US2616382A - Low inertia presser-mechanism for sewing machines - Google Patents

Description

1952 R. E. JOHNSON 2,616,382

LOW INERTIA PRESSER-MECHANISM FOR SEWING MACHINES Filed May 4, 1950 2 SHEETSSHEET l @E 69 I Q I i 1011: a:

A ALLA;

W 6 INVENTOR.

WITNESS i by Ralph E. Johnson ATTORNEY Nov. 4, 1952 E JOHNSON 2,616,382

LOW INEIRTIA PRESSERMECHANISM FOR SEWING MACHINES Filed May 4, 1950 2 SHEETSSHEET 2 59 g 62-- 4%"? 3%? Pfi i E 73 i 5 74 i "f i l I r INVENTOR. 115 [/6 R phE. Johnson ATTORNEY Patented Nov. 4, 1952 UNITED STATES PATENT OFFICE LOW INE BESSERPM HANEM OB MACHIN S Ralph E. Johnson, Mountainside, N. J., assignor to The Singer Manufacturing Company, Elizabeth, .N- J" a corpor n of Ne Jer ey Ara li a io 'Ma 1950, ial 58.933

19 Claims.

This invention relates to sewing machines and more particularly to presser-mechanisms of the low inertia and low friction type which are adapted for use with very high speed sewing machines.

In order effectively to feed work through a sewing machine it is desirable that the presserdevice, which applies pressure to the work at a point above the feed-dog, be able to respond rapidly to and thereby follow the rising and 2.11- ing movements of the feed-dog and at the same time be capable of readily passing over heme and other obstructions in the material being sewed. This becomes progressively more difiicult of accomplishment as the speed of sewin is increased and. t erefore. ne of t e prima obi ct of the present invention is to provide an improved presser-mechanism, that will be rapid in its action of following the rising and falling movements of the feed-dog, and which will also be able to pass over obstruction in the work.

In order that the presser-device will be able to rapidly follow the rising and falling movements .of the feed-dog and at the same time pass over herns and other obstructions with facility, it is desirable that the load imposed on the feeddog be lightened as much as possible and to this end it is desirable that the moving par-ts of the presser-device be constructed from light weight, low inertia parts and that as much friction as possible be eliminated from the moving parts of the device. Thus, additional objects of the invention are to provide improved presser-devices having a minimum of inertia and to provide presser-devices that impose the least possible amount of frictional resistance to movement of the presser-foot.

It is a further object of the invention to provide a presser-device that will have improved feeding characteristics.

r her advantages attained by the present nvent on will eadil be under od by tho e Ski led in the art from the following description of pre-.- ferred embodiments of the invention taken in connection with the accompanying drawings, in which:

Fig. 1 is a front end elevation, partly in section, of portions of a sewing machine embodying the present invention and showing the head of the sewing machine with the face-plate removed;

Fig. 2 is a plan view taken on the sectional line 22 of Fig. 1;

Fis- .3 an plo ed sp ti e V w o m mbersshown in Figs. 1 and 2;

Fig. 4 is a fragmentary elevational view show- 2 ing the reverse side of portions of the device shown in Fig. 1;

Figs. 5 through 9 illustrate the operation of the invention by progressively showing the movement of the presser-device during normal sewing and as it passes over a seam; and

Fig. 10 illustrates a modified form of presserdevice embodying the present invention.

in the preferred embodiment of the invention illustrated in Figs. 1 through 9, the sewing machine is shown to comprise a hollow head 20 into which projects a conventional horizontal needlebar operating shait 2|, of which the forward end carries a well known take-up crank 22and the customary needle-bar operating crank (not shown), the latter being connected by a link 24 to a vertical reciprocating needle-bar 25, The needle-bar is journaled in bearings 26 and 2! and at its lowermost end carries an eye-pointed needle 28, The sewing machine shownis also equipped with a take-up arm 29 of conventional construction. For further detailed information relating to the above partly described sewin machine, reference may be had to Patent'No. 2,206,285, issued July 2, i940.

In addition to the above, a lower portion of the sewing machine head 29 carries a bearing bushing 3i held to the head 29 by a set screw, not shown. The bushing 31 journals a vertically movable tubular presser-bar 32, of which the lower end carries a presser-device 33, the iatter being held (Fig. 3) to the presser-bar 32 by a screw 34. The upper end of the presser-bar' 32 carries a block 35 which is secured to the presserbar 32 by a set screw 36, or other known means. Thebloch 35 mounts a slack-thread-regulator 31 of construction similar to that shown in Patent No. 2,268,319, issued December 30, 1 941. Mounted upon the presser-bar 32 ior longitudinal slidable movement is a collar 33 having a boss or shoulder 39. 'The boss or shoulder 39 is provided with a screw 4! which pivotally mounts the lower end of a link 42 of which the upper end is apertured by a longitudinally extending slotted hole 43 for receiving one end 44 of an ordinary treadieoperated presser-bar lifter. When the lifter 44 is raised by a treadle, not shown, it raises the collar 38 which engages the block 35, thereby lifting the presser-bar 32 and the presser-device 33.

The n e s r-b 2 may b lifted manuall by moving a conventional lever 46 upwardly about its pivot 41, thereby causing a cam 48 on the lever 45 to engage a lower portion of the shoulder pression spring 51, als housed in the bore 49'.

The lower end of the spring 5,! engages an upper head 58 of a presser-bar plunger 59 slidably positioned in the bore 49. The plunger 59 has a lower head BI, having in its lowermost end a concave recess 62 engaged by the rounded upper end 63 of a floating, rocking lever ball pin 64; of which the diameter is less than the diameter of the bore 49, in which it is partly housed.

The presser-device, indicated generally by the numeral 33, cooperates with a conventional workfeeding mechanism of the lower, four-motion type including a feed-dog 66, carried by a feedbar 61, the feed-dog operating through suitable feed-slots formed in a throat-plate 68 supported by a cloth plate 99. Instrumentalities, not shown, but located below the throat-plate 68 cooperate in a known manner with the-needle 28 to form stitches. The presser-device 33 comprisesa supporting bracket or presser-device body 12 having a split shank l3 held to the presser-bar 32 by the screw 34. An arm 14, lightened by depressions 16, depends backwardly from the shank 13 at an angle of approximately45 degrees. The lower or'free end of the-arm T4 is apertured by a cylindrical hole TI, extending horizontally transverse to the line of feed, for accommodating a cylindrical rocking-lever roller 18, of which the external diameteris less than the internal diameter of the hole H, thereby permitting the roller "18 to roll forwardly in the hole 11 until it engages a front abutment wall formed by the front wall 8| .of the hole 11, and alternately permitting the roller 18 to roll backwardly until itengages a rear abutment wall formed by therear wall 82 of the hole Ti. In other words, lost motion is provided between the stud roller 18 and the body I2. A horizontally extending arm 83, formed integral with the. arm 14, extends forwardlyfrom the free end of the arm 14, andthe forward end of the arm 83 is apertured by a horizontally extending hole 84 parallel to the hole 11, for accommodatin a hinge pin 85, presently to be considered. The roller 18 has a horizontally extend-- ing concentric hole 86 for accommodating a stud or roller pin 87, which pin is supported by passing through a pair of horizontally extending holes 8888 formed in the rear ends of a pair of downwardly-bowed arms 8989, that are formed integral with a crank or rocking-lever 9|. The forward portion of the lever 9| has a knee portion 92 from which depends a leg 93. The upper part of the knee portion is provided with an upwardly open cavity 94 for receiving the lower ball-pointed-end 93 of the pin 64. The pin 64, together with the plunger59 and the spring 51, biases the forward end of the rocking-lever 9| downwardly. The upper portion of the leg 93 is apertured by a horizontally extending hole 91 for accommodating a second hinge pin 98,

The parallel hinge pins, 85 and 98, which are also parallel to thepin 81 and the axis ofthe hole 11, pivotally mount opposite ends of a doubly bifurcated, H-shaped, rocking-lever, or anchorlink 99; the pin 85 passing through a pair of 4 horizontal holes formed in the rear end of the anchor-link 99 and through the hole 84 in the arm 83. The pin 98 passes through a pair of horizontal holes |02-|02 formed in the forward end of the anchor-link 99 and through the hole 91. It will be noted that the rear bifurcated end of the anchor-link 99 straddles the arm 83, while the forward bifurcated endof the anchor-link 99 straddles the lever 9|. It will also be noted that the bifurcated arms 89-89 straddle the presser-device body 12. Reference to the drawings (Fig. 1) shows that the pin 64 acts on the member 9| at a point between the pin 98 and. the vertical projection of the pin on the member 9|, in other words, within the length of an'anchor-link 99.

The pin 81, which is provided at one end with a head and at the other end with an annular groove, is held in place (Figs. 2 and 4) by a notched retainer I03 that is held to the rockinglever 9| by a screw I94 threaded into a hole M6. The hinge pins 85 and 98, which are similar in construction to hinge pin 81, are held in place by a doubly notched retainer |9'! that is held to the rocking-lever-hinge 99 by a screw I08 threaded into a hole I09.

. The lower end of the leg 93 is apertured to receive a screw III which holds a shank N2 of a presser-foot, having a tilting sole-plate'l'l3, to the rocking-lever 9|; thesole-plate ||3 being pivoted to the shank ||2 bya pin 5. An" edgeguide 4, is held (Fig. 4) to the sole-plate |'|3 byascrewlfli. f

From the above it will, be seen that the rocking-lever 9| is free to turn on both of its supports, viz. on the front pin 98 and on the rear pin 81. In addition to this, the movement of the rocking-lever 9|, of which the front end carries the sole-plate I I3, islimited in two different ways by the presser-device body 12. In the first place, the movement of the lever 9| is limited by the' pivotally mounted rocking anchor-link 99 being connected at one end to the body 12 and at the other end to the lever 9|. In the second place, the movement of the lever. 9| is limited by the stud roller 18, that is carried by the rear end of the lever 9|, rolling to alternately engage the front and rear abutments 8| and- 82 formed on the body 12. It should be noted that the first connection between the body 12 and the lever 9| is pivotal in nature, Whereas the second con-. nection between these two parts is a rolling engagement. Thus, sliding engagement, which would of course create considerable friction, is eliminated. v v

Measurement of the forces involved in the presser mechanism of this invention indicates that the presser-foot ||2--||3 is forced downwardly by several times the force thatbears on the roller 18. This places the majorpressure on the presser-foot ||2||3, and 'the minor pressure on the roller 18, thus giving the rocking lever 9|, and the roller 18 optimum freedom of motion with a minimum of friction.

The operation of the presser mechanism, embodying the present invention and illustrated in Figs. 5 through 9, is shown by changes in-position of the various parts of the presser device. Figs. 5 and 6 show themovement'of the parts during normal sewing, ,and 'Figs '7 through 9 show the movement of the parts'as the presserfoot rides over a thickened portion of the work being sewed, for example, while the presser-foot passes over a cross hem 1 formed in a third ply of material H8 added to two original plies H9 and I20 being sewed.

Fig. shows the needle 28 out of the work and shows the feed-dog 6B in the elevated or feeding position. Under these circumstances, the material ll9--l20 is being fed to the left as seen in Fig. 5, and thus the material H9 moves the presser-device slightly backwardly causing the roller 18 to assume a position substantially midway between the front and back abutment walls 8i and 82, and also causing the downwardly spring-biased rocking lever pin 64 to be substantially vertical.

Fig. 6 shows the feed-dog 66 lowered to a position out of engagement with the material l20. Under these circumstances, the downwardly biased rocking lever pin 64 presses downwardly on the lever 9| thus causing the anchor-link 99 to turn slightly in a clockwise direction about the pin 85. This causes the roller 18 to roll a short distance forward, but not far enough for the roller 58 to engage the forward abutment wall 8|. The only time that the roller 18 rolls far enough forward to be stopped by the abutment BI is when the presser-bar 32 is raised by the lifter 46. The forward rolling of the roller 78 also causes the lower end of the pin 64 to move forward out of the vertical position. Fig. 6 also shows the hem H! as approaching the toe of the sole-plate H3.

In Fig. '7, the hem H1 is shown as having passed partly under the sole-plate H3 which, as will be noted, has pivoted counterclockwise about the pin H5. This causes considerable backward and upward thrust on the presser-device and causes the anchor-link 99 to pivot counterclockwise about the pin 85. This in turn causes the roller I8 to roll along the bottom of the hole Tl until it is stopped by engagement with the rear abutment wall 82, and also moves the lower end of the pin 64 backward and upward. Reference to Figs. 5, 8 and '7 shows that the lower end of the presser-bar 32 has, during the above operations, remained at a constant distance D above the cloth-plate 38. In other words, all movement due to feeding and, to this point, all movement due to the hem HI, has been absorbed by the presser-device 33 without elevation of the bar 32, and friction has not materially interfered with these movements because the parts have rolled or pivoted instead of sliding. The rolling of the roller 18 against the rear abutment 82 eliminates hammer blow action.

Fig. 8 shows the situation in which the hem i II has passed to a position beyond the center of the sole-plate H3 and in which the feed-dog 66 is elevated to the feeding position. The combination of the hem l l I under the sole-plate and the raised feed-dog, raises the sole-plate H3 so that the lever 9| is raised to such an extent that a limiting action results from the engagement of the roller 78 with the abutment 82, and from the turning of the anchor-link 99 to a point where it no longer can turn on the pin 85. This produces an upward force which raises the presserdevice body 12 and the presser-bar 32 an additional distance at above the distance D previously discussed. Raising the presser-bar 32 causes increased compression (Fig. 1) of the spring 51. Thus increased resistance and spring pressure are applied to the presser-foot at a time when this is required.

Fig. 9 shows the hem Ill as having passed to a position under the heel of the sole-plate H3. In this condition, the presser-bar 32 has dropped to the distance D above the throat-plate 68.

6.. Attention is called. to the fact that the slack thread regulator 31, which is carried by the block 35, is raised only when the presser-bar 32 is raised. The presser-bar 32 is raised when the roller 13 engages the rear abutment 82 as seen in Fig. 8, and when the lifter lever 46 is operated in a known manner. Thus the slack-threadregulator is not moved during the normal movement of the presser-device as shown in Figs. 5, 6, 7 and 9.

From the above, it will be appreciated that the low inertia parts 9|, 99, H2, H3 and H4 of the present presser-device are the only parts that are moved during normal sewing and that the only time that the parts of higher inertia, for example, the parts 12, 32, and 35 are moved is when a hem, as III, or other high obstruction is encountered by the sole-plate I I3. Also movement of the parts with respect to one another is limited to pivotal or rolling movement. Since these movements are substantially friction free, there is practically no friction loss and no binding of the parts until the limit of movement of the parts is reached at which time further movement of the parts is accomplished as desired. Thus the presser-device can better follow the action of the feed-dog with the result that the sewing machine is provided with improved feeding characteristics. This is especially important during high speed operation. It has been found that the above described presser-mechanism makes it possible to feed two plies of material at high speed, for example, plies H9 and I20, with a minimum of slippage therebetween. In other words, with the presser-device of the present invention, assurance can be had that the top layer H9 will be fed through the sewing machine at the same rate as the lower layer of goods I29 and that stitches of uniform length are produced. In the event that it becomes necessary to disassemble and assemble the presser-device 33, this can be done without disturbing the initial setting of the presser-bar 32.

Fig. 5 shows the pin 65 in a vertical position, whereas, Fig. 6 shows the same pin inclined to the right, and Fig. 7 shows the pin 6 inclined to the left. It will be noted that the amount of movement shown in Fig. 6 is substantially the same as that shown in Fig. *7. This minimizes the movement of the plunger 59 and the spring 5? and minimizes the effect of inertia of these parts.

Fig. 19 illustrates a modified form of presserdevice 33' which is similar to the hereinbefore described presser-device 33. Corresponding parts of the two devices are designated by the same numerals, except that numerals associated with the modified device 33 are primed as for example, I3, Ti, etc., and thus all parts of the device 33' need not be described in detail. The modified device 33 differs from the device 33 principally in that additional clearance space is provided between its parts and the cloth-plate 55. This additional clearance is obtained by having the arm 73 extend horizontally from the shank i3 instead of having it depend at an angle of 45 degrees therefrom. This arrangement places the hole Ti opposite the shank 13' at the same level. Also the arm 83' depends at an angle of about 45 degrees instead of being horizontal. In addition, the arms Elly-89' are bowed upwardly instead of downwardly. In the modified device 33', the rocking anchor-link 99 is made of two separate bars and thus is not H-shaped as is the rocking-lever-hinge 99.

Aside from the above, the two devices 33 and 33' are alike and operate in the same manner to provide a much improved low inertia and low friction type presser-mechanism.

Having thus set forth the nature of the invention, what I claim herein is:

1. A presser-mechanism for sewing machines, comprising, a hollow presser-bar; a support bracket secured to the lower end of said presserbar and having a hole formed therein; an anchor-link pivotally connected to one end of said support bracket; a rocking-lever pivotally connected intermediate its ends to the other end of said anchor-link; a presser-foot carried by one end of said lever; a roller carried by the other end of said lever and located within said hole, the outside diameter of said roller being less than the inside diameter of said cylindrical hole, thereby providing a lost motion connection between said rocking lever and said support bracket; and a compression spring housed in said hollow presser-bar and normally acting on said lever to depress the end of the lever which carries said presser-foot and to urge said lost motion roller to one end of its travel.

2. A presser-mechanism for sewing machines, comprising, a hollow vertically disposed presserbar; a rearwardly disposed angle support bracket secured to the lower end of said presser-bar and having a horizontally extending cylindrical hole formed therethrough; an anchor-link pivoted at the front end of said support bracket; a rocking lever pivoted intermediate its ends to the other end of said anchor-link; a presser-foot carried by the front end of said lever; a roller carried by the rear end of said lever and located within said cylindrical hole, the outside diameter of said roller being less than the inside diameter of said cylindrical hole, thereby providing a lost motion connection between said rocking lever and said support bracket; and a helical compression spring housed in said hollow presser-bar and normally acting on said lever to depress the end of the rocking-lever which carries said presserfoot and to urge said lost motion roller to one end of its travel.

3. A presser-mechanism for sewing machines, comprising, a hollow vertically disposed presserbar; a rearwardly disposed angle support bracket secured to the lower end of said presser-bar and having a horizontally extending cylindrical hole formed therethrough; a doubly bifurcated anchor-link pivoted at the front end of said support bracket; a rocking lever pivoted intermediate its ends to the other end of said anchor-link; a presser-foot carried by the front end of said lever; a bifurcated rear end on said lever; a roller carried by the rear bifurcated end of said lever and located within said cylindrical hole, the outside diameter of said roller being less than the inside diameter of said cylindrical hole, thereby providing a lost motion connection between said rocking lever and said support bracket; and a helical compression spring housed in said hollow presser-bar and normally acting on said lever to depress the end of the rocking-lever which carries said presser-foot and to urge said st motion roller to one end of its travel.

4. A presser-mechanism for sewing machines comprising a presser-bar; a supporting bracket secured to said presser-bar and having an aperture formed therein, an anchor-link pivotally connected to said bracket; a lever pivoted intermediate its ends to said anchor-link; a presserfoot carried by one end of said lever; a rollerstud, of smaller size than the aperture in said supporting bracket, carried by the other end of said lever and located within said aperture, and a spring normally acting on said lever to depress that end of the lever which carries said presserfoot and to urge the stud roller carried by the other end of the lever toward one wall of said aperture.

5. A presser-device for sewing machines comprising a supporting bracket having a cylindrical hole therein; an anchor-link pivoted at one end to said bracket; a lever pivoted intermediate its ends to said anchor link; a presser-foot carried by one end of said lever; a stud roller, of smaller size than said cylindrical hole, carried by the other end of said lever and located in said cylindrical hole; and spring means normally acting on said lever to depress that end of the lever which carries said presser-foot and to urge the stud roller carried by the other end of the lever into contact with the wall of said cylindrical hole.

6. A presser-device for sewing machines comprising a supporting bracket having a hole; an anchor-link pivoted at one end to said bracket; a lever pivoted intermediate its ends to the other end of said anchor-link; a presser-foot carried by one end of said lever; a stud, of a smaller size than said hole, carried by the other end of said lever and located in said hole; and spring means normally acting on said lever to depress that end of the lever which carries said presser-foot and to urge the stud carried by the other end of the lever into contact with one wall of said hole.

7. A presser-device for sewing machines comprising a supporting bracket having a hole; an anchor-link pivoted at one end to said bracket; a lever pivoted intermediate its ends to the other end of said anchor-link; a presser-foot carried by one end of said lever; a stud, of smaller size than said hole, carried by the other end of said lever and located in said hole; and spring means normally acting on said lever to depress that end of the lever which carries said presserfoot and to urge the stud carried by the other end of the lever into contact with one wall of said hole, said spring means acting on said lever at a point closer to where said lever carries said presser-foot than to where said lever carries said stud.

8. A presser-device for sewing machines, comprising, a supporting bracket having spaced abutment walls, an anchor-link pivoted at one end to said bracket; a lever pivoted intermediate its ends to said anchor-link; a presser-foot carried by one end of said lever; a stud, of smaller size than the space between said abutment walls, carried by the other end of said lever and located between said abutment walls; and spring means normally acting on said lever to depress that end of the lever which carries said presserfoot and to urge the stud carried by the other end of the lever into contact with one of said abutment walls.

9. A presser-device for sewing machines, comprising, a presser-bar having a hollow bore; a supporting bracket secured to the lower end of said presser-bar and having spaced abutment walls; an anchor-link pivoted at one end to said bracket; a lever pivoted intermediate its ends to said anchor-link; a presser-foot carried by one end of said lever; a stud, of smaller size than the space between said abutment walls, carried by the other end of said lever and located between said abutment walls; a pin of smaller diameter than saidpresser-bar bore, said pin normally being located coaxially in said hollow presser-bar and engaging said lever; and spring means normally acting on said pin to depress said pin and that end offthe lever which carries said presser-foot and to urge the stud carried by the other end of the lever into contact with one of said abutment walls.

10. A presser-device for sewing machines comprising a supporting bracket; an anchor-link pivoted to said bracket; a lever pivoted intermediate its ends to said anchor link; a presser-foot carried by said lever; a lost motion device connecting said lever and said supporting bracket, said lost motion device comprising an abutment member, and another member adapted to engage said abutment member, one of said members being movable with respect to the other member; and spring means normally acting on said lever to depress the lever and said presser-foot and to urge the lost motion device to one end of its travel.

11. A presser-device for sewing machines, comprising, a supporting bracket having a cylindrical hole therein; a first member pivoted at one end to said bracket; a second member pivoted to said first member; a presser-foot carried by one of said members; a roller-stud of smaller diameter than said cylindrical hole carried by one of said members and located within said cylindrical hole, thereby providing lost motion between said supporting bracket and one of said members, and spring means normally acting on said members to depress said presser-foot and to urge said roller-stud into contact with one surface of said cylindrical hole.

12. A sewing machine for operating upon material including in combination a lower feed-dog for determining the direction of movement of said material through said sewing machine, and a presser mechanism operating on said material and cooperating with said lower feed-dog; said presser mechanism comprising a supporting bracket having a cylindrical hole extending in a direction transverse to the direction of the feed of said material; a first member pivoted at one end of said bracket on an axis that is transverse to the direction of feed; a second member pivoted to said first member on an axis that is transverse to the direction of feed; a presser-foot carried by one of said members; a roller stud of smaller diameter than said cylindrical hole carried by one of said members on an axis that is transverse to the direction of feed, said roller stud being located within said cylindrical hole, thereby providing lost motion between said supporting bracket and one of said members; and spring means normally acting on one of said members to depress said presser-foot and to urge said roller stud into contact with one surface of said cylindrical hole.

13. A presser-device for sewing machines, comprising, a supporting bracket having an opening therein; a first member pivoted to said bracket; a second member pivoted to said first member; a presser-foot carried by one of said members; an abutment element of smaller size than said opening, carried by one of said members and located witihin said opening; and spring means normally acting on said members to depress said presserfoot and to urge said element into contact with one side of said opening.

14. A presser-device for sewing machines, comprising, a supporting bracket having spaced abutment walls; a first member pivoted at one end to .10 said bracket; a second member fulcrumed on said'bracket and pivoted to said first member; a presser-foot carried by one of said membersfia stud, of smaller size than the space between said abutment Walls, carried by one of said members and located between said abutment walls; and spring means normally acting on said members to depress said presser-foot and to urge said stud into contact with one of said abutment walls.

15. A presser-mechanism for sewing machines, comprising, a presser-bar, a presser-foot, an anchor-link connecting said presser-foot to said presser-bar, said anchor-link permitting said presser-foot to have both vertical and horizontal components of movement, a lost-motion connection between said presser-foot and said presserbar, said lost motion connection limiting both the vertical and the horizontal movement of said presser-foot in a constant position of said presser-bar, said lost motion device comprising an abutment member, and another member adapted to engage said abutment member, one of said members being movable with respect to the other member, and a spring biasing said presserfoot to one extreme limit of both its horizontal and vertical movements.

16. A presser-mechanism for sewing machines, comprising, a presser-bar, a presser-foot, a member hinging said presser-foot to said presser-bar, said member permitting said presser-foot to have both vertical and horizontal components of movement, a lost-motion connection between said presser-foot and said presser-bar, said lost motion connection acting in combination with said member to limit both the vertical and the horizontal movements of said presser-foot in a constant position of said presser-bar and said lost motion device comprising a lost motion abutment member, and another lost motion member adapted to engage said lost motion abutment member, one of said lost motion members being movable with respect to the other lost motion member, and a presser-bar-carried spring biasing said presser-foot to one extreme limit of both its horizontal and vertical movements.

17. A presser-mechanism for sewing machines, comprising, a presser-bar having a hole, a presser-foot, an anchor-link member pivotally connected at one end to said presser-foot and pivotally connected at the other end to said presser-bar, said anchor-link member permitting said presser-foot to have both vertical and horizontal components of movement, a roller, of smaller size than said hole carried by said presser-foot and placed in said hole in said presser-bar thereby to form a lost-motion connection between said presser-foot and said presser-bar, said lost motion connection limiting both the vertical and the horizontal movements of said presser-foot in a constant position of said presser-bar, and a spring biasing said presser-foot to one extreme limit of both its horizontal and vertical movement.

18. A material controlling presser mechanism for sewing machines, comprising, an upwardly extending hollow presser bar, a first member movably supported with respect to said bar, a second member fixed to said bar and having a curved surface, a roller carried by said first member and mounted to roll on a portion of said curved surface, a spring pressed plunger housed in said hollow bar and operating to press said roller against said curved surface, and a material engaging presser foot carried by one of said members.

11 12 19. A presser-device for sewing machines, com- REFERENCES CITED prising vertically movable bracket rocking The following references are of record in the lever carried by said bracket for horizontal and file of this patent: vertical movements relatively thereto, a presserfoot carried by said lever, a presser-foot depress- 5 UNITED STATES PATENTS ing spring, and a floating pin endwise interposed Number Name Date between sald Spnng and Sand level" 1,620,249 Corrall et a1 Mar. 8, 1927 RALPH E. JOHNSON.

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