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Publication numberUS2762213 A
Publication typeGrant
Publication date11 Sep 1956
Filing date18 Feb 1953
Priority date4 Sep 1952
Also published asDE1006573B, DE1089914B
Publication numberUS 2762213 A, US 2762213A, US-A-2762213, US2762213 A, US2762213A
InventorsSchurich Herbert
Original AssigneeKarl Steinhof
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hand knitting appliance
US 2762213 A
Images(5)
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Description  (OCR text may contain errors)

P 1, 1956 H. SCHURICH HAND KNITTING APPLIANCE 5 Sheeis-Sheet 1 Filed Feb. 18, 1953 Sept. 11, 1956 H. SCHURICH HAND KNITTING APPLIANCE 5 Sheets-Sheet 2 Filed Feb. 18, 1955 p 1956 H. SCHURICH HAND KNITTING APPLIANCE 5 Sheets-Sheet 4 Filed Feb. 18, 1953 p 1956 H. SCHURICH HAND KNITTING APPLIANCE 5 Sheets-Sheet Filed Feb. 18, 1955 w W U U L United States PatentO HAND KNI'I'IING APPLIANCE Herbert Schurich, Berlin, Germany, assignor to Karl Steinhof, trading as the firm Karl Steinhof Feinmechanik und Vorrichtungsbau, Berlin, Germany For the production of looped fabric on a hand knitting appliance it has already been proposed to cause the latch needles which are arranged in a needle bed to perform in connection with reciprocal motions of a lock out of a thread inserting position, efiected by hand, each time a withdrawal motion behind the full play line of the knocking over bits and thereupon an oppositely directed ejection motion extending beyond the thread inserting position, for enabling the freshly formed loops to slide backwards over the free ends of the opened latches.

It was further proposed to impart to the needles an additional rearward or withdrawal movement directed inwardly of the needle bed to such an extent that the open latches at the free ends of the needles would be retracted into the needle guide grooves, i. e., behind the play line of the knocking over bits which are constituted by the front edges of abutments provided on the needle bed intermediate the needle guide grooves. In accord ance with this proposal, after the end of each .lock motion transversely across the needle bed and longitudinally of the row of needles and prior to the start of the next lock motion in the opposite direction, the thread is placed by hand and under tension over the shafts of the needles from above the latter and close to the needle hooks provided at the ends of the needles. Thereafter, the lock is guided over the entire needle bed and thus a row of loops is formed.

In order to enable this to be carried out, there are provided on the lock a central wing cam, on each side of the latter a disengageable needle lifter, above each of these an auxiliary wing cam and at the place of transition between each needle lifter and the appropriate auxiliary wing cam a pawl with inclined surfaces, such that, with the needle lifter in the operative position, the needle heels will in successive lock motions alternately slide over one of the pawls, the needles being pushed out of the needle bed, and pass through below the other pawl, raising the latter pawl.

It has hitherto been necessary to employ a tensionapplying comb consisting of a weight-loaded bar provided with a plurality of hooks arranged in a row.

This straight hand knitting apparatus has the disadvantage, however, that the tension-applying comb with its attachable weight not only constitutes a part of the whole appliance, which has to be separately stored, may be easily mislaid and is thus frequently not available in case of need, but also makes manipulation more diflicult during the knitting operation, as it hangs down in the way from the knitted fabric which is being formed. 7

The invention consists more particularly in that in place of the tension-applying comb there are, provided at the same places in the needle bed so-called sinkers which are so arranged as to be movable in slots of the needle bed and are offset in a step-like fashion at the forward edge (knocking over edge) in such a manner that the lower step part is bent backward or recedes, so that, during upward and downward movement of the sinker the formed loops are forced downwards by said lower step part. a V

Thus, by these sinkers not only is the function of the knocking over bits, namely the knocking over of the course of loops, fulfilled, but in addition the function of the tension-applying comb, namely the downward movement of the just formed course of loops. s In order to adapt the lock to the particular features of the novel loop formation, it is of advantage to provide at the flat point of the wing cam a pointed part extending beyond it, which gives the needles an additional backward pulling motion.

As the needles, in so far as they are not caught by the parts of the lock, are supported so as to be freely movable, it may easily occur in the case of inexpert handling of the straight hand knitting appliance that individual needles may be 'in any intermediate position and block the lock. In order to avoid this disadvantage, according to the invention the outwardly facing edges of both needle lifters may be provided with inclined surfaces, against which the heels of needles lying in an incorrect position will strike and, sliding during the further movement of the lock along these inclined surfaces, be thrown upwards of downwards, so that the free motion of the lock will not be hindered. At the same time it is of advantage to let these inclined surfaces which act as a deflecting edge taper to a point, in order that in every position a deflection of the heels is possible, 7 j In specially unfavorable cases it may occur, that the point of the particular needle lifter will strike against the heel and thus not deflect the needle. If in such a case an attempt benevertheless made to move the clock in the particular direction, damage to the needle and the needle bed may result, a

In order to avoid this disadvantage, according to the invention, there is provided in each case at one of the outwardly directed edges of each needle lifter a deflecting element which consists of a movable construction element having an inclined deflecting edge and the function of which is, that the heel either, lifting the deflecting element, passes through under it and thus arrives at one side of the outer needle lifter point, or, sliding along the inclined surface of this deflecting element, is guided to the other side of the needle lifter point. In this way provision is made, that the heel will never in the most unfavorable positions, come against the outer point of the needle lifter but will each time take up a position to the right or left of this point.

'In a special modification of the idea underlying the invention the deflecting element consists of a sheet metal strip which is flat and disposed parallel to the longitudinal direction of the needle litter and the outwardly projecting edge of which is bent over at an inclination and angle downwards in such a maner that an outer inclined deflecting surfaceis formed, the forward edge of which is also directed at an inclination downwards and towards the point of the needle lifter. This sheet metal deflector may according to one constructional form be connected at the inner end by a hinge with the needle lifter, so that, on a needle heel striking owing to the motion of the lock, the heel. will according to the momentary position strike against the outer angled inclined surface and slide along ,it, resultingin the heel being deflected above the outer fixed arrangement is alsopossible at :..Fig'ure,l3 is a similar. section thr in thedirection of the arrow Vbfv Figure 16;.

heelwill' withcertaiiityb'e preventedf'rorfi strikingagaimt the outer point of the needle lifter, whereby the lock u slhe b o ked:

diseases the hinge-like itaiih iitef the ziii 7 V I therinner end by onwelding to the needle lifter. For thislalr'ang' tli' deflector willihaveito be.rnade' of'sufiieientlyth' his nenb esneetmatehn, o that, on. th'efne'edleheel} iii: pinging'on the inclined-surfaces, eithera lateralslidin'g" off the. angularlybent ove'riinclined surface or, a slipping below ,the forward inclined edge through a' slight upward springing .of .the ,defl'ecteri will .takeiplzic Eufthfendetails (if the'inventionsh '11 nffwl b'eldes cn a; with" refereriee to constructional examples illustrated in the accompanying drawings,inwhich; .t v """rj' l shf. s .a pierspectife iewof the forward edge of the heedlekbed with-the knocking over bits according to zaii olgiei su'ggestilon'; 1 5 Figure.) "shows diagrammatic. and also perspective representation a front view of the row of-needl estwith severallformedrowsofloops and hooked-on stripping eomEaccor'dingto the olde'r propos'al;

glues show'n'in' diagra atm and perspective rep"- e s'entation a front ,view of the needle bed according" to the invention with the upwardly and downwardly moved sinker's;

figure llis a c'ross sectionthrough the ndi be and me eck;

.Figure'. 5. shows front view of the appliance n igine' inwhieh only the position or the s'inkers and the cam piece is shown;

.FigQIC Saisaperspective view of a detail er the appli aficesnewsi mgurem a nnigii e 6tshow s a partial, ide'view of a sinkerjandlth'e aw's; part-6f a cam piee, the lower ipafrt'o f whichis not curyedjin, a c irclilar are, but is' made straight-,1 I

' :as' suspended'in the" needle heads by means of the upper most row of loops and held by the sinkers in the various stages of a separating operation. In the appliance of Fig. 1 forward edge 60 of theneedlebedknocking over bits 61, between which the needles 62 move. From this Figure 1 it will be seen how thefirs t course 63. hangs to the leftover the. two needles 62 .6221 The figure also shows howQthe sehondcourse; is fornied byrneans Vof tl'ie piece 7 of thread 64. The two;nc.edles 65,-;66 lying to theright are retracted and it is shownhow the'loop formation of the secon d course is produced through the thread placing itself not only round the hooks of the needles, .b -ltfaIS O round the forward edge 6] of the knocking over bits.

In this mode of producing the'kni tted fabric it is necessary to load or tension the fabric 70 (Figure 2,) with arw ghtfl i-r. I /ord th t; this We g tm y d str ut upper lc'pop s'6.8 of the last course but one. .This is shown V parfula' 'rly elearly in Figure l. The needles 65,66

Figure 7 shows a partial v1ew rr'om below bf .which rnainlythelower part of the wing lcani is sli'oiiv'n;

--Figu're. .8 vshows; a diagrarnrnatic view from ab forward .partof the ,n'eedl'ebedtwith the Ii K h 1 enser. the needles and thesink'ers in diagrammatic p sen mk i i i regs shows a view has below are con Example of a needle lifter with a riveted-on deflecting eleiient'"- r .1: 0 i vl ai t e a w f th r m r -F u 9 51 8 in the i i l. Bl witha ia'rtial view Tof 'anee'dleina piosition fin which the deflecting elerh'ent is raised by the heedleheel i V,

EigureJl ,fshows a similar 'v'iew, be; with ester "asses of the needle heel with respect to" the 'd'efle ing element invwhichthe needle. heel is deflected at meterwardinclinedsurface toitherightj a l-2 is ,an;elevation of a needle lifter in section along line XIL-XlI of Figure 9; v

with ahinged-CnQdeflecting element;

Figure -14 shows a view from below of the lock iewed Figure 15 shows a 'view from above ofrthe lock in theldirection of the arrow U ofFigure 16 in which for ugh needle lifter the sake of clearness parts of the handle areomitted, and

the adju sting disc is in section along line XV+XV of j l r 3.1;. 1

. Figure .16.is an elevation and partial longitudinal section on line of Figure 1 V i V {V Figure 17, shows a side View 'of thelock seen in the Ldir'ectionofthe arrow W. of Figure 15; :7 g in: W Ei'gur e 18 is aperspective representationof the double deflector for the needle heels; e r e A Figu re l9 showsa view from above of;th e'adjusting seen indie direction of the arrow U in Figure 116,

in which 'view the cover discis shown aspartly broken away; and 7 Figures 20 to are views'of the. knitted fabric shown Wendie. ,th l ri q ga q fi u t s ke n th se pp loop parts 68,1if the last course but one, 63, and w ith it these' upper loop parts 68 itogether with the forward loop parts' 69 Oilh lastfo nied course were not I drawn w ads F t, 'In"con trad1s tinct:ion tothe aforesaid: construction the ghtwith the setup conlb is entirely ayoided according to eyesig t invention. erns purpose, in accorda e ith. the' invention,' the knocking over 'bits'fil are rleplahediasi shown ii rignies, by sinkers i)" which take ofknockover bits and are arranged for. movement on the needle bed, where in the constructional forn ht herto usual the knock over bits are disposed. The

difi consists substantially in that, thesesinkers are 'jnot stattonary likegth'e knockover bits 61, but'are arren g ediso as th; swing a corresponding slot guides in needle bed. in addition there are provided on the lgnoch loverfed'ges sl, 83 of these sinkers claws 8 1 in the forth of downwardly dirj'ected pointed hooks which divide the knock over ages of the sinkers' into an upper knock over edge fiortioh S'Z and a lower Knock over edge portioii 83'6fis'et fronftheupper portion. I I i o the loop forrnation and the setting up is perforrned by means of the arrangement provided with such 'siiilifs' so willbe s'e'enb'y referr ng to "Figure 3 showing 7 the workin'g' p pie; According to the present invention the forniing of the loops takes place during the sack aramovefiieii of thenee'dles; 62, through 'th'e' thread first laying 'i'tsel'f rounfd the upper edges 82 of the sinkers 80. 1a the tio'n's z "tob th'e formingof the loops is exactly th sanie as with the known arrangements with knocking r bits as s'hownin Figure *1. The difference fir'stl'oc in theposit'iond, where the respective sinker *is swung tipwar'dsg-until the claw or hook 81 hasler't the last formed loopi 8 f (-pos'ition f). Between this loop 34- a-nd the lowenl-inockingover edge '83 a free 'space'will 'thus fha e .been formed.-- This sp'aee is closed, as the 'forwardfpart 84i of-thel1oopiisdrawn towards the lower knockingiofvenedge :83; through .therhook T85 of the needle being;,drawnbackiStill further. by the distance 86. How

:tliisltakesplace willf'be described in detail below, when dealing with,the lockgsIn the position g the sinker will again have:moyed; slightly downwards, while the needle will at the same time assume the position 86'. The claw there are arranged at the ,the downwardly exerted pull of the weight.

81 of the sinker has in the position, g just hooked itself overthe forward part 84 of the formed loop and. during its continued downward movement as far as the position 1', moves the last formed loop downwards beyond the forward edge 60 of the needle bed. The same result is thereby obtained as was hitherto brought about by the weight, that is to say the last course but one of the knitted fabric is not drawn downwards as in the known arrangements, but rather forced downwards, so that the parts 87 of the last formed loops are drawn tightly over the needle shanks, whereby on the needles being thrust further forward, into the position 86", the latches of the needles will be thrown backwards with certainty through the loops sliding over them. 7

It will thus be seen that the claws 81 in this constructional form perform the function of the above mentioned set up comb with its hooks and the tensioning weight, namely, that they move the knitted fabric downwards.

The employment of the sinkers in place of the set up comb with its Weight has on the one hand the advantage that the whole appliance becomes much more easy to handle. There are no parts to be stored and manipulated separate from the appliance, such as the set up comb with its weight. The sinkers replacing the set up comb in its function are on the contrary fixed to the appliance. Moreover, they do not, like the set up comb with its weights, constitute a bulky downwardly projected part, but take up hardly more space than the hitherto usual knocking over bits between the needles in the needle bed. The appliance also need not be fixed to a straight table edge or the like. It is possible to work with the appliance in any position and even to place it on the lap. In this the appliance differs still more from a knitting machine and assumes a still more pronounced character of a hand knitting appliance.

A further still more important advantage of this improvement consists in that the knitted fabric is given during the knitting the form it will later retain, as no weights whatever are employed, which would tend to stretch the fabric and therefore pull it out of shape. Hitherto, in order to produce articles of clothing to correctmeasurements, it was necessary to make a knitted sample, so as to obtain a picture of the true dimension, to count up the number of courses of this knitted sample, and then, While knitting, make sure by renewed counting that the knitted fabric will be given the same number of courses. According to the new proposal this counting is no longer necessary, as no distortion takes place. All that is required is to check during knitting the required measurements with a rule.

Furthermore, it is not absolutely necessary to make the needle lifters capable of being put out of operation. According to what has so far been said, first of all a course was formed through the thread being laid by means of the retreating needle hooks round the knocking over bits of the needle bed and the comb hooks of the tensioning comb. For this reason it was necessary first of all to put the needle lifters out of operation and, after the formation of the first course of loops, to put them into operation again one after the other during the next following lock movements. According to the present invention the needle lifters may be rigidly fixed to the lock as the function of the tensioning comb is here taken over from the start by the movable sinkers, so that during the first lock movements the first course of loops is completely formed.

Finally there is the further advantage that, even when not using first quality yarn, the fabric will show high regularity and evenness of the loops. This may be accounted for by the circumstance that following the complete first loop formation the tightening of thread takes place through a short backward movement of the needle, as was described in phase f in Figure 3. Through this 6 tightening small irregularities of the tension of the thread will be corrected.

Figure 4 shows a side view of one of the sinkers and a cross-section through the needle bed and the lock guiding arrangement. The sinker has in the rear portion a notch which is open at the bottom and acts as a pivotal support. With this notch 90 the sinker engages over a wire 91 which is supported in the longitudinal direction of the needle bed and acts as the pivotal point for the sinker. Towards the rear the sinker 80 is provided with a guiding part 92. Into engagement with this guiding part can be brought a cam piece 93 (see also Figure 5a) which is fixed to the lock plate 94.

The lower actually effective part 95 ofthe cam piece has a curvature constituting a portion of a circular are traced substantially with a radius 114 about the pivotal point 91 as centre. Through this arrangement it becomes possible, that in all positions of the sinker there will be linear contact from the point 111 to the point 112 (Figure 4) and not only point contact 113 (Figure 6) between the sinker and the cam piece, which would be the case, if as in Figure 6 the cam piece in its lower part 121 were not curved to a circular arc, but were made straight. If linear contact were sought in this case as well, the contact surface at the cam piece would have to be shaped as a complicated undulating surface, which would present technical difiiculties of manufacture. Linear contact is important, however, so as to avoid overloading and consequent rapid wear.

For moving the sinker each time back into the normal position and giving it the necessary pressure for tensioning the loops, each sinker is connected by way of a tie-rod 96 with a compression spring 97. For simplifying the assemblage of the parts, the tie-rod engages with a circular widening 98 in a corresponding recess in the under side of the sinker.

The front edge 82 of the sinker 80 is so curved and so displaced upwards relatively to the centre of gravity 91 (Figure 4), that, on being rocked out of the bottom position (full lines) into the upper position (dotted lines), the edge 82 will in the middle part recede by about the amount 100. This has the advantage of a decrease in tension of the loops during the upward swing of the sinker.

A further decrease in tension is produced through the needles which after being drawn into their momentarily lowest position, are slightly loosened.

This is brought about by the needle sinker or actuator 101 (Figure 7) having two slightly inclined surfaces 102, 103. On following the process of loop formation in Flgure 8 from right to left, it will be seen, that from the position i to k the needles slide somewhat forwards in the direction of the arrow A, so that the loop in the position 104 loosens. In the position k the thread has moved under the claw 81 of the sinker. By the triangular projection 105 on the needle sinker the needle is drawn back sharply (position 1, Figure 8), so that the thread is drawn close to the lower edge 83 of the sinker (cf. also position f of Figure 3). In itself the needle s nker 101 might from there onward follow a straight line, as indicated by the dotted line 106, but this is inadmissible for the reason, that, during the motion of the lock in the opposite direction, the needle has to perform the same motions as on the right-hand side of the sinker. For this reason the needle sinker is made symmetrical, that is it also has inclined edges 103, 103' to the left. Starting from the position I to the position n the needles do not move along the dotted line 106, but follow the upper edge 103, 103 of the needle sinker, which is due to the circumstance, that the thread tension draws the needles against this edgein the direction of the arrow A. This tension is imparted to the thread by way of the preceding loops by the downwardly moving sinkers.

To sum up it can be stated that the triangular projection 105 in the middle of the upper edge of the needle right angle.

has object of drawin g the front; part of the 7 loop ,closely'againsh the lower edge of the sinker, in order theright-hand needle lifter 34- is provided with the two outer inclined flanks 120, 121, which terminate in a point 122.- When-the'needle heels'areinthepositions 123 above thepoint'l'llgr 124 below the point 122, they will during movement of: the lock in the direction of the arrow D, strike against the outer inclined surfaces 120 or 121 and can be deflected by them upwards or downwards.

Onlyjn' some few particularly unfavorable positions will the needle heels 'strike against the point 122,,as indil cated' by the position 125, In this position they cannot slide off so; thatthereis the danger of damage. In order toeliminatethese unfavorable cases, there 18 riveted to the needle lifter the deflecting member 126 by the rivets 1 2 7 and 32. Since as. a rule there are pro vided on the needle lifter an actuating pin'32for displacing the needle lifter and twoguiding pins 127, 128, the pin 127 and the actuating pin 32 may serve the purpose of fixing rivets for the deflecting element 126. For the guiding pin 128 a corresponding recess is provided. The forward edge 130 of the deflecting element 126 is bent away at a right angle and extends above the inclined surface 120. In addition, this right angled bend is placed at an inclination in such a manner as to run about parallel to the inclined edge 120 of the needle lifter. Whilst the lower edge 131 (Figure of the right angled bend 130 runs about parallel to the surface of the needle lifter, the forward edge132 (FigurelO) is made so as to run obliquely'frorn top to bottom. The arrangement must be such that the fr'ontpoint 122 of therneedle lifter is screened; by the surface 130 'whichzis bent over at a Should it occur iduring the motion of the lock in the directionof the arrow D that the roundededge of the needle heelshould by chance at the place 135 (Figure 12) strike against the edge 132 of the deflecting element 126, quitev definite forces will be exerted on this edge. In the elevation projection, as shown in Figure 10, the direction of the force 136 *is perpendicular to the forward edge 132 of the deflectingelement. In orderclearly to comprehend the eflect of this'force on'the'de'flecting element, let this force be resolved into the two components 13 7 and 138, of which one, the force 137, runs vertically and the other, the force 138, horizontally. The

vertical force 137 acts in the sense of lifting the deflecting element, whilst the horizontal force 138 is counteracted,

by the resistance forces at the:fixing place, more par ticularly at the rivets 127 and 32. Similar are the force.

relations in side elevation, which is represented by Figure 12. In this figure '139 represents the direction of the force which is exerted by the needle heel 143 at 135 on thefront edge 132 of the deflecting element. This force can also be resolved intotwo further components 140, 141,- of ,whichlthe vertical force 140 acts in the sense of lifting the deflecting element.

In the position shown in Figure 10 this lifting force 137 need only be relatively small, .as the edge 132 has to belifted only by the amount 142, in order'to allow the heel 143 of theineedle to pass through under this edge-until it. strikesagainst the inclined surface 121'and there slides along in the direction of the arrowF.

Should the needle heel 123, however, be in' a position further to the right according to Figure 11, there will still be an upwardlydirectedcomponent 137 of the force. This:component would,however,in the position shown in Figure 11 not be sufficient to :lift the deflecting element through' the considerably greater distance144, which W 4 bj S IXJQPe P t e ne d h t P thrbszwn s thi t e? l; h n edl he w l t e fore move along the forward surface 130 of the deflect purely diagrammatically in Figure, l3 7, V v

According to an older-proposal, the accurate adjust-v relatively great error.

V e 7 eeeeiz'rs possible position. The needle heel will be deflected either to the right or. to the left from the point 122.. V

In the constructional form of'Figure 13.theriveted connection 127 is replaced; by ahinge 146. Inorder V to obtain the efiect of the spring force, namely the limitation of the upward motion of the deflecting element. on

striking the needle heel, there is providedjin this case,

where there is no 1 spring force, a stop 147', as: shown ment of the .loop density takes place after the releaseof .a milled nut by displacing the needle sinker in a slot. 7 For accurate adjustment an: index was provided, which moved along a scale. Accurate adjustment is frequently not obtainable with this arrangement, for the reason that it depends greatly on the carefulnes s of the worker.

Accurate adjustment is of special importance, where in making two. similar knitted articles with the same number of courses it is desired to' obtain the same length and between the knitting of the two parts'the 'loop'densi-ty has been altered. When, rafter finishing one piece, for instance the sleeve, the second sleeve is to be knitted, it is necessary to use the greatest accuracy to ensure the size of loop, when making the second piece, exactly the 7 same. as with the first piece. Otherwise the second piece would be shorter or longer. In such case particularly great accuracy is essential, since even verysmall errors will, owing to the great number of courses, add. up to Thus, diiferences of a fraction of a millimetre in the adjustment of the'need le sinker'may amount in the final result to differences of several. centimetres'in the length of sleeve, as in'the case of the length of a sleeve it is on the average a matter of 200 to 300 courses of loops. i A further disadvantage of the adjusting arrangement according to the older proposal consists in the danger of the clamping screw working loose, so that undesirable changes in the loop density may occur, while knitti'ng'is proceeding, which frequently go entirelyunnotic'ed forarje noticed too late. 1

These disadvantages are avoided according to thepresg 2 cut invention through the adjustment of the necdlesinker being effected by a sliding cam drive of a rotatable disc. For this purpose the guiding piece 54 (Figure 14) of the needle sinker 101 is provided with a pm 107 which on the front side of the lock plate 53 engages in a spiral cam 108 of a rotatable disc 109. As may be seen'from Figure 1 6, the spiral cam there'is constituted by the outer peripheral surface or edge of a recess 109a formed .in that side of the adjusting disc 109 which faces'the lock plate 53. Along the surface of the spiral cam notches or grooves llla'are provided at regular intervals. The pin 107 'of the needle sinker is pressed against the spiral cam through a helical spring laid round the guiding piece 54. This helical spring 115 is disposed at the rear. side of the lock plate in the free space between the lock plateand the needle sinker 101. The hookshaped ends of the helical spring 115 are hooked :into notches 116 in the form of circular segments punched out of a bar 117.

The adjusting disc 109 is supported so as to be capable of rotating about "a pivot pin 1 1 8 fixed-in the centre 'of the lock plate, 53. 7 Upon rotation of the adjusting disc 109 in the direction of the arrow p, the'pin 107,-sliding along the spiral cam 108, will successively enter the separate notches 11141. By this means the needle sinker is moved step by step "inthe direction of the arorw q.. ;1,.l f t m t P s t of heediu ng sc 109 at any time visible from the outside, there are that through the I arranged in a depression 150 on the trout side of the adjusting disc numerals 1 to 10 in a circle so as to correspond in position to the individual notches. This depression is covered to the outside by a cover plate 151 which is fixed to the pin 1 18 by a screw 152 in such a manner that it does not take part in the notation of the adjusting disc 109. At one place in the cover disc is a circular window 153 (Figure 19) in which, on the adjusting disc being turned, the numerals will appear and thereby indicate, in which position the needle sinker 101 happens to be.

Through this adjusting device operating with notches an indication is given'in a positive manner, that always re-occupies exactly the same position, so that the abovedescribed differences in the production of a knitted article, through inaccurate adjustment to a definite width of loop, will no longer occur. A further advantage of the novel adjusting arrangement resides in its convenient manipulation. There is no longer any exact and troublesome adjustment of the needle sinker requiring under certain circumstances the use of a magnifying glass. The needle sinker snaps automatically into the correct notch position each time. Finall any unintentional displacement during knitting is excluded.

In the hitherto usual constructional form the needles could only be rendered inoperative by being pushed downwards, as the auxiliary needle sinkers 43, 44 filled the upper part of the lock plate to such an extent that at this place there was insuflicient room for the needle heels to slide past. In the novel constructional form the individual parts of the lock are placed together more compactly, more particularly the auxiliary needle sinkers have less width, so that between them and the upper edge of the lock plate there is suflicient space for the passage of the needle heels. The needles can thus be put out of operation both by being pushed downwards as well as upwards.

On the other hand, sufficient space can be obtained above the auxiliary needle sinkers for the passage of the needle heels by widening the needle bed and to a corresponding extent the carriage of the lock as well.

For normal knitting it would suflice to put the needles out of operation in the lower position only. The possibility of putting the needles out of operation in the upper position as well has been found to be of importance, when stocking heels are to be knitted with the hand knitting appliance under consideration. For this purpose it is necessary, after finishing the stocking leg, to put the needles lying at both sides of the leg part out of operation by displacing them upwards. This applies to those needles which are not required for forming the stocking heel. Only about half the needles occupied by loops and lying in the middle of the knitted piece are in operation. When knitting with these still operative needles, each time after the completion of a stroke of the lock motion one needle is additionally put out of operation alternately on one side and then on the other. In this way work proceeds until a minimum width is reached, whereupon alternately in the opposite sense on one side and the other the needles are put in operation again, until the same width of knitting is reached as that at the commencement of the starting of the heel. In this way the usual pocket-shaped heel is fiormed. After finishing the heel, all the needles are again put in operation and, by continuing to knit, the foot part of the stocking is commenced.

This putting out of operation of certain needles into the upper position provides the further possibility of producing patterns, through needles in regular succession, for instance each alternate needle, being pushed by hand into the upper inoperative position. In this position individual courses of stitches are then knitted by pushing the lock to and fro. Thereupon, the previously inoperative needles are returned into the middle operative position, the so-called insertion position, and knitting proceeded -10 with in the usual way. .The known cardigan producedin this manner. V

In order to prevent the needles which are in the upper or lower inoperative position and therefore within the range of the lock from getting between the individual lock parts through unintentional displacement, at bar is provided at the lower edge of the needlelifters 33, 34 (Figure 14) and a bar 117 is provided at the upper edge of the needle lifters 4'3, 44, which bars extend from one end of the lock to the other. The needle heels can strike against these bars. They are prevented by these bars from penetrating unintentionally into the separate channels of the lock.

As the needle heels in the constructional form under discussion can be brought both into the upper as well as into the lower inoperative position, there are danger points on each side of the lock in the region of the needle lifters on the one hand and of the auxiliary needle sinkers on the other hand. Even if these needle lifters and needle sinkers should be made wedge-shaped towards both outer sides of the lock, unfavourable cases may occur, where the needle heels strike against the wedge point and would block the look. For this reason the deflecting elements are used, such as were described with reference to the previous constructional example.

For the sake of simplicity these deflecting elements are constructed as double deflecting elements which are fixed in the middle between the two bars 155, 117, each by two screws 161, to the lock plate 53 in such a manner that the two flat parts 162, as shown more particularly in Figure 17, extend obliquely downwards towards the two free ends, so that they can yield flexibly, when the needle heels strike against the inclined edges 167. The surfaces 130 extending perpendicularly to the surface of the lock plate are so arranged with respect to the wedge po nts of the needle lifters or auxiliary needle sinkers that the rear edge 164 of these surfaces 130 practically coincides with these wedge points. There is a variation as compared with the arrangement according to the invention described with reference to Figures 9 to 13 in so far as in that case this surface 130 (cf. Figures 9 and 10) extends backwards beyond the wedge point 122 and proceeds for a certain distance parallel to the upper obliquely rearward-1y extending wedge edge 120.

According to a further idea forming part of the invention, the actuating knobs 3 1, 31a of the needle sinkers are not placed next to the handle of the lock, but within the space surrounded by the handle (see Figure 16). One advantage of this arrangement is that while knitting, the worker will not get caught on these knobs inadvertently with bits of thread of clothing. A further advantage consists in that inwardly extending extensions 171 of the handle may be used for the reception and guiding of the pins 172 and for catch arrangements. Not the least advantage is a pleasing appearance. The provision of the extensions on the handle is also of considerable advantage for the secure fixing of it, by enlarging the bearing surface on the lock plate. This for the first time provides the possibility of making the handle of artificial pressed material, without the danger of breakage.

Round the pins 172 there is a sleeve 173 which is riveted firmly into the lock plate 53. In the middle of the sleeve there is at one place a bore 174, into which a ball 175 is inserted, which is brought by a divided annular spring 176 into one or other of the two annular grooves 177, so as to catch there through pressure of tension being exerted on to the actuating knobs.

The handle 170 is already connected with the lock plate 53 by the sleeves 173. An additional connection is established by the screw 179.

In order to enable the hand knitting appliance to be conveniently transported, it may be of advantage to make the handle capable of being folded down or comstitches are 7 red thread end will be to the right.

lifter is capable of being put out of operation.

V pletely detachable to attach itto the lo ng narrow with flat knitting machines.

Constructions of hand knitting appliances. are known where, even though sinkers are used, itis not necessary to make the needle sinkers capable of being put out of operation. It has been found, however, in practice that the putting out of operation of the needle sinkers may be of the greatest advantage for certain knitting opera- 'tions, this making it possible to undo individual courses.

of stitches, whilst the knitted piece is still in the hand knitting appliance.

Thus, it is necessary for bring the needles .into the tensioning position, that is to say into the position in which the needle heads lie somewhat behind the front sinker edges. The undoing operation is then as follows:

The thread end 190 '(Figure 20) is, by being moved downwards in the. direction of the arrow r,' unhooked from under the hook; of the sinker 191 and thereupon, as shown in Figure 21, moved upwards in the direction of the arrow s, a pnll being exerted at the same time on the thread in the direction of the arrow 1. By this means tolefi. 11,1 th s :way any courses can be knittedjwith anycolors. v I 7 When. starting to knit, care'must be taken that the.

beginning of one thread is fixed at the left side of the appliance and the beginning of the thread of different color at the right side of theappliance. 7

Through the putting out of operation each time of the corresponding needle lifter, the total movement of the a needle is divided into two p'hasest'On one'traverse. 0f

the undoing operation, to

the loops 192, 193 lying below it are drawn upwards and be seen from'Figure; 22,- This produces the state,;as

shown-in Figure 20, with the sole difference, that the undoing process has moved forward to the right by the pitch of one needle. The process of undoing is then repeated in the same manner as already described;

'A further advantage of the disengageable needle sinker consists in that it is possible to knit with several colors, even when the change of color is effected successively in an uneven sequence of numbers. Such a change of color shall now be described in detail: For instance, it is intended to knit alternately one course with white thread and the following with red thread. If thejlock were not to be provided with needle lifters capable of beingput out of operation the following difiiculty would be encountered: e

When knitting for instance with a red thread from left the lock taking place, the needles are brought into the tensioning position, that is to say into the position in which the needle heads lie 'just behind the sinkers, whilst on the return traverse of the. lock the needles will be a thrust out intothe insertion position. Thusfthie com:

plete to and fromotion of each needle, which otherwise takes place during-a single traverse ofthe 106 has it, were'distributed over tWOjtra-versesof the, lock, namely over one forward stroke and one backward stroke;v In

this wayit becomse possible to bring thelock each time to that side of the needle bed where the thread of the desired coloris. 1 f

Various changes and modifications may be made without departing from the spirit and scope of the present" invention and it'is intended that such obvious changes andmodificationsbe embraced by the annexed claims,

7 Having thus described the invention, what is claimed as new anddesired to be secured by Letters Patent, is:-

1.' In a hand-operated knitting appliance having latch needles arranged for reciprocal movement in respective guides of; and transversely to a needle bed, a lock arranged for reciprocal displacement longitudinally of said needle bed, a needle actuator carried, by said lock for imparting tosaidneedles said reciprocal movement upon reciprocal displacement of said lock, and a'plurality of to right, then after the first movement of the lock, the

On moving the lock from right to left, at the same time placing a white thread into the needles, the white thread endwill appear on the left hand side. If the third course from left to right is to be knitted with the red thread,'there will be no red thread'end, as it 'is onthe right-hand'side. It will be seen from this, that it will be necessaryin this stage of the knitting operation to knit from left to right a.

so-called .odd course, that is during the lock motion from left to right not to knit a fresh course of stitches; This is only possible, however, when the right-hand needle The result of this will be that, when knitting the second course, that is during the lock motion fromv right; tojlefnthe needle will remain in the tensiofiing positionCiThe needle 7 response to rotation of said disc means,

sinkers, projecting partly. beyond the forward .edge. of said needle bed and arranged for oscillating'movement parallel to each otherin bottomed guide grooves, provided on said needle bed and intermediate said. needle guides,

respectively; each of said, sinkers comprising a leverwith first and second arms disposed at an obtuse. angle with respect; to one another, each first arm being: provided, at a first location remote from the junction between the same and the corresponding, second arm,'with upperf and along said needle bed and transversely to said sinkers and engaging in said recesses to support said sinkers and toprovide, a common axis of oscillation'for thesame, said front end portions of each of said first arms being curved about said axis of oscillation of its respective sinker, and respective spring means operatively connected to each of said first arms of said sinkers'between saidre'cess and said frontend portions thereof and biasing said first arms, respectively, toward the bottoms of said guidegrooves.

v2. In' a knitting appliance according to claim '1; adjus'tment means operatively connected to a portionof said needle actuator for adjusting the same transversely" to the direction of displacement thereof together with said lock to thereby enable variation of the density of loops formed by said needles, said adjustmentfmeans including: rotatable camv means, and resilient means urging said portion of said needle actuator into contact with-- said cam means, whereby rotation of said cam means effectssaid,adjustmentof said needle actuator.

3; Ina knitting"; appliance according. to claim 2; said.

rotatable cam means including rotatable disc means pro-1 vided with a spirally arranged cam surface, saidcam surface beingprovided with spacednotches, said portion of said needle actuator engaging said cam surface and said adjustment of said needle actuator being efiected in,

4. In a knitting appliance according to claim needle lifters carried by said lock and located, respectively, in the paths of movement of the heels of said needles and each provided with outwardly directed edges and with inclined converging surfaces terminating in a point, whereby said heels of said needles strike successively against a respective one of said inclined surfaces and are deflected by and along the latter during continued displacement of said lock along said needle bed.

5. In a knitting appliance according to claim 3; deflecting means for said needle lifters, respectively, said deflecting means extending longitudinally of respective needle lifters and each being provided with an outwardly extending inclined edge, each inclined edge being bent to extend in transverse direction to its respective needle lifter to shield the point of said needle lifter, whereby damage to said needle bed and to said needles from contact between said points and said heels of said needles, respectively, is prevented.

6. In a knitting appliance according to claim 1; a cam piece mounted on said lock and having a contact surface arranged for sequential engagement with said second arms of said sinkers as said lock is displaced along said needle bed, said contact surface being of circular curvature with the center of curvature located on said axis of oscillation of said sinkers.

7. In a knitting appliance according to claim 1; each of said first arms of said sinkers being provided intermediate said front end portions and said recess with a slot of substantially circular cross-section and having a downwardly facing opening which is narrower than the Widest portion of said slot, a tie-rod having a substantially spherical head at one end engaging in said slot and having a shoulder at its other end, said tie-rod extending through said opening of said slot and through said lock, each of said spring means comprising a compression spring interposed between said lock and a respective one of said shoulders and effecting said biasing of said first arm of the corresponding sinker toward the bottom of its respective guide groove, each slot being open laterally of its respective first arm, whereby each sinker may be disconnected from its tie rod only by being laterally shifted along said wire, disconnection of said sinkers from said tie-rods being otherwise prevented.

References Cited in the file of this patent UNITED STATES PATENTS 523,867 Powell July 31, 1894 2,329,617 Ingatlls Sept. 14, 1943 2,490,607 Wood Dec. 6, 1949

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US523867 *1 Sep 189231 Jul 1894Himself And Edward PowellThe morris peters co
US2329617 *4 Apr 194114 Sep 1943Tompkins Bros CoKnitting machine
US2490607 *20 Feb 19486 Dec 1949Charles D WoodKnitting apparatus
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2877635 *26 May 195517 Mar 1959Ralph C PowellMethod and machine for knitting seamless gloves
US2960854 *21 Mar 195722 Nov 1960Franz EberlKnitting machine
US2972242 *21 Apr 195821 Feb 1961Eberl FranzKnitting machine
US3007325 *15 Aug 19587 Nov 1961Morpul IncStitch regulator
US3019624 *28 May 19586 Feb 1962Sanji HoriMoving needle type hand operated knitting machine
US3024633 *16 Apr 195913 Mar 1962Gerhard KochheimFlat knitting apparatus
US3095717 *31 Oct 19582 Jul 1963Textile Machine WorksCircular knitting machine
US3125871 *9 Jul 196224 Mar 1964 Schur
US3440839 *6 Dec 196729 Apr 1969Paliz AgDouble-bed knitting machine
US5134865 *26 Dec 19904 Aug 1992Shima Seiki Mfg., Ltd.Sinker mechanism for flat knitting machines
US5408849 *2 Dec 199125 Apr 1995Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. KgFlat bed knitting machine
Classifications
U.S. Classification66/106, 66/109
International ClassificationD04B15/06, D04B7/08
Cooperative ClassificationD04B15/06, D04B7/08
European ClassificationD04B15/06, D04B7/08