US939471A - Embroidering-machine. - Google Patents

Description

J. BRUNNSGHWEILER.

EMBROIDERING MACHINE.

APPLIOATION FILED JUNE 20, 1908.

Patented Nov. 9, 1909.

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EMBROIDEBING MAGHINE.

APPLICATION FILED JUNE 20, 1908.

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UNITED STATES PAT ion.

J'OACHIM BRUNNSGHWEILER, 0F I-IAUPTWIL, SWITZERLAND.

EMBROIDERING-MACHINE.

Specification of Letters Patent.

Patented Nov. a, 1 909.

Application filed. June 20, 1908. Serial No. 439,513.

To all whom it may concern:

Be it known that I, JoAoHIM BRUNN- scHwErLER, a citizen of the Swiss Republic, and resident of Hauptwil, Canton of Thurgau, Switzerland, have invented-new and useful Improvements in Embroidering-Machines, of which the following is. 'a full, clear, and exact specification- The guiding of the fabric frames ofembroidering machines has hitherto been effected as a rule by means of so-called pantographs (storks bills) which are guided or conveyed by the embroiderer along the pattern to be reproduced. It has already been proposed to substitute for this hand device an automatic guiding apparatus for the fabric frame of embroidering machines, based on the principle of the parallelogram of forces by operation both horizontally and vertically. But all attempts in this direction have led to complicated constructions or to constructions where the number of stitches is a small one, so that these devices have no practical use. Indeed, for such automatic guidance of the fabric frame, it is first necessary to take care that any number of stitches can be effected, and this is the main object of my invention. For my apparatus the fabric frame, is combined through the intervention of two feelers with two and only two longitudinal guide bodies longitudinally movable with reference to said feelers, which guide bodies, provided upon their length with alternative elevations and depressions in accordance with the pattern to be embroidered, and corresponding as regards one with the motion of the frame in the vertical direction and as regards the other with the movement of the frame in the lateral direction, form a continuous profile path for the corresponding feelers of the fabric frame, and as their longitudinal motion continues are able to the extent of their elevations and depressions by their combined action to brin about an automatic guiding 'of the fabric frame, true to the pattern.

In the accompanying drawing, Figure 1 is a front view of the apparatus constructed according to my invention for automatically guiding the fabric frames of embroidering machines, only a portion of the fabric frame of an embroidering machine beingv therein represented, Fig. 2 is a partial plan view of the apparatus. Figs. 3 and 4 are views of details. Fig. 5 shows diagrampart of, the frame piece 6 is in consequence of the compensating action of the weight or spring already mentioned kept in engagement with a roller 0 on a cranked lever e which is pivotally mounted at (Z, while the vertical right hand part of the frame piece 6., by the action of a weight m is held in engagement with a roller 7" on a lever h pivoted at g. The levers e and it have each, at their free end, a feeler disk 71 and j re spectively, and with these form the feelers mentioned at .the beginning. The feeler disks 2', j, are in turn in engagement with two guiding bodies 2, the constitution of which is further explained below, and which are attached to two screw spindles 70, Z, placed parallel to each other and ro-tatably mounted,

each of which latter engages by a screw thread on its rear end with a fixed nut n (Figs. 2, 4) and is driven at the other end by toothed wheels 0, which are rotated by means of bevel gearing p and a chain or the like, from the main drive of the machine,

and each of which engages through the intervention of a feather in a longitudinal groove 9 of the spindles, whereby they may be shifted in their longitudinal direction with the aid of the nuts n, and may cause the guide bodies 2, already mentioned, to pass with rotation the related feeler disks 6, j.

As will have been seen from what precedes, the apparatus has two feelers, and only two guide bodies. The one guide body with its related feeler governs the fabric frame as regards the .upward motion, and the other guide body with its related feeler governs the fabric frame as regards its mo tion laterally. By the combined. action of these parts there can be imparted to the fabric frame, on the principle of the parallelogram of forces, a movement in any direction compounded of a vertical and a horizontal one. This movement is exactly suited to the embroidery pattern to be reproduced,

this being effected by the particular form of the guide bodies 2. Each of these bodies 2 is made up of a series of disks 8 arranged upon the screw thread of their own spindle, and each formed to have a helical shape, of which disks one is shown separately in two aspects in Fig. 3, and which are clamped upon the spindle between two nuts 1', Fig. 2. These disks .9 are also furnished on their circumference with elevations and depressions, alternating, which bring about as regards one of the said guide bodies, that lying on the left in Fig. 1, the motion of the fabric frame in the vertical direction, and as regards the other guide body the motion of the fabric frame in the lateral direction, these elevations and depressions being so formed as to correspond as regards radial extent and circumferential length with the embroidery pattern, in such a way that by the combined action of the two guide bodies 2 upon the feeler disks 2', j, the motion required for the reproduction of the pattern of embroidery to be reproduced is imparted to the fabric frame, in the same way as is done in the ordinary embroidering machines with pantograph, except that in the present case the guidance of the fabric frame is effected quite automatically. The guide bodies thus form a continuous profile path for the related feelers, which insures an uninterrupted continuance of the work.

The mode of action of the apparatus is clear from what has been stated above without further explanation. By the rotation of the spindles 72, Z, the guide bodies 2 are at one and the same time caused to rotate upon their axes and to move in the longitudinal direction, so as to execute a screw movement. At the same time, in correspondence with the profile of the profile path, formed by the totality of the circumferences of the disks 8, against which the feeler disks 2', j, are kept pressed, they shift the feeler levers c, h, to a corresponding extent, and these latter transfer this shifting to the frame piece 6, and therewith to the fabric frame, which thereby receives the motion required for the reproduction of the pattern to be embroidered.

The direction of the shifting of the guide bodies 2 is shown by an arrow in Fig. 2. WVhen the guide bodies have reached the end of their stroke on the left hand side, the nuts n, which, as shown in Fig. 4:, are made in two parts for this purpose, are freed from the rear end thread of the spindles, which then can rapidly be returned to their original position.

Fig. 5 shows diagrammatically two coupled embroidering machines between the two fabric frames of which the present apparatus, indicated as a whole by V, is arranged, while upon the outer side of the one fabric frame a pantograph P of the usual kind is added. The apparatus V is so arranged. as to be able under normal conditions to serve to guide both fabric frames.

It remains to be explained how the profile disks 8 which form the guide bodies 2 can be obtained with the correctprofile form. To this end, the same apparatus, for instance, may be used, but so modified that the feeler disks 1', j are replaced by marking pins, and the profile disk .9 by sootcd disks of circular form, and that the fabric frame is coupled to an ordinary pantograph. 1f the fabric frame be shifted by the pantograph in correspondence with the embroidery pattern to be copied, the marking pins which engage between each two disks follow the motion of the fabric frame, and scrape their path of travel on the blackened disks, which under the impulse of the spindles 7e, Z are carried in succession past the marking pins, by removing more or less of the blackening from the edge toward the center thus generating a peripheral line giving on each disk the profile required for the particular pattern to be embroidered, along which the disk is then cut out. For the pantograph required for drawing these profiles, there may serve in the double embroidering machine as shown in Fig. 5 the pantograph P therein drawn. \Vhen the profile has been drawn this pantograph may be put; out of action, and the guidance of the fabric frames be left to the self acting guide mechanism V. It will be understood that the construction of the profile disks for the guide bodies 2 might be carried out in other ways.

In the example shown in the drawing, the guide bodies consist of separate profile disks arranged in a series, so that they can be easily separated, and if required exchanged for other separated disks. It is however clear, without further explanation, that the guide bodies might consist of single blocks, as for instance of wood, furnished on their circumferences with elevations and depressions. The like might also be used for the feeler disks 2', j, feeler rollers, fceler pins, and so on. It is moreover clear that such an arrangement might be applied to any other embroidering machine.

lVhat I claim is:

1. In embroidering machines, the combination with the fabric frame of two feelers in connection with said fabric frame, two and only two longitudinal guide bodies for said feelers, means for holding the feelers against the two guide bodies and means for producing a relative movement between the feelers and the two guide bodies in the longitudinal direction of these latter, said guide bodies being provided upon their length with elevations and depressions in accordance with the pattern to be embroidered and corresponding as regards one with they can shift the corresponding feelers and thereby effect an automatic guidance of the fabric frame 'in accordance with the importance of their respective elevations and depressions, and true to the pattern, substantially as and for the purpose described.

2. In embroidering machines, the combination with the fabric frame of two feelers in connection with said fabric frame, two and only two rotary longitudinal guide bodies for said feelers, means for holding the feelers against the two uide bodies and means for producing a relative movement between the feelers and the two guide bodies in the longitudinal direction of these latter, said guide bodies being composed each of a set of helical disks furnished on their circumference with elevations and depressions in accordance with the pattern to be embroidered, in one uide body for the vertical displacement of the fabric frame and in the other guide body for its horizontal or lateral displacement, so as to form a continuous profile path for the related feelers on the fabric frame, and being arranged to shift on their relative longitudinal motion the corresponding feelers and thereby to effect an automatic guidance of the fabric frame in accordance with the importance of their respective elevations and depressions, and true to the pattern, substantially as and for the purpose described.

- In witness whereof, I have hereunto signed my namein the presence of two subscribing witnesses.

J 0A CHIM BRUNNS CHWEILER.

Witnesses:

Go'r'rL. EHRLE, MARY FALcoNnR.

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