US2694302A - Mechanism for warp knitting machines - Google Patents

Description

Nov. 16, 1954 c. E. WEINBERG 2,694,302

MECHANISM FOR WARP KNITTING MACHINES Fqlled Dec. 31, 1952 United States Patent MECHANISM FORWARP KNI'ITING'IMACHINES 7 Carl E. Weinberg, "Tenafly, NJJ; Application December. 31, 51952, Serial No. 828,991 v.51..laims. '.(Cl. 66----'86) This invention relates 1 generally to warp knitting; machines and more particularly to the structure of guide bars and thread .5 guides i attached thereto.

Heretofore, guide bars ofknittingandlike textile machines were manufactnredfrom' steel or like heavy metal which perform reciprocable oscillatory movements'for warping the threads about the knitting needles. EThese known guide 'bar structures, however,; have become: more and more unsuitable and uneconomical sincethe=-development of modern knitting machines which work with extremely high speeds.

It is, therefore, one of the primary objects of this invention'to'provide means affording-considerable reduction in .mass velocity of the movable machine parts, 'in;particular, of the guide bars withtheirthread guides.

It is another object er the presentinvention to provide means facilitating easy mounting:andreplacement-of the thread guide. holders or carriers with respect to'and' their iccurate alignment and adjustability relative to the guide ars.

It is a further object of the invention to provide means conducive to simplified and improved fixation of the thread guides in position in said holders.

Yet a further object of the present invention is to provide means ensuring continuous and undisturbed operation of the guide bars without regard to any temperature changes or atmospheric variations, which will not substantially aifect the working conditions of such sensitive parts as guide bars, needle or guide holders, etc.

Still another object of the invention is to provide means rendering the possibility of reducing the frictional engagement of the warp threads with their guides to a minimum.

A further object of the invention is to provide means affording observation and surveillance of the warp threads, in particular, on the rear or inner guide bar through openings of the outer or front guide bar and from the front of the knitting machine.

Other objects and advantages of this invention will become apparent from the drawing and the description thereof having reference to some of many possible embodiments of the invention.

In the drawing:

Fig. 1 is a perspective view of the guide bars with guide holders of a knitting machine and made in accordance with the invention.

Fig. 2 is an enlarged side elevational view of a guide holder with guide elements fixed thereto and with closure plate partly removed.

Fig. 3 is a sectional view of a complete guide holder with closure plate, the section being taken along line 3-3 of Fig. 2.

Fig. 4 is a front elevational view of one of the guide bars with guide holders attached thereto, but illustrated in somewhat modified form.

Fig. 5 is a sectional view taken along line 5--5 of Fig. 4.

Referring now more particularly to Fig. 1 of the drawing, there is disclosed a portion of a warp knitting machine consisting of the front guide bar and rear guide bar 11. Front or outer guide bar 10 is fixed to a bracket 12 at 13 in a known manner whereas rear or inner guide bar 11 is fixed to bracket 14 at 15. In this particular instance and in accordance with the invention, the guide bars are manufactured either from known reinforced plastic or plastic composition or from aluminum, magnesium or its alloys. As further seen .2 in. Fig. 1, both guide bars care provided ---with rows 'of V spaced perfora'tions or 1 apertures 16,. 17 which may be aligned with each other' in. predetermined ;position of saidr-guide. bars. E-ach of these apertures 16, 17 is further providedwith-a downwardly direo'ted elongated slot 18 for apurposehereinafterdescribed.

Guide bars lfl a nd- .11- are-adapted toreceive the: thread or yarn cguides -having the: eyes 19for-.the insertion of. the threads'Aa-nd B. Guides'20 are'fixed and locked inithread-guide holders 25a.,(jFig. 1). -IrrFig. 2 a guide holder 25 in modified form-'-is-shown,. which has a base plate -21'-and a cover plate Both plates have regis-tering slots. :23 and 24, respectively, forming -:a? passageway30. Slot 24 of cover platezz-has furtherwa recess 24a :for receiving :a washer 24b: to :thereby lockingly receive a bolt and nut assembly hereinaftermeferred-to. Each guide holder has a; plate -21 with a serrated recess 23a forreceiv-ing lead orother; easily *fusible alloy26 tothereby facilitate embedding therein of the aforesaid t-hread' g-u-ides--20. Thusthe latter are-retained impositionbetween basei plate-=21 and cover plate-22 and more specificallyfiinregistering recesses -2.7,v 28 of these" plates.

Guide holders 25a are afiixed to the guide barsad jacent apertures 16. 17 and=slots1'8:by means ofi bolts 34 threadedly engaging}tapped'holes-tnotshown) or slots 18 in-a mannenastseeniin Fig. 5. Whilenguide' holder 25 of 'Fig, 2 is: shown with a tapered: head t 32,v the head 25b of each guide holder 25a is somewhat arcuateshaped.

As: can be further seen; frormFig. '-1,;tl1e guide holders or earriersZSa-mayabut against'veachz other along-abutting lines 33 andiare fixed tin alignedgposition with 'each other by means of bolts having bolt heads 34.

Fig. 4 shows a portion of guide bar 35 in front elevation having the apertures 36, 37, 38 of similaror dissimilar design. Each of the slots 36, 37, 38 may be further provided with a downwardly directed elongated slot 39, 40, 41 extending from the respective apertures 36, 37, 38.

As may be visualized from Figs. 4 and 5, the thread guide holders 25 may be affixed and adjusted to each other by the engagement of bolts 42 passing through the respective slots 39, 40, 41 and secured on bar 35 by means of heads 43 and nuts 44 whereby each thread guide holder 25 may be aligned and adjusted in position relative to guide bar 35.

It is to be stressed that the thread guides 20 may be held in differently shaped holders which may be readily adjusted to each o her in accordance with the slot and nut and bolt connection as herein described. It is further to be noted that this slot and bolt arrangement readily affords replacement and repairs of thread guide holders and contributes to the further advantage that the slots as well as the apertures with which the slots communicate, bring about a condsiderable reduction in weight of the guide bars, even if the same should be manufactured of steel material.

It is further contemplated, according to the invention, to provide such apertures substantially centrally of and in steel guide bars now in use whereby the apertures may assume different shapes with respect to each other, such as square, oval, rectangular, etc., forms. It has been found in practice that guide bars of the aforesaid construction are sturdy, are not subject to the influence of temperature changes or of atmospheric conditions and may be used with great advantage in modern high-speed knitting machines.

The elongated slots 39, 40, 41, etc., and also slots 23, 24 of each guide holder not only contribute to the further reduction of weight of the guide bars (besides the apertures 16, 17 or 36, 37, 38, etc.) but also afford the employment of guide holders of different makes on one and the same guide bar. The aforesaid bolt and slot connections between guide bar and guide holders facilitate easy threading of the warp yarns A, B through the guides 19, 20 and ready mounting of the latter by means of the guide holders which may be more easily aligned and adjusted as herein referred to.

The friction between the warp threads A, B and guides 19, 20 may be readily regulated and the deflection of the warp threads may be controlled in view of the fact that the guide holders are adjustable relative to the guide bars.

It is to be understood that bolts and nuts herein referred to may also be made of light metal, such as aluminum, magnesium or its alloys to further reduce the mass velocity of the reciprocably movable guide bars and that other means than lead or similar alloy may be employed to'fix the guides 20 in their holders or carriers.

The invention is also applicable to sinker and needle construction in a manner herein referred to.

Although severat embodiments of the invention have been described and shown in the drawing, it should be noted that the invention may be realized in modified form and adaptations of the arrangements herein disclosed may be made as readily occur to persons skilled in the art without constituting a departure from the spirit and scope of the invention as defined in the objects and in the appended claims.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent, is:

1. In a thread guide mechanism for a warp knitting machine; a guide bar provided with a row of spaced apart apertures, holders for thread guides, and means adjacent said apertures for fixing said guide holders in aligned position with each other and relative to said apertures of said guide bar, said guide bar being made of light-weight material and being provided with respective slots communicating with said apertures.

2. In a mechanism according to claim 1, said fixing means being engageable with said slots, respectively, and for adjustment of said guide holders relative to said guide 3. In a mechanism for a warp knitting machine; a guide bar provided with a row of spaced apart and aligned apertures, a plurality of holders for thread guides, and screw bolt means engaging said bar adjacent said aper- 35 Number tures for fixing said guide holders in aligned position with each other and relative to said apertures of said guide bar, said guide bar being further provided with elongatd slots communicating with and extending from said apertures therebelow for receiving therein said bolt means.

4. In a mechanism according to claim 3, wherein said slots of said guide bar extend in transverse direction to said bar.

5. In a mechanism for a warp knitting machine; a guide bar provided with a row of spaced apart apertures, and holders for thread guide elements attachable to said guide bar and at a level below said apertures, each of said holders being provided with a base plate and with a cover plate, each base plate and each cover plate being provided with respective registering recesses, at least the recess of one of said plates being defined by a serrated wall for receiving therein fusible material, to thereby embed therein portions of said guide elements when the latter are inserted in said guide holders.

References Cited in the file of this patent UNITED STATES PATENTS Name Date Cooper Mar. 22, 1892 Kinsella et al. Sept. 17, 1935 Kinsella et a1. Apr. 21, 1936 Morton Oct. 21, 1941 Amidon Jan. 14, 1947 Lambach Oct. 21, 1947 Friedmann Dec. 9, 1947 Noe July 18, 1950 FOREIGN PATENTS Country Date Germany Dec. 19, 1940 Number

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