US2684041A

US2684041A - Work holder attachment for sewing machines

Info

Publication number: US2684041A
Application number: US255467A
Authority: US
Inventors: Richard E Tice
Original assignee: TEXAS MACHINE ATTACHMENT COMPA
Current assignee: TEXAS MACHINE ATTACHMENT Co; TEXAS MACHINE ATTACHMENT COMPA
Priority date: 1951-11-08
Filing date: 1951-11-08
Publication date: 1954-07-20
Anticipated expiration: 1971-07-20

Description

July 20, 1954 gc 2,684,041

WORK HOLDER ATTACHMENT FOR SEWING MACHINES Filed Nov. 8, 1951 4 Sheets-Sheet 1 ,FIGJ.

INVEN TOR. RlGl-IARIJ E. TIOE N'TORNEYS July 20,, 1954 R E TICE 2,684,041

WORK HOLDER AJ'ZAQHMENT FOR SEWING MACHINES Filed Nov. 8, 1951. 4 Sheets-Sheet 2 INVENTOR. RIG HARD E. T'IOE wuiimmm ATTORNEYS July 20, 1954 Filed Nov. 8, 1951 R. E. TICE 2,684,041

WORK HOLDER ATTACHMENT FOR SEWING MACHINES fll ssheet s O O O w //oz 4% A24 9 /Z2 IIIIIIII INVENTOR.

IRIGWARW E. TIGE Tmm y 1954 R. E. m5 2,684,041

WORK HOLDER ATTACHMENT FOR SEWING MACHINES Filed Novv 8, 1951 4 Sheets-Sheet 4 INVENTOR.

RICHARD E. TIGE MTTRNE'W Patented July 20, 1954 UNITED STATES PATENT OFFICE WORK HOLDER ATTACHMENT FOR SEWING MACHINES Richard E. Tice, Dallas, Tex., assignor to Texas Machine Attachment Company, a corporation of Texas Application November 8, 1951, Serial No. 255,467

Claims. 1

Thus, it is the primary purpose of this invention to eliminate the possibility of human error and inadvertence on the part of a Sewing machine operator engaged in stitching pockets on garments, forming special designs on garments or other articles or ancillary sewing operations and incidentally to reduce production costs and enable an increase in the rate of production to be realized.

Many articles of apparel, such as jeans, aprons or the like and various other articles made from textile materials are decorated with designs stitched therein. In present practice, it is necessary to expend considerable time and expense inculcating inexperienced sewing machine operators to move a work piece, such as a garment or other article, in the correct path of movement beneath the reciprocating instrumentalities of the sewing machine, so that the design is properly stitched on the work piece. The work piece must be manually turned and controlled so that the proper portion thereof is correctly located for penetration by the sewing instrumentalities.

For example, in forming a horseshoe design on a pair of jeans, as illustrated in Figure 7 of the accompanying drawings, it is necessary to employ at least three operators to form the design on a single garment. And the similarity of the design on a number of garments depends upon the skill of the operators.

In forming the design, one of the operators initially traces the design on the garment. This is conventionally done by sprinkling a powdery substance over a plate, which is laid on the portion of the garment to be designed and it is formed with a cutout portion of horseshoe shape. The next operator positions the garment on the work table of a sewing machine beneath the sewing instrumentalities and manually moves the garment, being guided by the outline of the design on the garment. Considerable skill and experience are required in carrying out this operation, since it is necessary for the completeness and quality of the design that a certain spacing of the stitching and a certain number of stitches per inch be provided. Therefore, the garment must be moved at the proper time with the exercise of considerable dexterity and care so that it is properly positioned beneath the sewing instrumentalities. In the last step in the process of forming the exemplary horseshoe design, the third operator uses a bar tacking machine and bar tacks the open end of the horseshoe design.

It can thus be realized that the process of forming a design on garments or other articles entails the services of several operators, who must be specially trained for their particular task in the operation and who must possess a considerable degree of skill and speed.

With the instant invention, one operator can perform the entire operation, which does not depend upon the skill or speed of the operator but which is automatic and therefore insures uniformity of any particular design on the articles. The purpose of this invention, therefore, is to provide an automatically movable work holder or table, which ascribes a predetermined movement beneath the sewing instrumentalities in accordance and conformance with the outlines of a particular design. The initial tracing of a design on the work piece, the manual moving of the work piece and the subsequent bar tacking are eliminated. An inexperienced operator can turn out designed garments without any possibility of error in the design and with a considerable reduction in time and production costs.

A further object of this invention is to provide a simply constructed, compact and easily movable work holder, which can be attached to a conventional sewing machine, without necessitating modification of the sewing machine, and which can be driven by a direct drive from the conventional gear box on the head of the sewing machine.

Another object of this invention is to provide operating elements which simultaneously reciprocate in rectilinear paths of movement and at right angles to each other, the work holder being supported by the elements in such a manner that it is moved by the compound movement of the operating elements.

A further object of this invention is to provide cams for moving the operating elements, the cams being designed and formed with cam tracks in accordance with the desired path of movement of the work beneath the stationary sewing instrumentalities dependent upon the outline of a particular design.

A still further object of this invention is to provide a means for moving a work holder, so that the path of movement of the work holder 3 is identical with the contour and outline of a particular design.

These and ancillary objects and structural features of merit are attained by this invention, the preferred embodiment of which is set forth in the following description and illustrated in the accompanying drawings, wherein:

Figure l is a front elevational view of conventional sewing machine to which is attached an automatically movable work holder, constructed in according with this invention;

Figure 2 is a perspective view of the work holder or attachment per se;

Fi ure 3 is a top plan view of the operating mechanism for the work holder;

Figure 4 is a longitudinal vertical sectional view taken on line 4-4 of Figure 3;

Figure 5 is an enlarged top plan view of the operating mechanism for the work holder, with parts of the operating elements shown in section to illustrate the guide means thereof;

Figure 6 is a transverse sectional view taken on line 66 of Figure 3;

Figure 7 is a fragmentary enlarged top plan view of the work holder, with a garment clamped thereon and depicting the exemplary design stitched therein;

Figure 8 is a top plan view of one of the cams, which actuates one of the operating elements and illustrating the cam track formed therein especially to produce the horseshoe design;

Figure 9 is a bottom plan view of the companion cam, and,

Figure 10 is a perspective view of the operating elements or slide members.

Referring now more particularly to the accompanying drawings, and initially to Figures 1 and 2, the reference numeral is generally designates a work holder, which includes a fiat plate 2. The plate !2 is adapted to movably overlie the work table is of a conventional sewing machine I6. The plate is formed with a circularcut out portion or opening i8, which is adapted to underlie the reciprocating sewing instrumentalities 26 of the machine and over which a work piece is placed. The work piece is clamped or held in position over the opening [3 by a ring or hoop 22, which possesses an internal diameter substantially equal to the diameter of the opening !8. The hoop 22 is carried at the inner end of an arm 24, which is offset from the hoop and which is provided with laterally extending journals 26, the journals being journaled in upstanding spaced bearing blocks 28, which are mounted on the plate l2 at the beveled edge thereof.

The hoop 22 is spring urged into clamping engagement with the plate l2 so as to securely retain a work piece, with the portion of the work piece to be worked on overlying the opening iii. A coil spring 39 is therefore provided and is vertically disposed between the outer end of the arm 24 and the outer end of the arm 32, the outer end of the arm being oifset from the inner end and underlyingthe arm 24. The spring 3% has its upper end encircled about a lug 34, which depends from the underside of the arm 2a to anchor the spring on the arm 24. The lower end of the spring is encircled on a bolt 36, which is threadingly disposed through the outer end of the arm 32 and which is adjustable to provide means for the convenient removal of the spring 36!.

The plate 12 is supported by upstanding supporting

blocks

38 and 40 which are secured at their upper ends to the underside ofthe'plate it 4 aU its opposing side edges. A base plate 42 supports the

blocks

38 and 40, with the lower ends of the blocks being fixed to the upper surface of the base plate at its opposing ends. The inner end of the arm 32 is affixed by fastening members 44 to the supporting block 38.

The hoop 22 is raised from clamping contact with the table I2 against the urgement of the spring 30 to enable a work piece to be inserted and removed from between the hoop and plate 12 We release mechanism 46. The release mechanism is preferably controlled by a foot pedal (not shown) located for convenient operation by the machine operator. The release mechanism includes a vertically disposed roller 48 which rides on the upper surface of the arm 24 above the spring 30 and which is supported in a vertical plane by a shaft 50. The shaft is journaled in an offset bearing 52 carried by a block 54. An operating rod 56 is vertically disposed through the block for-moving the block in a vertical plane, the rod being moved by a horizontally disposed operating rod 58. The rod 58 is journaled in bearing 60 and is actuated by an operating linkage 82 from the foot pedal.

The operating rod 58 simultaneously controls the release of the work piece from the plate 12 and through a clutch 64 controls the drive shaft 66 for the sewing machine. Also, through a linkage 58, the operating rod effects the lifting and lowering of the sewing instrumentalities 20.

Accordingly,'when the foot pedal is depressed by the machine operator, the arm 2d is moved downwardly on its journals 25 to lift the hoop 22 from contact with the plate l2 and permit the work piece to be withdrawn. Simultaneously,

the sewing instrumentalities or needles 20 are lifted and the clutch is thrown in to interrupt the rotation of the operating shaft 66 for the machine.

The base support plate 42 is movably supported by a housing 10, which is T-shaped and which includes a bottom wall 12, upstanding side walls 'M-andcpposed end walls'lS. A cover or top plate '58 is detaohably mounted on the upper ends of theside and end walls and hanger rods 86 extend upwardly from the top plate and are suitably connected to the underside of the work table 14 of the machine, whereby the housing is suspended from the work table and is mounted in an out of the way position, so as notto interfere with the movements of the machine operator.

A pair of supporting bars 82 and 8d are fixedly mounted in parallelism on the bottom wall 72 of the'housing It, the bars extending longitudinally of the housing and being spaced transversely apart to slidably receive therebetween an operating element or slide plate 86. The plate 86 is fiat and has a depending base portion 88, which extends along the longitudinal center line thereof and is aflixed thereto by fasteners 89.

Rollers 96 are vertically mounted on the inner sides of the supporting

bars

82 and 84 and are arranged in longitudinally spaced fashion on the bars. The rollers $8 engage the underside of the plate 36 at the opposing marginal side edges thereof and cooperate with horizontally disposed rollers 92 .to slidably support the plate in the housing. The rollers e2 are mounted on upstanding shafts 93, which are fixedly mounted in the upper edges of the supporting bars. The rollers 92 engage the opposing side edges of the plate and constrain the plate from lateral movement, the plate being slidably held by the rollers for movement in a rectilinear path longitudinally of th housing. The vertically arranged rollers 96 space the plate out of contact with the bottom wall of the housing and slidably support the plate during its movement between the supporting bars.

A pair of parallel cross bars 94 and 96 are transversely mounted on the plate 86 adjacent the outer end thereof and are spaced apart for the slidable reception of the base plate 42 of the work holder. The base plate 42, as seen in Figure 2, is slidably disposed through elongated slots 98, which are formed in the opposing side walls Id of the housin I0 and are in alignment.

The ends of the cross bars 94 and 96 overlie the

bars

82 and 84 and are, of course, spaced above the bars, as seen in Figure 4. Seats I 00 are formed in the upper edges of the cross bars, above the

bars

82 and 84, and rollers I92 are mounted in the seats and horizontally arranged for engagement with the base plate 42. The opposing side edges of the base plate are formed with longitudinal grooves or tracks I54, within which the rollers I512 are slidably disposed, so that the rollers slidably support the base plate above the slide plate or operating element 86.

The slide plate 86, through th cross bars, which are securely fixed thereto, moves the base plate 42 longitudinally of the housing, as the slide element is rectilinearly reciprocated. Means is provided for simultaneously moving the base plate 42 transversely of the housing and, for this reason, the base plate is slidably supported by the rollers 12. The movement of the base plate s2, transversely of th housing, is produced by a slide plate or operating element I06, which is reciprocated in a rectilinear path of movement, transversely of the housing and at right angles to the path of movement of the slide element 85, which is reciprocated longitudinally of the housing.

The slide plate I06 is formed at its opposing sid edges with longitudinally extending grooves or tracks, which are coextensive in length with the slide plate. Rollers I I0 are disposed in horizontal planes and supported by a supporting plate H2, which extends transversely of the enlarged end of the housing and has its opposing ends fastened by screws M4 to ledges IIEl, which are formed on the inner surfaces of the opposing side wall 14. The rollers IIG, as seen in Figure 4, are spaced above the upper surface of the supporting plate H2 by spacers H8 and are disposed in the grooves I08. An elongated connecting bar I20, which forms an integral part of the operating element I66 to produce the reciproeating motion of the work holder transversely of the housing, is fixed at one end to the slide plate Hit and extends laterally therefrom. The connecting bar I243, is longitudinally disposed in the housing and is provided at its outer or free end I22 with longitudinally extending tracks 52 1, that are formed in the opposing side edges of the bar. The tracks I24 are formed by under cutting the side edges of the bar I26 at the outer end thereof, as seen in Figure 5. Horizontally disposed rollers I26 are mounted on the upper surface of the base plate 42 by means of upstanding shafts I28, the rollers being spaced above the base plate [i2 by spacers I30 concentrically disposed on the shafts. The rollers are disposed in spaced side by side relation and are engaged with the tracks I24, as seen in Figure 3.

Thus, as the slide plate I06 is reciprocated transversely of the housing, the plate being restrained from lateral movement by the rollers III? and being slidably supported thereby, the bar I2Il, which constitutes a lateral extension of the plate IE6, is moved transversely of the housing and moves the base plate 42 transversely of the housing by means of the rollers I 25, which transmit the movement of the bar iii! to the base plate. The rollers and accommodating tracks I24 are provided to enable the base plate to be moved longitudinally of the housing by the slide plate 86, simultaneously with the transverse movement of the base plate.

Thus, a compound movement of the work holder I E! is produced, the work holder being simultaneously reciprocated longitudinally and transversely of the housing.

A'drive shaft 32 is vertically mounted in the housing 14, at the center of the enlarged end thereof, with the lower end of the shaft being disposed in a bearing E34. The bearing I34 is attached to the bottom wall 52 of the housing and supports the shaft, which extends through the removable top wall 78 of th housing and is adapted to be attached directly to the gear box (not shown) customarily mounted on the head of the machine and drivingly connected to the operating shaft 66 therefor.

Of course, other means may be employed for actuating the shaft I32, consisting either of a drive means independent of the shaft 86 or suitable transmission means drivingly connecting the shaft 65 to the drive shaft i232.

A collar E35 is fixedly circumposed on the shaft I32 above the bearing I34 by a radial set screw 38. The collar is formed at its upper end with an annular flange t ll], which seats a cam I 22. The cam M2 is eccentrically mounted on the shaft I32 by means of an off-center opening M4 formed therein and is secured to the flange Mil by a screw ME. The head of the screw is disposed in the counterbore I48 of the bore H50 formed vertically through the cam, adjacent the opening I44, and the shank of the screw is received in a threaded bore i5? formed vertically in the flange. A second or top cam $54 is provided and is fixedly superimposed on the cam M2. The cam 55 i is formed with a vertical opening I56 to receive the shaft I32 and is formed with a vertical opening I58 to receive a connecting screw E66. The opening E58 is elongated and counterbored as at I62 to seat the head of the screw, the screw being disposed in a threaded bore I64 formed in the upper surface of the lower or first cam I42. The opening I58 is elongated, so that the cam I5 i can be adjusted relative to the cam M2, which are fixed together by the screw ifiii so that they rotate in fixed relation.

The cam I42 is formed on its lower face with a cam track [64, within which a cam follower iiiii is disposed, the cam follower H38 being vertically mounted on the inner end of the slide plate or operating element 25. A cam groove I53 is formed in the upper surface of the cam I54 and a cam follower I'Iil is engaged therewith, the cam follower iifl depending from the slide plate I06. In this respect, an elongated axially extending slot I12 is formed in the slide plate 106, so that the plate can reciprocate over the drive shaft I32 and at one end of the slot, a recess PM is formed in the upper face or surface of the plate, the cam follower depending from the wall of the recess and being detachably mounted in the plate. Thus, the recess is provided for supporting the cam follower in a detachable manner, the upper end of the cam follower being threadingly disposed through :-a threaded opening in the wall of the recess portion.

Thus, it can be seen that basically the operation involves the rotation of the drive shaft I32, which rotates the cams I42 and I54. The cam followers I66 and I18 translate the rotary movement of the cams into simultaneous reciprocation of the slide plates or operating elements 86 and I88, which move in rectilinear paths and in right angular planes, the plate 86 moving longitudinally of the housing and the plate I86 :traveling transversely of the housing. The operating element 86 supports the base 43 of the work holding plate I2 by means of the rollers I82 and the operating element I86 is connected to the base by the rollers I26. The plate I2 is moved longitudinally and transversely under the reciprocating needles 28 of the sewing machine, so that the portion of the work piece that overlies the opening I8 in the plate I2 is moved in a sub stantially rotary movement to advance it.

Obviously, the path of movement of the work holding plate i2 and, therefore, the movement of the work piece, as it is penetrated by the needles, depends upon the design of the cam grooves and the relative relation of the cams to each other. The grooves in the cams are formed in conformance with a particular design to be stitched on the work piece.

Considering the exemplary horseshoe design, illustrated in Fig. '7, the work piece must be moved in similar U-shaped paths but in a manner so that the needles form a certain number of stitches per inch and so that the stitches are spaced apart in a predetermined manner. The outer U-shaped line of stitches H6 is concentric to and spaced radially from the inner line of stitches I18 and the end lines I88 and I82 which connect the outer ends of the stitching I16 and H8 are bar tacked. The latter lines of stitching are produced by a conventional bar tacking mechanism (not shown) which actuates the needles 28 to produce the bar tacking, as the work piece moves in a straight line. The actuating mechanism that moves the needles to bar tack the outer ends of the horseshoe design is timed with the movement of the work holding plate I2.

The stitching commences at the point A and the foot pedal of the release mechanism is released by the operator, after the work piece has been placed on the plate I2 over the opening I8.

Upon release of the foot pedal, the spring 38 biases the hoop 22 into clamping engagement with the plate I2 to securely clamp the work piece over the opening IS. The operating shaft 68 is simultaneously rotated, as the clutch is thrown in, thus producingsimultaneous rotation of the shaft I32. The needles 28 are lowered for penetration of the portion of the workpiece within the hoop 22 and the work holder I8 is moved.

The work holder first moves from A to B and the timed mechanism for producing the bar tack ing functions to bar tack from A to B, producing the line of stitching I88. The work holder then moves in an are from B to C, with the needles penetrating the work piece to form the inner stitches I18. From C, the work holder moves in a straight line and the stitches I82 are formed, the bar tacking mechanism being in operation at this time and until the needles reach point D. The work holder is then moved in an are from D to A and the outer line of stitching I16 is produced. When the needles return to the point A,

the machine operator actuates the foot pedal to cut off power to the shaft 66, and consequently 8 theshaft I82 and to raise the needles 28. The thread is then cut and the work piece is removed from the plate I2.

With respect to the cam groove I64, which .is

circumferentially formed on the underside of the first or bottom cam I42, the starting point is located at I84. The cooperating cam follower I66 moves from I84 along the radius I86 as the line of stitching I88 is produced and along the curve I88, as the work piece moves, under the needles from B to C, the follower reaching approximately to the point I88 coincident with the needles arriving at C. The cam follower I66 moves on the radius I98, as the bar tacking I82 is produced to D, whereupon it moves along the section I92 of the cam track, as the line of stitching I16 is formed back to A. The section I94 is provided to produce a back stitching at point A slightly along the line I16.

With respect to the cam groove I68, which is circumferentially formed on the upper face or surface of the second or to cam I54 adjacent the marginal edge thereof, the starting point is at I96. The complementary cam follower I18 is positioned at this point, when the cam follower I66 is located at I84 on the cam groove I64. The cam follower I18 moves along the radius I98, as the cam follower I66 moves along the radius I86, and it moves along the French curve portion 288 of the cam groove I68 as the cam follower I66 moves along the portion I88 of the groove I86. The cam follower I'III is disposed along the radius 282 coincident with the positioning of the cam follower I66 on the radius I98 of the cam track I64 and the follower I18 follows the curve 284 in the cam groove I68, as the follower I66 follows the section I92 of the groove I64. The juncture section 266 between the curve 284 and the starting point I98 corresponds to the section I84 of the cam track I64.

The second cam overlies the first cam in a fixed but adjustable manner and the cams are held against relative movement, so that they rotate together in an integral manner with the radius I98 on the cam track I64 overlying the radius 282. To produce other designs or to stitch a pocket on a garment, different cams will be used, having different cam tracks and being mounted relative to each other in a different manner. But the slide plate, work holder and other elements will remain the same and operate in the same manner, as that disclosed herein. The cams I42 and I54 can be easily replaced with another set of cams by removing the supporting plate H2 and backing the bar I28 off the rollers I26 to remove the plate I86 with the plate H2. The top cam can then be disconnected from the bottom cam and the latter cam can then be removed from the flange I48.

Although the machine has been described as forming a so-called horseshoe design it is to be noted that the symbol of the horseshoe is the exclusive trade-mark property of the assignee, and the words horseshoe design are not to be understood as conveying a descriptive meaning, as the improved device has been developed for the purpose of applying the trade-mark directly to the jeans or other garments manufactured and sold by the assignee.

Thus, this invention is not limited to use only in forming the exemplary design but may be used, .in the afore-described manner, to form other stitched designs and to stitch pockets or collars and the like on garments. Therefore, the invention is not limited to the exact con- .1 e struction shown and described but numerous modifications of the principles of this invention can be developed, within the scope of the appended claims.

Having thus described this invention, what is claimed is:

1. For use with a sewing machine having sewing instrumentalities, means for movably supporting a workpiece beneath the instrumentalities comprising a work holding plate adapted to movably underlie the sewing instrumentalities, a first rectilinearly reciprocating operating element movable longitudinally in a path trans versely of the axis of the plate, cross bars mounted on the operating element in longitudinally spaced fashion, a base member for said work holding plate, means slidably mounting the'base member between the cross bars for forced movement by the operating element and unimpeded movement transversely the operating element, a second reciprocating operating element movable transversely of the path of movement of the first operating element, guide means on the base member connecting the base member to the second operating element and guiding the base member longitudinally on the second operating element as the base member is moved transversely thereby.

2. In a movable work holder for use with a sewing machine in supporting a work piece be neath the reciprocating needles of a sewing machine, a base for said Work holder movable axially and transversely of its axis, a first operating element, means moving said operating element longitudinally and in a path of movement transversely of the axis of the base, supports mounted transversely on the opertaing element, rollers on said supports slidably supporting the base be" tween the supports whereby thebase is moved tranversely of its axis by the operating element and is free to move axially, a second operating element, means moving said second operating element in a path of movement paralleling the axis of the base simultaneously with the movement of the first operating element, a lateral arm on the second operating element and means on the base between which the arm is disposed connecting said second operating element to the base so that the base is entrained for forced axial movement by the second operating element and yet is free to move on the arm under the impetus of the first operating element.

3. In a movable work holder for use with a sewing machine in supporting a work piece beneath the reciprocating needles of a sewing machine, a base for said work holder, a first operating element, means moving said operating element longitudinally and in a rectilinear path of movement, supports mounted transversely on the operating element, means slidably mounting the base between the supports whereby the base is movable with the operating element and simul taneously free to move transversely thereof, a second operating element, means moving said second operating element in a rectilinear path transversely of and simultaneously with the movement of the first operating element and means connecting said second operating element to the base, said last means including a bar extending laterally from the second operating element and overlying the first operating element in parallelism therewith, rollers on the upper surface of the base and spaced apart to receive the free end of said bar and grooves formed in the l9 opposing side edges of the free end of the bar engaging the rollers.

4. The combination of claim 3, wherein said means for moving the first operating element and said means for moving the second operating element includes a pair of superimposed cams, the bottom cam having a cam track formed on its underside, a cam follower engaged with said track and carried by the first operating element and the upper cam having a cam groove formed on its upper side and a cam follower carried by the second operating element and engaged with said cam groove.

5. The combination of claim 4, wherein said cams are fixed on a drive shaft, said second operating element overlying the upper cam and having an elon ated axial slot receiving the drive shaft.

6. The combination of claim 5, wherein a housing is provided for said operating elements and cams, said first operating element moving longitudinally of the housing and said second operating element moving tranversely of the housing, means mounting said operating elements in the housing, said housing having opposed side walls formed with elongated aligned slots receiving the base and means exteriorly of the housing connecting the base to said work holder.

7. In a movable work holder for use with a sewing machine in supporting a work piece beneath the reciproacting needles of a sewing machine, a base plate for said holder simultaneously reoiprocable axially and transversely of its axis, a first operating element reciprocable trans versely of the axis of the base plate, means carried by said first operating element supporting the base plate and attached thereto and operatively connected to said base plate in a manner so that the first operating element and base plate are unitary for movement transversely of the axis of the base plate and the base plate is free to move axially, a second operating element reciprocable in a path paralleling the axial movement of the base plate, and means carried by the second operating element and 0peratively connected to said base plate for translating the reciprocable movement thereof into axial reciprocation of the base plate.

8. The combination of claim 7, wherein said means carried by the first operating element includes companion rollers spaced apart the width of the base plate and engaging in grooves in the side edges of the base plate.

9. The combination of claim '7, wherein said last named means includes a bar extending laterally from the second operating element, rollers on the base plate extending above the upper surface thereof and between which the bar is positioned permitting the base plate to be moved by the first operating element in its path of movement tranversely of its axis.

10. In a movable work holder for use with a sewing machine in supporting a work piece beneath the reciprocating needles of a sewing machine, a base plate for said holder simultaneously reciprocable axially and transversely of its axis, a first operating element reciprocable transversely of the axis of the base plate, means carried by said first operating element supporting the base plate and attached thereto and operatively connected to said base plate in a manner so that the first operating element and base plate are unitary for movement transversely of the axis of the base plate and the base plate is free to move axially, a second operating element reciprocable in a path 11 12 paralleling the axial movement-0f thebase plate, References. Cited in the file of. this patent and means carried by the second operating el'e;- UNITED STATES PATENTS; ment and operatlvely connected to sa1d base plate for translating the reciprocable movement there- Number Name Date of into axial reciprocation of the base plate; a 5 81,710,543 Chum 1907 drive shaft, adjustable superimposed cams se- 2509369 Kramer et sept- 1952 cured on the shaft, cam followers carried by the operating elements engaging said cams.