US3072083A

US3072083A - Schiffli type embroidery machine

Info

Publication number: US3072083A
Application number: US18438A
Authority: US
Inventors: Conrad Erich Henry
Original assignee: Individual
Current assignee: Individual
Priority date: 1960-03-29
Filing date: 1960-03-29
Publication date: 1963-01-08
Anticipated expiration: 1980-01-08
Also published as: CH386222A

Description

Jan. 8, 1963 E. H. CONRAD 3,07

SCHIFFLI TYPE EMBROIDERY MACHINE Filed March 29, 1960 3 Sheets-Sheet 1 INVENTOR.

wen/"y (on/"ad #1 0 963 E. H. CONRAD 3,072,083

SCHIFFLI TYPE EMBROIDERY MACHINE Filed March 29. I960 3 Sheets-Sheet 2 mmvron [ht/Hem" (on/"dd A TOR V5) Jan. 8, 1963 E. H. CONRAD SCHIFFLI TYPE EMBROIDERY MACHINE 3 Sheets-Sheet 3 Filed March 29. 1960 Y m. E Wm M m 1. /A e f L 3,W2,@83 Patented Jan. 8, 1963 3,072,083 SCHIFFLE TYPE EMBRfiEDLERY MAQHINE Erich Henry Conrad, 21!) Oakdaie Ave, Teaneck, NJ. lFiied Mar. 29, 1369, Ser. No. 18,438 Claims. (Cl. 112-91) The present invention relates to improvements in automatic Schiflli embroidery machines of the type that are Jacquard-controlled and have a great multiplicity of needles and cooperating shuttles arranged in horizontal rows that are operated in unison to produce embroidered designs. The present invention is one part or aspect of a more comprehensive invention designed to improve the entire operation of such embroidery machines to enable them to operate at greatly increased speeds and with increased stitch accuracy.

More specifically, the present invention is directed to the provision of improved cloth frame structure and mounting and the vertical and horizontal reciprocating mechanisms therefor.

Schifiii embroidery machines of the character described, as heretofore made, were limited with respect to speed of their operation because of the means heretofore employed for the reciprocation of its needles and shuttles; such means producing excessive vibration of the machine, unless limited as to speed of reciprocation. Further, because of the great length of the cloth or fabric support- "mg frames of Schifiii embroidery machines, such frames, as heretofore formed, mounted, and controlled, tended to sway from side to side, as well as to and fro, with reference to the needles, and also to sag at the center. Also, in such machines of the prior art, the frame movement was effected from one end thereof. These characteristics of the cloth frames of the prior art machines frequently caused cloth distortion and likewise militated against their operation at a high speed and also as to accuracy and uniformity of the embroidered stitches.

It is an object of the present invention to provide Schifili embroidery machines of the character described having cloth frames of greater rigidity and providing such frames with increased support along their length, to thereby minimize their vibration and their sagging at the center.

It is another object of the present invention to provide Schiffli embroidery machines of the character described with improved cloth frame moving mechanism that will engage the frame for movement both laterally and vertically at both ends and at a plurality of points intermediate the ends thereof, to thereby enhance the accuracy and uniformity of the frame movement along its entire length and thereby decrease sway and vibration, facilitate the operation of the device at increased speed, and attain accuracy of stitch formation.

it is still another object of the present invention to provide Schiffli embroidery machines of the character described with automatic braking means applicable to the frame at the terminal of each motion thereof, both laterally and vertically, to further minimize sway and vibration in each direction and thereby attain further increase in the accuracy and uniformity of stitch formation.

It is yet another object of the present invention to provide Schifiii embroidery machines of the character described with means limiting sway and vibration of the frame also in a transverse direction.

It is a further object of the present invention to provide a frame drive for embroidery machines of thecharacter described that is capable of operating at a relatively high speed while imparting a minimum of vibration to the frame and with a minimum of noise.

It is a still further object of the present invention to provide Schiffli embroidery machines of the character described which, despite all of the advantages pointed out a above, are of relatively simple construction, of great sturdiness and durability, and may be produced with little, if any, advance in cost.

The foregoing and other objects and advantages of the Schiffli embroidery machine of the present invention will become more readily apparent to those skilled in the art from the embodiment thereof more or less diagrammatically shown in the accompanying drawings, and from the description following. It is to be uuderstood, however, that such embodiment is shown by way of illustration only, to make the principles and practice of the invention more readily comprehensible, and without any intent of limiting the invention to the specific details therein shown.

In the drawings:

FIG. 1 is a more or less diagrammatic end elevation, and partly in section, of one embodiment of a Schifili embroidery apparatus of the present invention;

FIG. 2 is a more or less diagrammatic perspective view, partly broken and foreshortened, of the frame structure and frame control mechanism of the apparatus of the invention;

FIG. 3 is an enlarged, fragmentary view of frame moving and guiding means of the present invention;

FIG. 4 is an enlarged view of a frame-actuating gear and pinion for the apparatus of the invention;

iG. 5 is an enlarged, partly sectional view showing the means for tightening the lateral frame supporting and moving straps;

FIG. 6 is an enlarged perspective view of the frame braking mechanism of the present invention;

FIG. 7 is an end view of the same; and

FIG. 8 is a section taken on line 8--8' of FIG. 3.

Referring now in greater detail to the accompanying drawings, they show, in more or less schematic and foreshortened form, a Schifiii-type embroidery machine including a more or less conventional skeletal frame consisting of a pair of spaced end standards, illustrated at 1% (only one shown), which are connected by a plurality, such as four, of cylindrical tie beams; two vertically spaced tie beams, 12, at the front or needle side of the machine, and two vertically spaced tie beams, 14, at the rear or shuttle side of the machine. The tie beams are supported at a plurality of points intermediate their ends by means of upright supports resting on the ground, in the conventional manner, and, in turn, support, preferably above each of their supports, an upright member, 13 (only one shown).

The drawings show a generally rectangular cloth-supporting frame, designated generally as 2%, consisting of an upper frame member or side, 24, referably formed, for rigidity, with a straight bottom edge portion, and an arcuate top edge portion, 26; both of which edge portions being preferably reinforced by thickening into cylindrical ribs.

The cloth frame 2d comprises, further, side members, 28, formed preferably of H-beams, and a bottom member, 31). The frame 28 is further provided at each of its upper corners with lateral extensions, 32, each formed with a straight horizontal bottom, which is preferably longitudinally grooved, as at 34.

The cloth frame 2d is supported, for vertical reciprocation, from a shaft 36 journalled in standards it and uprights 13 at their upper ends. The shaft 35 carries fixedly thereon, adjacent each of the standards til, and preferably adjacent the exterior sides thereof, a wheel, 38, which is ciperably connected by means of preferably a pair of straps, 4i and 42, to correspondingly located wheels, 44, mounted on a second parallel shaft, 46, journalled into standards 16 below shaft 36. The straps and 42 are each secured by its ends, '1 and 43, respectively, in oppositely facing and overlapping relation, side by side,

to each of a registering pair of wheels, 38 and 44*; each pair of straps being preferably crossed over relative to one another between its associated wheels 35 and 44. The

shafts

36 and 46 are preferably positioned relative to one another so that one of the straps, as 4% is vertically disposed.

The shaft 46 carries a gear wheel, 48, on its end adjacent the automatic control end of the apparatus, which is engaged by a pinion, 50, that is operably connected to such automatic control means.

The vertical strap dil connecting each of the pulley wheel sets 38 and 44 carries secured thereon, by one of its sides, an L-shaped bracket, 52, with its sides in upright position. The other of the sides, 53, of the bracket 52 supports a plurality of concave guide rollers, 55, preferably three in number, with two of them arranged in vertically spaced relation and a third one in laterally spaced relation relative to the first two opposite the space between them, between which rollers is slidably accommodated a rod, 56, that is supported on the standards 10, between laterally-extending projections, 58. The other of the bracket sides 53 supports, at right angles thereto, a wheel as, on which rests the adjacent frame extension 32, by its groove 34. It will be apparent that the wheels 60 support the frame 26 for raising and lowering as a strap 44) is reciprocated upwardly or downwardly by the rotation of

shafts

36 and 46, at the same time permitting the frame to be reciprocated laterally horizontally on wheels oil.

Additional frame-supporting means may be provided on shaft 36, intermediate standards 10, which may serve to maintain a frame 20 in upright position against tilting on its longitudinal axis, as well as prevent its sagging at the center. Such additional frame-supporting means may comprise, a pully wheel, 52, mounted on shaft 36 adjacent a central upright 18 and a cooperating wheel, 64, rotatably mounted on the upright 18 as by the lateral shaft 66. The pulley wheels 62 and 64 may be connected preferably by a pair of straps, 63 and 70, whose ends are connected to the pulley 62 and 64 in oppositely facing and overlapping relation, in the same manner as the straps 4d and 42 are connected to their respective pulley wheels. One of the straps, as 68, is arranged to be disposed in vertical relation and has secured thereto, by one of its sides, an L-shaped bracket, 72, with its sides in upright position, its other side, 73, carrying a plurality of concave guide rollers, 74, two of which are arranged in a vertically spaced row with the third one spaced laterally relative to said roller, opposite the space between them, *between which is received and guided a rod, 78, supported on the upright 18. The bracket side 73 supports a horizontal plate, 3% on which are vertically mounted a plurality of concave guide rollers, 82, between which is held and guided a rod, 84, that carries at each end thereof vertically-extending bracket arms, 86, having curved recesses at their ends, into which fit the ribbed

edges

24 and 26 of the top frame side 22.

It will be apparent that by the construction described above, the frame 29 is firmly and steadily supported at both ends thereof and at a plurality of points intermediate its ends against swaying, sagging, and tilting, and that it is operated for vertical reciprocation at both ends to minimize any lag in movement between the different parts of the frame. It will also be apparent that the vertical reciprocal movement of the frame is effected solely through rotary means to minimize noise and vibration and to make possible maximum speed of operation and stitch accuracy.

The lateral shifting or reciprocation of the frame 2% is effected by a pair of wheels, 88, each mounted on a shaft, 9ft, supported, at right angles to the frame 20, in a suitable bearing provided for the purpose on each of the standards 19;, with the wheel 88 adjacent the automatic drive of the apparatus having an associated gear, 92, that is operatively engaged by a pinion, 94 connected to d the automatic drive of the apparatus, as through the main drive shaft, 95.

The two wheels 33 are inter-connected by a pair of straps, 96 and 98, whose ends are secured to the wheels 88 in oppositely facing and overlapping relation, to dispose the straps in parallel relation to one another, to opposed sides of the wheels. Secured to one of the straps, as the upper one, as, opposite each of the frame sides 28, is a horizontally disposed plate, liltl, carrying on its surface a plurality of concave roller guides, 162, preferably three in number, and arranged in a laterally spaced row of two, with the third one spaced from said row, between which is disposed and held the guide rod, 184, that is fixedly supported in brackets mounted on the uppermost of the front ties 12. The plate 166 has secured thereto an upright plate, res, on which are mounted, in similar arrangement to the concave rollers M2, a plurality of concave guide rollers, 110, between which is guided an upright rod, 112, that is secured to a frame side 28, in spaced parallel relation thereto, as between the forwardly-extending spaced lugs, 1114. The

straps

96 and 98 may be provided at their centers, each with one or more turnbuckles, 116, by means of which they may be tensed to a desired degree.

It will be apparent that as the pinion 94 is rotatably oscillated, the wheels 88 will be oscillatably turned to reciprocate the strap 96, thereby moving the horizontal plates 100 secured thereto and the vertical plate, 1% secured to the horizontal plates 102, which, in turn, engage the upright rods 112 secured to the frame sides 28, to reciprocate the frame Ztl in a lateral direction over the supporting wheels 62; the guide rod 1% serving to steady and snub the

straps

96 and 98 against vibration. It will also be apparent that the lateral shifting of the frame 20 is effected, similarly to the vertical shifting of the frame, at both ends of the frame, and that it is effected entirely by rotary movement to minimize vibration and noise and to make possible maximum accuracy and speed of shifting.

It may here be stated that the one or more of the guide rollers of the several groups of frame-supporting and guiding rollers described above, and preferably the odd one of each group of three, may be adjustably mounted on its supporting plate, so as to make possible to suitably tension said guide rollers against the rods guided between them, as, for instance, to compensate for wear or for any possible variation in the thickness of the rod or in the concavity of the rollers. One form of such adjustable mounting is illustrated in FIG. 8 of the drawing, wherein the guide rollers 1&2 is fitted over a supporting pin that is set into or is integral with a cylindrical stem, 193, in eccentric position relative to the longitudinal center of such stem. The stem 103 is set into an opening, M7, in the supporting plate 100 and is secured therein by a screw, 1139, set into the edge of the plate and engageable against the stem 3103, so that such stem may be rotated in its receiving opening 107 so as to bring the roller mounted over its pin closer to or further away from the row of ther rollers, and then tightened in adjusted position by the set screw 109.

The apparatus of the present invention is provided with means to inhibit the sway of the frame at the end of each lateral movement, in either direction, and, at the same time, also inhibit movement or vibration of the frame in a direction perpendicular to its longitudinal axis. Such sway and vibration-inhibiting means comprise brakes mounted on the apparatus that automatically engage the sides 28 of the frame at the end of each stroke, lateral and vertical or diagonal, to brake frame movement.

For braking purposes, each of the frame sides 28 may have secured thereto, on at least one side face thereof, an upright U-shaped structure, generally'designated as 1219, whose sides are adapted to serve as a braking surface of the frame. Preferably, such U-shaped member 120 may comprise two parts, namely, an angle bar, 122, which is uprightly securable by one leg against a flat outer face of the frame section 28, and the U-shaped member, 124, having legs of unequal height, which is secured by its web over the side of the angle bar 122 lying against the side of the frame section 28, with its shorter leg closest to the other side of the angle bar 122. The two members, 122 and 124, are secured to the frame side 23 in adjustable position relative thereto and relative to one another by means of one or more set screws, 126, passing through elongated slots, 128, formed in the attaching sides of the

members

122 and 124 and engaging in the frame side 28. Adjusting screws, 130, may be set in the shorter leg of the member 124 that may be turned to engage against or Within the outwardly-extending leg of the member 122, to adjust the relative positions of the two members to one another, before being fixedly secured by screws 126.

A backstop for the frame 20 may be provided by means of a horizontal bar, 132, supported by brackets, 134, which are mounted on the lower rear tie 14, in position to hold the bar 132 in substantial abutment with one side of the member 120. Preferably, the backstop bar 132 is provided with a facing, 135, of a resilient material, such as rubber or nylon, to provide a resilient frame-contacting surface.

The braking structure of the invention is mounted on the corresponding forward tie 12 which is provided, preferably, opposite each frame side 28 with preferably a plurality of depending, preferably integrally-formed L-shaped brackets, 136, with their horizontal legs, 138, extending in the direction of the frame 20. The horizontal legs 138 are each formed with bearings, 140, at their free ends, in which is journalled a shaft, 142, on which are mounted, in fixed relation, rocker arms, 144, each of which extends and widens in an upward direction and each of which carries on a vertical surface thereof a pair of equally spaced rollers, 146, and each of which is formed with an opening, 148, through which extends a shaft, 150, that is journalled in the standards and is operatively connected by suitable gears to the main driving shaft 95 that is connected to the automatic control of the apparatus.

The shaft 154 carries thereon cams, 152, each disposed between the pair of spaced rollers 146, on each rocker arm 144, in registering position with the others. The upper inner corners of each rocker arm 144 support a common horizontal brake bar, 154, preferably having a resilient contact surface, 156. The cams 152 are so arranged on the shaft 158 and the shaft is so connected and controlled by the pattern controlling the automatic operation of the apparatus, that such cams will tilt the rocker arms 144 to have the brake bar 154 supported by them engage against the adjacent side of the U-shaped member 120 at the end of each movement of the frame, either laterally or vertically, to snub the frame against lateral or vertical over-ride or sway, with the cooperation of the backstop 132.

This completes the description of the frame-supporting, moving and braking structure of the apparatus of the present invention. It will be readily apparent that such structure is highly effective for its purposes; namely, of providing a steady, firm and rigid support for such frame while in motion and at rest; of providing frame-shifting means that produce minimum vibration and noise and may operate at relatively high speed, and of providing means for inhibiting sway and over-ride of the frame at the end of each movement in any direction, to produce uniformly accurate embroidery stitches.

It may here be stated that, preferably, the

brackets

122 and 124 constituting the U-shaped member 120 may preferably be secured to the frame intermediate the lower pair of fabric-supporting and -moving rollers 166 and that such brackets may be arranged in a manner not to interfere with the mounting or movement of the fabric by having 6 i the roller-supporting shafts, 162, clear the

brackets

122 and 124, laterally, as illustrated, or by spacing the brackets 122 and 124 a distance from one another so that the rollers and the fabric supported by them may be moved freely between the parallel sides of such brackets.

It will be further apparent that numerous modifications and variations in the Schitlii embroidery machines of the present invention may be made by anyone skilled in the art, in accordance with the principles of the invention hereinabove set forth, and without the exercise of any inventive ingenuity. I desire, therefore, to be protected for any and all such modifications and variations that may be made within the spirit of the present invention and scope of the claims hereto appended.

What I claim is:

1. In an embroidering machine having a skeletal frame including a pair of spaced end standards, a main drive mechanism, a fabric frame, said fabric frame including a central section comprising top and side frame sections lying, in substantially a common plane and lateral extensionsat the upper ends of said side frame sections, means supporting said frame for lateral and vertical reciprocation comprising a pair of vertically spaced horizontal shafts each parallel to the plane of said work frame,

' means journalling said shafts for rotation, means operatively connecting one of said shafts to the main drive of said apparatus, means at the opposed ends of said shafts interconnecting said shafts for simultaneous rotation in the same direction, means supporting said frame extensions on said shaft-connecting means in laterally slidable relation to said shaft-connecting means.

2. In an embroidering machine of the character described adapted to be supported on a surface and having driving means associated therewith, a fabric-holding frame including a top and side sections and a lateral extension at the upper portion of each said side section, means supporting said frame for vertical and lateral reciprocation comprising a shaft extending substantially the length of said frame and extensions thereof, means supporting said shaft for rotation in elevated horizontal position relative to the machine supporting surface in substantially parallel relation to the plane of said frame, a wheel secured to said shaft at each end thereof, a second wheel to each side of said frame, means mounting each said second wheel in vertically spaced register with one of said first-named wheels for rotation in the plane of said first-named wheel, means interconnecting each pair of said registering wheels for simultaneous rotation in the same direction, means secured to each said Wheel-interconnecting means supporting one of said frame extensions for lateral reciprocation, means rotatably connecting said shaft to a driving means of said machine, means engaging said frame for lateral reciprocation, said last frameengaging means operatively connected to said driving means.

3. The embroidering machine of claim 2, wherein said means interconnecting each pair of said registering wheels comprises a strap having each end thereof wound around the periphery of one of said Wheels and secured thereto by said end, and said strap is vertically disposed, and wherein said frame-supporting means are secured to each of said straps and include a wheel, and means supporting said wheel for rotation in a plane parallel to said frame, each said frame extension resting on one of said wheels.

4. The embroidering machine of claim 2, wherein said means engaging said frame for lateral reciprocation comprises a wheel adjacent each end of said frame, means supporting each said wheels for rotation, in a plane parallel to said frame, means inter-connecting said wheels for simultaneous rotation in the same direction, means secured on each wheel-interconnecting means, at each end thereof, engaging said frame for free vertical reciprocation.

5. The embroidering machine of claim 4, wherein said means interconnecting said last-named wheels comprises a strap having its ends each wound around the periphery of one of said wheels and secured thereto by said end, said frame-engaging means secured to said strap, and means operatively connecting one of said last-named wheels to said driving means.

6. The embroidering machine of claim 2, wherein the means secured to each said wheel-interconnecting means for supporting a frame extension for lateral reciprocation comprises an upright plate secured to said interconnecting means in perpendicular relation to said frame, said upright member having a wheel mounted thereon for rotation in the plane of said frame, said extension having a horizontal underside having a groove formed therein, extending longitudinally thereof, said groove engaged over said wheel.

7. The embroidering machine of claim 6, wherein a vertical guide post is fixedly secured on said machine adjacent and parallel to said upright member secured to said interconnecting means, and means are provided on said upright member for slidably engaging over said guide post.

8. The embroidering machine of claim 6, wherein a vertical guide post is fixedly secured on said machine, adjacent and parallel to said upright member secured to said interconnecting means, and means are provided on said upright member for slidably engaging over said post, said post-engaging means comprising concave rollers mounted on said upright member to opposed sides of said post, said rollers nesting over said post.

9. The embroidering machine of claim 2, including means supporting said frame at at least one point intermediate its ends for vertical and lateral reciprocation, said supporting means comprising a fixed upright standard, said shaft journalled in said standard and having a wheel secured thereto adjacent said standard, a second wheel supported on said standard for rotation in the plane of said first wheel, means interconnecting said wheels for simultaneous rotation in the same direction, and means mounted on said wheel-interconnecting means engaging said top section of said frame for vertical reciprocation with said interconnecting means and for supporting said frame section in laterally slidable relation.

10. The embroidering machine of claim 9, wherein said means interconnecting said wheels comprises a strap having its ends each wound over one of said wheels and secured thereto by said end, said means engaging said frame comprising a vertical member secured to said strap, a horizontal member supported on said vertical member,

a rod slidably supported on said horizontal member, said I an upright rod mounted on said standard, means on said upright member slidably engaged over said upright rod, a horizontal member supported on said upright member, a rod slidably supported on said horizontal member, said rod having bracket arms at each end secured to said frame top section.

12. The embroidering machine of claim 2, wherein said means engaging said frame for lateral reciprocation comprises a wheel adjacent each end of said frame, means supporting each said wheel for rotation in a plane parallel to said frame, means operatively engaging one of said wheels to said driving means, means interengaging said wheels for simultaneous rotation in the same direction, means secured on said wheel-interconnecting means, at each end thereof, engaging said frame for free vertical reciprocation, said frame-engaging means comprising an upright post secured on a frame side section, an upright member vertically slidably engageable on said upright post, and a horizontal member secured to said upright member and to said interconnecting means.

13. The embroidering machine of claim 12, including a horizontal rod alongside of said wheel interconnecting means, means on said horizontal member slidably engaged over said horizontal rod.

14. In an embroidering machine of the character described, having a main driving shaft and means mounting said main driving shaft for rotary movement, a frame including side sections, means supporting said frame for vertical and lateral movement, means connected to said main driving shaft for moving said frame, means for braking said frame at the end of each vertical and lateral movement, comprising an abutment adjacent at least one of said side framesections to one side thereof, and a movable brake member to the opposed side of said side frame section, said brake member comprising a rocker arm, means supporting said rocker arm for movement into and out of contact with said frame side section, a rotary shaft operatively connected to said main driving shaft, and c0- operating means on said rocker arm and said shaft for moving said rocker arm into and out of contact with said frame side section upon rotation of said main driving shaft for moving said frame.

15. The embroidering machine of claim 14, wherein said rocker arm is formed with an opening therethrough, said shaft extending through said opening, and said cooperating means comprises a pair of pins mounted on said rocker arm, one to each side of said opening, and an eccentric cam mounted on said shaft and engaging said 16. The embroidering machine of claim 14, wherein said cooperating means comprises at least one pin mounted on said rocker arm and an eccentric cam mounted on said shaft engaging against said pin for movement of said rocker arm against said frame side section, and means moving said rocker arm away from said frame side section.

17. The embroidering machine of claim 14, wherein a braking surface is provided on said frame side section engageable by said abutment and said rocker arm, said braking surface comprising a U-shaped member secured by its web portion to an end face of said frame side section, said abutment and said rocker arm engageable against the outer faces of the legs of said U-shaped member.

18. The embroidering machine of claim 17, wherein said U-shaped member is provided with a web portion adjustable in width.

19. The embroidering machine of claim 17, wherein said U-shaped member is provided with a web portion adjustable in width, said adjustable U-shaped member comprising an angle bar secured by one side against the face of said frame side section, said angle bar having a transversely elongated slot in said leg, and a U-shaped member disposed over said leg and outwardly thereof, said U- shaped member having a transversely elongated slot in its web, said angle bar and said U-shaped member releasably secured to said frame side section by means passing through said slots, the leg of said U-shaped member adjacent the other leg of said angle bar having at least one screw set thereinto engageable against said other angle bar leg.

20. In an embroidering machine of the character described, having a main driving shaft and means mounting said main driving shaft for rotary movement about its longitudinal axis, a frame including side sections, means supporting said frame for vertical and lateral movement, means connected to said main driving shaft for moving said frame upon rotation of said main driving shaft, means for braking said frame at the end of each vertical and lateral movement comprising a fixed abutment adjacent at least one of said frame side sections to one side thereof, and a movable brake member to the opposed side of said frame side section, said brake member comprising a plurality of spaced rocker arms, means connecting the free end portions of said rocker arms facing said 9 10 frame side section, means supporting said rocker arms for References Cited in the file of this patent movement to bring said connecting means into and out UNITED STATES PATENTS of contact with said frame side section, a rotary shaft operativeiy connected to said main driving shaft and co- 794,331 Zahn July 1905 operating means on each of said rocker arms and said 5 1,125,881 sfhoenfeld 1915 rotary shaft for moving said rocker arms to flaring their 1,214,525 -t 1917 connecting bar into and out of contact with said frame 2,023,881 Ghllardl 1935 side section upon rotation of said main driving shaft for moving said frame.

Claims

1. IN AN EMBROIDERING MACHINE HAVING A SKELETAL FRAME INCLUDING A PAIR OF SPACED END STANDARDS, A MAIN DRIVE MECHANISM, A FABRIC FRAME, SAID FABRIC FRAME INCLUDING A CENTRAL SECTION COMPRISING TOP AND SIDE FRAME SECTIONS LYING, IN SUBSTANTIALLY A COMMON PLANE AND LATERAL EXTENSIONS AT THE UPPER ENDS OF SAID SIDE FRAME SECTIONS, MEANS SUPPORTING SAID FRAME FOR LATERAL AND VERTICAL RECIPROCATION COMPRISING A PAIR OF VERTICALLY SPACED HORIZONTAL SHAFTS EACH PARALLEL TO THE PLANE OF SAID WORK FRAME, MEANS JOURNALLING SAID SHAFTS FOR ROTATION, MEANS OPERATIVELY CONNECTING ONE OF SAID SHAFTS TO THE MAIN DRIVE OF SAID APPARATUS, MEANS AT THE OPPOSED ENDS OF SAID SHAFTS INTERCONNECTING SAID SHAFTS FOR SIMULTANEOUS ROTATION IN THE SAME DIRECTION, MEANS SUPPORTING SAID FRAME EXTENSIONS ON SAID SHAFT-CONNECTING MEANS IN LATERALLY SLIDABLE RELATION TO SAID SHAFT-CONNECTING MEANS.