US2070914A - Implement bar for embroidering machines - Google Patents

Description

- Feb. 16, 1937. M. P. NEUBERT ET AL IMPLEMENT BAR FOR EMBROIDERING MACHINES Filed March 28, 1936 mLIR/Yeu INVENTORS lazl d zm m" 5%,,

I fiataxamq ATTORNEY Patented Feb. 16, 1937 PATENT OFFICE IMPLEMENT BAR FOR EMBROIDERING MACHINES Max P. Neubert, Teaneck, N. J., and Oskar Mueller, New York, N. Y.; said Mueller assignor to said Neubert Application March 28, 1936, Serial No. 71,400

4 Claims.

This application is a continuation in part of our application Serial No. 55,148, filed December 19, 1935.

This invention relates to embroidering ma- 5 chines or the like and more particularly to the implement bars such as needle bars, borer bars, gtc, and means for movably supporting said ars.

As hitherto constructed each bar carries a single row of implements and is so mounted in the machine frame as to be capable merely of a horizontal reciprocatory motion, whereby the implements are caused to perform their embroidering operation. According to the embroidery design to be produced on the fabric these implements, as stitching needles, borers (or stiipfels) are spaced apart for the particular repeat determined by the design, for instance, 4/4, 8/4, /4, etc. At 4/4 repeat all implements on the bar, i. e., all needles or all borers, etc. are in use. If the design to be embroidered is such thatfirst one repeat, then another repeat or perhaps a third are used, then when a change is to be made from one repeat to another, it is necessary to remove from the bar alternate needles or borers or alternate groups of needles or borers accord ing to the particular repeat.

With modern embroidering machines which are from 10 to 14 yards long, each bar carries hundreds of such implements and it is quite a tedious work consuming sometimes days toremove or replace the implements in a bar in order to change the repeat. It is, of course, obvious that during such period the machine remains idle. Moreover, when a two or multi-colored design is to be produced, the change from one color to another also consumes considerable time as the threads of one color have to be cut off and removed from the stitching needles and threads of a different color rethreaded.

The object of this invention is to provide a construction whereby these drawbacks will be obviated and whereby it is possible to change the arrangement of the implements for the different desired repeats or colors within but a few minutes, and thereby considerably increase the emciency of the machine and reduce the expense of operation.

Another object is to so mount the different implement bars in the machine that by a single operation the said bars can be alternately brought into and removed from operative position relative to the fabric frame.

The novel construction comprises a polygonal bar either of triangular, square, pentagonal,

hexagonal, octagonal or any other cross section, with means for removably attaching to each face of said bar a row of implements, so that the implements on each face of the bar may in advance be spaced according to the repeats or the '5 colors desired. Thus, the implements projecting from one face of the bar may be spaced for 4/4 repeats, those projecting from another face may be spaced for 8/4 repeats, etc. Only the implements which project from the face directed at a 10 right angle toward the vertically extending tambour frame are in operative position while the implements projecting from the other faces are in inoperative position at that time. This polygonal bar is so mounted in the machine frame 15 that in addition to its horizontal reciprocating movement toward and away from the fabric which it carries out in its performance of the embroidering operation, it also is capable of being turned on its longitudinal axis in order to 20 change the implements of one face to that of another. of said polygonal bars. It will be seen that the change of the implements for a different repeat or different color can thus be accomplished very easily and quickly by a mere rotation of the bar around its longitudinal axis.

Furthermore, in order to avoid the necessity of bodily removing one kind of implement bar and replacing it by another kind, or the necessity of lowering or raising the tambour frame to the 30 level of the operative implements, according to our invention, the different sets of implement bars are additionally so supported and interconnected that through a mere rotary motion one of the implement bars is raised into operative position while 35 the other is lowered and vice versa.

In the accompanying drawing which constitutes part of this specification and in which similar reference characters denote corresponding parts: 40

Fig. 1 is a top plan view of our implement bar supporting device.

Fig. 2 is a sectional side elevation thereof showing the implement bars adjusted for boring operation. 45

Fig. 3 is a similar view showing the implement bars adjusted for stitching operation.

Figure 4 is a section on line 4-4 of Fig. 2.

Fig. 5 is a perspective View of a borer bar, and

Fig. 6 is a detailed top plan view of a part of 50 the needle bar.

Referring more specifically to the drawing, ill and II denote bars for supporting the needles N and borers B respectively, used in performing the embroidering operations. Each bar is of square 55 or other polygonal cross section and provided on each face with a longitudinal row of sockets to hold the implements.

As stated in our copending parent application, the sockets for the needle bar preferably consist of transversely extending and equidistantly arranged grooves, channels or hollows Hl for the engagement of the tail ends of the needles N, the eyeletted ends of which are adapted to project laterally from the respective faces of the bar. Arranged parallel to and adjacent to each groove Ill is a second groove [0 to engage the downwardly projecting flange or bead l2 of a clamping plate l2, one for each needle, which is adapted to extend over the tail end of the needle N when mounted in the groove Ill and which is tightened in position by a screw hold 13 working in a threaded bore Ii] of the bar. This construction enables the spacing of the needles on the several faces of the bar according to the particular repeat desired, as shown in Fig. 6.

'The sockets of the borer (and/orstiipfe'l bar), may, as shcwn,consis't of mere threaded bores I I to engage the threaded tail ends of the borers B,

as shown=in Fig. 5.

Each bar-is formed with two or more cylindrical portions'or journals lfl', ll (Figs. :2 and :3) at their ends or intermediate their ends Ito be-rotatively borne in transversely extending :arms I 4, respectively, fulcrumed at their .arear ends, as

at 1'4, -l5',to brackets 16, 11 respectively. These brackets are fixed to horizontal transversalrods l8, l8 respectively, which are slidably borne in the maohine frame 2F and whichiinwvell known manner are-operated to reciprocate. alternately the needle bar .and b'orerbar toward and away from the ta'mbour frame T. (indicated by dotted lines-in 'FigsHZ and 3) during the embroidering operation.

farm 19,? respectivelyythe lever arm l92being :fulcrumedat I9, andarm 2|! at 20' .in a stationary partiF' ofthe machine frame F. The two armsare operatively connected together by a link .2 l. The arm l9 has anrear extension :IB which may also be sbifurcatedffor the engagement "of a roller orpin 22 'lcarriedzby a bellcrank 23 which may be operated in well known amanner from a driven tcam 124 zadaptedto be controlled either automatically fromra jacquard (not shown) or otherwise.

In operation,zwhenritisdesired .toiuse theboring implements or borers B,itheiarms l4, I5fcarrying the bars I0, H are adjusted by turning them'on the borer bar II will extend .horizontally,*i. ie., perpendicularly :to-ithe tambour frame T, while lthe arm l' liof' the needle bar Elfl will extend at an angle thereto in an upwardly directed and,

therefore, in inoperative'positi'on (Fig.2). After such adjustment the :borer Pbar 1 1 'itselfmay be turned on its longitudinal axis to bring-the row ofborers of the desired :repeat .into'the "horizontal: or operative position.

If according to the design to be'embroidered, a different repeat becomes necessary," the 'borer .bar

ll can be turnedon its longitudinal axis to bring thei'borers -=of the desired repeat into activ position. During the boring operation, the borer bar I I is reciprocated horizontally, sliding in the slot of the forked end of the arm 20.

To change from boring to stitching, the arms l4, l5 are swung in the opposite direction, so that the arm M of the needle bar If! extends perpendicularlyto the tambour frame II, while the arm H: of the borer bar ll extends at an angle thereto in a downwardly directed position (Fig. .3). In this position the needle bar also may be turned on its longitudinal axis to bring the needles of the desired repeat into operative position.

.The bars I0, 1! may be provided at their ends or .any .other suitable points with handles (not shown) whereby they may be conveniently turned on their longitudinal axes.

It will be seen that according to our invention, eachimplement bar is so supported relative to the tambour frame that it is capable of three independent motions,-to wit, the'reciprocatory motion imparted to 'it through cam mechanism controlled from. the jacquard (not shown) for-the performance of the particular embroidering function, the rotary motion around its longitudinal axis for its adjustment "for the desired repeat and finally the implement bars may in unison be turned vertically for the exchange of one kind of implementsfor another.

Various modifications may-bemade in the 0011- I struction without departing from the principle of our invention. We, therefore, do not wish to restrict ourselves to the details described and shown.

What we claim is:

1. Inanem'broidering machine having a vertically disposed tambour frame, a plurality of horizontally supported implement bars for differentfunctions of the embroidering operation and interconnected means engaging saidbars' sothat 1 by a single operation said bars will be arcuately swung to be alternately brought into andout of operative .positionzrelative to said tambour frame.

2; In 'anJembrOidering :machine :according to claim 1 in which saidmeans consist of bifurcated,

change of the different'sets of:implements and means fonso'mountingsaid last named means as to :permit the simultaneous adjustment in.:a vertical direction of the-different bars to alternately" bring :either one (of the latter into operative position relative to :said tambour frame.

.4. In an embroidering machine having a vertically-disposed tambour frame, an implement bar of polygonal cross section bearing on each'face 'sets'of implements 'and reciprocatory means for supporting-said bar so as .to be rotatable around its longitudinal axis for its adjustment according to the set of implements desired'andgmeansfor swinging isaid first named means arcuately into and out of operative position.

MAX LP. NEUBERT. OSKAR MUELLER.

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