Патент USA US2127178код для вставки
Aug. 16, 1938. R. H. LAWSON 2,127,178 ' KNITTING MACHINE ' Original Filed Oct. 25, 1933 F101.‘ 3 Sheets-Sheet l FI an"?mums, J1 3»\rJul20,H ,5N \ / a mMT»E///// / / mm WE 3.7 wmm§a.5s4‘W5w§? L7//. / / ./ a\ DM 84 ..N, \‘ v a", . ,.WM . , .. 81 Aug. 16, 1938. 2,127,178 R. H. LAWSON KNITTING MACHINE Original Filed Oct. 25, 1933 FIG. 4‘. ' /// F1115.v 3 Sheets-Sheet 2 F1G.6. Iggy, ///3 \s V/// / r1 4 L. jawNT? T\ w?A by . N , 2 Ry ,YM“ /v B Aug. 16, 1938. I R. H. LAWSON 2,127,178 Y KNITTING MACHINE Original Filed Oct. 25, 1953 i‘ ’ ‘ ‘i s Sheeis-Sheet s ‘a Q A A/VEZYTWR : r .i% X By @307 Fm 1477"")? R0551? TH‘1A wsazv ' g’; Q Patented Aug. 16, 1938 2,127,178 UNITED STATES PATENT OFFICE 2,127,178 KNITTING MACHINE Robert H. Lawson, Pawtucket, R. I., assignor to Hemphill Company, Central Falls, R. I., a cor poration of Massachusetts Application October 25, 1933, Serial No. 695,154 Renewed September 16, 1936 17 Claims. (01. 66-48) This invention relates to knitting machines respective needles as by means of spring bands 5. and processes and particularly to circular knit The jacks 4 are also provided with butts 6 and ting machines of the type disclosed in the patent at their upper ends pass upwardly through a to Hemphill 933,433, September '7, 1909, latch sinker head 1 connected to the needle cylinder needles being, preferably, used and without a so and adapted to rotate therewith if the needle i) called latch ring for holding the needle latches cylinder is rotated with respect to the knitting in an open position. cams. Surmounting the sinker head 1 but pre In the drawings: vented from rotating therewith, is a sinker cap Fig. 1 is a view in section showing a needle par— 8 having cams (not shown) for acting upon butts tially elevated with the last drawn loop holding 9 of sinkers l0. 10 the needle latch in an open position; Ordinarily a so-called latch ring is utilized to Fig. 2 is a similar View but showing the needle maintain the latches l I of the needles in an open in an elevated position where the loop is below position, the last drawn thread loops being posi the needle latch; tioned below the needle latches by elevation of Fig. 3 is also a sectional view showing the the needles 2 preparatory to reciprocatory knit needle in its lowermost, stitch drawing position, ting. By means of the instrumentalities and the old loop or stitch being shown in a position parts cooperating therewith as hereinafter to be to be knocked over the top of the needle hook more speci?cally described, the necessity for a by the adjacent sinker; ' latch ring is obviated, the needles 2 not being Fig. 4 shows the instep raising cam having ele elevated to a latch clearing position preparatory 20 vated a jack to the instep level, the needle to reciprocatory knitting. . remaining in a relatively lowered position in In Fig. 1 the latch H is shown as being held in which the last drawn loop prevents the closing of an open position by means of a bight ll! of the the latch either during reciprocatory knitting or last drawn loop of thread; in Fig. 2 the needle upon the resumption of circular knitting; . Fig. 5 is a View similar to Fig. 4 but showing a pick elevating a short butt jack companion to a heel and toe needle; ‘ Fig. 6 is a view similar to Figs. 3O showing an instep cam in position the long butt jacks and also some butt jacks if they are not lowered manner by picks; 4 and 5 but for lowering of the short in the usual I Fig. 7 is a fragmentary diagrammatic view showing the respective paths of the needle butts and jack butts during normal or circular knitting; Fig. 8 is a fragmentary view showing the inac tive path of the needle’butts during reciproca 40 tory knitting and showing instep and/or other jack butts being elevated to a non-knitting level; is shown as having been elevated to a latch clear ing position, the bight l2 being shown as below the latch H and a strand l3 of the thread being shown as about to be engaged by the hook of the needle; in Fig. 3 the needle is shown in its ex treme lower, stitch drawing position in which position the strand i3 is shown as having been drawn through the bight l2 of the thread, the said bight being in a position to be knocked over the top of the needle by a forward movement to be subsequently imparted to the sinker I0 by a cam acting upon its butt v9. The movements just described are imparted to the needle 2 by means of a jack 4, a cam M by acting upon the jack butt 6 raising the jack and consequently the com panion needle to the position shown in Fig. 2, and cams I 5 and I6 immediately thereafter mov .Fig. 9 is a fragmentary view showing upper and ‘ing the needle to the position shown in Fig. 3. The cams l4, l5 and E6, in addition to the func by a pick to the upper level and the following tions just described, serve also as a means for 45 needles passing along the lower level; and maintaining the interengaging formations on Fig. 10 is a view similar to Fig. 8 but showing the needles and jacks in engagement while the the long and in some cases some of the short butt butts are being engaged by an upper or face of jacks being relowered to an operative level. such cams. As shown in Fig. 2 the face of the Although not essential to the invention the cams I 4, I5 and I6 adjacent to the jacks 4 per 50 needle bed i is indicated as in the form of 2. cyl form the additional function. The operative inder within slots of which needles 2 having butts connections whereby movement imparted to a 3 are adapted to slide. The sliding movements jack 4 will move its companion needle 2 either of the needles are effected by companion jacks 4' to an upper position such as shown in Fig. 2 or which .also slide within the needle slots and re to a lowered position as shown in Fig. 3, consist 55 main in contact with the outer edges of their of a bevel-sided recess I‘! on one edge or face of 55 lower paths, the leading jack butt being elevated 2 2,127,178 or edge 33 of the bracket 30 when the needles move to the right, Fig. 9. either the needle or jack and a correspondingly shaped lug or projection [8 on the adjacent face of the other instrumentality, e. g. needle or jack. Obviously, the cam l4 and springs 5 maintain the It will be evident from the foregoing descrip tion that by not raising the needles preparatory to and during reciprocatory knitting to the‘ usual jacks and needles in the operative position shown in Figs. 1, 2 and 3 and when in such position movements imparted to the jack butts 6 cause elevated position, the last drawn bights of thread remain in contact with the open needle latches and prevent their closing, thus avoiding the ~ the companion needles either to be elevated to the position shown in Fig. 2 or to be lowered to the position shown in Fig. 3. The lower camv l9 upon which the butts 3 of the needles ride has no effect upon the vertical movements of the needles except as at 20 where the said needle butts are engaged and the needles elevated. 15 It is evident that the jacks 4 bear against the outer face of the needles 2 at points closely adja cent the ends of each needle. The springs 5 , necessity for using a latch ring for this purpose and in conjunction therewith a gap closer adja cent to the usual mouthpiece. The invention although of particular value in conjunction with reciprocatory knitting, such as heel and toe or split-foot knitting, is not neces sarily and in all respects so limited. Omission of the latch ring is particularly ad . restraining jacks from coming out of their slots will also press the needles inwardly against the 20 back of the slots, this pressure being exerted at points closely adjacent the ends of the needle. Needles: will be maintained in better alignment due to this construction and this alignment will be maintained even though cams tend to rock the jacks within their slots. Ordinarily during heel and toe or other recip rocatory. knitting the long butt instep needles are raised to. the so-called instep level where the last drawn stitches are below the open needle latches, 30 and as a consequence thereof a latch ring must be provided to prevent the closing of the latches of the idle, instep needles. In the present instance and as shown in Fig. 4 the instep needles are not elevated but their butts 3 move along the straight line indicated by the dot and dash lines 2|, Figs. 8, 9 and 10. In this position the needle latches II are maintained in their open position by the last drawn loops 22. Preparatory to heel or toe or other reciproca tory knitting'an instep cam 23 engages the long butts 6 of the jacks 4 and elevates the same to travel along the path 24 which is above the cen ter cam [5, the said jacks remaining in such ele vated position until they are again lowered by the other instep cam 25 prior'to resumption of circular knitting, the butts 6 of the jacks being then engaged by the cam 25 and moving down to they lower level of the dot and dash lines 26. When the long jack butts 6 are engaged by the instep cam 23, the butts 3 of the needles are en gaged by a cam or rib 21 integral with cam 23, the needles thereby being held down while the jacks are disconnected therefrom and moved to the position shown in Fig. 4, the tails 28 of the jacks moving from a position in contact with the upper edges of the butts 3. Likewise the earns 21' retain the needles in the position shown in Fig. 5 while the picks 29 operate to elevate the short butt jacks to the instep level. At each half 60 reciprocation of the needles during reciprocatory knitting, if the needles reciprocate, the short jack butts 6 are engaged by a narrowing pick 29 and elevated to join the long butts of the jacks 4 where they remain until they are picked down to an operative level by widening picks (not shown), the action of the narrowing and widen ing picks upon the short butts of the jacks 4 being substantially the same as the action of the usual narrowing and widening picks upon short butts of needles. The picks 29 are guided in their movements by brackets such as bracket 38 which has a bayonet slot 3| therein, a pick 29 elevating the leading needle by riding up the inclined face or edge 32 of the pick bracket 30 when narrow 7-5 ing and being caused to move up the inclined face 15 vantageous when knitting wrap stripes in a man ner similar to that disclosed in the patent to Lawson 1,702,608, February 20, 1929, the absence of a latch ring in such machines facilitating the 20 needle wrapping. I claim: 1. A circular knitting machine of the inde pendent needle type having a cylinder adapted to rotate and reciprocate, needles and jacks 25 mounted to slide within slots of the needle cyl inder, the jacks being companion to the needles and in contact with the outer edges thereof, in terlocking formations on the needles and com panion jacks, in combination with cam means 30 for actuating the jacks and thereby their com panion needles when the latter are knitting, the interlocking connections between the needles and jacks permitting the jacks to move independently of the needles so that such needles do not knit , but remain in such a position that the last drawn loops prevent the closing of the needle latches. 2. An independent" circular knitting machine having a needle cylinder adapted to rotate during the knitting of circular work and to reciprocate 40 as during the knitting of heels and toes of stock ings, latch needles in the needle cylinder and means for rendering some of the needles inactive and thereafter adding needles to the inactive needles, the needles when inactive being at such a level that the last knitted stitches rest on the needle latches. 3. A needle and jack assembly for a knitting machine, the needle and jack each having later ally projecting butts and interlocking formations 50 to permit the needle to move with the jack or to permit relative movements of the needle and jack, in combination with cam means so operat ing upon the needle and jack butts as to elevate the jacks only to inactive‘ position preparatory to reciprocatory knitting. 4. A knitting machine having needles inde pendently mounted therein, jacks connected to some at least of the needles and having butts thereon, butts on the needles, interlocking con 60 nectionsv between the jacks and companion needles, a cam for acting upon the butts on the jacks to move them lengthwise to separate the jacks from their needles as preparatory to re ciprocatory knitting. 65 5. A knitting machine having needles inde pendently mounted therein and jacks companion to the needles, interlocking ‘connections between the jacks and needles, the construction being 70 such that movements imparted either to the needles or jacks are normally communicated to the other, a cam for operating upon the butts on the jacks and another cam for coincidentally act ing upon the butts on the needles to break the 75 2,127,178 interlocking connection and thus permit the needles to remain inactive. 6. A knitting machine having needles inde pendently mounted therein, jacks companion to 01 the needles and having butts thereon, the jacks taining said connections in engagement while earns. 12. In a knitting machine, needles and jacks, releasable and interengaging formations between and companion needles being detachably con all the needles and jacks and a cam pressing against the jacks adjacent their needle engaging portions, so that at certain positions about the temporarily inoperative. '7. A knitting machine having needles and jacks 15 independently mounted therein, butts on the needles and jacks and cam means acting upon the butts on needles and jacks for causing a rel ative movement between the needles and jacks to effect an interlocking engagement between such 20 needles and jacks after the interlocking engage ment has been broken. 8. A knitting machine having needles inde pendently mounted therein, a jack associated with each needle some of the jacks having short 25 butts and the remaining jacks having relatively long butts, interlocking connections between the needles and companion jacks, cam means acting upon the butts on the jacks to impart knitting movements to the companion needles, an instep cam for acting upon the long butt jacks to sepa rate the said jacks from their companion needles preparatory to reciprocatory knitting, and picks progressively acting upon some of the short butts on the jacks to separate the said jacks from their companion needles during reciprocatory knitting. 9. In a knitting machine, a needle and jack as sembly characterized by interlocking formations at one position only on both the needle and jack, the formations each having a beveled edge where 40 by one of the elements may be detached from the other, a butt on the jack and another butt on the needle and cams for engagement with said butts, and means for maintaining said for mation in interlocking engagement while said 45 cams are acting upon said butts. 10. A knitting machine having needles inde pendently mounted therein, jacks individual to each needle and each jack arranged in the same slot with and in front of its needle and each jack 50 being movable longitudinally with or independ ently of its needle, said jacks being provided with needle contacting projections at either end, and resilient means for urging the jacks inwardly of the slots whereby each needle will be retained 55 against the back of its slot by pressure adjacent , said butts are engaged by one at least of said nected in such a manner that at times in the knitting cycle the needles and jacks move to gether, in combination with picks acting upon certain ones of the jack butts to effect a separa tion between the jacks and companion needles so that the picking of the jacks renders the needles 35 3 machine each jack and needle must move to~ gether and at other positions movement im 10 parted to a jack will separate it from its needle. 13. A knitting machine having therein needles and jacks, cams for imparting movements to the jacks, releasable and interengaging formations between each needle and jack so constructed that 15 if maintained in engaging relationship the jack and needle will move as a unit but if not, the jack will be separate from its needle, and means act ing upon the jacks to maintain each jack and needle in engagement. 20 14. A knitting machine having needles inde pendently mounted therein, jacks individual to each needle and each jack arranged in the same slot with and in front of its needle and each jack being movable longitudinally with or independ 25 ently of its needle, each jack being provided with a needle contacting projection, and resilient means for urging the jacks inwardly of the slots whereby each needle will be retained against the back of its slot. 30 15. A knitting machine having needles inde pendently mounted therein, jacks individual to each needle and each jack arranged in the same slot with and in front of its needle and each jack being movable longitudinally with or independ 35 ently of its needle, each jack being slidable and provided with needle contacting projections at either end, and resilient means for urging the jacks inwardly of the slots whereby each needle will be retained against the back of its slot by 40 pressure adjacent its extreme ends. 16. A knitting machine having needles inde pendently mounted therein, jacks individual to each needle and each jack arranged in the same slot with and in front of its needle and each jack 45 being movable longitudinally‘ with or independ ently of its needle, each jack being slidable and provided with a needle contacting projection, and resilient means for urging the jacks inwardly of the slots whereby each needle will be retained 50 against the back of its slot. 17. A knitting machine having a slotted needle carrier needles and jacks therein, one jack for each needle and means for resiliently retaining and jacks, one jack for each needle and means the needles and jacks within the slots in said car 55 rier, butts on the needles and on the jacks, inter engaging connections between the jacks and nee dles and cams for engagement with the butts, and for resiliently retaining the needles and jacks means for maintaining said connections in en its extreme ends. 11. A knitting machine having therein needles 60 within slots in a carrier, butts on the needles and on the jacks, interengaging connections be tween the jacks and needles and cams for en gagement with the butts, and means for main gagement while said butts are engaged by one, at 60 least, of said cams, said means being a portion of at least one of said cams. ROBERT H. LAWSON.