US1124667A - Feeding mechanism for sewing-machines. - Google Patents

Description

Witneoou MQW Patented Jan. 12,1915.

3 SHEETS-SHEET 1.

THE NORRIS PETERS co., PHOTO LITHOH WASHING rON, D. c.

D. S. SEYMOUR.

FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED AUG" 8, 1908.

1,124,667, Patented Jan. 12,1915.

3 SHEETSSHBET 2.

WWW 2 X (f M a; W. WW

THE NORRIS PETERS 50.. FHOTO-LITHQ. WASHINGTON, D. t

D. S. SEYMOUR.

FEEDING MECHANISM FOR. SEWING MACHINES.

APPLICATION FILED AUG..8, 1908.

1,1 24,667. Patented Jan. 12, 1915.

3 SHEETS-SHEET 3.

@NITED S.

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DUDLEY S. SEYMOUR, OF OAK PARK, ILLINOIS, ASSIGNOR TO 'UNIONSPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FEEDING MECHANISM FOR SEWING-MACHINES.

Application filed August 8, 1908.

'Oak Park, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Feeding Mechanism for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing, and to the letters and figures of reference marked thereon.

My invention relates to new and useful improvements in feeding mechanism, and more especially to feeding mechanism for sewing machines.

An object of my invention is to provide a feeding mechanism wherein the parts for operating the feed dog are durable in construction, and positive in action, and which are so arranged as to give to the feed dog, a forward feeding movement, substantially in a straight line parallel with the work support.

A further object of the invention is to provide a feeding mechanism for a sewing machine with operating parts which are located as far as possible from the stitching point, so that dirt and lint dislodged from the material by the needle, will not fall upon the bearings of the movable parts.

Still further objects of my invention will in part be obvious and will in part be more fully hereinafter described.

In the drawings which show by way of illustration one embodiment of my inventionz-Figure 1 is a front elevation, with certain parts removed, showing a machine embodying my invention. Fig. 2 is a top plan view with certain parts in section, showing the forward end of the machine, with my feeding mechanism applied thereto. Fi 3 is a View of the feeding mechanism taken from the front end of the machine, also showing certain parts in section. Fig. 4 is a sectional View on the line 44 of Fig. 2. Fig. 5 is a detail view showing the movement of the link which gives the up and down movement to the feed bar.

I have shown my invention as applied to the Union Special Enclosed Bag type of machine, although it is obvious that from certain aspects, the same maybe applied to any typeof sewing machine.

In the drawings, the bed plate 1 has. risingatherefrom, an inclosed. casing. which ex- Specification of Letters Patent.

Patented J an. 12, 1915.

Serial No. 447,536.

tends forward to form the overhanging arm 3, and carries at its forward end, a needle head 1. A needle 0 1s carried by a needle bar (3, and is reciprocated by a lever 7 from the main shaft 8 by means of the link 9. The needle mechanism however, and the thread controllers therefor, form no part of the present invention, and will not need further description.

Cooperating with the needle 5, is a thread carrying looper 10, which is pivoted at 11 on a looper carrier 12. Said looper carrier or rocker 12, is mounted at one end on a short'stud 13 supported by a lug let, rising from the bed plate 1. Said looper carrier 12 is mounted at its other end on a short shaft 15 mounted in a bearing 16, formed in the casing 2 of the machine. Said shaft 15 extends through the bearing 16, and carries a crank arm 17 at its free end. The arm 17 carries a ball stud 18 at its free end, which engages a ball socket l9 Fig. 4), formed in an eccentric strap 20, which cooperates with an eccentric 21 on the main shaft 8. As the eccentric 21 rotates, the arm 17 is oscillated, and the looper thereby given its lateral or needle avoiding movements. The looper is oscillated on its ivotal support 11 by a link 22, which is connected in the usual manner to the needle lever extension 23. A feed dog 2st is detachablv supported by the feed bar 25. Said feed bar is pivoted at 26 to a rocking frame 27, which is pivotally supported at 28 in suitable bearings carried by the bed plate. Said rocking frame 27 is vibrated back and forth by means of a link 29 which is pivoted at one end to the rocking frame, and at its other end to a slotted arm 30, formed integral with the eccentric strap 20" (see Fig. l). The arm 30 is slotted at 31, andthe link 29 is pivoted to a stud 32, which may be adjusted in the slot 31'and sec red in any desired position in said slot. By adjusting the stud 32 in the slot 31, the throw of the rocking frame 27 may be varied, and thus the amount of movement given to the feed dog correspondingly varied. As a means for giving the vertical movements to the feed dog, I have provided the feed bar 25 with a downwardly extending arm 33, which in turn is provided with forwardly projecting arms 34 and 85. The looper carrier or rocker 12 is provided with forwardly projecting lugs I 36 and 37. A curved link 38 is pivoted at 39 to the lug 37, and at 40 t0 the free end of the arm 35. A curved link i1 is pivoted to the lug 36 at 42, and to the free end of the arm 34 at 43.

The operation of my feeding mechanism is as follows: Vfhen the eccentric 21 is in the position shown in Fig. 1, the arm is at the rear end of its stroke, and the feed bar with the feed dog has just completed its feeding movement. A continued movement of the eccentric causes the arm 30 to move I at the rear end of its stroke, as shown in' Fig. 3. As the feed bar moves forward. the

link 38 swings about the pivot 39. In view of the fact that the pivotal point 40 at this time is in rear of the point 39, as the link 38 swings. the point 410 will be carried downward. This downward movement of the.

point 40 caused by the swinging of the link 38, will be added to the downward movement of the lug 37, and the feed dog will thus be quickly moved out of engagement with the material. The parts are so timed and positioned that the pivot point 410 is in a vertical line passing through the point 39, at substantially the time the eccentric 21 has rotated through an arc of90 or has made a quarter rotation. As soon as the eccentric makes a quarter rotation, the arm 17 is lowered, and the lug 37 begins to rise. At this time the point 40 moves in front of the point 39, and begins to rise. Again the upward movement of the lug 37 is added to the upward movement of the point 40, caused by the swinging of the link, and the feed dog is moved quickly into engagement with the material. The parts now are in the position shown in dotted lines in Fig. 5. The continued movement of the eccentric 21,

causes the feed dog to begin its feeding movement. The link 38 swings back toward a vertical line passing through the pivotal point 39. The tendency of the swinging movement of the link 38 is to carry the point 40 downward. At this time, however, the lug 37 is still rising, and the upward movement of the lug 37 is offset by the downward movement of the point40, and the point 10 will move toward the rear of the machine in substantiallv a. straight line, or from the position at a, Fig. 5, to the position at b. A further movement of the eccentric 21 will cause the lug 37 to drop. The link has now passed the vertical position and the point 40 tends to rise, owing to the swinging of the link to the rear of the vertical. 'This is, however, offset bythe downward movement of the lug 37, and the point e0 continues its straight line movement.

From the above described operation of parts, it will be seen that the feed dog is given a feeding movement which is substantially a right line movement parallel with the work support, and the feeding movement is followed by a quick movement out of engagement with the material, and a quick movement into engagement with the material.

' The illustrated type of machine is especially adapted for stitching coarse burlap for making bags. In this character of work, there is a great deal of lint and dirt dislodged from the material during the stitching operation. It will readily be seen that the operating parts of my feeding mechanism are located at a considerable distance from the stitching point, and, therefore, the bearings are not as liable to be worn by the grit and dirt falling from the material. 1 I have also shown the main shaft 8 as terminating after passing through the casing 2 sufliciently far to carry the thread controller 44, so that underneath the stitching point, there are no rotating parts, as has heretofore been usual in this machine. The casing 2 is provided with a slot &5 to allow the link 29 to operate the feed rocker. The feed dog receives all its movements from a single cam, which is housed within the easing where the same may be kept free from dirt.

It is obvious that minor changes in the details of construction and arrangement of parts, may be made without departing from the spirit of my invention.

Having thus particularly described my invention, what I claim as new and desire to secure by Letters Patent is 1. The combination with a work support of a feed bar, a feed dog carried thereby between its ends, a main shaft located beneath the plane of the work support, an eccentric member carried by said main shaft, a rock shaft connected to said feed bar for moving the same back and forth, devices for connecting said rock shaft to said eccentric member, a second rock shaft located in front of said feed dog, devices for connecting said second rock shaft to said feed bar for moving the same up and down, and devices for connecting said second rock shaft with said eccentric member.

2. The combination with a work support of a feed bar, a feed dog carried thereby, a main shaft located beneath the plane of the work support, an eccentric member carried by said main shaft, a rock shaft connected to said feed bar for moving the same back and forth, devices between said rock shaft and said eccentric member for rocking said shaft, a second rock shaft located in front of said feed dog, devices for connecting said second rock shaft to said feedbar, including a swinginglink and devices forconnecting said second rock shaft to -saideccentric member.

3. The combination with a work support of a feed bar, a feed dog carriedthereby, a main shaft located beneath theplane of the work support, an eccentric member carried by said main shaft, devicesforconnecting said feed bar to said eccentric member for moving the same back and forth, a rock shaft in front of said'feed dog, devices for connecting said rock shaft tosaideccentric member, a link pivotally connected at its upper end to said rock shaft, andpivotally connected at its lower end to devices carried by said feed bar.

a. The combination with a work support of a feed bar, a feed dog carriedthereby, a main shaft located beneath the planeof the work support, an eccentric-member carried by said main shaft, devices for connecting said feed bar to said eccentric member for moving the same back and forth, a rock shaft in front of said feed dog, devices for connecting said rock shaft to said eccentric member, a link pivotally connected at its upper end to said rock shaft, andpivotally connected at its lower end to devices carried by said feed bar, said link being so disposed as to oscillate back and forth on each side of a vertical line.

5. The combination of a feed bar, a feed dog carried thereby, a main shaft, an eccentric member carried by said main shaft, devices between said feed bar and said eccentric member for moving the feed bar back and forth, a rock shaft locatedin front of said feed dog, devices for connecting said rock shaft to said eccentric member, devices for connecting said rock shaft to said feed bar for moving the same up and down, a looper pivotally supported on said. rock shaft so as to be moved laterally thereby, and means for oscillating said looper.

6. The combination with a work support of a feed bar, a feed dog carried thereby, a main shaft located beneath the plane of the work support, an eccentric member carried by said shaft, devices for connecting said eccentric member to said feed bar for moving the same back and forth, a rock shaft located in front of said feed dog, devices for connecting said rock shaft to said eccentric, a substantially horizontal arm carried by said rock shaft, a link pivoted at its upper end to said arm, and devices for connecting the lower end of said link to said feedbar, whereby said feed bar is moved up and down.

7. The combination of a feed bar, a feed dog carried thereby, a main'shaft', an eccentric member carried by said shaft, de-

ices for connecting said .eccentric member to'said feed bar for moving the same back and forth,-a rock shaft located in front of said feed dog, devices for connecting said rock shaft to said eccentric member, a substantially horizontal arm carried by said rock shaft, a link pivoted at its upper end to said arm, and devices for connecting the lower end of said link to said feed bar, whereby said feed bar is moved up and down, a looper pivotally connected to said rock shaft so as to be moved laterally thereby, and means for oscillating the looper about its pivotal connection.

8. The combination of a feed bar, a feed dog carried thereby, a main shaft, an eccentric member carried by said main shaft, devices for connecting said eccentric member to said feed bar for moving the same back and forth, an arm carried by said feed bar, and extending underneath said main shaft, a rock shaft located in front of said main shaft, devices for connecting said rock shaft to said eccentric member, and a link for connecting said rock shaft to said arm, whereby said feed bar is moved up and down.

9. The combination of a feedbar, a feed dog carried thereby, a main shaft, an eccentric member carried by said main shaft, devices for connecting said eccentric member to said feed bar for moving the same back and forth, an arm carried by said feed bar, and extending underneath said main shaft, a rock shaft located in front of said main shaft,'devices for connecting said rock shaft to said eccentric member, and a link for connecting said rock shaft to said arm, whereby said feed bar is moved up and down. a looper pivotally connected to said rock shaft, so as to be moved laterally thereby, and means for oscillating said looper about its pivotal connect on.

10. The combination of a feed bar, a feed dog carried thereby, a main shaft, an eccentric member carried by said main shaft. devices for connecting said eccentric member to said feed bar for moving the same back and forth, a rock shaft located in front of said feed dog, devices for connecting said rock shaft to said eccentric member, de vices for connecting said rock shaft to said feed bar for moving the same up and down, a looper, means for pivotallv suppo ting said looper whereby it is moved laterally by said rock shaft. a needle, a second eccentric member, carried by said main shaft. devices for connecting said second eccentric member to said needle for vibrating the same, and devices for connecting said second eccentric member to said looper for oscillating the same.

11. The combination of a feed bar, of a feed dog carried thereby. a main shaft, an eccentric member carried by saidmain sh aft, devices for connecting said eccentric member to said feed bar for moving the same back and forth, a looper, common devices for connectmg said looper and said feed bar to said eccentric member, whereby said feed bar is moved up and down and said looper is moved laterally, and means for oscillating said looper back and forth.

12. The combination of a feed bar, of a feed dog carried thereby, a main shaft. an eccentricmember carried by said main shaft, devices for connecting said eccentric member to said feed bar for moving the same back and forth, a looper, common devices for connecting said looper and said feed bar to said eccentric member, whereby said feed bar is moved up and down and said looper is moved laterally, a needle, a second eccentric member carried by said main shaft, and common devices connecting said second eccentric member to said needle for vibrating the same and to said looper for mov ing the same back and forth.

13. A sewing machine including in combination a bed plate, a cloth plate carried thereby, a casing rising from said bed plate, a-main shaft located within the casing and in a horizontal plane extending beneath the cloth plate, a feed dog located outside of the casing, a feed bar supporting said feed dog, a rocking frame to which said feed bar is pivoted, an eccentric located on said main shaft within the casing, an eccentric strap carried by said eccentric, a link pivoted to said eccentric strap, and to said rocking frame, a rock shaft, a link intermediate said rock shaft and said feed bar, and means operative from the main shaft within the casing for oscillating said rock shaft.

14. A sewing machine including in combination a bed plate, a cloth plate carried thereby, a casing rising from said bed plate, a main shaft located within the casing and in a horizontal plane extending beneath the cloth plate, a feed dog located outside of the casing, a feed bar supporting said feed dog, a rocking frame to which said feed bar is pivoted. an eccentric located on said main shaft within the casing, an eccentric strap carriedv by said eccentric, a link pivoted to said eccentric strap and to said rocking frame, a rock shaft, a link intermediate said rock shaft and said feed bar, said rock shaft extending within the casing and having an arm-connected to said eccentric strap for giving the rising'and falling movements to the feed dog.

15. A sewmg machine including in combination a bed plate, a cloth plate carried thereby, a casing rising from said bed plate,

a main shaft located within said casing and in a horizontal plane extending beneath the cloth plate, a feed dogoutside of said casing, a feed bar supporting said feed dog, a rocking frame to which said feed bar is pivoted, said feed bar having a forwardly extending arm, a rock shaft in front of said feed dog, a link connecting said rock shaft with said forwardly extending arm, and means connected to the main shaft within the casing, for oscillating said rocking frame; and for oscillating said rock shaft.

16. A sewing machine including in combination, abed plate, a cloth plate carried thereby, a casing rising from said bed plate, a main shaft located within the said casing and in a horizontal plane extending beneath the cloth plate, a feed dog outside of said casing, a feed bar supporting said feed dog, a rocking frame to which said feed bar is pivoted, said feed bar having a forwardly extending arm, a ro k shaft in front of said feed dog. a link connecting said rock shaft with said forwardly extending arm, an eccentric carried by said main shaft within the casing, an arm co'iperating with said eccentric, a link connecting said arm to said rocking fume. and said rock shaft having an arm connected with said first named arm.

17. A sewing machine including in combination a bed plate, a cloth plate carried thereby, a casing rising from said bed plate, a main shaft located within said casing and in a horizontal plane extending beneath the cloth plate, a feed dog outside of said casing, a feed bar supporting said feed dog, a rocking frame to which said feed bar is pivoted, said feed bar having downwardly and forwardly projecting arms, a rock shaft located in front of said feed bar, projecting lugs carried by said rock shaft, links connecting said projecting lugs with said arms, and means operative from said main shaft within thecasing, for vibrating said rocking frame, and for oscillating said rock shaft.

18. A sewing machine including in combination, a bed plate, a casing rising therefrom, a main shaft located within said casing, a feed dog outside of said casing, a feed bar supporting said feed dog, a ro king frame to which said feed bar is pivoted, said feed bar having downwardly and forwardly projecting arms, a rock shaft located in front of said feed bar, projecting lugs carried by said rock shaft, links connecting said projecting lugs with said arms, an eccentric car ied by the main shaft within the casing, an eccentric strap co'iperating with said eccentric, a link connected to said ec centric strap, and to said rocking frame, said rock shaft having an arm connected to said eccentric strap.

19. A'sewing machine including in combination, a bed plate, a casing rising there from, a main shaft located within said casing, a feed dog outside of said casing, a feed bar supporting said feed dog, a rocking frame to which said bar is pivoted, said feed bar having downwardly and forwardly projecting arms, a rock shaft located in front of said feed bar, projecting lugs vcarried by said rock shaft, links connecting said projecting lugs with said arms, an eccentric carried by the main shaft Within the casing, an eccentric strap coiiperating with said eccentric,a link connected to said'eccentric strap and to said rocking frame, said rock shaft having an arm connected to said eccentric strap, and means whereby the connection between said link and said ec centric strap may be adjusted.

20. A sewing machine including in combination, a bed plate, a casing rising therefrom, a feed dog, a feed barcarrying said feed dog, said feed bar having a forwardly projecting arm, means for moving saidfeed bar back and forth, means for moving'said feed bar up and down including a rock shaft, an eccentric carried by said main shaft within the casing, an arm connected to said rock shaft, and operated by said eccentric, means for connecting said rock shaft to the arm extending from said feed bar, a looper mounted on said rock shaft, and means for oscillating said looper.

21. A feeding mechanism including in combination a main shaft, a feed dog, a feed bar supporting said feed dog, a rocking frame to which said feed bar is pivoted, said feed bar having a forwardly extending arm, a rock shaft, a link connecting said rock shaft to said forwardly extending arm, an eccentric on the main shaft, an arm carried by said rock shaft, an eccentric strap cooperating with said eccentric, and pivoted to said arm, and a link pivoted to said eccentric strap, and to said rocking frame.

22. A feeding mechanism including in combination, a main shaft, a feed dog, a feed bar supporting said feed dog, a rocking frame to which said feed bar is pivoted, said feed bar having a forwardly extending arm, a rock shaft, a link connecting said rock shaft to said forwardly extending arm, an eccentric on the main shaft, an arm carried by said rock shaft, an eccentric strap cooperating with said eccentric, and pivoted to said arm, and a link pivoted to said eccentric strap, and to said rocking frame, and means whereby the connection between said link and said eccentric strap, may be adjusted.

23. A feeding mechanism including in combination, a feed bar, a feed dog carried thereby, means for moving said feed bar back and forth, means for moving the feed dog up and down including a link pivotally connected at its lower end to said feed bar, and a vibrating part to which the upper end of said link is connected, said link swinging substantially an equal distance each side of a vertical line whereby a direct lift of the feed bar takes place.

24. A sewing machine including in combination a needle, means for reciprocating said -needle,-a shaft,-an eccentric carried thereby, a looper, means for giving said looper a needle avoiding movement from said eccentric, a feed dog, a feed bar carrying said feed dog, means for raising and lowering said feed bar from said eccentric, means for moving said feed bar back and forth fromsaid-eccentric, and means for oscillating said looper into and'out of said needle loop.

25. A-sewing machine including in combinationa needle a shaft, an eccentric carried by said shaft, means for reciprocating said needle from said shaft,- a looper, a looper rocker on which said looper is mounted, means foraoscillating said'locper on said rocker, means for oscillating said looper rocker from said eccentric, a feed bar, a feed rocker to which said feed bar is pivoted, a feed dog carried by said feed bar, means for oscillating said feed rocker from said eccentric, and means for raising and lowering the feeding bar from the looper rocker.

26. A sewing machine including in combination, a feed dog, an eccentric, devices operated by said eccentric for moving the feed dog back and forth, including a feed bar, devices for moving the feed bar up and down, including a rock shaft, a looper mounted on the rock shaft, whereby the oscillations of the rock shaft will move said looper laterally, and means for oscillating the looper in the direction of its length.

27. A sewing machine including in combination a needle, means for reciprocating said needle, a looper, a main shaft, an eccentric carried by said main shaft, a feed dog, a vibrating part, an arm connecting the said vibrating part with said eccentric, a second vibrating part located on the opposite side of said shaft from said first named vibrating part, a second arm connecting said second vibrating part to said eccentric, a feed bar for supporting said feed dog and having connections with the two vibrating parts, means for adjusting the move ment of one of said vibrating parts, means for mounting said looper on one of said vibrating parts whereby the looper is given a needle avoiding movement as said part vibrates, and means for oscillating said looper on said vibrating part into and out of the needle loop.

28. In a sewing machine, a main shaft, an eccentric carried on said shaft, a feeding mechanism including a feed dog, a vibrating part connected to said eccentric for giving said feed dog its work-engaging move ments, a second vibrating part connected to said eccentric for giving said feed dog its rising and falling movements, said second vibrating part carrying a looper, and means for giving it sidewise movements from said eccentric.

29. In a sewing machine, a Work support, a main shaft located beneath the plane of the Work support, an eccentric carried thereby, a looper, a feed dog, a feed bar, means c for giving said feed dog feeding movements from said eccentric, and means for giving said feed dog up and down movements from said eccentric, including a swinging arm,

and a link curved on the arc of a circle connecting said arm to said feed bar.

30. In a sewing machine, a main shaft,- an eccentric carried thereby, a looper, a looper support, means for vibrating said support from said eccentric, a feed bar Copies of this patent may be obtained for D. S. SEYMOUR.

\Vitnesses E. EASTERBERG, WARD Winona.

five cents each. by addressing the Commissioner of Patents, Washington, D. 0;

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