US1025082A - Work holding and feeding means for sewing-machines. - Google Patents

Description

c. A. DEARBORN.

WORK HOLDING AND FEEDING MEANS FOR SEWING MACHINES.

APPLICATION FILED Mo. 22, 1910. 1,025,082.

Patented Apr. 30, 1912.

4 SHEETSSHEET 1.

c. A. DEARBORN.

WORK HOLDING AND FEEDING MEANS FOR SEWING MAGHINES.

APPLIOATION FILED DEC. 22, 1910. v 1,025,082. Patented Apr. 30; 1912.

4 SHEETS-SHEET 2.

I km /4/ G. A. DEARBORN.

WORK HOLDING AND FEEDING MEANS FOR SEWING MACHINES.

APPLICATION FILED DBO. 22, 1910. 1,()25,082 Patented Apr. 30, 1912.

4 BHBET8SHEET s.

C. A. DEARBORN. WORK HOLDING AND FEEDING MEANS FOR SEWING MACHINES.

- APPLICATION FILED DEC. 22, 1910. 1,025,082, I Patented Apr. 30, 1912.

4 SHEETS-SHEET 4.

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CHARLES A. DEARBORN, on NEW YoRK, N. Y., ASSIG1\TOR 1'0 DAVID J. unwnnnnor NEW YoRK, N. Y.

WORK HOLDING AND FEEDING MEANS FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Apr. 30, 1912.

Original application filed August 12, 1910, Serial No. 576,793. Divided and this application filed December 22, 1910. Serial No. 598,752.

To all whom it may concern:

Be it known that I, CHARLES A. DEAR- BORN, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Work Holding and Feeding Means for Sewing-Machines, of which the following is a specification.

The present application is a division of my original application Serial No. 57 6,7 93, filed August 12th, 1910, which has been confined to improvements in stitch forming mechanism for sewing machines, and the present invention relates particularly to improvements in sewing machines for overseaming blind stitch work of the power driven type such as illustrated in Patent No. 814,025 granted to me March 6th, 1906.

The present invention includes improvements in the work supporting and feeding mechanism of this type of machine, and the object of the invention is to simplify andimprove the construction with a view of re ducing the cost of manufacture, increasing the life of the machine, improving the quality of the work, and simplifying and increasing the speed of the manipulation and operation of the machine.

The work supporting and feeding mechanism of the present invention includes modified forms of the work supporting plates or platens and the presser foot of my above named patent. An oscillating ridge-forming rib or disk is mounted between the work supporting plates or latens and preferably formed with forwar ly presented inclined cloth engaging teeth and an upper reciprocating feeding device engages the work in the plane of feed adjacent to said rib or disk. The teeth of the ridge-formin disk are freed from the work on the bac (ward movement of the. disk because of the inclination of the teeth and. the raising of the upper feeding device from the work. The work supporting platens upon opposite sides of the ridge-forming disk are in the form of thin plates orfingers pivotally and yieldingly mounted upon spring sustained arms so that each finger or platen can yield independently either upon its supporting arm 79 mg in or with its supporting arm. The ridgeforming rib or disk is mounted upon an oscillatory shaft having a novel driving connection with a suitable operating part of the machine such as the arm of the upper .feed device, so as toimpart'to said disk a back and forth oscillation. This form of ridge-forming rib' is of importance in fullor of the work. The presser foot is pivotally mounted upon the overhanging machine arm above the work support as in my above named patent, but unlike the structure of said patent, the presser foot in my present machine is yieldingly held down in its normal position by a spring confined between the presser foot and machine arm, said presser foot spring being of less strength than the spring of the work support, so that the presser foot will yield upwardly when an unusual thickness in the work passes under it. The upward yield ofthe presser foot is limited to prevent its interference with the movements of the looper and needle, and the presser foot is out out at one side of the line of stitching to permit the mounting of the/stationary stitch and needle guide close to the line of stitching and at the same time allow the presser foot to yield upwardly relatively to said guide.

In order that my invention may be fully understood I will first describe the same with reference to the accompanying draw-' ings, and afterward point out thenovelty more particularly in the annexed claims.

, In said drawings: Figure 1 is a side elevation of my improved sewing machine.

Fig. 2 is a plan view of the same. Fig. 3..

type to which my improvements are particu-' larly applicable is formed of a single casting working in. the under layer,

comprising a rigid central base 1, the upwardly extending arm 2 terminating in sleeves or shaft bearings 3, and a forwardly extending arm 5 having bearings for the needle rocker shaft 15 and for the looper and operating mechanism.

10 is the main driving shaft of the machine, journaled in the bearings 3 of the rear arm 2 and having secured at one end the driving pulley 11 and fly wheel 12.

15 is the forwardly-extending needle rockshaft j ournaled in the bearings 6 and 7 and having rigidly mounted upon its forward end a needle-carrying rock-arm 16, in which is mounted a curved needle 17 18 is the usual thread-guide and needleclamp mounted upon the rock-arm 16 by means of the set-screw 19.

20 and 21 are ordinary thread-guides.

Secured to the rear end of the needle rockshaft 15 is a rock-arm 25, having universal joint connection 26 with a link 27, which encircles an eccentric 28, mounted upon the main power-shaft 10 just inside of the crankdisk 13. The link 27 and the eccentric 28 are formed with spheroidal engaging surfaces to allow free lateral play of the link in the transmission of the rotary motion of the main shaft 10 into the oscillatory motion of the needle shaft 15. By this needle-operating mechanism (which is the same as in my prior patents) the needle is given a reciprocatory motion in an arc trans erse to the path of the work which is passed through the machine by the mechanisms now to be described. I

Projecting up from the forward edge of the base 1 is an auxiliary arm 30, which is rigidly secured to the base by means of setscrews or bolts 31. The auxiliary arm 30 is formed at its upper end with two sleeves 32 and 33, in which is mounted a pivot-shaft 34, projecting a little beyond each of the sleeves 32 and 33. Set-screws 35 pass through the sleeves 32 and 33 and engage the pivot-shaft 34 for holding it rigidly in position.

40 is a horizontal forwardly-extending spring-sustained work-supporting frame. This frame 40 has the rearwardly presented integral journal sleeves 41, which are journaled upon the projecting ends of the pivotshaft 34 and rest snugly against the frame sleeves 32 and 33', by which the work support 40 is accurately held in position, said support being allowed to movd vertically upon its pivot. Surrounding the pivot shaft 34 between the sleeves 32 and 33 is a torsion spring 45, one end 45 of which is extended beneath the work supporting plate 40 to hold said plate upward with a yielding pres sure, while the other end 45 of said spring is extended down behind the auxiliary frame arm 30 and is engaged by the rear end 46 of the threaded rod 47, which passes freely through an opening formed in the arm 30 and is engaged at its forward threaded end by a butterfly nut 48, by which the tension of the spring 45 can be increased or decreased at will. The work-support 40 is also formed with an integral downwardly projecting arm 41", extending below the lefthand bearing 41 in position to engage an adjustable stop in the form of a screw 49, which. is threaded through an integral post 50 of the auxiliary arm 30. By adjusting the screw-stop 49 the limit of the normally raised position of the work-supporting plate 40 under the action of the spring 45 can be adjusted to a nicet-y.

The work supporting plate 40 is extended to the left (viewing the machine from the front, as shown in Fig. 3) into a work supporting horn which is shaped to receive the ridge-forming disk and the independently-yielding work-supporting plates, which will now be explained.

is the ridge-forming and fulling in disk fixed upon a shaft 61 j ournaled in horizontal position in suitable bearings upon the horn This disk 60 is formed with a series of forwardly presented inclined clothengaging teeth 62 for the purpose hereinafter explained. Adjustably secured to the shaft 61 is a rock arm 63 carrying at its upper end an adjustable crank pin 64.- This crank pin 64 is formed with a spherical head 65 mounted eccentrically with relation to the axis of the crank pin. This crank head can be adjusted upon its axis in the bearing formed in the arm 63 to adjust the length of the crank.

66 is a link pivotally connected with the spherical crank head 65 and extending therefrom rearwardly of the machineto a point 67 where it is pivotally connected with the upper feed arm 133 hereinafter referred to. By this means the shaft 61 is given a back and forth oscillatory motion for oscillating the disk 60 in unison with the upper feed devices hereinafter referred to.

Two independently yielding work supporting plates or platens are mounted adjacent to the ridge-forming rib 60, one being on each side of the rib. The work supporting plates or platens are both of the same 5 construction so that a description of one will suffice for both. Each plate or platen 70 is pivotally mounted at 71 on the upper end of a curved arm or lever 72 which is journaled upon a pin 73 mounted upon the 120 horn 55 .of the work supporting frame 40. The arm orlever 7 2 curves around the shaft 61 for presenting the plate 70 in proper position. A curved arm 72 extends from the bearing hub of the arm 72 and has connect- 125 ed with it a spring 74 attached at 75 to the horn of the work supporting frame for the purpose of yieldingly holding the arm or lever 72 in normal position. A spring 76 mounted upon a pin 77 projecting from one 130 with a nut or collar 78 and its other end in engagement with the slotted heel of the plate or platen 70. This spring 76 yield-;

pivot 71. Each plate 70 is formed with an 1 integral 111 70 'projecting from it in rear of the shaft 61 so as to engage said shaft and limit the movement of plate or platen 70 upon pin 71 inthe opposite direction. It will be observed that each plate or platen 70 is pivoted at a point near its heel or rear end to the arm 72 and that the forwardly projecting portion of each plate or platen is cut out as shown at 70 to. give freedom of motion either when the platen is moved upon its pivot or moves with supporting arm 72. Fromthis construction it will be clear that the rear end or heel of each platen will move'downwardly toward arm 72 only in conjunction with the downward movement of arm 72 under the action ofan extra thickness of material. 7

100 is the presser foot, removably secured by screws 101 to the forward web portion of a yoke '102, which is formed with rearwardly presented lugs 103, which are pivoted upon set screws 104, mounted in the downwardly projecting lug 105, formed integral with the machinearm 5'.

106 is a torsion spring secured to the machine arm and engaging the'under surface of the yoke 102, as clearly illustrated and described in my above named Patent No. 814,125. This spring 106 tends to move the presser foot upwardly and to support it in normal approximately horizontal position when the cloth supporting frame isde-. pressed. Mounted upon the upper face of the presser footlOO is a yoke 115 formed with a central depression which rests in a transverse slot 117 formed in a headed guide pin or stud 116 secured to the machine arm 5 beneath the forward bearing for the needle rock shaft. This headed pin or stud 116 confines between its head and'the sewing machine arm an expansion spring 118, the lower end of which projectsacro'ss the slot 117 and engages the yoke 115. spring 106 above referred to holds the pivotally mounted presser foot with its yoke 115' in engagement with the spring 118 and since the sprlng 118 is stronger than the spring. 106, said spring 118 will not be compressed to any appreciable extent when the presser foot is in its normal position, but is capable of being compressed to allow a slight further upwardmovement of the presser foot when the presser foot is subjected to a greater upward pressure. ward movement of the presser foot may be the limit of the compression 'of spring 118 The The limit of up- I or itmay' be limited by the depth of the slot 117. The spring 118 is of less strength than the spring 45 above referred to so that when an unusual thickness of work passes between the presser foot and the work supporting parts upon the supporting frame 40 the slightly to permit the passage of the excess of thickness, and if the permitted upward movement of'the presser foot is not sufficient presser 'foot will move upward passage of the extra thickness in supporting plates 7 O and the ridge-forming disk 60, and in which the upper feed member hereinafter referred to operates. The

presser foot 100 is also formed at one side i of the slot 110 with a needle guiding groove 111 and in rear of this groove is an'opening- 112 into which the looper is depressed just prior to taking the loop from the needle. At its opposite side, the presser foot 100 is formed with an, opening 113 alongside of the main longitudinal slot 110.

Secured to the sewing machine arm 5 at 120 adjacent to the forward bearing of the needle rock shaft is the stitch and needle guide 121, constructed as fully set forth and claimed in my above-named original application, Serial No. 576,793. This guide member 121 is presented in a constant relation tothe needle and looper without regard to the varying thicknesses in the work and the changing positions of the presser foot, the slot or opening 113 of thepresser 'foot being of proper size'to receive the lower end of the guide and thereby permit the movements of the presser foot. 7

Coiiperating with the work supporting devices described above, I'prefer to employ an upperfeeding device of the constructhe needle." This two part feed dog is preferably formed inte ral with andprojec'ts laterally from a supporting arm 132, which is secured, by means of screws, to the forward end of a longitudinally movable rock-' .ing arm or bar 133.- This arm or bar 133 is formed between its ends with an elongated slot or opening 134:,inclined slightly from the horizontal. An anti-friction roller 135 is supported upon one of the'set screws 104 from the machine frame lug 105 and engages in the inclined elongated slot or referred to.

machine by which the feed mechanism is opening 134 for supporting the arm or bar 133, with the feed dog in operative position. The rear end or bar 133 is formed with a yoke 136, which embraces an eccentric 137, fixed to the main driving shaft 10 of the operated. This eccentric will cause the arm or bar 133 to reciprocate forwardly and backwardly and rock slightly upon its pivot roller 135 to raise and lower the feed dog. The inclined slot 134, moving over the antifriction roller 135 during the reciprocation of arm or bar 133, serves to counteract the lifting of the dog on its feeding stroke and increasing the lifting action on its return stroke. The movement of the feed dog under the action of the eccentric, as modified by the inclined slot and roller support, will be a feeding stroke in a straight line in a horizontal plane and a return stroke in an arc. The two rows of teeth upon the feed dog 130 and 131 engage the work in slot 110 of the'presser foot directly above the independently yielding work-supporting plates above referred to.

1 10 is a looper rod journaled in the bearings 141 and 1&2 projecting from the bearings of the needle rock shaft above These bearings support the looper rod 140 adjacent to the needle rock shaft and inclined downwardly and inwardly with relation thereto. At the forward end of the looper rod is the adjustably mounted looper properwhich is preferably constructed as fully described and claimed in my above-named original application, Serial No. 576,793.

Between the bearings 141 and 142 the looper rodis provided with two tape wheels or pulleys 160, both of which are adjustably secured upon the looper rod by means of set screws 161, and are formed with milled surfaces 160 A driving tape or belt 165 operates upon each of the tape wheels or pulleys 160 to which it is secured at its end.

Each driving tape 165 extends from a wheel or pulley 160 to a pulley segment 170, to which its opposite end is attached. These pulley segments 170 are formed in tegral into a rocking member which is journaled upon the pin 175 extending from the sewing machine arm 5, the two segments being arranged in parallel vertical planes extending at right angles to the planes in which the tape wheels or pulleys 160 operate. These pulley segments are separated sufiiciently \to permit the convenient arrangement of the tapes between the wheels or pulleys 160 and said pulley segments, it being understood that the tapes extend in opposite directions around the tape wheels or pulleys so as to be alternately wound and unwound upon the wheels or pulleys under the action of the rocking pulley segments.

The rocking connected pulley segments 170 have a crankpin 180 to which is journaled the end of a link 181 journaled at its opposite end upon a crank pin 182 extending from the crank disk 13 fixed to the end of the main shaft 10 of the machine by which the pulley segments are oscillated for imparting the oscillating movements to the looper.

The described structure of the stitch forming mechanism forms no part of the present invention, but is fully claimed in my above-named original application Serial No. 576,793.

The operation of the novel parts of the improved sewing machine will be understood from the following explanation.

The movements of the needle and the upper feed device are the same as explained in my above-named patents and need not be further described,

The work to be sewed is inserted as in the former type of my machine by depressing the work plate 10 and placing the work beneath the presser foot 100 and above the ridge-forming disk 60 and work supporting plates or platens 70. The work supporting plate 40 is then allowed to move up 1nto its normal position, which causes the disk 60 to press a ridge of work up into the main 1ongit-udinal slot 110 of the presser foot, the plates 70 supporting the work upon opposite sides of the ridge-forming disk and yielding independently of each other to permit inequalities in the work to pass beneath the presser foot under the action of the feeding devices. Since the toothed ridge-forming disk 60 has a to and fro motion imparted to it simultaneously with the movements of the upper feeding device, the under layer of the work will be worked in or fulled in It will'be understood that the adjustable crank upon shaft 61 enables the operator to determine the length of the oscillations of the toothed disk 60 with relation to the stroke of the upper feeding device 130, 131.

Ordinarily the adjustment will be such that the toothed disk 60 will have oscillations a little greater in extent than the feeding stroke of said upper feeding device, so that the under layer of work will be fulled in This fulling in can be partially regulated at the will of the operator by holding back upon the work more or less as it advances into the machine.

In accommodating the varying thickness of the work passing between the presser foot and work supporting devices, the. plates or platens 70 are capable of yielding either upon their pivots 71 or upon the pivotal supports of levers 72. In case an unusual thickness in the work passes over the disk 60 so that additional space must be afiorded between the disk and the presser foot, the

spring 118 will yield to permit the presser foot to move upward slightly, said upward movement of the presser foot not interfering in any way with the movements of the stitch forming mechanism.

I claim 1. In a sewing machine, the combination ofsuitable stitch forming mechanism, and suitable work feeding mechanism, with a spring sustained Work support pivoted transversely of the line of feed,- a presser foot presented above said work support and having a restricted yielding movement with relation thereto, and an oscillating toothed ridge forming rib mounted upon said work support.

Y 2. In a sewingmachine, the combination of'a suitable frame,-having an overhanging arm, a presser foot pivotally mounted upon said arm, a spring confined upon said arm, a yoke projecting from said presser foot in engagement with the spring upon saidarm,

- and a spring sustained work support arranged beneath said presser foot.

3. In a sewing machine, the combination of a suitable frame, having an overhanging arm, a presser foot pivotally'mounted upon said arm, a guide projecting from said arm, a spring confined upon said guide, a yoke projecting from said presser foot in engagement with the spring upon said guide,'and a spring sustained work support arranged be-' neath said presser foot.

4. In a sewing machine, the combination of a suitable frame, having an overhanging arm, a presser foot pivotally mounted upon 'said arm, a slotted guide pin projecting from said arm, a spring confined upon said guide pin, a yoke projecting from said presser foot'into the slot of said guide pin in engagement with the spring thereon, and

a springsustained work support arranged; beneath said presser foot.

5. In a sewing machine, the combination of a suitable frame, suitable stitch-forming mechanism including a reciprocating needle,

a stationary guide for said needle, a spring sustained work support pivoted transversely of the line of stitching, a pivotally mounted presser foot presented above said work support, and a spring yieldingly holding said presser foot 111 operatlve'relationtosaid work support.

6. In a sewing machine, the combination. of suitable stitch forming mechanism, a slot-' ted presser foot, a yieldingly mounted work support beneath said presser foot, a ridge forming member upon said work support adapted to press a rib of work up into the slot of saidpresser foot, and a pair of independently'yielding plates or platens mounted upon opposite sides of said ridge forming member to support the work upon opposite sides of the line of stitching, each of said plates or latens being pivotally mounted upon a yie dingly supported rock arm.

7. In a sewing machine, the combination of suitable stitch forming mechanism, a

slotted presser foot, a yieldingly mounted slot-ted presser foot, a yieldingly mounted work support beneath said presser foot, a

ridge-forming device uponsaid work support adapted to press a rib of work up into the slot of said presser foot, and a pair of independently yielding plates or platens ,mounted upon opposite sides of said ridgeforming device to support the work upon opposite sides of the line of stitching, each'of said plates or platens being pivotally mounted upon an axis extending at right angles to the line of stitching.

9. In a sewing machine, the combination of suitable stitch forming mechanism, a

slotted presser foot, a yieldingly mounted work support beneath said presser foot, a ridge forming device upon said work support adapted to press a rib of'work up into the slot of sa-idpresser foot, and a pair of independently yielding plates or platens mounted upon opposite sides of said ridge forming device to support the work upon opposite sides of the line of stitching, each of said plates or platens being pivotally mounted upon a yieldingly supported rock arm and the axes of movement of the plates or platens and their supporting rock arms extending at right angles to the line of stitching.

10. In a sewing machine, the combination ofsuitable stitch forming mechanism, a presser foot, a yieldingly mounted work support arranged beneath the presser foot, and independently yielding work supporting plates or "platens, each comprising a rock arm, a spring holding saidrock arm in normal position, a plate pivotally mounted upon said rockarm, and a spring retaining said plate in normal position upon said rock arm.

11. In a sewing machine, the combination of a suitable stitch. forming mechanism, a presser foot, a yieldingly mounted work support arranged beneath the presser foot, and independently yielding work supporting plates or platens, each comprising a rock arm extending parallel with the line of stitching, a spring holding said r0ck arm in normal position, a cloth engaging plate pivotally mounted upon said rock arm and extending parallel with the line of stitching, and a spring retaining said plate in normal position upon said rock arm.

12. In a sewing machine, the combination of a suitable stitch forming mechanism, a presser foot, a yieldingly mounted work support arranged beneath the presser foot, and independently yielding work supporting plates or platens, each comprising a rock arm, a spring holding said rock arm in normal position, a plate pivotally mounted upon said rock arm, an arm projecting from said plate, a stop engaging said arm for limiting the movement of the plate upon the rock arm in one direction, and a spring retaining said plate in normal position upon said rock arm.

13. In a sewing machine, the combination of. suitable stitch forming mechanism, a presser foot, a work support yieldingly mounted beneath the presser foot, a shaft mounted upon said support, a ridge-forming disk carried by said shaft, a journal pin mounted upon said support parallel with said shaft, a pair of rock arms journaled upon said pin, springs retaining said rock arms in normal position, cloth supporting plates pivotally mounted upon said rock arms above said shaft and arranged upon opposite sides of said ridge-forming disk, and springs mounted upon said rock arms and engaging said plates for yieldingly supporting them upon the rock arms.

14. In a sewing machine, the combination of suitable stitch forming mechanism, a presser foot, a work support yieldingly mounted beneath the presser foot, a shaft mounted upon said support, a ridge-forming disk carried by said shaft a journal pin mounted upon said support in front of and parallel with said shaft, a pair of rock arms journaled upon said pin and extending to the rear of said shaft, springs retaining said .rock arms in normal position, cloth supporting plates pivotally mounted upon said rock arms in rear of said shaft and extending forwardly above said shaft and arranged upon opposite sides f0 said ridge-forming disk, and springs mounted upon said rock arms and engaging said plates for yieldingly supporting them upon the rock arms.

15. In a sewing machine, the combination of suitable stitch forming mechanism, a

presser foot, a work support yieldingly mounted beneath the presser foot, a shaft mounted upon said support, a ridge-forming disk carried by said shaft, a journal pin mounted upon said support parallel with said shaft, a pair of rock arms journaled upon said pin, springs retaining said rock arms in normal position, cloth supporting plates pivotally mounted upon said rock arms above said shaft and arranged upon opposite sides of said ridge-forming disk,

arms projecting from said plates into engagement with said shaft for limiting the movements of said plates in one direct-ion, and springs mounted upon said rock arms and engaging said plates for yieldingly sup porting them upon the rock arms.

16. In a sewing machine, the combination of suitable stitch forming mechanism, a slotted presser foot, a work support, a shaft journaled in said work support, a ridgeforming disk secured upon said shaft in the same plane with the slot of said presser foot, said disk being formed with cloth engaging teeth, and operating means for imparting an oscillatory back and forth motion to said ridge-forming disk.

17 In a sewing machine, the combination of suitable stitch forming mechanism, a slotted presser foot, a work support, a shaft journaled in said work support, a toothed ridge-forming disk secured upon said shaft in the same plane with the slot of said presser foot, operating means for imparting an oscillatory back and forth motion to said ridge-forming disk, and a feeding device engaging the upper face of the work.

18. In a sewing machine, the combination of suitable stitch forming mechanism, a slotted presser foot, a work support, a shaft journaled in said work support, a toothed ridge-forming disk secured upon said shaft in the same plane with the slot of said presser foot, and means for operating said ridge-forming disk including a rock-arm upon said shaft, and an operating pitman having adjustable connection with said rockarm.

19. In a sewing-machine, the combination of suitable stitch forming mechanism, a slotted presser foot, a work support, a shaft journaled in said work support, a toothed ridge-forming disk secured upon said shaft in the same plane with the slot of said presser foot, a rock arm upon said shaft, a

crank pin adjustably mounted in said rock arm and formed with a spherical head arranged eccentrically with relation to theaxis of said pin, and an operating pitman plvotally engaging said head.

20. In a sewing machine, the combinatlon of suitable stitch forming mechanism, a slotted presser foot, a work support,a shaft journaled in said work support, a toothed ridge-forming disk secured upon said shaft in the same plane with the .slot of said.

presser foot, a rock arm upon said shaft, a crank pin adjustably mounted in said rock arm and formed with a spherical head arranged eccentrically with relation to the axis of said pin, a reciprocating feed arm, and an operating pitman connected with said feed arm and pivotally engaging said head.

21. In a sewing machine, the combination of suitable stitch forming mechanism, a yieldingly mounted presser foot having a cloth receiving slot and a needle guide receiving slot, and a 'yieldingly mounted Work support arranged beneath said presser foot and carrying an oscillatory toothed ridge forming disk which operates in said cloth receivin slot, with a stationary needle guide mounted above said presser foot and prov slot.

CHAS. A. DEARBORN.

Vitnesses:

M. G. CRAWFORD, WM. E. KN/IGHT.

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