US2059144A - Yarn carrier stop device for straight knitting machines - Google Patents

Description

E. RICHTER Oct. 27, 1936.

YARN CARRIER STOP DEVICE FOR STRAIGHT KNITTING MACHINES Filed March 6, 1934 5 Sheets-Sheet 1 Emil gchw,

IN VEN TOR.

A TTORN Oct. 27, 1936. RICHTER 2,059,144

YARN CARRIER STOP DEVICE FOR STRAIGHT KNITTING MACHINES Filed March 6, 1934 5 Sheets-She'et 2 :Fl E;- E. 1 11 B I .5.

2 rzzb INVENTOR- ivhfr,

Emil

I ATTO E. RICHTER Oct. 27,1936.

YARN CARRIER STOP DEVICE FOR STRAIGHT KNITTING MACHINES Filed March 6, 1954 ,5 Sheets-Sheet 3 INVENTOR:

fmiljjic m, BY

ATTORNK Patented Oct. 27, 19 3 6 I PATENT OFFICE YARN CARRIER. STOP DEVICE FOR, STRAIGHT KNITTING MACHINES Emil Richter, Spring Crest Courts, Pal, assignor, by mesne assignments, to Textile Machine 1 Works, WyomissingJa a corporation of Pennsyl vania f Application March 6, 1934, Serial No. 714,235

1 Claim.

My invention relates' to straight knitting'machines, and particularly to yarn carrier stop means. for limiting or arresting the movement of the reciprocative carrier rods, or equivalent ,ele-

-ments, in.such machines. v

-'In the production of certain fabrics, especially full fashioned stockings, it has been found desirable or'necessary to modify or vary the throw of selected yarn carrier rods as ordinarily estab- 10 lished by the usual yarn carrier stop mechanism of the knitting machine, i. e., so. that the throw of one or more of the yarn carrier rods is greater or less than that ordinarily established by the usual carrier stops employed.

For example, and by way of illustration only,

is is customary to,protect the heeland toe portions of a stocking against the extra wear ordinarily'occurring at these places, by adding to these portions one or more reinforcing or plating yarns interknit with the main body yarn, such result being obtained, after knitting the leg portion of the stocking blankto the place where the reinforcement begins, by placing in operation additional yarn carrier rods for laying the extra or reinforcing yarns. Heretofore, these rods have had the throw thereof determined by the usual end and intermediate stops of the machine, and since the respective end stops of each group at the ends of the machine move only in unison, the an limit of travel of the reinforcing carrier rods at the selvedge edges of the blank has coincided with that of the main body. yarn carrier, thus causing the reinforced areas to extend to and be included in, the selvedge edges.

35 When the opposite selvedge edges of the stocking blank are looped or stitched together, there I ordinarily results a seam of considerable bulk which is uncomfortable to the wearer and unsightly in appearance. These disadvantages may be obviated by the use of the present invention,

since when a reinforcing yarnor yarns have been laid by the plating carriers to a point short, by a i certain distance, from each selvedge edge of the blank, as by the width of two or three wales, the

45 plating carrier rods may be arrested at this point by the stop devicesdisclosed herein, the movement of the through or main yarn carrier rod continuing to the selvedge edge; this operation resulting in the production of a selvedge edge. or mar 5 gin of reduced thickness, relative to the reinforced areas of the fabric, from which a. seam of the desired characteristics may be formed; permitting the main yarn carrier only to continue-to the selvedge edges, thelatter will be free from as reinforcement; by causing one of the-plating carriers at each side of theblank to also continue to the selvedg'e edges, the same may be reinforced, but to a degree less than that of the adjoining areas in which additional reinforcing yarns are employed. 5

' and durable in construction, economical to manu- 15 facture and efiective in its operation;

Another object of the invention is to provide an auxiliary stop device adapted to installation. on machines of standard construction, and to existing installations, with a minimum of labor, expense and structural alteration. 20

Another object of the invention is to provide a. stop device for modifying the-action of the usual stop members, which device shall be in the nature of a readily-available and operable auxiliary attachment or-appertenance, for quick and convenient manipulation incident to the knitting operations; as distinguished from calibrating or set adjustment devices, such as screws and lock nuts, or the like.

Another object of the invention is to provide a device in'which certain parts may be readily interchanged and renewed, either to compensate for wear or to vary the throw of the carrier rods in accordance with different requirements.

.Another object of the invention is to. provide a knitting machine attachment that shall be positive and accurate in operatiomand permit adjustments of fine degree. n

A further object is to provide in combination with the end stops of a straight knitting machine, an auxiliary stop device which can quickly and easily be thrown into and out of operation, thereby to chage at will the throw *of the yarn carrier rod controlled by the end stop.

With these and other objects in view, whichwill become apparent from the following detailed. description of the illustrative embodiments of the invention shown in the accompanying draw- .and having distance breaks, of the carrier rods,

- stops and associated parts of one section, of a device, as viewed at the left-hand side of Fig. 1, with parts thereof omitted, and other parts added,

full-fashioned knitting machine, to which one embodiment of my inventlon has been applied;

Fig. 2 is a view, in front elevation and enlarged to substantially actual scale, of a portion of the which are: not shown in Fig. 1;

Fig. 3 is a view' taken substantially along the linel-lofFis. 2;-

Fig. 4 is a view, corresponding to 'a portion of Fig. 2, but on a larger'scale and having portions broken away and other parts in section, of a modined form of the invention; Fig. 5 is a view of thestructure of Fig. 4, taken" at right angles thereto;

'areas E of Fig. 8, and indicating the detail loop invention; and:

Fig. 6 is a view, similar to Figs. 2 and 5,-of

a further modified form of the invention; v

Fig. 7 is a view of a portion of the structure of Fig. 6,.taken substantially'along the line 'I--'I thereof;

. Fig. 8 is a plan view. of the toe section of a stocking, fabricated 'by -a machine embodying the Fig. 9 is a view representinga magnification of structure thereof. I

- In the drawing, only those parts of a full! fashioned knitting machine necessary 'to a ,com- .plete' understanding of the invention are. therein shown, the various other parts, and the operation thereof being well known in the art, and shown and described indetail in the ReadingFull Fashioned Knitting Machine Catalogue, copyright .1929, published by the Textile Machine Works.

. Reading, Pennsylvania.

The auxiliary stop devices of the invention may be employed either with the carrier rod end stops or .the intermediate stops of a straight or fullfashioned knitting machine to vary, for any'purpose, at the selvedg e edges, or intermediate the selvedg'e edges, of a fabric, the throw of a selected yarn carrier or carriers as ordinarily establishedby the end and intermediate stops. The end stops, at eachend of the machine, are moved in unison, no individual or relative adjustment being provided, except that of initial installation le'ctive' cooperation with the usual end steps or calibration, which may also require occasional change by reason of damage or wear. According to theillustrative embodiment of the invention,

the auxiliary sto'p'elements are provided for sewhereby'to reduce the throw of the associated carrier rods,'without afiecting the throwoi the other rods as determined-by the end-stops as sociated with such other rods; these auxiliary elements bein'g'in the form of gauge plates or strips for insertion between the rods and, the

ordinary stops, vor they may be in the formof eccentric cam for moving the ordinary stops, .or of any equivalent form, either on the stationary or movable parts, as will be more apparent from the following description and the accompanying Referring to Figs. 1, 2, and 3, carrier rods ll eachjof which carries thread carriers l I for cooperation with the usual needles 8 and sinkers and dividers! in the various knitting sections, one

of which sections is indicated at the lower portion of Fig. 2, are longitudinally reciprocably mounted between sets or end' stops l2. Pivot pins ll, on

-' which the stops l2 are mounted, are secured,

as by brackets I 5, to nuts IS on a usual feed screw or carrier rodsplndle l I; A screw IS, in the lower.

; effected by manipulation -the nuts ll.

- As so far described, the structure 'of Figs. 1, 2, and 3 isusual, the stops l2 being individually The plate 2! is preferably secured portion of each stop I2, is locked in position by a nut is, and has a head 2| for arresting the movement of the cooperating carrier rod ll. Callbrating adjustments, to originally set the throw of the rods I] and to compensate forwear, are 5 of the. screws I8 and pivoted on the pin's II for selectively throwing the 10 heads 2. about these pivots into, and out of, .the operative position shown, by manipulation 0.1 handles 22. The screw ll remains stationary excent-when the stocking blank is to be narrowed, at which time rotation of the screw moves the stops inwardly in unison to a new-position to thus reduc'e'thethrow ofthe rods ll.

In accordance with a preferred form of the invention, as indicated in Figs. 1, 2, and 3, an auxiliary stop, for eachof any desired or required 2 number or the main stops l2, may comprise a lever 23 having a bifurcated end 230/ embracing the handle 22 and pivotally secured thereto, as

by a pin 24. A groove or channel 23b, in the face of the" lever 23 next to the carrier rod Ill, 2

receives a gauge plate or strip 25, the thickness of which is determined by the numberof wales by which it is desired'to reduce the ply of a selvedge edge of a stocking: as will further appear. *thelever 23, as by a screw and lock-washer de ce 2; all of the parts being accurately machined for precision iltj'and related to prevent subsequently working loose, as in the featme whereby the strip 25 is disposed in the recess of thelever 22-and accu- .rately held at its edges, in additionto the holding eifect of the screw '2', and in the feature wherein the arms of the bifurcated end of the lever 22 operate in broad-area engagement with, and over,

cooperating areas on the sides of the handle '22. v

As indicated on one of the handles 22,. at each end of the'rods II, and in full lines in Fig. 2, the lever 22 is in position to hold the strip 25 between the carrier-rod II and the corresponding head a, thusreduc'lng the throw of the rod to less than the ordinary by a distance equal to the thickness of the gauge'strip 2|. 'Theithickness or this strip may be such as'to provide a selvedge edge of reduced thickness of any. desired num- 'ber of wales vand be one of a set of interchangeable stripsfor changins this number; 'the strip of Figs. 1,2,and 3 being of -a thickness toprovide .a selvedge edge of reduced thickness of two wales. in Fig. 8, the instep section of a stocking has a singie-thread'web area A, a'rein- 5 forcediarea B of double-thread thickness, ,and a further reinforced area. 0 of triple-thread thickness, on the latter of which, as 'shown to magnifled scale in Fig. 9, Isprovideda relnforced'sel- In Fi s. 4 and 5, the screw llbhas a constrict-' ed portion Ilsurrmmded by a ferrule 29 and holding a headed screw 3|,between' which and the inner end of the-ferrule, a helical spring v22 v surrounds constricted screw portion to 76 the ferrule inwardly along the screws, or to'the left as viewed in Fig. 4. ,A flange 38 and a screwthreaded portion 33a outwardly thereof on the ferrule, provide seats for a wear or gauge head 34. A gauge plate or strip 251;, including a lower end portion 36 of inverted substantially U-sha'pe "having beveled lower edges, an upper end handle or grip 31, and a vertical straight-sided central slot 39, is vertically slidably fitted against the stop l2b, as by a screw 4|l'on which is mounted a member constituting a rectangular guide for the strip ill-the slot as.

' nary stop function, and by which it. may be To operate this device, it is merely necessary to move the'strip 25b from its frictionally held, or otherwise secured, upper position to a lower position, during which the head 34 is moved to the right, as viewed in Fig. 4, against the action of the spring 32, and held by the spring against the strip.

In Figs. 6 and 7, the parts adjacent to the car} rier rod are constructed as in an ordinary stop, and the adjustment of the invention obtained by mounting the stop I20, as a unit, upon an eccentrio cam portion 44 of the pivot pin or shaft l4c,.

about which the stop may be pivoted, in its ordimoved from left to right, asviewed in Fig. 6, by turning a knurled handle extension 45. A ra-.

dial pin 46 has snug frictional-sliding fit in a.-

radial aperture in the bracket I50 for similar fit in a radial hole or holes 41 in the shaft Me.

By radially moving the pin 46 clear of the pin He, the handle 45 may be manipulated to turn the shaft to any desired position, and the pin 46 returned to again lock the shaftythis operationadjusting the stop l2c and the head 20 to vary the throw of the carrier rod, as in the devices above set forth.

Of course, the improvements specifically shown and described, by which I obtain the above results, can be changed and modified in various ways without departing from the scope of the invention herein disclosed and. hereinafter claimed. Further, it is to be understood that the means specified in the claim for stopping a selected carrier rod an incremental distance ahead of a cooperating carrier rod, includes any element or combination of elements which acting together or singly, causes a selected carrier rod to stop ahead of a cooperating carrier rod moving in unison therewith, whereby the end of a selected carrier rod is spaced an incremental distance from the end of a cooperating rod when both rods have completed their effective strokes in one direction. That is to say, the above-mentioned means defines any means for stopping a selected carrier rod longitudinally ahead of a cooperating carrier rod by an increment of distance.

In a straight knitting machine having a plurality of yarn carrier rods, the combination of a movable head having a stop member thereon for each of said rods, eachof said stop members to be thrown so said extension plate will hang down in contact with the abutment surface of the abutment member of the stop member to which the lever isattached to vary.- the throw of the yarn carrier rod with which the stop member coacts by a uniform amount irrespective of the position of the abutment surface of the abutment member relative to such stop member and said lever and stop member arranged so that the lever may be thrown back and will lie above the stop member to hold the lever in inoperative position by gravity. EMIL RICHTER.

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