US2178911A - Split-foot knitting machine - Google Patents

Description

Nov. 7,' 1939. R. H. LAWSON 2.178.911

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SPLI'l' -FOOT KNITTING IACHHIE Original Filed Aug. 16, 1935 15 ShOOtB-ShaSt 14 [AG/52177019: IaBEkTHZAWJMg Nov. 7, 1939. R. H. LAwscsN 2,178.911

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fjvvszvroz: 112035277? MWS'M' Patented Nov. 7, 1939 UNITED STATES PATENT I OFFlCE 2,178,911 SPLIT-FOOT KNITTING MACHINE Robert H. Lawson, Pawtucket, R. I., assignor to Hemphill Company, Central Falls, It. I., a corporation of Massachusetts Application August 16, 1935, Serial No. 36,563 Renewed April 28, 1939 be knit in a reciprocatory manner to produce the well-known split-foot stocking.

This case is a continuation as to-all common subject matter of the applicants co-pending case, United States Serial Number 439,976, filed- March 29, 1930, now Patent No. 2,083,027.

In the drawings: 7

Fig. 1 shows in elevation afu1l length, fashioned stocking produced upon the machine herein described;

. Figs. 2 through 5 show modifications of the foot structure of a stocking similar to that shown in Fig. 1, which are capable of being produced on the same machine herein described; Fig. 6 is a front elevation of the split-foot knitting machine embodying my invention;

Fig. 7 is an elevation showing in general the mechanism as viewed from the right side of Fig; 6. Fig. 8 is an elevation taken from the. opposite 25 side of Fig. 6;

Fig. 9 is a plan view, partly in section, showing the jack cams and their operating mechanism;

Fig. 10 is a plan view, partlyin section, showing the main cam block, narrowing picks and instepcams;

Fig. 11 shows in elevation the mechanism of- Fig. 10; g

Fig. 12 is a plan view showing in detail one of the high-splice and narrow sole cams and part of its operating mechanism; a

Fig. 13 is an elevation of the mechanism shown in Fig. 12;

Fig. 14 is a plan view similar to Fig. 12, but showing the other high-splice and double sole cam;

Fig. 15 is an elevation of the mechanism shown in Fig. 14;

Fig. 16 is an elevation showing the instep cams 45 and some of their operating mechanism;

Fig. 17 corresponds to Fig. 16 but shows the cams in reverse position; 1

Fig. 18 is a. view of the instep-cams as seen from the center of the needle cylinder; 50 Fig. 19 is adetail view showing operating mech anism for the eyelet closing cam, auxiliary cam block and auxiliary center cam;

Fig. 20 is a. view showing in detail some of the i mechanism for operating the high-splice and 55 narrow sole cams;

Fig. 21 is a detail view of part of the mechanism showing in Fig. 20, the cam operated lever shown in opposite position; v

Fig. 22 is a development showing a portion of the needle cylinder, long butt needles and short butt needles in section;

Fig. 23 is a development showing in section the corresponding portions of the needle cylinder and jacks therein;

Fig. 24 is a sectional view of the needle cylinder 10 showing the lower part of a needle and its jack in operating position;

Fig. 25 is an elevational view showing the oper-, ating mechanism for the widening picks;

Fig. 26 is a diagrammatic view showing the auxiliary knitting cams, parts of the needle raise cams and an auxiliary needle raise cam;

Fig. 27 is a sectional view showing the needle about to draw a stitch over the novel sinker;

Fig. 28 is a sectional view corresponding to Fig. 20 27 and showing the stitch completely measured;

Fig. 29 is a sectional View similar to Figs. 27 and 28, and showing the novel sinker acting to relieve the fabric of strain;

Fig. 30 is a sectional view showing a needle in 25 raised position; i

Fig. 31 is a plan view showing the sinker cap and certain of the sinker cams;

Fig. 32 is similar to 26 but shows a modification of the mechanism therein shown;

Fig. 33 is a detail of one type of sinker cam;

Fig. 34 shows in detail another type of sinker cam;

Fig. 35 is a sectional view showing the sinker 35 head and mechanism for operating the sinkers in the auxiliary side during heel and toe knitting;

Fig. 36 is a diagrammatic view showing the path of needles and jack butts through the cams during knitting of the leg,

Fig. 37 is a diagrammatic view showing the knitting of the high-splice, the needles moving in a clockwise direction;

Fig. 38 is similar to Fig. 37 but shows the operation in an anti-clockwise direction;

Figs. 39 and 40 are diagrammatic views showing reciprocations in both directions during heel and toe knitting;

Fig. 41 isa diagra matic view showing knitting during the instep and sole of the stocking;

Fig. 42 is a diagrammatic view showing knitting of the instep and sole adjacent the ring toe at the so-called bunion patch;

Fig. 43 is a diagrammatic view showing knitting of the ring toe; and

Fig. 44 is a diagrammatic view showing operation of needles and jacks prior to formation of a small heel.

As in the co-pending case Ser. No. 439,976, above mentioned, the machine herein'disclosed is preferably, although not necessarily, of the rotary needle cylinder, latch needle type. The machine is capable of knitting a split-foot stocking of exceptional quality since the leg and instep are both knitted at the auxiliary feed and the welt, high-splice, sole, ring toe, and the heel and toe are knitted at the main feed or side of the machine. While the idea of knitting the leg and instep at the same feed (auxiliary-feed) is not in itself new, machines constructed for knitting such a split-foot stocking have not been particularly satisfactory especially in regard to simplicity and automatic control of the various knitting cams during knitting of the several parts of the stocking.

The machine herein disclosed is adapted to produce a suture of the type shown in the patent to Augustin Gagne No. 1,673,76 although any conventional suture may be employed without departing from the spirit of the invention.

It is general practice when knitting split-foot hosiery to knit the high-splice and/or sole upon approximately one-half the series of needles, generally short butt needles, and the instep on the remaining portion of the needles, generally long butt needles. The series of needles which I employ is preferably divided into an equal number of long and short butt needles as above mentioned, but in addition I employ a number of jacks at either side of the needle cylinder, said jacks being placed directly beneath the short butt needles which adjoin the long butt needles, and further, these jacks may be divided into any convenient number of long and short butts. By automatic and selective operation of these long and short butt jacks I am able to so control any desired number of short butt needles which are adjacent the long butt needles that the instep may be produced on more than one-half the series of needles and at the same time, the highsplice and/ or sole will be produced upon less than one-half the complement of needles, such practice being desirable when knitting ladieshosiery for wear with slippers or sandals. By properly dividing the' said jacks into long and short butts, I am able to produce the heel upon a relatively small number of needles so that the point of intersection of the narrowed and widened portions of the same will be separated a few wales from the suture seam itself, this small heel bein P ssible of manufacture in combination with the narrow high-splice and sole or in combination with either one as desired.

During knitting some of the needles draw stitches at one set of cams and as the rotation or'oscillation of the needle cylinder continues,

thesesame needles will again pass under the opposite set of lmitting cams and again tend to draw or stretch the loops which are held in the throats of sinkers, said sinkers being pushed inwardly to their full extent. The' mechanism herein shown very efiectively prevents the production of defective fabric from the above mentioned causes and I have disclosed a new type of sinker and a modified form of needle raise cam which is adapted to actuate the needles to relieve the strain on the loops when the needles pass through the auxiliary knitting cams.

Referring to Figs. 1 through 5 which show various modifications of split-foot stockin s which I may produce, these stockings preferably a1- though not necessarily, are made by knitting from top to toe and a welt may be knitted upon the machine prior to knitting the remainder of the stocking or, if desired, a welt may be knitted in another machine and transferred to the splitfoot machine prior to knitting the stocking itself.

In Fig. 1 is shown a stocking comprising the welt I and'a fashioned leg portion 2 which extends down to the top of the high-splice 3. The

welt is preferably knitted at the main feed and a leg portion is knitted at an auxiliary feed, both being produced by round and round knitting. When the beginning of the high-splice portion is reached reciprocatory or split-foot knitting is commenced, the high-splice 3 being knitted at the main feed and the instep portion 4 being knitted at the so-called auxiliary feed. Following this practice the leg and the instep will be knitted from the same yarn and by the same set of cams ,so that no contrast will appear at the dividing line between the leg and instep. An extra reinforcing yarn may be knitted into the high-splice for any desired width as shown at 5. The highsplice may be made on one-half the needles or may be knitted. on less than that number of needles depending upon the set-up of jacks used under the short butt needles. In the stocking shown, the high-splice is knitted on a few less than one-half the complement of needles and the sole 6 is also produced by knitting upon a few less than one-half the short butt needles. The heel I, narrowed and widened in the usual manner, is knitted upon a few needles less than the high-splice and sole were produced upon so. that the corner or intersection of the narrowing and widening segments thereof will be spaced a few wales from the suture. Such a construction results in an exceptionally strong and wear resistant foot. Several courses before the ring toe 8 is reached, the jacks are taken out of action and both instep and sole are lmitted upon an equal number of needles to produce the so-called bunion patch 9. After the ring toe 8 has been knitted in a conventional fashion, a narrowed and widened toe l0 may be knitted in any desired way. The modification at Fig. 2 is produced in a manner similar to that previously disclosed relative to Fig. 1, however, the high-splice II is knitted upon fewer needles while the heel l2 and sole l3 are knitted upon one-half the full complement of needles.

In Fig. 3 I have shown a modified form of foot in which the high-splice l4 and sole I! are knitted upon one-half the needles and the heel I6 is knitted upon a few less than one half the needles.

In the modification shown in Fig. 4 the highsplice l1 and heel [8 are knitted as in Fig. 3, the sole 1! being dropped down several wales and knitted upon comparatively few of the short butt needles. Such a. construction results in a strong, wear resistant heel in combination with a cradle foot, such stocking being popular for wear with sandals.

In Fig. 5 the high-splice and sole have been knitted on less than half the needles while the heel 2| has been knitted upon fewer needles than sole 22 has. No reinforcing has been done in the high-splice. These modifications are merely given as examples of the many combinations of foot structure which I may automatically knit .upon the machine herein disclosed, the only Referring to Figs. 6, '7 and 8 which show the cam 48 meral 45.

justable by means general construction of a frame 23 has mounted thereon the so-called circular base 24, main drive shaft 25 and pulleys 25, 21 and 28 employed as high speed, slow speed and idling pulleys respectively. A needle cylinder 29, herein shown as of the rotary type, carries in the usual slots or tricks, latch needles which are adapted to draw stitches over sinkers mounted in a sinker head 38. A latch ring 3| of more or less conventional construction has pivoted at 32 yarn guides 33 which are controlled in the manner usually employed in the Banner type machine, by levers 34 pivoted in an enclosure 35 and which are in turn actuated through the connection of wires (not shown) which extend down to a corresponding series of levers 36 one end of which bears upon suitable cams generally designated at 31 upon cam drum 38 rotating with the usual cam shaft 39. Another shown at the right of drum 38 is effective through a lever 4| to shift a clutch at properly timed intervals for changing from rotary to reciprocatory knitting and vice versa. Such mechanism is well known in Banner machines and is illustrated sufiiciently in the Gagne patent herein mentioned, so that no further disclosure of the same need be given at this time.

A main cam block is generally designated at .42 and is mounted upon cam plate 43 which is in turn capable of being raised and lowered for a slight extent by the usual fashioning cams (not shown) on a drum herein generally indicated at 44 and mounted upon main cam shaft 39.

A second cam block, herein termed the auxiliary cam block, is generally designated by nu- This auxiliary cam block is mounted upon the other half 48 of cam plate 43 and this camplate is also adjustable for purposes of fashioning or changing stitch length by means of a bar sliding in bracket 41, said bar carrying a stud 48 at its lower end which stud is in contact with one arm 49 of a bell crank lever 58. The other arm 5| of bell crank lever 50 extends downwardly and carries at its lower end a series of contact elements 52 which are separately adof screws 53. These contact members 52 bear against certain cams, one of which is designated by numeral 54 upon a drum 55 rotating on shaft 58. These cams are adapted to control the stitch length at the auxiliary feed by raising or lowering cam block 45 at the proper time.

Bracket 47 extends to the left as is shown in Fig. 8, forming an arm 51 which serves to hold a pin 58 about which lever 50 swings. At an intermediate portion of bracket 41 is bolted or otherwise secured an extension 59 which in turn is secured to the upper end of an A-bracket 60. This bracket 68 is firmly secured to the base of the'machine by bolts 5| passing through the feet 62. This bracket serves very rigidly to hold bracket 41 and its attached mechanism in fixed position and further, serves to guide the lower end of lever arm 5|. As seen in Figs. 6 and 8, bracket 68 has an extension 63 which terminates in an angular portion 64 in alignment with another projection shown at 65. Screws and 61 are adjustably threaded into these extended portions of bracket 68 lower end of 5| so that it will swing in a predetermined plane, thus avoiding vibration and assuring that contact members 32 will bear against their cams in a proper manner.

The shaft 56 carrying cam drum 55 is mounted for rotation with a bearing 58 at the upper 2,173,911 this split-foot machine,

. which contact levers and serve toguide the finger will remain end of a bracket 69 bolted to an angular brace 10 which is in turn rigidly connected to a frame of the machine. This shaft 58' extends across the machine at the rear side thereof and carries a sprocket wheel H at the opposite end as shown in Fig. 7. This sprocket wheel H is driven by a suitable chain I2 which similar sprocket wheel (not shown) fast to cam shaft 39. A chain guard 13 is attached to the frame and serves to protect the anism from dust and dirt and at the same time prevents the operator from getting caught in the chain or in the sprocket. An arm 14 pivoted at 15 carries at its opposite end a weighted tensioning sprocket 16, thus maintaining the chain under suitable driving tension at all times.

In the sameFig. '1 are shown the belt shifter generally indicated at 11, the depending lug 18 case may be, such mechanism being the conventional construction on Banner and like machines.. 'Ihe high-splice and toe of the stocking may be reinforced by an additional yarn inserted throughout any desirable portion of the width of the same. Referring to Figs. 7 and 9, there is described mechanism which is used for introducing this reinforcing yarn which is knitted at the main yarn feed. As mentioned before, a series of yarn guides 33 are pivoted at 32 in the latch ring or carrier ring 3| and these yarn guides are normally controlled either to feed their yarns to the needles or to withdraw the yarns out of feeding relation to 'the needles inaccordance with certain cams 3T; 33 connected through wires engages another (not shown) to other levers 34 which engage the yarn guides and actuate them in a normal manner. To one of these levers 34 which coacts with the particular yarn guide which is to feed the extra reinforcing yarn, vertically extending link BIL-Fig. 9, to a lever 8| pivoted at 82 on a fixed bracket 83. The bracket 83 extends in an angular fashion at either side to form a connecting base 84 which attaches through suitable bolts to the circular base of the machine. At the opposite end lever 8| is slotted and engaged by a, laterally projecting pin 85, said pin being connected to the outer end of a lever 86 which is fast to shaft 81. Shaft 81 is capable of being rocked through a small angle by mechanism presently to be described, that is, when the reinforcing finger is to be operated by it, but at other times the said shaft is shiftable along its axis to a position which renders it inoperative. The shaft 81 is rotatable and also capable of being shifted axially in bearings 88, 88 which extend upwardly from a bracket 90 carried by the circular base. At its outer end, shaft 81 has fixed thereto a lever 9| which carries at its lower end a hardened cam follower 92, Fig. 7. A cam of 104 gear shaft 94 and carries thereon cam segments 95, 9B, 91 and 98 and these segments are adjustable about the circumference of cam plate 93 and form certain spaces or depressions 99 and Hill approximately 180 degrees apart. By

adjusting cam segments 98 it is possible to vary the angular extent of these depressions and thus, the time intervals the reinforcing yarn in feeding position, it being understood that when follower 92 rides upon the concentric surface plate 93 is fixed to the end 7 of the cam segments the reinforcing yarn is out of feeding relation to the I j actuating follower 92, lever 9I and the attendant mechanism as the follower drops within one of the depressions, I provide a suitable tension spring IN connected at one end to lever 9I and at the opposite end ofa pin I02 projecting from a suitable part of the circular base.

At the end of shaft 81 opposite that to which lever 9I is connected, I make fast a collar I03 which has a suitable groove I04 therein. On a bracket I05 attached to some suitable part of the machine frame I pivot at I05 a bell crank lever having a horizontal arm I01 and a vertical arm I00, said vertical arm carrying a projecting pin I09' for engaging within the slot I04. At the other end of horizontal arm I01 I pivot at I I0, the

upper end of a depending link III which connects at its lower end to a lever II2 which bears upon a cam (not shown) on the cam drum 2',

which is suitably proportioned to shift shaft 81 axially in its bearings 88 and 09. In Fig. 9 shaft 81 is shown in its inoperative: position, said shaft being pushed to the right as seen in the figure until follower 92 is out of operating position relative to the cam segments 95-98. .The shaft 81 is pushed to the right against the action of a compression spring I I3 hearing at one end against bearing lug 89 and at the other against a collar II4 clamped to shaft,v 81. When lever arm II2 falls ofi its supporting cam (not shown) spring I I3 will function to shift shaft 81 to the left until stopped by collar II5 striking bearing lug 89. In this position follower 92 will engage cam segments 95-98 in which case the reinforcing finger will be operated. Pin 85 has been made of sufficient length to slide within the co-acting slot in lever 8| so that it will always engage the same in either of its positions.

The mechanism just described controls the splicing or reinforcing yarn finger only at such times as splicing is going on. That yarn finger is under the usual control from the main pattern drum and will be allowed to move to operative position at the beginning of splicing and will be withdrawn at the end of splicing in the usual way. That control from the main drum trated in this case since the same is well-known by those skilled in the art and is illustrated and described in Lawson Patent #2,083,027 at Figs. 19 and 20 and the description relative thereto.

The main cam block generally designated by numeral 42 is shown in Figs. 6, 10, and 11; the cams being diagrammatically shown in Figs. 36 through 44. This cam block is capable of being retracted when needles are to be leveled for purposes of transfer and at other desired times by means of hell crank lever II6 connected to the block itself by a link II1, said bell crank lever being actuated by a rod II8 which operates from a cam drum in a conventional manner. A spring I I9 and plunger I20 operate to hold the cam block inwardly against the cylinder to be retracted as above mentioned.

This cam block carries knitting cams I2I, I22, upper center cam I23 and lower center cam I24. Knitting cam I2I is capable of beingretracted during round and round knitting by means of a link I25 connected to a stud I25 fast in the end of a sliding stem which forms an extension of the cam. I2I. Link I25 is connected to one arm of abell crank lever I21 and the other end of that lever is connected to a depending link I28 is not illusexcept when it is of the cam above mentioned. Narrowing picks I33 and I34 are also carried by this main cam block and narrowing pick I33 is automatically swung out of the way when knitting cam I2I is withdrawn from action by means of a finger I35 which slides with the cam and swings pick I33 by means of a pin I35 projecting therefrom.

A bracket I31, shown in detail in Figs. 10, ll, 16, 1'1 and 18, constitutes a suitable mounting for upper instep cam I38 and lower instep cam I39. This bracket I31 is securely bolted to cam plate 43 and has two slots I40 and I in which stems I42 and I43 of the upper and lower instep cams slide. A plate I44 is secured to bracket I31 by screws I45 and serves to hold cam stems I42, I 43 within their operating slots. It is a feature of these so-called instep cams and their operating mechanism that either cam may be actuated independently of the other or that both cams may be operated at the same time. Lower instep cam I39 is normally held in position to engage long butt needles by means of a spring I46 which encircles a plunger I41 attached to said cam and also bears within a drilled hole I48 within the bracket. The stem I43 has a slot shown at I49, said slot being beveled at its rear end as shown at I50. An operating rod I5I slides withinva vertical opening passing upwardly through bracket I31 at the left hand edge of slots I40, I, this rod being cut away as shown at I52 to allow a limited movement of 'cam I39 and its stem I43; and further, a beveledsurface I52 on the operating rod acts to withdraw cam I39 from operative position as the said rod is drawn downwardly whereby beveled edges I52 and I co-act to cam said stem I43 outwardly.

The upper instep cam I38 has a short stem I42 which slides within groove I40. Operating rod I5I is cut away to leave only a narrow portion I53 extending upwardly. Bracket I31 is slotted at I54 and a pin I55 fast to stem I42 projects upwardly through this slot. At I55 I have pivoted a bell crank lever I51, one arm of which has a slot I58 engaging said pin and the other arm carrying, connected thereto at I59, a link I50 which is actuated by suitable mechanism to rock bell crank lever I51 and move the cam I30 into and out of position. The other end of link I60 has adjustably attached thereto a connecting element I5I which is pivoted at I52 to one arm I53 of another hell crank lever. This bell crank lever is pivoted at I64 to a bracket I65 fast to the yarn lever bracket of the machine and the other arm I65 of said lever has a connection I51 through a hole in which rod I58 projects. This rod I58 is connected to one end of a lever the other end I69 of which contacts the pattern chain I58 shown in Fig. 6. Two collars I10 and I10 are clamped to the rod I68 and maintain springs HI and I12 under tension so that loose collars I13, I14 will act upon lever arm I65 through connection I61 in a resilient manner.

As before described, rod I5I operates to withdraw the lower cam I39 from operative position. For the purpose of actuating this rod I5I I have pivoted a bell crank lever having arms I15 and I16 about a pin- IT! in a lug I18 extending downwardly from a plate 43. The arm "5 is slotted as shown at I19 and a pin I88 works in said slot and is attached by threaded engagement, to the lower end of rod I5I. At the outer end of arm I18 is connected a link I8I which swings about pivot point I82. Link I8I extends over to the right, through the frame of the machine and connects to the upper end of clutch shifter so that the lower instep cam is actuated upon going into and out of reciprocatory knitting.

The auxiliary cam block has been generally designated by numeral 45 and carries knitting cams I83 and I84, center cam I85, guard cam I86 and auxiliary raise cam I81, this latter cam being preferably formed in two parts having an overlapping joint at the center, see Fig. 32. These cams function at the auxiliary side of the machine to knit the leg portion during circular knitting and the instep portion of the stocking by reciprocatory or split-foot knitting. The mechanism for raising and lowering the block forjpurposes of fashioning or changing stitch length through its connection to plate 46 has been previously described.

Widening picks are also carried on this auxiliary cam block and are designated in Figs. 6 and 25 by numerals I88 and I89. The mechanism for operating these picks is of simplified and novel construction. On a yoke I98 attached to the auxiliary cam plate, pivoted at opposite points I9I and I92 are arms I93 and I94 adapted to swing in opposite directions under the influence of a plunger I95 which extends downwardly through I said yoke and is operated in a known manner by a widening pick lever I96. Plunger I95 carries alaterally extending pin I91 which engages corresponding slots I98 in the ends of levers I 93, I94. Widening pick lever I 95 is actuated to push plunger I95 upwardly which swings the arms I93, I94 in one direction and a spring I99 attached at one end to the yoke and at its other end to pin I9'I-'is under sufiicient tension to draw plunger I95 in the downward direction. Widening picks I88, I89 carry pins 288, 28I extending in a rearward'direction. These pins are engaged by hardened contact elements 282, 283 which are adjustably fixed at the outer ends of the oppositely swinging arms, said adjustment being possible by sliding screws 284 in slots 285 be ore tightening the same to clamp the respectiv hardened elements 282, 283 to their arms.

r In Figs. 22, 23. and 24 I have shown the needles and jacks which it is necessary-ate employ for making such a stocking as is illustrated in Fig. 1,

for example. Certain sections of the needle cylinder 29 have been represented as if developed into a plane in Fig. 22. Short butt needles 286 and long butt needles 281 have been shown therein. it being understood that the machine contains substantially an equal number of each type of needle, separately divided at the opposite halves of the cylinder.

In Fig. 23 I have shown the corresponding portions of the needle cylinder and certain long butt jacks 288 and short butt jacks 209 disposedtherein. For making such a stocking as is shown in Fig. 1, I place at either side of the needle cylinder under the terminal short butt needles, nine long butt jacks and adjacent these long butt jacks, three short butt jacks; I have chosen this division of jack butts merely for purposes of illustration and it is to be fully understood that the in'. ention is in no way dependent upon the relative number of long and short butt jacks emrefer to Figs. 8, 9, 12-15, 20 and 21. In Fig. 9 are shown the six cams which function upon said jacks, said cams being designated by numerals 2"), 2H, 2I2, 2I3, 2I4, and 2I5. Thecams designated at 2 and 2I5 are of triangular shape and are rigidly connected to the circular base by means of screws passing through the extensions 2I8 and 2". Cam 2I8 is known as the suture cam and is permanently attached to a stem 2! which slides in a suitable bracket 2I9 which is adjustably connected to the circular base. A sliding member 228 which carries a stepped and inclined slot 22I is adapted to be reciprocated within said bracket by. mechanism later to be described. Cam stem 2! has secured therein a pin 222 which projects through the slot .22I and thus, when element 228 is reciprocated, the pin will be forced in a radial direction within stepped slot 22I so that said cam will be positioned either in its inactive position as shown in Fig. 9, an intermediateposition wherein it will engage only long butt jacks, and in a third or inner position where it will engage both types of jacks. Attached to a pivot point 223 on one end of the base of bracket 1 84 is a bell crank lever having one arm 224 connected to slide 228 and another arm 225 to which is attached a link 226. This link 228 is actuated by bell crank lever 221 pivoted upon a bracket 228 fixed in an upright position on the circular gular bracket 233. This lever 23I extends to the other side of its pivot point and terminates in a cam engaging toe 234. This toe is contacted by appropriate cams on the stop motion cam drum 19 which through the linkage just described, ac-' tuates slide 228 and thus cam 2I8. A spring 235 attached to the side itself and another spring 236 connected to lever 23I function to return said linkage and cam to their initial position after toe 234 has passed over-the cams beforementioned.

Cams designated at 2I2 and 2I4 and known as the high-splice and double sole cams. are actuated by mechanisms shown in Figs. 6, 8, 9, 12-15, 20 and 21. Referring to Figs. 14 and 15 cam 2I2 has a stem 231 which slides in a bracket 238 connected by suitable screws to the base member 24. A pin 239 extends upwardly from the cam stem and projectsthrougha slot 248 which extends ina radial direction in cap 2 on bracket 238. This'pin is alsoengaged by a slot 242 extending lengthwise of a lever 243 pivoted on the bracket at 244. The last mentioned lever has connected to its free end a link 245 which is adapted to swing said lever about-its pivot when a shaft 248 (Figs. 8 and 9) carrying an arm 24'! fixed at one end of said shaft and having its other end pivoted at 248 to said link is oscillated. This shaft 248 is mounted for rotation

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