US2423092A - Embroidering machine - Google Patents

Description

July 1, 1947. Q 7 2,423,092

- EMBROIDERING MACHINE Filed July 24, 1942 p JflCK LOU/6 FOGE L Patented July 1, 1947 EMBROIDERING MACHINE Jack Louis Fogel, New York, N. Y., assignor, by mesne assignments, to Manhattan Scalloping and Embroidery Works, Inc., New York, N. Y., a corporation of New York Application July 24, 1942, Serial No. 452,153 In Canada May 22, 1942 15 Claims. 1

This invention relates to improvements in embroidering machines in which a tensioned binding thread is wound around filler to form an ornamental cord. In conventional machines of this type the tension under which the binding thread is wound around the filler is maintained at a constant value and the cord produced is of uniform thickness or diameter throughout its length.

The object of the present invention is to provide in an embroidering machine of the type mentioned means for automatically valying the tensioning of the binding thread at regularly recurring intervals during the winding operation to thereby form an ornamental cord of varying thicknesses or diameters throughout its length.

In the present instanc the invention Will be described as applied to the sewing head of a conventional type of embroidering machine which is well known to the trade as a Bonnaz L-type or Universal feed two or three thread cording machine such as the Singer 114W120. The invention is, however, capable of being applied to various other types of embroidering machines which form an ornamental cord by winding a binding thread around a filler. It is tobe understood that filler is used herein in the broad sense of the word, and thus would include the needle or stitching thread, as well as an additional thread used as a filler. The expression two or three thread cording is descriptive of this.

Proceeding now to a more detailed description of this invention, reference will be had to the accompanying drawings in which:

Fig. 1 is a side elevational view of a portion of a sewing head assembly embodying my invention.

Fig. 2 is a side elevational view of the component parts of the winding mechanism by means of which the binding thread is wound around the filler.

Fig. 3 is a sectional view taken along the lines 3-3 of Fig. 2.

Fig. 4 is a bottom plan view of the parts shown in Fig. 3.

Fig. 5 is a view showing the cord as it appears when made in accordance with the conventional method.

Fig. 6 is a view showing the cord as it appears when made in accordance with my invention.

In these drawings I have shown only those component parts of a conventional Bonnaz L-type embroidering machine which are deemed necessary to an understanding of my invention. Such parts comprise a tubular member 5, a filler tube 6, a needle 1, a sleeve 8, a collar 9, a pinion l 0 and a binding thread feed spool l I. The member 5 and feed tube 6 are assembled in a conventional manner for unitary movement and are capable of both vertical and rotary movement with respect to the sleeve 8 which constitutes a stationary part of the sewing head. The rotary movement of the members 5 and 6 is in the nature of an oscillating movement which is efiected by manually operated mechanism which does not enter into the present invention and therefore is not disclosed. The feed tube 6 is eccentrically disposed with reference to the member 5 and encloses a portion of the needle 1 which is reciprocated in a conventional manner during the embroidering operation.

The collar 9 is secured to the pinion l0 and is rotated about the sleeve 8 by means of a drive gear (not shown) engaging said pinion. The

binding thread feed spool l I is revolubly mounted between upper and lower arms l2 and I3, the arm l2 being fastened by a screw 16 to the hori- I zontal portion I5 of a conventional bracket l4 carried by the collar 9. The arm I3 is fastened: to the arm 12 by a conventional tensioning connection ll which is adjustable to move the arms [2 and I3 towards or away from each other to thereby vary the tension controlling braking pressure which these arms exert against the end flanges of the spool H.

The binding thread [8 wound on the spool H is led through guide openings I9 and 28provided adjacent the upper and lower ends of a winding arm 22 which is secured to the collar 9 by fastening means 23 and serves to wind the binding thread around the filler thread 21 as the spool lower flange so that the peripheral edge of the upper flange is eccentric to the central axis of rotation of the spool. During part of each rotation of the spool about its axis braking pressure 1 is applied to the peripheral edge of the spool flange 28 by a spring pressed brake member 40 provided with a flange receiving groove M. This brake member is positioned so that it engages and acts against only that portion of the flange 28 which projects beyond the periphery of the lower flange.

The stem 34 of the brake member 40 is slidably arranged in the bore 33 of a block 30. The block is recessed in the front end and is provided with a curved extension bracket 31, the recess and the bracket being shaped to fit about the collar 9. A bolt 32 projecting through the bracket 3| serves to fasten the block 35) to the collar. A coil spring 35 fitted in the bore 33 and held in place by an adjustable screw plug 36, engages the rear end face of the stem 34 and serves to yieldingly resist retraction of the stem into the bore as the brake 49 engages the flange 28. The stem 34 is grooved as indicated at 3'! to receive a set screw 38 which serves to guide the stem and to prevent rotary displacement. A stop 39 on the end of the stem acts against the screw 38 to retain the stem in the bore 33. A relatively light coil spring 44 arranged about the stem 34 engages between the brake 4-0 and the front end of the block 30 to apply an initial tension to the flange '28.

During the winding operation of the binding thread around the filler, the thread is drawn off the spool under a predetermined constant tension as arranged by the conventional tensioning connection l1. During a part of each revolution of the spool the projecting peripheral edge of the flange 28 is engaged by the brake member 40 which tends to yieldingly resist rotation of the spool. In the initial engagement, the spring 44, exerting a relatively light resistance against retraction of the stem 34, causes th'e brake 43 to gradually slow down the rotation of the spool. A slight stress is thereby placed on the binding thread during the winding operation about the filler and the binding thread Wraps more tightly about the filler in a gradual tapering manner as indicated at 45 in Fig. 6. As the cam portion of the flange 28 forces the stem further into the bore 33, the rear end of the stem contacts the spring 35 which applies a relatively strong resistance to the rotationv of the spool. At this stage the binding thread is bound around a portion of the filler with the maximum degree of tension so that this portion of the cord is made of minimum thickness as indicated at 46. The spring 44 continues to exert its resistance on the waning side of the cam to produce an outward taper from the minimum to the maximum thickness of the cord as indicated at 41 in Fig. 6.

While there has been shown and described but one simple embodiment of the present invention, it is, nevertheless to be understood that the essential mechanical features and the principle of operation might also be exemplified in other structural forms. Accordingly, the privilege is reserved of resorting to all such legitimat variations in form, construction and relative arrangement of the various parts as may fairly be considered within the spirit and scope of the appended claims.

I claim:

1. An embroidering machine of the character described, comprising means for winding a binding thread around a filler to form an ornamental cord, and means including an eccentrically flanged spool from which said binding thread is fed, ,for automatically varying the tensiom'ng of said binding thread during the winding operation whereby the binding thread is wound more tightly around certain portions of the filler as compared with other portions thereof.

2. An embroidering machine of the character described including means for winding a binding thread around a filler and automatically varying the tensioning of the binding thread at regularly recurring intervals during the winding operation, said means comprising a spool from which the binding thread is fed, means mounting said spool for turning movement about its central axis, means for moving said spool in a circular path around the filler, spool engaging means functioning to apply a constant braking pressure to said spool to yieldingly resist rotation of the spool about its axis and to thereby insure th maintenance of a predetermined tension on the binding thread during the winding of the thread about the filler, and additional means arranged to apply a further braking pressure to the spool during a part of each rotation about its axis.

3. An embroidering machine of the character described including means for winding a. binding thread around a filler and automatically varying the tensioning of the binding thread at regularly recurring intervals during the winding operation, said means comprising a spool from which the binding thread is fed, means mounting said spool for turning movement about its central axis, means for moving said spool in a circular path around the filler, and spool engaging means arranged to apply braking pressure to the spool during a part only of each rotation about its axis.

4. An embroidering machine as set forth in claim 3, in which the last mentioned means comprises a flange at one end of said spool, said flange having circular peripheral edge which is eccentric to the central axis of rotation of the spool, and a member arranged to engage and exert braking pressure against the peripheral edge of said flange during a part of each rotation of said flange.

5. An embroidering machine as set forth in claim 3, in which the means to apply a braking pressure during a part only of each rotation of the spool about its axis comprises aflange at one end of said spool, said flange having a cir-- cular peripheral edge which is eccentric to the central axis of rotation of the spool, and a braking means comprising a block, and a brake member slidably mounted in said block, said brake member being adapted to engage the peripheral edge of said flange in braking engagement during a part of each rotation of said flange.

6. An embroidering machine as set forth in claim 3, in which the means to apply a braking pressure during a part only of each rotation of the spool about its axis comprises a flange at one end of said spool, said flange having a circular peripheral edge which is eccentric to the central axis of rotation of the spool. and a braking means comprising a brake block, a brake member slidably mounted in said block, said brake member being adapted to engage the peripheral edge of said flange in braking engagement during a part of each rotation of said flange, and means engageable with said brake member for exerting pressure against retraction of said brake member during its engagement with said flange.

7. An embroidering machine of the character described including means for winding a binding thread. around a filler and automatically varying the tensioning of the binding thread at regularly recurring intervals during the winding operation, said means comprising a spool from which the binding thread is fed, means mounting said spool for turning movement about its central axis, means for moving said spool in a circular path. around the filler, a flange at one end of said spool having a circular peripheral edge which is eccentric to the central axi of rotation of the spool, and a braking means mounted on said last mentioned means and arranged to engage and exert braking pressure against the peripheral edge of said flange during a part only of each rotation of said spool about its axis.

8. An embroidering machine as set foith in claim 7, in which said braking means comprises a block, and a brake member slidably mounted in said block and arranged to engage said flange in braking relation.

9. An embroidering machine as set forth in claim 7, in which said braking means comprises a block secured to said last mentioned means, a

brake member slidably mounted in said block and arranged to engage said flange in braking relation, and means engageable with the brake member for exerting pressure against retraction of the brake member during its engagement with the spool flange.

10. An embroidering machine as set forth in claim 7, in which said braking means comprises a block secured to said last mentioned means, a brake member slidably mounted in said block and arranged to engage said flange in braking relation, and a spring member between said brake member and said block, said spring being adapted to exert a restraining pressure against retraction of said brake member.

11. An embroidering machine as set forth in claim 7, in which said braking means comprises a block secured to said last mentioned means, a brake member slidably mounted in said block and arranged to engage said flange in braking relation, and a plurality of spring members resiliently engaging said brake member against retraction during its engagement with said flange.

12. An embroidering machine of the character described including means for winding a binding thread around a filler and automatically varying the tensioning of the binding thread at regularly recurring intervals during the winding operation, said means comprising a spool from which the binding thread is fed, means mounting said spool for turning movement about its central axis, means for moving said spool in a circular path around the filler, a flange at one end of said spool having a circular peripheral edge which is eccentric to the central axis of rotation of the spool, and a braking means arranged to engage and exert a braking pressure against the peripheral edge of said flange during a part only of each rotation of said spool about its axis, said braking means comprising a block secured to said last mentioned means for moving said spool around said filler, a recess in said block, a brake member slidably mounted in said recess and arranged to engage said flange in braking relation during the rotation of said spool, a spring member about said brake member in engaging relation between the head of the brake member and the side edge of said block,

said spring being adapted to exert a relatively light restraining pressure against retraction of said brake member, and a second spring member in said recess and engageable against the rear of said brake member, said second spring member being adapted to exert a relatively strong restraining pressure against retraction of said brake member during its engagement with said flange.

13. An embroidering machine as set forth in claim 12, including an adjustable screw plug in said recess adapted to vary the pressure exerted by said second mentioned spring member upon said brake member.

14. An embroidering machine as set forth in claim 7, in which the braking means comprises a block secured to the thread winding means, a brake member slidably mounted in said block and arranged to engage the spool flange in braking relation, and a pluralityof spring members resiliently engaging said brake member against retraction during its engagement with the spool flange, and in which one of said spring members is mounted in said block and adapted to engage the rear of the brake member against retraction during its engagement with the spool flange, and an adjustable means mounted in the brake block adapted to vary the pressure exerted by said spring upon the rear of the brake member.

15. An embroidering machine provided with a spool from which a binding thread is fed, means mounting said spool for rotation on its axis, said spool having an eccentrically projecting portion, and braking means engageable with said portion of the spool for applying a braking pressure thereto during a part of each rotation of the spool about its axis.

JACK LOUIS FOGEL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 466,889 Cornely Jan. 12, 1892 1,375,951 Crozet Apr. 26, 1921 1,081,596 Finch Dec. 16, .1913 1,536,579 Groebli May 5, 1925 203,143 Grobli et al Apr, 30, 1878 2,050,790 Goodman Aug. 11, 1936

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