US1214525A - Embroidering-machine. - Google Patents

Description

K. EGGART. EMBBOIDERING MACHINE.y APPLICATION FILED ocT. 2. 1915.

1,214,525. Peteneed Feb. 6,1917.

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KARL EGG'ART, 0F AIB/BON, SVJI'IZERLAND, ASSIGNOR TO THE FIRM OF ADOLPH SAUBER, OF ARBON, SWITZERLAND.

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Specification of Letters Patent.

Patented Feb. 6, 1917.

Application filed October 2, 1915. Serial No. 53,675.

To all 107mm t may concern.'

ence being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form apart of this specification.y

This invention relates to means for suspending the fabric frame or work frame in a shuttle embroidering machine, in which the frame is movably supported not only at its ends but at at least one intermediate point, and iexible tension members are provided for the transmission of movement from one support to another 'in suchmanner that the several supports shall have equal movement.L

In such a suspension system eachV flexible member is fastened at one end to the corresponding, vertically moving support and at the other end to a pulley, the rotating motion of which is to be converted into the rectilinear motion of the support. Each verti-I cally movable support must have a vlength proportionate to the extent of movement of the iiexible tension member and each support, particularly each intermediate ysupport, has heretofore had a width determined by the combined width of the three flexible members whichl are found at this point.

Again, the arrangement heretofore employed, involving three tension members alongside one another, has also involved the use of correspondingly broad pulleys at the ends of the frame. By reason of the use of a broad and therefore heavy intermediate Y support and of broad pulleys at the ends there has been a great deal -of dead weight in the suspension system, the inertia and momentum of which have to be overcome in the frequent and rapid reversals of movement` of the fabric frame in the operation of the embroidering machine. The tendency at the present time is to increase the speed of operation of embroidering machines and with such increase the overcoming of inertia and momentum of so much dead weight is a serious disadvantage.

l It is therefore the object of this invention to overcome these disadvantages by reducing I as much as possible the dead weight of the suspension mechanism and in accordance therewith the pulleys, the flexible'tension members Vand supports are combined and arranged as hereinafter described so as to reduce to a minimum the dead weight of the suspension system.

The invention will be more fully explained hereinafter with reference to the accompanyingV drawing in which it is illustrated somewhat diagrammatically and in which,-

Figure 1 is a view in front elevation showing a portion of the frame of an embroidering machine, the fabric frame and the suspension system. Fig-` 2 is a top view of the part shown in Fig. 1. Fig. 3 is a top view of some ofthe parts shown in Fig. 2, other parts being omitted for the sake of clearness. Fig. 4 is a detail view in section on the plane indicated by the'line A, B of- Fig. 1, but on a larger scale, looking inthe direction of the arrows. Fig. 5 is a detail view in section on the plane indicated by the line C, D of Fig. 1, also on a somewhat larger scale, looking in the vdirection of the arrows. Fig. 6 is a view in elevation illustrating a modification to be referred to.

In the drawing the main frame of a shuttle embroidering machine is indicated at 1 and the fabric frame at Q. The latter is capable of movement both horizontally and vertically and is supported, through plane horizontal surfaces, upon rollers 5, 5 at its ends and upon a roller 5 at an intermediate point, the rollers being carried upon vertically movable supports 3, 3 and 4. Movement in a vertical direction is imparted tothe supports 3, 3 and 4 from an automat or jacquard mechanism 16 through the devices about to be described, and horizontal motion is imparted to the fabric frame 2, also from the automat or jacquard mechanism, through devices of any suitable character, not shown herein. Each support 3, 3 may ided in its vertical movement by guide wheels 21 on the main frame, the support 4 being similarly guided by guide wheels 25 on the main frame. The support 3 has secured toit one end of a flexible tension member 13, the other end of which is secured to a pulley v12 supported on the main frame. Another flexible member 14 (por, it might be, an extension of the flexible member is Cil also secured to the pulley 12 and has connected thereto a weight 15 to counterbalance', through the connections hereinafter de.- scribed, the weight of the fabric. frame 2.

An endless flexible tension member 10 passes over and is secured to theb pulley 12 and a wide pulley 6 which is mounted on a memberl 19 of the frame 1. The endless flexible tension member 7 passes over and is secured to the pulley6 and a pulley 8 which is .mounted on. a suitable bracket 23,. the

have a common vertical tangent in the plane of movement ofthe intermediate support 4.

A flexible tension member 17 isl secured to' the pulley 11, passes over the guide pulleyV 18 and is secured to the vertically movable support 3, the: member 17 being led from the under side of the pulley 11 so that although the pulleys 11 and 12,y rotating in the same direction, are mounted on oppositesides of the corresponding supports 3 and 3:', the supports shall move up or down together.

In the construction shown in Fig. 1 of the drawings a counterbalance weight 1'5 is connected to the Ypulley 12 by a flexible. tension member 14, but in the construction shown in Fig. 6 a counterbalance spring is substituted for the weight.l As shown there in, a torsion spring 26 acts upon a lever 27 to which the tension member 14 is connected. The other end of the spring 26 is connected with worm-gearing 28 by means of which the tension of the spring can be regulated.

It will be observed that through the em.

ployment of an endless tension member 7 for .the support 4 the latter can be made narrow and consequently light, while the pulley 6 can also be made appreciably narrower. Moreover, the flexible members 9 and 10 can be arranged in such a way that the parts thereof which lie between the reFr able supports, must be accommodated on .the

pulley 6 in addition .to the tension member Y 7 while only two breadths of tension members must be accommodated on the pulleys 11 and 12. The pulleys' 6, 11 and 12 may therefore be kept narrower than is usually` the case in suspension systems of this type.

The limitation of dead weight to the mini-1 mum, which is effected by the arrangement described, is of material advantage in the operationV of. high speedmachines, reducing considerably, as it does, 'the mass which is to be set in motion at every operation and frequently to be reversed in motion.

I claim as my invention:

1. In an embroidering machine,y the combination of a main frame, a fabric frame, vertically movable end supports and a vertically movable intermediate support, all gui-ded on .the main framev and supporting the fabric frame, pulleys adjacent to the end supports, a flexible connection between each end pulley and the corresponding support, av movable member provided with a curved surface adjacent to the intermediate support, a second movable member also provided with a curved surface mounted on the main frame, said twomembers having a common vertical tangent, a flexible4 connection se,- cured to said two members. and theA intermediate support and endless flexible connections between the end pulleys and said member arranged adjacentthe intermediate support. Y'

2. In an embroidering machine, the combination of a main frame, a fabric frame, vertically movable end supports anda vertically movable intermediate support, all guided on the main frameand supporting the fabric-frame, a pulley adjacent to one of the end supports, a pulley adjacent tothe intermediate support, a driving pulley at the other end, flexible connections between each pulley and the corresponding support, an endless flexible connection between thedriving-pulley and the intermediate pulley, and an endless' flexible connection between the intermediate pulley and the first mentioned endpulley and operated by the intermediate pulley. Y

3. In an embroidering machine, the combination of a main frame, a fabricframe, vertically movable `end supports and a vertically movable .intermediate support, vall guided ony the main frame and supporting the lfabric-frame, a double end pulley adjacent to` one of the end supports, la triple pulley adjacent to the intermediate support, a driving-pulley, a flexible connection from each pulley .to the corresponding support, an endless flexible connection between the intermediate pulleyand the first named pulley, and' an endless flexible connection between the driving pulley-and the intermediate pulley.

4. In an embroidering machine, thercomfV binationf of amain frame, a fabric frame,- vertically movable end supports and a vertically movable intermediate support, all

guided on the main frame and supporting ,/f

port, a guide pulley vertically above the intermediate pulley, an endless flexible eonneotion guided on the intermediate pulley and said guide pulley and secured to the intermediate support, and endless flexible conneotions between the end pulleys .and the intei-mediate pulley.

5. In an embroidering machine, the combination of a main frame, a fabric-frame, vertically movable end supports and a verti- Gally movable intermediate support, all guided on the main frame and supporting the fabric-frame, pulleys adjacent to the sev- Gnvies of this patent may be obtained for eral supports, llexible connections between each pulley and the Corresponding support, endless flexible connections between the several pulleys, driving means for one of the end pulleys, and a counterbalanoe connected to the other oli' the end pulleys.

In testimony that I claim the foregoing as Iny invention, I have signed my name in presence of two subscribing witnesses.

KARL EGGAR'I.

Witnesses:

FRANK DIMMEHE, EMIL MUTZ.

ve cents each, by addressing the Commissioner of Patents, Washington, D. G.

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