism including a follower 28 mounted on a lever 30 pivoted intermediate its ends On a pin 3| carried in Pa ph ed:K it ne;.Ma hin aj bracket 32 ,o'n,,the back beam ll. The pint! .atuthe left of follower 28 and the lever 38 is biased to turn clockwise as viewed in Fig. 1. The

.1t'o maintain the spindle 26 stationary during the vinajority of the revolutions made by the cam shaft for making a given stocking blank, a lever 34 is v provided to normally support the right hand end of lever tc, as'viewed in Fig. 1', in the position to which it is raised .bythe high point of the cam.

Due to the right end oflevery30 restin on the upperend of lever 34 as shown, spindle 24 remainsstationary until lever,34 has been moved to releaselever im. For so moving lever-3 5, the lever is pivoted ona fixed axle 36 and itselower v portionis adapted to be operated at desired times by a pattern means of known form indicated somewhat generally'atfl. Eattern means 48 is 1. 9, bea s m d a includ n a p t rn hai ru ning on sprocket drum 4 l A button on the chain operates. to swing lever 34 clockwise as viewed from the right of Fig. 1 to carry to upper end or lever ,34 out from under the right handfree end 1:0:fihe'leyr'fiflQyThE previously mentioned bias of levertfl causes the lever to oscillate downjand up as the follQwerjzfi followsthe contour of the cam fromythe high pointofthe cam to'the low pointand'baek. ThemeanS for biasing lever 39 is provided in thearrangement ,ShOWn as an incident to thetrains of mechanism AandB (Figs. 1 and 4') for transmitting impulses from the cam 22 to the spindle 24. a

.fiThe-vt f i s 9f. mecha m A and each prise one orra pair of lever members 44 and 45,

respectively,;pi voted onrthe pin 3| and arranged springsJoeingintension and connected at their lower; ends to members 44 and 45 and at their upper endstofixedportiong of the frame. The

tension of'springs 58 therefore holds the membersflfl and 45 against set screws 48 thereby tending to turn 1ever3i3 clockwise and holding folarea of a stocking blank, as viewed fromithe frontfi' 28 my Contact 'Wlth cam Clockwise movements of iollower lever 30 and train lever members 44 and A5 thereforeare spring actuated whi'le itheir counterclockwise movements are :nqsit el wer. nima i ns caused by t e cam 22, as the follower 23 moves from the low to the high portion of the cam. There being two train discriminating means to. determine which train of mechanism is to transmit a given cam impulse to spindle 24. His to be understood that an impulse from the cam delivered throughone train of mechanism turns the spindle oppositely to a camimpulse delivered through theother train of mechanism.

' initial movements of members 44 and 45 away from the position shown in Figs. 1, 3 and 5 are spring actuated. and the levers 52 and 54 merely For this purpose, the arrangement shown in the drawings has a pair of levers52 and 54 which are mounted, according tothe arrangementv shown, to swing in a vertical plane transverse to the planes 'ofmovement oflevers ,44 and 45 as levers 52 and 54 at points 51- and-59 respectively,

so that levers 52 and 54 mustswing on their fixed pivots in synchronism. At their lower ends, levers 52 and 54 have shallow notches and BI, respectively, each of the notched ends being adapted to swing back and forth above flat surfaces 62 and 63 on levers 44 and 45, respectively. The levers 52 and 54 are soarranged, that when lever 54 overlies the surface 63 on lever .45, as shown in Fig. 5, lever 52 is out of the path of the surface 62 on lever 44 and when lever 52 overlies the surface 62,;lever 54 is out of the path of surface 63 of lever 45. Means is provided whereby link 58 is biased to hold lever 52 normally out of the path of surface 62 of lever member 44, Figs. 3 and 5, and to holdlever 54 so that its notch 6I overliesthe surface 63 on lever 45.

' However, link 58 is adapted, at desired times, to

swing levers 52 and 54 so as to reverse their positions relative to levers-44 and 45, so that fiat 62 on lever 44 will engagejin notch 60 of discriminating lever 52. The means for holding link 58, and consequently the levers 52 and 54,'in the position shown in Figs. 3 and 5 comprises a second pat-.

tern operatedlever 64 shown alongside lever 34 and adapted and arranged to be operated by buttons on the usual patternchain (not shown) of the pattern means 40. Lever 64, when operated by the pattern means, swings against a flange 68 which depends from a lever 10 which'is'fixed at the end of a shaft "I2 journalled'inbrackets fixed to the machine frameso thatthe shaft exas is clear from Fig.1. At its rear'end," the left hand end as shown in;Fig;.1, shaft12 has fixed thereon an arm 'I4:(Figs..3 and 5) which engages a pin I6 fixed tolink 58.

-Pattern' lever 64 has a-laterally extending plate I8 thereon, so that, when lever 64 is operated by the pattern means, the lever 34 is also operated without an additional adjustment of the pattern means for this purpose. The purpose of this joint operation of levers 34 and 64 is to cause'an impulse from cam 22 to be transmitted through the 'link 58 and the arm '14 draws discriminating levers 52 and 54also clockwise about pins 53 and 55, respectively, to swingthe lever 54 away from V lever 45 and to swing lever 52 above lever 44 so that the train having lever 45 therein is free to operate and the train having lever.44 therein is prevented from operating. Itis 'feasibleto use an arrangement of this character because the hold one or the otherof levers 44 and 45 against movement by one or the other of springs 50 without interfering in any way with themotion of follower lever 30 or the cam 22. As soon as the pattern means releases the flange 68 by returning lever 64 to inactive position the shaft 12, arm 14 and the discriminating levers 52 and 54 are returned to the positions shown in Fig. 5 by a tension spring 82 which is connected between a pin 84 fixed on bracket 56 and the arm I4.

From the foregoing description itwill be seen that when lever 34 alone is operated to release follower lever 30, lever 44 operates while lever 45 and its train are not affected. The lower ends of levers 34 and 64 are connected in the usual manner (not shown) to rods 83 which extend along the machine and are connected to levers similar to levers 34 and 64 for operating the aforementioned right selvage attachment. Therefore, when the pattern means operates lever 34 or levers 64 and 34, as herelnbefore set forth. to control the rotation of the left spindle 24,

- a fixed part of the machine. Each of bell-crank te'nds from the front to. the back'of. the machine,

levers and BI have substantially vertically extending arms carrying floating pins 94 (Fig. 1)

and 95 (Fig. 4), respectively. It will be seen that as train lever members 44 and 45 swing up and down, the pins 94 and 95 will move back and forth in substantially horizontal lines. Each of pins, and 95 has two links pivotally connected thereto and arranged one above the other, links 96 and 98 being pivoted on pin 94 and links I00 and I02 on pin 95. Link 96 is the lower one on pin 94 and link 98 isthe upper one. Similarly, link I00 is the lower link on pin 95 and link I02 is the upper one. One of said upper links is pivoted at its end removed from its floating pivot to a lever pivoted on spindle 24. As shown, link 98 is pivoted at l04 to a bell-crank lever I05, best shown in Fig. 9. Lever I06 has pivoted thereto a pawl I08 for racking spindle 24. This pawl cooperates with ratchet wheel I I0 fixed on spindle 24 toturn the spindle in the clockwise direction as viewedin Figs. 1 and 9-l3. A spring H2 is connected between the pawl I98 and lever I06, to keep the pawlnormally in engagement with a tooth of ratchet I I0. I

Also, the lower link I00 connected to floating pin 95 is shown as pivoted at I I4 to a bell-crank lever I I6 to which a pawl I I8 (Fig. 12) is pivoted. This pawl cooperates with a ratchet wheel I 20 fixed on spindle 24 to turn the spindle in the counterclockwise direction as viewed in Figs. 4 and 9-13. A spring I2I (Fig. 8) acts normally to hold pawl I I 8 in contact with a tooth of ratchet I20.

As pawl I08 acts oppositely to pawl H8 and the teeth of ratchet wheelIIIl are opposed to those of ratchet wheel I20 and both pawls are in contact with their ratchets when the spindle 24 is idle, there is no need of holding pawls for spindle 24 but a discriminating means is needed to prevent one pawl from acting as a holding pawl while the other is operating to transmit an impulse from cam 22 to spindle 24. For this 1i -2;61i0",-512 7 V 8 7 p1irpo'se; one of} the lowerlinks 2111510116 orthe releasedby tts cam portion so that -the-pawl 'stops upperlinks connectedto the floatingp'ins'is conspindle 24-as-- soon'asit has been turned a one -nected"-to a'cam or blufr adapted to disable one tooth distance. r 7 f the pawls I08 andIIBJ Inthe arrangement I 'It-willbeseeniroinFig: Bthateam' portions f shownflowerlink 96 'which 'is connected to pin -5 I 28 and I3-8and their supporting members I26 '54 is also pivoted'at I24-to='a cam 'or bluffjmeans and I36 lie intermediate the-ratchets- III] and 7 comprising a'ring I26'mounted'to oscillateabout I26 C'am'portions' I28 and I38 are, however,

' the spindle 24 and-'havihg thereon' a carn por- --'automatically operatedand stand wheninactive tio'n" I28 acting when pin'94 is reciprocatecl to out-of contact with the'pawls I08 and H8, there- -disable=pawl IIS by {contacting a lug'liifl-(Figs by permitting these=pawls to hold the spindle 9 and 10) onpawl IIB'wSimiIarIy; the upper link locked, whereas it is desiredat times-tomanually 3 5 IQZ-connected to p'inS'J ispivoted, at point I34, turn spindle -24to reset the nut 25-.- Inorder that to cam or bluff "nleans'comprising"aring I35 the 'spindle may be so -turned, a'third cam or mounted' to cscillate'about spindle 24and havbluffm'eans' is provided comprising a-ring memirig thereori a carn pcrtion lw acting when pin her I42 "(Figg 1-1-) mountedto turn about spindle --95is-'reciprooated to disable pawl IUBby c'on'tact- 24-and'carryingtwe-cam portions I44and- I46 ing' alue I44 shown dottedin Figs. 12 and 13, -adaptedrto act on thelui: I4Ilon-pawL-I08-and on the-acticnofcam portion It'ilon lu'g I40 being i lug I353 on-pawl H8; respectively; to throw both most clearly indicatedin FigL13. 'pawls aw'ayf from the-teeth of their -ratchets so Iii the-eass of both car'n' portion I28 andcarn .20 that; the spindle may be-turnediby a h'anclle I41 portion I38 the cam' portions'are' normally in =pivotally carried on-a shaft I49 ina fixed part of positions free-of thelu'gs I39-and I40 so that the machinefframelFig. 1).--Normally;.ca'm-por- 'both*pawls IGB and II 8; arein contact with their 1 tions I44-ancl I46 are held in inoperative-posirespective*ratchet s, and the spindle 24 is -locked tionsby a ha'n'dle I48 on-an armlfiafxedto ring against rotation in either di'rection. When, how- I42; Handle I48 'comprises a knob I52 which has GG'eVer; followr lever fl is' released bythe pattern "apin I54 (Fig. 1-1) fixed'centrally therein and. means =49' through'the lever 34; shaft -12} being positioned and adaptedto'entereither of two -maintained-' stationary at the time; train lever apertures in a bracket member Iitcarried on a 'member 44 Swi s 'l'lbwa y, r by turni g fixed part of the machine frame-(Fig; 8) one of bellcrank lever 9ll counterclockwise ancl movi'ng lsaid apertures appearing at 153111.1 1; 11, A

the' floating pin 94 leftward 'as vie'wed in Fig. 9. 1 Link 98-- thereupon turnsbellcrank -lever= I65 c'ounterclo'ckwi-se about"spindle" 24 thereby moving pawl IIEB -in the-same"direction far enough for-itto drop inbehind anothertooth of ratchet I-I-il as 'show'n in Fig; 101* Pawl- IE8 is thereby put in' 'a' position to deliver a racking thrust to spindle -24fthrouglr1 ratchet IlIl as soon as the motion of floating pin94 is reversed; At the same a -time that 'pawl I93 is 'so moved donnterclock- 49". -wi'se; link 96' draws cani portion I'Zt clockwise -l compression spring (not showm- -biases pin I54 in the direction to enter an aperture I58. The pin may be withdrawn from an aperture in member I56 bypulling on knob I'52',-"whereupon the arm lfiilmay'bettzrrled to a'positionppposite the *otheraperture'. ;-It may be latchedfin; this positionzby-relea'sing the knobtopermit pin I54 to enter the aperture. In Figrll, camportions I44 and I are in-their inoperative positions so that pawls I08 and H8 mayoperatespindle 24 without hindrancex By moving 'arrn' I 59. from the about spindle 24to the position shownin Fig.-

position shown in Fig. 11' to the left so as to insert pin I54 in the leftha'nd "aperture, the pawls I08 and Ila-will bothi-belifted from:their.;ratchets by portions I44 and" I46: suiiicientlyg'to permit spindle 24 to be manually turned.

- the spindleclo'ckwiseas viewed in Fig. 10 but A further feature oi the apparatus-shown in pa wl I-I8- -remainsstationary,cam-portion- I28 the drawingsland one notr'afie'ctingthe'me'chaholding the-pawl I I8'above'the teeth of its ratchet nism according to the invention in its usual op- Iimffloweven -cain portion l23 'moves counter- P erationpis a known safety feature. comprising a 'clockwiseat the time p wl Itdmoves clockwise, ssza dflwhich han s as will '-be"seen' from' Fig.9, and pawl H8 is vertically fr'omaspivot pin'IEZ TFigF'T')"fixed to a droppedby its cam pertion quickly enough so that it fails- 'in against the tooth next the one I a bifurcated at its wlowerrendn Normally; lever I69 from which it was lifted'by the-cam portion I28; is positioned: asrin Fig dsoithatthe' nd of so that the movementof thespindle 24" is checked --'-tension'42 :of lever-30 lies intermediate the'prongs by pawl IIS as soon as} the-spindle has-turned at the bifurcated 'endof thei'lever IBQ sothat the an angulard'istanqe equal tdthator one-ratchet I *"lever 39 is'free to'mov n n wn w p r- "11 1 11; -The'-spind1e will then be locked by the 'mitted by levers'52: and 54.:" Howev'er; spindle two' pawlsas ShOWniIl F'igS; 9, 11 and 12. Q 24having'm'0vedithe nimzs a'certain distance in bracket I64 on the machineiframemThe'lever is v --Si-riiilarly; when the train 'of mechanism which however; =remaining' stationary. At the same time pawl 1G8is held stationary by floating pin 4, so far as movement about the spindle-'24 is f 7 concerned-the cam portion- I 33 is moved counter clockwise about the spindle, thereby lifting pawl I08 and permitting pawl II8 to turn the'spindle when the movement'of fioating'p'in 95 is reversed by an impulse from cam 22. Also, pawl IE8 'is either direction, Lani a'rmrsuch as the one shown at 465 in Fig; 3, which :is-.Joonnected to the nut, moves against one .or thelother of a pair 'o't collars I66 on a rod lfi8'iwhichis pivotallyconnected to lever IISEI: and which is embraced-by the lower v end 'of arm. Hi5: v:iG-o'nsecmently,when thelower end ofzarm I contacts theleft collar I66, it swings lever IISIlIito the left, clockwise as viewed in. Fig? 6, so' thatanotched surface in the lower end of theright-handaprong I12 of lever IIBU overliesa land -'II4 at-the rear end of the arm 42 to thereby prevent thelever3ll and-extension 42 'fromrdelivering an impulse'to either the 'A or v B trainszof mechanism. simuanygif the spindle 24 has been-turned to-bring the lower end of arm dot-and-dash outline in Fig. l.

in turn asprocket 208, which is shown diagram-r I65 against the right hand collar I66, as viewed move either the prong I12 or II6 above the arm 42 as and for the purpose hereinbefore set-forthi In order to return the nut25-to a position Within the limits determined by the collars I66, the spindle 24 must be manually turned by means of handlelfl.

In order to maintain the lever I60 in the position of Fig. 6, except when the lever is moved by engagement of the arm I65 with one of the collars I66; the lever is provided with a plunger I80 having a tapered end I82 which is pressed into acorresponding notch I84 inthe'pin I62, on which thelever is pivoted, by a compression spring I86 (Fig. 7). Movement of the lever I60 in either direction, as viewed in Figs. 6 and 7, forces the tapered end I82 partially out of the notch I84. However immediately 'upon disengagement of the collar I66 causing the lever I60 to turn, the

tapered end I82 is forced to reseat itself in the notch I84 thereby returning the lever to the position of Fig. 6.

When it isdesired to manually turn the spindle 24, handle I48 is shifted to the left from the position in which it is shown in Fig. 11 to put pin I54 in the left hand aperture I58 and thereby to disable both pawls I08 and H8. "Thereupon, after manually engaging clutch teeth on the handle. I41 with corresponding teeth '(not shown) in a, sprocket 204 also pivoted on'shaft I49, rotation of the handle I41 turns the sprocket which in turn drives a sprocket chain 206 shown in Chain 206 drives matically inFig. l, asfixed to the spindle 24 to turnthe spindle. When the handle I41 isreleased, a.:spring (not shown) disengages the clutch teeth'in the handle from the teeth on the sprocket 204 so that movement of the spindle] 24 by pawl: I08 or pawl II8 will idly turn the chain without turning the handle. 24 also carriesa notched disk 209 which is en- The spindle pawl an impulse from said cam means shall be.

gaged by a detent 2I0 (Fig. 8) to maintain the spindle in the positions to which it is turned by the pawls I08 and H8.

The operation of theapparatus shown in the drawingv will be obvious to those skilled in the art from the foregoing description but will be summarized for purposes of convenience as follows: V I 7 v When the spindle such as the one shown at 24 is to be turned in the clockwise direction as viewed in'Fig. 1, the pattern chain is operated so I60 being in theirinactive positions as shown in Figs. 5 and 6, to-operate the train of. mechanism A which includesthe vertical. link 88. .and :the.

pin 94.: Operation1i offthe mechanism ,Acauses pawl I08 Itorack spindles. 24 :the, clockwise: di-

rection as viewed in Figs. 1, Band 10, while pawl H8 is lifted from its ratchet'by' cam portio'n I28 acting on lug I30 of pawl II8 due to the pivotal connection between pin 94 and the support I26. of cam portion I28 through link 96. Due to the fact that link 96 is rigid, cani portion I28 is moved by pin 94 through the action of spring 50 first to disable pawl H8 and then to positively release it through the action of cam 22 to stop the spindle 24 in the proper position; 7

Similarly, when the lever 64 is turned by th pattern means 40 the plate I8 on lever 64 also moves lever 34 from under lever 30. Thereby,

not only is follower lever 30 released so that-its follower 28 follows the contourlof cam 22 but also shaft I2 is turned to turnarm 14 (Fig. 5) to shift link 58 and to thereby swing- levers 52 and 54 clockwise as viewed in Fig. 5 to latch lever 44 and its train A and to release lever 45' and its train B. The rotation of cam 22 therefore permits lever 45 to move up in response to its spring 50 and to be moved down again by the cam 22 to thereby reciprocate the pin 95. Link I00 thereupon draws pawl IIB clockwise about spindle 24 to cause the pawl to drop in behind another tooth and link I02 draws cam portion I38 counterclockwise about spindle 24 to cause the cam portion to act on lug I40 to lift pawl I08. When the floating pin thereupon reverses its direction of movement, the pawl I I8 acts on its ratchet I20 to turn the spindle 24 counterclock- Wise as viewed in Fig. 1-2. The link I02 being rigid, the movement of cam portion I38 is reversed at the same timeas that of pawl II8 so that pawl I08 is dropped down onto its ratchet I I0 in time to stop the ratchet and spindle at the proper point.

Of course, theimprovements specifically shown and described by which I obtain the referred to results, can be changed and modified in various ways without departing from the invention herein disclosed and hereinafter claimed.

What I claim is:

1;; In a full-fashioned knitting machine, the,

combination of a racking means for a spindle comprising a pair of oppositely directed ratchet wheels and pawls, therefor, a cam means and connections for transmitting impulses'from said cam means to said pawls including two trains of mechanism, "one connected to each pawl and a discriminating means for determining-to which delivered and having two bluffs: both out of contact with any pawl when inactive and one blufi operated by one of said trains torprevent one pawl from operating while the one train op-- erates the other pawl to rack its ratchet and the other bluff operated by the other trainto prevent the other pawl from operating while the other train operates said one pawlto rack its ratchet, and'means positively connecting said 7 trains to the bluffs to draw them out of contact with the pawls afterarackingoperations.

2. In a full-fashioned knitting machine, the combination of a racking -means for a spindle comprising a pair of-oppositely directed ratchet wheels and pawls therefcr, a cam means and connections for transmitting impulses from said cam means to said pawls includingtwo trains of mechanism, one connected to each pawl, adiscriminating means for determining ;to which pawl an impulse from said cam means shall be deliveredandhaving two-bluffs both out of contact with any pawl when inactive and one-bluff operated by one 'of said trains to ypreventone pawl from operating while, the one train operates the otherpawl to, rack its, ratchet, and the other blufi operated, by the other trainto' prevent the 1 d nt tr ins ea on .ccnne t other pawl from operating while the other train operates said .one'pawl to, rack its ratchet, said trains being inelasticallyconnected to the blufis to draw them out of contactwith, the pawls after I racking operations, a second discriminatin means set to normallycause one, of. the trains to actuate a pawlito rack its ratchetandto, keep the other pawl from acting, ,a pattern means.

and connections between, the pattern and sec-- ond discriminatingmeans,adapted. to shift, the 7, second discriminating ;,means, to cause the other bluff and-actuatin pawlto becomeactive.

a. In a tall-fashioned: knitting machine, the}, c0mbination, or aracking; means, for a" spindle j comprising} a, pair ofoppositely. directed ratchet wheels andpawls therefor, a cam means andv connectionsfor transmitting impulses from, said cam means. to said pawls including two trainsgot mechanismone. connected to each pawl, a dis? initiation of said,spring actuatedmovement,

ina imp s s to said ,-r t n ssqqmnri inegtno 1, it 3W1 fo o e of d,rat hets.andwieachztra', .avlneza; spr g ua d r actinemove entand an iwa actuated forward .morem nhe d scri i mech n sm co nrisinedatchinaleve sada t hold, each a el mentjnf ne -trainsdurinst spring c dmovement.ag eonn cted nd ar: ranged to hold theirelemen alternately-against nt;du inarsaide nnn t c r m nts n p t rnm ans adaptedt contrq ithe combinat on with a spindle;.ht J TiIt,-v erersely arranged ratchets fixed thereon and pawls forsaid, ratchets pivotallly mounted ongthe spindlego mechanism adapted; to; transmit T ,operatingf 1m p ses t said p w s. comprisinga discriminatin c. m s inc ud g blu fs onerior ;each pa.wl.ztwo

criminating meansfor determiningto whichpawl an impulse from-said .cam meansshall be delivered and having. two;blufis both. out of contact; with any pawl wheninactive. and one bluff operated by one of said'trains. to preventonepawl from operating while the one ,train operates the different trains eachgon'e con ected for. racking a one of said ratchets-and earn-and:iollowermeans,g adapted to deliver."operating-impulses tozsaid.

mechanism, said trains includingceach. alpivoted L other pawlto rack its ratchet and the other bluff,

operated by the othertrain' to prevent the other pawlfrom operating whileitheotherl train opera 5 atessaid one pawl toracklits ratchet,,.said trains being inelasticallyconnected to the binds to draw,

7 member andthe link, a .-ldel1=crank,,lever also piv oted to said link, apivotmeans .mov'edtol-and-fro.

them out of contact with the pawlsafterlracking i operations, a. second discriminating means, set to normally cause. one of the. trains to actuate a pawl to rack its ratchet and to keep the other pawl from acting, a, pattern means, connections m m r anda link, pivoted to 'said.;-member,ia,., sp asi g said membertolswingupward and connected thereto on, thesame side ,ofsthe ,pivot, 0f h m r s the lCOIm QtiQILibEtWBBD. the

by said bell-crank lever, links pivoted;lto the;to-',., and-fro pivot means and. pivot'ed,.injt1irn,,.one indirectly to a pawl and -,one,.dire.ctly ,to a;blufl 1 member, for the other pawl, a pattern ,means, ;a 1 l pattern controlledzmeansnormally holding the between the pattern and second'discriminating means adaptedrto, shift the second discriminating means to cause the other bluff and actuating pawl, to become active, the two trains of mechanism comprising each a member adapted and arranged to move up and down to deliver an operatingv impulse. to one or the other ofthe pair of racking means and the second discriminating means com .7

prising a pair of levers. one of which normally follower part of said camand-,folloyvermean's, in; the position to .whichit, is moved Joy-the high point, of the cam part,of;suchlmeans. and.actuatedlbyr I the pattern meansto permit the follower.partpf v 1 such meansto follow the contour of the cam; and, a second discriminating means comprising pivoted- .5 levers adaptedeach toengage one of said train members, a pattern controlled means normally holding said levers; in positions in'fwhich bne engages oneof said pivotedv train members with:

retains one of said; train imembers against 'upward movement, and pattern-controlled means for swinging one of said levers to release saidtrain member and to swingthe other of. said pair-r of levers to-causeit-toretain the other member: s

4. In a-full-fashioned knitting machine, "the combination with-a spindlareversely arranged I ratchets fixed to said spindle, a pairof pawls. for I actuating said spindle pivotally-mounted tliereon, bluffs for said pawls also pivotally mounted on a link pivotally andinelast'ically connecting said lever with the mounting of one of said-pawls for operatingit, a second link pivotally and enela'sti cally connectingsaid leveriwith a bluff adapted to act on the other of said pawls to hold it away from its ratchet, a second lever 'rc'ciprocated at desired times at which said first lever is stati'on' ary, a link pivotally and inelasticallyconnecting I said second lever with the mounting of said other a I pawl to actuate it, and a link 'pivotally and inelastically connecting said second lever with' a second bluff adapted to act on said one pawl to hold it away from its ratchet.

5. In a full-fashioned'knitting; machine, the combination with a spindle having reverselyiar' ranged ratchets fixed theretoand pawlsfor the ratchets, of mechanismadapted to transmit oper normally so. that oneof the levers engagespne ot ing anup niovementiwhil tthe other-trainmem members, said pattern means at 'tirrie'streleasing saidcam=andefollower means to cause it .to .initiate a. racking impulse to turn: Isaid spindleand I lower means andoperating said levers oflth'e' disv member normallylheldbyi one ioiltheleversandi the spindle,- alever reciprocated at desired times,

- a racking impulse-:1:

, opposite direction F Y out affecting the :other: pivoted train membera i. whilethe other lever-of the discriminatingme'anssis free of contact with either of the pivoted train at other times -both releasing the ca'm-andefol.

criminating means to release the pivo'ted train to hold the other pivoted"traln-rnembr to-icause -1 7. In aknitting machine, the combination of two trains of rmechanism for d pu s Emma can comprising ea'c A down movement at; v

otedlevers connected toswing in unison and h saidtrain members. so as' 13.0., preve teit ro.m ma

her jg; ebgltheijlevers, and-,pfatternwperated means for swinging said levers to reverse the relationship of the levers and members.

8. In a full-fashioned knitting machine, the combination of a cam, a pivoted lever oscillated by said cam on which a follower for said cam is pivoted, two trains of mechanism adapted to receive and transmit impulses from said lever and each including a lever member mounted to move in a plane parallel to the plane of movement of said lever, contact connections between said follower lever and said lever members arranged to transmit an operating impulse to either of said lever members in one direction as the cam fol-' lower moves from a low point of the cam to a high one, spring means biasing said lever members in the direction against said contact connections, and discriminating means including latch levers connected to move in unison and adapted to act one at a time on one or the other of said lever members to hold one member from responding to its spring bias.

9. In a full-fashioned knitting machine, the combination of a cam, a pivoted lever oscillated by said cam, a follower for said cam pivoted on said lever, two trains of mechanism adapted to receive and transmit impulses from said lever and each including a lever member mounted to move in a plane parallel to the plane of movement of said lever, contact connections between said follower lever and said lever members arranged to transmit an operating impulse to either of said lever members in one direction as the cam follower moves from a low point of the cam to a high one, spring means biasing said lever members in the direction against the contact connections, discriminating means including latch levers connected to move in unison and adapted to act one at a time on one or the other of said lever members to hold one member from responding to its spring bias, and means for shifting the latch levers to cause them to determine which lever member is to respond to an operation of said follower lever.

10. In a full-fashioned knitting machine, the combination of a cam, a pivoted lever oscillated by said cam on which a follower for said cam is pivoted, two trains of mechanism adapted to receive and transmit impulses from said lever and each including a lever member mounted tomove in a plane parallel to the plane of movement of said lever, contact connections between said follower lever and said lever members arranged to transmit an operating impulse to either of said lever members in one direction as the cam follower moves from alow point of the cam to a high one, spring means biasing said lever members in the direction against said contact connections, discriminating meansincluding latch levers connected to move in unison and adapted to act one at a time on one or the other of said lever members to hold one member from responding to its spring bias, a lever arranged to normally hold moved by the cam, and a pattern means for moving said holding lever to release the follower lever to follow the cam contour.

11. In a knitting machine, the combination of two trains of mechanism for delivering oppositely directed racking impulses from a cam means to a spindle and intended to operate only one at a time, said trains extending generally vertically, bluifs connected one to each said trains at their upper ends and adapted when one train operates to prevent the other train from interfering with the movement of the spindle, each train having the follower lever in the position to which it is v at its lower end a pivoted member having an upand-down movement when its train is operated, and a discriminating means comprising a pair of levers pivoted to swing in a plane transverse to the planes of said up-and-down moving pivoted members and effective only one at a time but each adapted when in effective position to contact one of said up-and-down moving levers to hold it stationary while the other up-and-down moving lever and its train is free to move to transmit a racking impulse to said spindle.

12. 'In a knitting machine, the combination of two trains of mechanism for delivering oppositely directed racking impulses from a cam means to a spindle and intended to operate only one at a time, said trains extending generally vertically, bluffs connected one to each said trains at their upper ends and adapted when one train operates to prevent the other train from interfering with the movement of the spindle, each train having at its lower end a pivoted member having an upand-down movement when its train is operated, a discriminating means comprising a pair of levers pivoted to swing in a plane transverse to the planes of said up-and-down moving pivoted members and effective only one at a time but each adapted when in effective position to contact one of said up-and-down moving levers to hold it stationary while the other up-and-down moving lever and its train is free to move to transmit a racking impulse to said spindle, and a pattern actuated means for shifting said levers of the discriminating means.

13. In a knitting machine, the combination with a cam shaft, a cam thereon, a cam follower for said cam, a pivoted lever on which said follower is pivotally mounted, said lever extending on the other side of its pivot from said follower and having two contacts thereon on said extension, a pair of trains of mechanism each including a lever member pivoted coaxially with said follower lever, springs on said lever members adapted and arranged to force them against said contacts and said follower against said cam, each of said trains having connections for delivering an impulse from said cam.

14. In a full-fashioned knitting machine, the combination of a racking means for a spindle comprising a pair of oppositely directed ratchet wheels and pawls therefor, both said pawls being engaged with teeth of their ratchets to hold their ratchets when the spindle is to be stationary, and means for determining which pawl is to be effective when the spindle is to be moved, said last named means having two inelastic links and bluffs pivotally connected to said links and rotatably mounted with respect to the spindle, both said bluffs being ineffective with respect to the pawls when the spindle is to be stationary but one of said links moving a bluff to disable one pawl at the time the other is to rack the spindle.

HENRY CVPINGEL.

REFERENCES CITED The following references are of record in the 'file of this patent:

UNITED STATES PATENTS

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