US1549024A - Sewing machine - Google Patents

Description

Aug. 11, 1925. 1,549,024

w. PEARSON SEWING MACHINE 5.1 g March a, 1922 [E%,g.1..

4 Sheets-Sheet 1 Ewenior: Waller learsow,

+u U W 9 h 4 5 m ma e e h S 4 2 2 9 1 Aug. 11, 1925.

W. PEARSON SEWING MACHINE Filed March 6,

l'iwentar: Wlberfawsom Aug. 11, 1925. 1,549,024

w. PEARSON SEWING MACHINE Filed March 6. 1922 4 Sheets-Shea; 4

, Inventor Walter lcarson,

Patented Aug. 11, 1925.

WALTER PEARSON, OF WHITMAN, MASSACHUSETTS.

SEWING MACHINE.

Application filed March 6, 1922. Serial No. 541,494.

To all whom it may concern:

Be it known that I, WALTER PEARSQN, a citizen of the United States of America, and a resident of WVhitman, in the county of Plymouth and State of Massachusetts, have invented certain new and useful Improve ments in Sewing Machines, of which the following is a specification.

This invention relates to boot and shoe sewing machines and particularly to machines of this character known as McKay stitchers, and has for one of its objects the production of a machine of this character in which the parts will be reduced to a minimum.

Another object of the invention is to provide a simplified machine in which the main actuating elements are enclosed within a casing.

A further object of the invention is the provision of means whereby the loop measuring and stitch measuring devices are simultaneously controlled by the adjustment of a single element.

A further object of the invention is the production of a machine of this class in which the various stitch forming devices and feed mechanisms are all driven from a single cam.

The invention further consists of certain novel features of construction and arrangement of parts which will be understood readily be reference to the description of the drawings and to the claims to be hereinafter given.

For the purpose of illustrating the invention, one preferred form thereof is shown in the drawings, this form having been found to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized, and that the invention is not limited to the precise arrangement and organization of the instrumentalities as herein shown and described, except as required by the scope of the appended claims.

(if the drawings:

Figure 1 represents an elevation of column for supporting the head of a sewing machine embodying the principles of the present invention.

Figure 2 represents an elevation of the head of the sewing machine with the cover plate removed therefrom.

Figure 3 represents a vertical section of the front end of the head, showing the presser foo-t mechanism and loop measuring device.

Figure 4 represents a section of the castoff block online 4, 4 on Figure 2.

Figure 5 represents a transverse section of the head on line 5, 5 on Figure 2.

Figure 6 represent a front elevation of a portion of the head and the mechanism supported thereon.

Figure 7 represents a side elevation of the head showing the means for controlling the stitch and loop measuring devices.

Figure 8 represents a transverse section of the head on line 8, 8 on Figure 2, and

Figure 9 represents a horizontal section of the head on line 9, 9 on Figure 2.

Similar characters indicate like parts throughout the several figures of the drawings.

In the drawings 10 is the base support having mounted in bearings thereon a driving shaft 11 provided with a driving pulley 12.

Extending upwardly from the support 10 and secured thereto is a column 13 having brackets 14, '15 secured to the front face thereof.

The lower bracket 14 has secured thereto, a box 16 in which the supply of thread is positioned. The upper bracket 15 has a bearing 17 in its outer end in which is revolubly mounted the tubular member 18 having a table 19 secured to its upper end on which the usual horn 20 is mounted.

The horn 20 has pivotally connected thereto a thread tension device 21 over the wheel 22 of which the thread passes to the horn 20 from a wax pot 23 secured to the front of the table 19.

The wax pot 23 has an electric heater 24 in the bottom thereof.

The table 19 may be turned manually about the axis of the tubular member 18 when desired.

Revolubly mounted in the tubular member 18 is a tubular shaft 25 to the lower end of which is secured a bevel gear 26 meshing like With a bevel gear 27 on ahorizontal shaft revolubly mounted in a sleeve 28 secured in a support 29 depending from the bracket 15.

The sleeve 28 has clamped thereto an arm 30 having a split bearing 31 in which is clamped a tubular member 32 in which the lower end of the shaft 33 is revolubly mounted.

The shaft 33 has secured therto a bevel gear 34 which meshes wit-h a bevel gear 35 secured to said horizontal shaft through which rotary movement is imparted to the gear 27, and, through the gear 26 and the tubular shaft 25, this rotary movement is transmitted to the devices Within the horn 20 for actuating the whirl, which mechanism and whirl may be of any well known construction.

The thread 25 passes from the thread box 16 to the Wax pot 23 through the tubular shaft 251 As the parts already mentioned form no part of the present invention, they are neither shown nor described in detail.

Secured to the face 37 of the column 13 is a head- 38 in the form of a casing and having atone side a closing plate 39.

Laterally disposed in the head 38 is a revoluble sleeve 40 having mounted slidably thereon a pulley 41 to which rotary movement is imparted through a belt (not shown) from the pulley at the base of column 13.

Within the sleeve 40 is revolubly mounted the shaft 42 having secured thereto the hand wheel 43. The casing 38 has a hub 43* projecting laterally therefrom provided with a plurality of inclined teeth 44 with which engage similar teeth on an oscillating member 45 loosely mounted on the sleeve 40 and having cars 46 carrying a pin 47 by which said member 45 may be connected to any suitable treadle mechanism, whereby the member 45 may be moved about the axis of the shaft 42, thereby causing the pulley 41 to be forced against the hand wheel 43. Both said pulley and hand wheel are provided with friction rings 4-1 which are adapted to form a driving connection when forced into contact with each other.

An anti-friction device 46* surrounds the sleeve 40, between the member 45 and the hub of the pulley 41,- thus permitting said pulley 41 to freely rotate without being frictionally in contact with the end face of the member 45.

When the pulley 4-1 is in contact with the hand wheel 43, rotary movement will be imparted to the latter and also to the shaft 42 on which it is mounted.

The opposite end of the shaft 42 has driven thereon, so as to rotate therewith, a cylindrical cam member 47 X having a pe ripheral cam path 48 and a cam path 49 in. one face thereof.

This cam member 47 also is provided on its periphery with teeth 50 which mesh with a pinion 51 secured to the hub of a bevel gear 52 revolubly mounted on the shank 53 of a member 54 having a bearing for the upper end of the shaft This gear 52 meshes with a gear 55 secured to the shaft and imparts rotary movement thereto and to the parts driven thereby.

The cam member 47 has a stud 56 extending laterally therefrom, through one end of a link 57 the opposite end of which is pivotally connected to the rear end of a rocker lever 58 pivoted at 59 to ears extending upwardly from the front end of an lr-shaped arm 60, the rear end of which is pivotally mounted on a stud 61 fixedly sccured in the casing 38.

The front end of the rocker lever 58 is pivotallyconnected to one end of a link 62, the opposite end of which is pivotally connected to a collar 63 fixedly secured to the needle bar 64 adapted to be reciprocated in bearings 65, 66 provided therefor in the upper and lower walls of the casing 38.

Fixedly secured in the casing 38 is a stud 67 having loosely mounted thereon the hub 68 of a lever 69, the front end of which is pivotally connected to a link 70, the lower end of which is pivotally connected to a collar 71 secured to the pressure foot bar 72.

The hub 68 is threaded and has threaded thereto the nut 73 having a plurality of depressions in one face by which it may be adjusted on said hub.

This nut 73 is cylindrical and is surrounded by the split hub 74- of an arm 75, the outer end of which is connected by a spring 76 to an arm 7.6 pivotally mounted on a short shaft 77 adapted to oscillate in a bearing in an arm 78 pivoted at 79 to the outside of the casing 38. This spring 76 controls the movementof the shaft 77 about its axis and under normal conditions retains the arm 76 in the position indicated in Fig. 3.

This arm 78 has a slot 80 therein through which a stud 81 extends into the casing 38 and limits the movement of said arm 78 about its pivot 79.

When the arm 78 is moved about it pivot 79 the shaft 77 will be raised and lowered in a slot 7 formed in the wall of the casing 38.

The front end of the arm 78 extends over in front of the casing 38 as at 82 and has a forward extension 83 having a cylindrical depression 84- therein in which is mounted a ball 85 having oppositely disposed trunnions extending therefrom which extend through the ears 86 of a linlr 87, the lower end of which is pivotally connected at 88 to an arm 89 pivoted at 90 to a lug on the casing 38. The free end of the arm 89 has pivotally mounted thereon a block 91 adapted to travel in a curved slot 92in a link 93 till the upper end of which is pivotally connected at 94 to the free end of an oscillating lever 95 secured to the front end of an oscillating shaft 96 mounted in bearings in the front Wall of the casing 38 and in a boss 96 extending inwardly from one wall of said casing 38.

The rear end of the shaft 96 has secured thereto a lever 97, the free end of which carries a roller 98 in the cam path 45-. of the cam member 47.

The slotted link 93 is provided with a plurality of indicating characters 100 with which coacts a pointer 101 on the free end of the arm 89.

By moving the arm 89 about pivot 90 and registering the pointer 101 with any predetermined i icating character, the fulcrum 102 of said link 03 will be varied at will.

The lower end 103 of the link 93 is adapted to be conuez'ztcd with the feed mechanism as will he hereinafter described.

The short shaft '27 has liredly secured to its inner end an arm 10 1 projecting toward the front of the casing 38 and this arm has pivotally mounted in its upper i-u-e a block 105 having a cushion of leather 106 secured to its upper face. This member has a concentric slot 10? therein through which extends a holding screw 108. The block 105 is adapted to freely move about its center to var the inclination of iae pad 106as will be hereinafter described.

The hub of the arm 76* has a lug 109 extending forwardly th ,refrom in which is mounted the adjustable screw 110 with its head in contact with the lateral lug 111 on said arm 10 1. Through this connection 109 the action of the spring 7 6 is transmitted to the arm 104.

The split hub T41. is limited in its movement about the axis of the threaded hub 66 by means of the adjusting screw 112. the end of which bears against the fiat upper face 113 thereof.

This split hub 74: is provided with an adjusting screw 11% extending through the ears 115 thereof,- thus providing a means for creating a desired degree of friction between said hub 74.- and the cylindrical. nut 73. v

The lever 60 carrying the rocker lever 56 has a plate 116 clamped to a side face thereof by means of the clamp screw 11'? and this plate has a forward extension 118 adapted to strike the lether cushion 106 which will automatically Ml 'ust itself so that the con-- ta'cting surfaces of the extension 118 and cushion 106 will be parallel. when coming into contact with each other.

The plate 116 has an upwardly extending car 119 in which is mounted an adjusting screw 120, the inner end of which is adapted to bear against the front face of one of the ears 121 of the lever 60 thereby providing a means for adjust-mg said plate 116 about the axis of the clamp screw 11?.

Clamped to the and adapted to be at is an arm 122 hav? which is 11101111" block 123 haviconccntric slot 11: therein through u extends a holding screw 125.

The under face of said block 113 is provided with a leather pad 106 against which the upper face of an car 121 on the lever 60 strikes to limit th ll'itWGlIlQnt thereof in one dircc ion while a pad 106 limits the movn'ient in the other direction. The block 123 will move about the 2 11s when the ear strikes it so that the contacting surfaces will be parallel. A threaded stop member 122 adjustable in the wall of the casing 38 limits the upward movement of the arm 122.

..t is obvious that the positions of the pads 106, 106 determine the stroke of the needle bar 64: and consequently the length of loop drawn from the thread supply by the needle 139. V

The presser foot bar 72 reciprocates in bearings 126, 127 in the walls of casing 38 and its upper end is reduced in diameter usted relatively i a recess in one face in and threaded as at 128 to receive the nuts 129 between which and the upper wall of the casing is a resilient washer 130 to take up any shock during the downward movement of said bar 72. This down ard movement of the bar 72 is imparted by a helical spring 131 surrounding the upper end of the bar '72 between the upper wall of casing 38 and a collar 182 secured to said bar 72 by means of a set screw 133.

Below the collar 182 is the collar 71 securcd thereto by a set screw 135 and pivotally connected to the lower end of the link 70, the upper end of which is pivotally con nected to an arm 69 formed upon the threaded hub 68 as previously described.

Pivoted at 136 to the casing 38 is a manually actuated lever 13? having a finger 138 extending into the interior of the casing and bearing against the under face of the collar T1 on the presser foot bar 72.

By means of this lever 13'? the presser foot may be lifted from the work when it is desired to remove the work from the horn 20 or insert new work thereon.

The lower end of needle bar 6% has a needle 139 secured therein by means of a set screw 14 and one face of said lower end is g1 loved as at 141, and in this groove 1%]. is positioned the lower end of a bar 142 provided with a stripper finger 148 normally contacting with the needle 139 and closing the barb thereof. The upper end of the bar 1 12 has a lateral projection 1 14C projecting into a slot 1 1-2 in a flat member 141-5.

The upper end of the needle bar 6% and also the upper end of the flat member extend through a block 146 secured to the upper wall of easing This block 146 has oppositely disposed recesses therein in each of which is a friction plate 147, 148, the one coacting with the needle bar 64 and the other with the flat member 145. Each plate 147, 148 has a spring 149 forcing said plate into frictional contact with the needle bar 64 or the flat member 145 as the case may be.

Each plate 147, 148 has two screws 150 extending therethrough and through the block 146, each pair of screws also extending I through the out-turned ends of a spring 149,

and on the outer ends of the screws 150 are adjusting nuts 150 bearing against the outer faces of the spring 149. The tension of said spring may be varied by adjusting said nuts.

Between the block 63 on the needle bar 64 and the bar 142 is a spring151 normally forcing said bar 142 downwardly, the lower end of said spring 151 bearing against the projection 144 of the bar 14-2 while the upper end bears against the collar 63 and is anchored in a hole in the flat member 145. This flat member 145 has a slot 152 therethrough into which extends the rear end of the screw 152 which secures said collar 63 to needle bar 64.

The lateral projection 144 in the slot 142 limits the movement of the two members 142. 145 relatively to each other and the end of the screw in the slot 152 limits the movement in opposite directions of the flat member 145.

The lower end of the presser foot bar 72 has formed thereon or secured thereto a block 153, one side of which is provided with a slot 154 in which is mounted the upper forked end of a lever 155, to the lower end of which is pivoted the work feeding member 156 having a work engaging finger 157 secured in the lower end thereof.

The block 153 has a pin 158 projecting across the slot 154 and positioned in the forked end of the lever 155, thereby forming a fulcrum therefor.

The member 156 is connected by a spring 159 at 160 with the lower end of the extension 103 of the curved link 93.

The lower end of the block 153 has an arm 161 extending downwardly toward the needle 139 and has mounted therein the presser foot 162.

Secured to and on opposite sides of the block 153 are two cam plates 164, each having a cam slot 165 formed therein through which extends the pin 166 connecting the lever 155 with the upper end of the work feeding member 156.

This pin 166 is pivotally connected to one end of a link 167, the opposite end of which is pivotally connected at 168 to the extension 103 of the link 93.

lVhen the shaft 96 is rocked by the action of the cam track 48 on' the arm 97 carried by said shaft 96, the lever 95 rocks the arm 93 on the fulcrum formed by the block 91 and the rods 167 thencause the pin 166 to move along the inclined slots 165 thus swinging the work feed 156 forwardly and at the same time downwardly to feed the Work, the length of stroke of the work feed being variable by suitable adjustment of the block 91 in the slot 92. The mounting of the upper part of the work feed by means of a slot and pin 158 (see Fig. 5) permits of the downward movement of the work feed as well as of its pivotal swinging movement. The work feed being mounted on the block 153 carried by the presser foot bar permits of the work feed following the vertical movements of the presser foot bar and of the presser foot 162.

It will be seen that the adjustment given to the block 91 in the curved slot of arm 93 corresponds through the parts 87, 86, 85, 84, 83, 82 and 78, with a corresponding adjustmentof the position of the shaft 77 (see Fig. 7) thus varying the fulcrum of the lever 104 (Fig. carried by the shaft 77. This gives a corresponding adjustment to the end positions of the travel of the pad 106 which moves up and down in conformity with the movement of the block 153 on which the end of the lever 104 rests and therefore follows the movement of the presser foot. The fulcrum 59 of the needle bar operating lever 58 is movable up and down in conformity with the freedom of travel allowed to the lever 60 to which the lever 56 is pivoted, the travel of the lever 60 being limited by the pads 106 and 106", and since the position of the pad 106 has been varied as above stated it is clear that the stroke of the needle bar determines the length of thread drawn, it results from the construction described that the length of stroke of the needle bar, the length of thread drawn and the amplitude of.motion of the work feed are all correspondingly and simulta neously adjusted by the movement of the block 91 in the slot 92.

The upper pad 106 is also adjustable by loosening the clamping screw of the split hub of the arm 122, and turning the arm 122 previous to clamping it in a new position. The screw 122 serves as a limiting abutment to ensure the position of the arm 122, the screw 122 being of course also adjustable.

Between the inner wall of the casing 38 and the cylindrical nut 73 is a lever 170 having a roller 171 on its free end positioned in the cam path 49 of the cam 47.

The opposite end of the lever 170 is provided with a threaded boss 173 mounted upon the threaded hub 68 closely adjacent to the nut 73.

When the lever 170 is moved about the axis of the stud 67 by means of the cam 49, the first action will be to turn the hub 173 upon the threaded hub 68 thereby forcing it into such frictional. contact with the nut 73 and that said nut will be caused to rotate about the axis of said stud 67 during the continuation of the movement of said lever.

As the Said nut is mounted upon the threaded hub 68 of lever 69, it is obvious that the hub 68 will be rotated with said nut 73 thereby causing the outer end of lever 69 to be moved upwardly by the continued movement of the lever 17 O.

The action is as follows :The parts being in the position shown in Figs. 1 and 2, assume that a piece of work of a certain thickness is introduced beneath the presser foot, the bar 7 2 will descend thereon under pressure of spring 131, the link 70 will cause the arm 69 to assume a relative position, the hub 68 turning in the nut 73, the latter being held from revolving by the spring 76 acting on the arm of the collar 74, helding the collar stop 113 against the set screw 112 and the collar gripping the nut 73.-

Thus the presscr foot may adjust itself to the thickness of the work without disturb ance of or hindrance from the nut 73. and the nut 73 retains its position relative to the boss 173 of lever 170, because, in turning. the hub 68 turns equally in the nut and the boss. iVhen the boss 173 is revolved on the hub by the action of cam 17 2 it is screwed against the nut, (the latter having been suit ably adjusted in proximity to the boss 173) and the boss and nut enter into combined action as lock nuts, thus engaging upon and turning the hub 68. The movement of the hub 68 and consequently the lift given to the presser foot from the work is thus the same whatever the thickness of the work. and the presser foot is free to adjust itself automatically to the thickness of the work.

The part 10 1-, being lifted when the presser foot bar rises, puts extra tension on the spring 76 which assists in maintaining the nut 73 and boss 173 locked together as the arm 69 rises to lift the presser bar. Since the work feed is carried by the presser foot it also takes such position as corresponds to the thickness of the work.

When the needle 139 moves downwardly to pierce the work it will move independently of the flat bar until the pin 152 strikes the bottom of slot 152 in said bar when the bar 145 will move with the needle bar 64:. VVhen the needle 139 moves upwardly through the work the loop of thread will be drawn through the work and the barb of the needle will immediately be covered by the member 1 13, said member being lifted by the pin 152 coming into contact with the upper end of the slot 152.

'The member 1 13 covers the barb of needle when in its upper position, thereby preventing anything from catching on the barb and the barb is thus protected until it reaches a lower position where it is desired to cast off the thread.

The presser bar is normally held in contact with the work, irrespective of the thickness of the latter, by the saring 131 and the continued movement of t e lever 170 will cause the presser foot bar 72 to be appropriately lifted by means of the link 70 and at the same time expand the spring 76 and create more tension therein, thus causing a resistance to the movement of the friction nut 73.

This helps to lock the member 73 on the hub 68 and is assisted by means of the extension 174 of the lever 104i bearing upon the upper end of the block 153 at the lower end of the presser foot bar 7 2.

hen the lever 170 returns to its normal position, it will remove the hub 173 thereof from contact with the nut 73 and permit it to be returned to its normal posit-ion by the action of spring 76. The spring 131 will then be free to press down the presser foot onto the work.

It will be noted that nearly all of the operating parts of the head of the machine are enclosed within a casing where they cannot be tampered with or injured. Moreover, by means of the enclosing casing, dust and other foreign substances are prevented from collecting on said movable parts.

Only one cam member is required in this construction in order to actuate the various stitch forming devices and the work feeding device, which devices are actuated by various link mechanisms. Consequently, these various mechanisms will always be properly timed relatively to each other.

By this construction the machine work is reduced to a minimum, thus simplifying the construction and reducing the cost of manufacture.

By adjusting the member 89 the loop measuring mechanisms and stitch measuring mechanism may be controlled simultaneously so that the required loop required for each variation in stitch will always be provided.

It is believed that the operation and many advantages of the invention will be readily understood without further description.

Having thus described my invention, I claim:

1. In a machine of the class described, an oscillating lever; a member pivotally connected at one end to the outer end of said lever; a stitch measuring device connected to the opposite end of said member; a pivoted arm. the free end of which is adjustably connected to said member; a loop measuring device; and actuating means for said loop measuring device connected to said arm.

2. In a machine of the class described, an

l oscillating lever; a member pivotally connected at one end to the outer end of said lever; stitch measuring device connected to the opposite end of said member; a pivoted arm, the free end of which is adj ustably connected to said member; a loop measuring device; and a link between said pivoted arm and said loop measuring device.

In machine of the class described, an oscillating lever: a member pivotally connected atone end to the outer end of said lever; a stitch measuring device; a link between said stitch measuring device and the opposite end of said member; a plvoted arm, thefree end of which is adjustably connected to said member; a loop measuring device; and actuating means for said loop measuring device connected to said arm.

4. In a machine of the class described, an oscillating shaft; a loop measuring device including a controlling lever; an arm secured to said oscillating shaft; a link connected at one end to the free end of said arm and having a slot therein; a stitch measuring device; a connection between the opposite end of said link and the stitch measuring device: a block in said slot having a fulcrum pin extending therefrom; a pivoted arm having at its free end a bearing for said fulcrum pin; and a link from said pivoted arm to said controlling lever.

5. In a machine of the class described, an oscillating shaft; a loop measuring device including a controlling lever having a recess in its forward end; an arm secured to said oscillating shaft; a link connected at one end to the free end of said arm and having a slot therein; a stitch measuring device; a

connection between the opposite end of said link and the stitch measuring device; a block in said slot having a fulcrum pin extending therefrom; a pivoted arm having at its free end a bearing for said fulcrum pin; a link from said pivoted arm to said controlling lever having ears at its upper end; and a ball in said recess having oppositely disposed trunnions disposed in bearings in said ears.

6. In a machine of the class described, an

.oscillating shaft; aloop measuring device including a controlling lever; an arm secured to said oscillating shaft; a. link connected at one end to the free end of said arm and having a slot therein; a stitch measuring device; a connection between the opposite end of said link and the stitch measuring device; a block in said slot having a fulcrum pin extending therefrom; a pivoted arm having at its free end a bearing for said fulcrum pin; a link from said pivoted arm to said controlling lever; and means for limiting the movement; of said controlling lever.

7'. In a machine of the class described, an

oscillating shaft; a loop measuring device including a controlling lever having a slot therein; a fixed stop member disposed in said slot; an arm secured to said oscillating shaft; a link connected at one end to the free end of said arm and having a slot therein; a stitch measuring device; a connection between the opposite end of said link and the stitch measuring device; a block in the last mentioned slot having a. fulcrum pin extending therefrom; a pivoted arm having at its free end a bearing for said fulcrum pin; and a link from said pivoted arm to said controlling lever.

8. In a machine of the class described, a revoluble cam member; a stud projecting from one end thereof; a pivoted arm having ears at its free end; a rocker lever pivotally mounted in said cars; alink between said stud and one end of said rocker lever; a needle bar; a collar thereon; and a link between said collar and the opposite end of said rocker lever.

9. In a machine of the class described, a rcvoluble cam member; a stud projecting from one end thereof; a pivoted arm having cars at its free end; a rocker lever pivot ally mounted in said cars; a link between said stud and one end of said rocker lever; a needle bar; a collar thereon; a link be tween said collar and the opposite end of aid rocker lever and means for limiting the movement of said rocker lever about its pivot.

10. In a machine of the class described, a revolub e cammember; a stud projecting from one end thereof; a pivoted arm having ears at its free end; a rocker lever pivotally mounted in said ears; a link between said stud and one end of said rocker lever; a needle bar; a collar thereon; a link be tween said collar and the opposite end of said rocker lever; and spring controlled means for limiting the movement of said rocker lever about its pivot.

11. In a machine of the class described: a revoluble cam member; a stud projecting therefrom; a pivoted arm having cars at its free end; a rocker lever pivotally mounted in said cars; a link between said stud and one end of said rocker lever; a needle bar; a collar thereon; a link between the opposite end of said rocker lever and said co lar; an oscillating shaft; a lever secured thereto; a resilient pad on the free end of said lever; and an extension on said arm adapted to contact with said pad to limit the movement of said arm in one direction about its pivot.

12. In a machine of the class described, a revoluble cam member; a stud projecting therefrom; a pivoted arm having cars at its free end; a rocker lever pivotally mounted in said ears; a link between said stud and one end of said rocker lever; a needle bar; a collar thereon; a link between the opposite end of said rocker lever and said collar; an oscillating shaft; a spring for controlling the oscillation of said shaft; a lever secured to said oscillating shaft; a resilient pad on the free end of said lever; and an extension on said arm adapted to contact with said pad to limit the movement of said arm in one direction about its pivot.

13. In a machine of the class described a revoluble cam member; a stud projecting therefrom; a pivoted arm having ears at its free end; a rocker lever pivotally mounted in said ears; a link between said stud and one end of said rocker lever; a needle bar; a collar thereon; a link between the opposite end of said rocker lever and said collar; an oscillating shaft; a lever secured thereto; a resilient pad on the free end of said lever; and an extension adjustably mounted on said arm adapted to contact with said pad to limit the movement of said arm in one direction about its pivot.

14. In a machine of the class described, a revoluble cam member; a stud projecting therefrom; a pivoted arm having cars at its free end; a rocker lever pivotally mounted in said cars; a link between said stud and one end of said rocker lever; a needle bar; a collar thereon; a link between the opposite end of said rocker lever and said collar; an oscillating shaft; a lever secured thereto; a block adjustably mounted in a depression in the side of said lever; a resilient pad on said block; and an extension on said arm adapted to contact withsaid pad to limit the movement of said arm in one direction about its pivot.

In machine of the class described, a revoluble cam member; a stud projecting therefrom; a pivoted arm having ears at its free end; a rocker lever pivotally mounted in said cars; a link between said stud and one end of said rocker lever; a needle bar; a collar thereon; a link between the opposite end of said rocker lever and said collar; an oscillating shaft; a lever secured thereto having a lug on one side thereof; a resilient pad on the free end of said lever; an extension on said arm adapted to contact with said pad to limit the movement of said arm in one direction about its plvot; an arm loosely mounted on said oscillating shaft and provided with an ear on its hub; an adjusting screw in said ear coacting with said lug; and a spring controlling the movement of said loosely mounted arm about the axis of said shaft.

16. In a machine of the class described, a revoluble cam member; a stud projecting from an end face thereof; a pivoted arm having ears at its free end; a rocker lever pivotally mounted in said ears; a link be tween said stud and one end of said rocker lever; a needle bar; a collar thereon; a link between the opposite end of said rocker lever and said collar; and adjustable means coacting with one of said ears for limiting the upward movement of said pivoted arm.

17. In a machine of the class described, a revoluble cam; a fixed stud; a threaded hub loosely mounted thereon and having a radial arm: a presser foot bar; a collar thereon a link between said arm and collar; a cylindrical nut threaded to said hub; a cam lever having a boss threaded to said hub and adapted to be moved into frictional contact with said nut; a friction collar surrounding said nut and having an arm extending therefrom; means for regulating the friction between said collar and nut; 21 pivoted arm having ears at its free end; a rocker lever pivotally mounted in said cars; a stud on one face of the cam; a link between said stud and one end of said lever; a needle bar; a collar thereon; a link between the opposite end of said lever and said collar; a block on said presser foot; an oscillating shaft; an arm secured thereto and resting on said presser foot block; means on said arm for limiting the movement of said rocker lever in one direction; and a spring attached to the arm of said friction collar and controlling the movement of the arm on said oscillating shaft.

18. In a machine of the class described. a revoluble cam: a fixed stud: a threaded hub loosely mounted thereon andhavhfg a radial arm; a presser foot bar; a collar thereon: a link between said arm and collar; a cylindrical nut threaded to said hub; a cam lever having a boss threaded to said hub and adapted to be moved into frictional contact with said nut: a friction collar surrounding said nut and having an arm 6X- tending therefrom means for regulating the friction between said collar and nut; a pivoted arm havingears at its free end: a rocker lever pivotally mounted in said ears; a stud on one face of the cam: a link between said stud and one end of said lever: a needle bar; a collar thereon; a link be tween the opposite end of said lever and said collar: a block on saidrpresser foot; an oscillating shaft: an arm secured thereto and resting on said presser foot block; adjustable means on said arm for limiting the movement of said rocker lever'in one direction; and a spring attached to the arm of said friction collar and controlling the movement of the arm. on said oscillating shaft.

19. In a machine of the class described; an oscillating lever; a. slotted member pivotally connected at one end. to the outer end of said lever; a stitch measuring device con nected' to the opposite end of said member;

a pivoted arm; a fulcrum block in the slot of said member pivotally connected to the free end of said arm; a loop measuring device: and actuating means for said loop measuring device connected to said arm.

20. In a machine of the class described, an oscillating lever: a member pivotally connected at one end to the outer end of said lever: a movable fulcrum for said member; a stitch measuring device connected to the opposite end of said lever; a loop measuring device; and means for simultaneously adjusting said loop measuring device and moving said fulcrum.

21. In a machine of the class described; an oscillating lever; a member pivotally connected at one end to the outer end of said lever: a movable fulcrum for said member: a stitch measuring device connected to the opposite end of said lever; a loop measuring device: and a single movable element adapted in its movement to adjust said loop measuring device and. move said fulcrum.

22. A machine of the described provided with means for simultaneously regu lating a device determining the stroke of the needle bar and consequently the length of loop and also the work feeding device, said means including an oscillating shaft: an arm secured to said oscillating shaft: a link conected at one end to the free end of said arm and having a slot therein; a connection between the opposite end of said link and the work feeding device; a block in said slot having a fulcrum pin extending therefrom: a pivoted arm having at its free end a bearing for said fulcrum pin: and a link from said arm to a lever controlling the stroke of the needle bar.

23. A machine of the class described provided with means for simultaneously regulating a device determining the stroke of the needle bar and consequently the length of loop and also the work feeding device, said means including an oscillating shaft; an arm secured to said oscillating shaft: a link connected at one end to the free end of said arm and having a slot therein; a connection between the opposite end of said link and the work feeding device: a block in said slot having a fulcrum pin extending therefrom: a pivoted arm having at its free end a. bearing for said fulcrum pin; a link from said arm to a lever controlling the stroke of the needle bar and means for limiting the movement of said controlling lever.

24. In a machine of the class described, an oscillating lever: a member pivotally connected at one end to the outer end of said lever and having a curved slot therein; a fulcrum block for said member movable in said slot; a loop measuring device; a pivoted arm for adjusting said loop measuring device and moving said fulcrum along said slot; and a stitch measuring device connected to the outer end of said member.

25. A machine of the class described provided with means for simultaneously regulating a device determining the stroke of the needle bar and consequently the length of loop and also the work feeding device; said means including an oscillating shaft; an arm secured to said oscillating shaft; a link connected at one end to the free end of said arm and having a slot therein; a connection between the opposite end of said link and the work feedingdevice: a block in said slot having a fulcrum pin extending therefrom; a pivoted arm having at its free end a bearing for said fulcrum pin: a link from said pivoted arm having ears at its upper end: a lever for controlling the stroke of the needle bar having a recess in its free end: a hall in said recess having oppositely disposed trunnions in hearings in said ears; and indicating characters on said slotted link coacting with said pointer.

26. In a machine of the class described. a needle bar: means including a pivoted arm for regulating the stroke of the needle bar to determine the length of loop; a work feeding device: an oscillating lever: a member one end of which is pivotally connected to the outer end of said lever and the op posite end to said work feeding device; and a movable fulcrum for said member pivotally connected to the outer end of said pivoted arm.

27. In a machine of the class described means for varying the distance of travel of the needle bar; comprising a rocker memher pivoted upon a rocking arm and pads against which said rocker arm abuts in its extreme positions; one of said pads being movable in conformity with the adjustment of the work feed.

28. In a machine of the class described means for varying the distance of travel of the needle bar; con'iprising a rocker member pivoted upon a rocking arm and pads against which said rocker arm abuts in its extreme positions; one of said pads being movable in conformity with the adjustment. of the work feed: and means whereby the other pad may be manually adjusted.

29. In a machine of the class described means for varying the distance of travel of the needle bar: comprising a rocker member pivoted upon a rocking arm and pads against which said rocker rm abuts in its extreme positions. one of said pads being movable in conformity with the adjustment of the work feed. and said rocker arm having an adjustable ear to contact with said movable pad.

30. In a machine of the class described, a needle bar; means including a pivoted arm for regulating the stroke of the needle bar to determine the length of loop; an oscillat- Signed by me at 746 Old South Bldg, ing lever; a member one end of which is Boston, Mass. this 21st day of February, 10 pivotally connected to the outer end of said 1922.

lever; a movable fulcrum for said member pivotally connected to the outer end of said WALTER PEARSON arm; a Work feeding device; and a link Witnesses: connecting said Work feeding device With WALTER E. LOMBARD,

the outer end of said member. NATHAN C- L MBARD-

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