US1581499A - Sewing machine - Google Patents

Description

April 20, 1926.

J. P. was

SEWING MACHINE Original Filed June 28, 1921 3 Sheets-Sheet 1 INVENTOR.

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514 v 07 I w .fl/fi INVENTOR.

Patented Apr. 20, 1926. V

UNITED STATES PATENT OFFIC JOHN P. WEIS, 0F NYACK, NEW YORK, ASSIGNOR To METROPOLITAN SEWING MA- cnnvn CORPORATION, or NYACK, NEW YORK, ACORPORATION or DELAWARE.

SEWING MACHINE.

Original application filed June 28, 1921, Serial No. 181,0324 Divided and this application filed December T 0 all whom it may concern:

Be it known that I, J HN P. VVEIS, a citizen of the United States, residing at Nyack, in the county of Rockland and State of New York, have'invented certain new and useful Improvements in Sewing Machines,"of which" the following is a specification.

This invention relates to sewing machines, one 'of-the objects thereof being to provide a sewing machine having improved cross stitch mechanismfor laying a thread in the path of the needles on top of the work, wherein improved mechanism is provided for driving the gears in the presser foot, and wherein also the overhanging arm of the machine frame is constructed in animproved manner for supporting and housing the driving means for the cross stitch mechanism.

A further object of this invention is to provide a sewing machine having improved means for driving the cross stitch mechanism and wherein the construction is such that the driving means may be utilized for the purpose of operating a vibrating needle mechanism or other attachment.

This application is a division of my copending application for sewing machines, file-d J une28, 1921, Serial No. 481,032.

Other objects of this invention will appear in'the following description and appended claimsthereof, reference beinghad to the accompanying drawings forming a part of this specification, wherein like reference characters indicate corresponding parts in the several views and wherein Fig. 1. is a front perspective view of the sewing machine with the transmitter and treadle connected for operating the same; Fig. 2 is an end view of the needle bar Operating mechanism, portions of the needle bar bushings, oil cup and needle bar being broken away to clearly show theconstruction, and

a. portion of the overhanging arm and crank' shaft shown in broken lines; Fig. 3 is a sectional view of the rotary top stitch forming mechanism, the machine ifrflame iand cylinder being shown in broken lines;- Fig. 4 is an end view of the mechanism shown in Fig. 3, the crank shaft and the frame of the machine being indicated in brokenlines; Fig. 5 is a sectional view of the press-er foot and stitch mechanism carried thereby, taken on lines 55 of Fig. 3 looking in the di- Serial No. 678,399.

rection of the arrows; Fig. 6 is a sectional View of the presser foot'a-nd stitch forming mechanism carried thereby taken on lines 66' of Fig. 4; Fig. ,7 is a side elevation partly in section of the needle vibrating mechanism for making zig-zag stitches, the needle bar being "shown as pivotally mounted in the head of the machine for swinging,angular, and reciprocatory movement, the frame and cylinder being indicated in broken lines; Fig. 8 is an end view of the mechanism shown in Fig. 7 the crank shaft and frame of the machinebeing indicated in broken lines; and Fig. 9 is an end view of the mechanism for impartingzigzagmovements to the needle bar at right angles to its line of vertical reciprocation. Before explaining in detail the present improvement and mode of operation thereof, it is desired to have it understood that the invention is not limited to the details of construction and arrangement of parts which are illustrated in the accompanying of the frame is provided with a boss 14 for receiving one of the crank shaft bushings- 15, the opposite sidewall having secured thereto a suitable belt guard 22 which covers the drivingbelt 23. Mounted in suitable bearings of the frame is a transversely extending crank shaft 62, 63; This crank shaft is provided with a clutch wheel located adjacent to the cover plate 22 over which passes the belt 23 of the transmitter. The powectransmitter for the machine is designated'generally at A and is secured to the bottom'of the table 1; The power transmitter is driven from any suitable line shaft, and comprises suitable clutch mechanism controlled from a floor treadle 159. A Y

further detailed description of the power transmitter mechanism and the crank shaft mechanism is not deemed necessary herein since the same is fully described in my above mentioned copending application.

Projecting from the front wall 4 is an overhanging arm 32 terminating in the needle bar and presser foot bearing 33. This overhanging arm 32 is provided with suitable bearings 37 and 38 for the needle operating rock shaft 39. Secured to the forward end of the rock shaft 39 by screws 40 is a needle bar operating arm 41. The end of the shaft 39 is tapped to receive a screw 42 and a thrust washer 43 thereby to prevent end movement of the arm 41 on the shaft 39. At the outer end of the arm 41 by means of a joint pin 44 is secured a link 45, the bot-tom end thereof being connected by means of a joint pin 46 to an end piece 47 tapped into the needle bar 48 and clamped with a lock nut 49. The needle bar is hollow and the lower end is tapped to receive the needle holder 50 which carries the needles 51. The needle bar is provided with two openings 52, the upper one being an inlet and the lower one an outlet for oil for the purposes of internally oiling the upper and lower needle bar bushings, 53 and 54.

Secured to the top of the upper bushing 54 is an oil cup 55 provided with a felt oiler,

carrying sufficient lubricant for the needle bar, but preventing the oil from dripping 'and soiling the goods. An intermediate felt oiler 56 is provided between the two bushings. These felt oilers wipe the needle bar in its reciprocating movement, keeping it clean and properly lubricated.

To the rear end of the rock shaft 39, adjacent to the bearing 37 is secured a crank arm 57 and ball stud 58, to which is connected the upper end of a ball connection 59. The lower end 60 also has a ball socket to fit over the ball 61 of the crank shaft.

The cross stitch mechanism for laying a thread in the path of the needles on top of the work, in alternating loop form is an improvement over the mechanism described in my Patent Number 1,464,377, dated August 7, 1923, for sewing machines. In the present machine however improved mechanism for driving the gears in the presser foot is provided over my aforesaid application, and the presser foot is hinged to yield from front to rear in the direction of the feed of the goods in order to ride more freely over seams and uneven thicknesses of work.

Referring particularly to Figs. 3 to 6 1nelusive, the mechanism comprises a driving gear 483 carried by the crank shaft. This driving gear meshes with a similar gear 484 of equal diameter secured. to a shaft 485 by screws 486. These gears are located within the machine frame and the shaft 485 is given a'rotary movement thereby. The shaft is supported in the rear bearing 487 and in the forward bearing 488, the bearings bereduced, the overhanging arm is strengthened, and it is merely necessary to enlarge each end of the tube in order to insert the bearings 487 and 488 for the shaft. This construction has the advantage of reducing the friction of the shaft and provides adequate space 490 for lubricant, which is supplied automatically, to pass from one bearing to the other. The forwardend of the shaft carries a thread controller 491 adjustably secured thereto by the screw 492. The thread controller operates onthe top thread (not shown) as it is conductedfrom the sup- 0 ply to the presser foot and is fully described in my aforesaid patent.

Adjacent to the forward end of the bearing 488 is located a gear 493 secured to the shaft 485 by screws 494. This gear is in mesh with a gear 495 of equal diameter secured by screws 496 to the upper end of a vertical rotaryoperating shaft 497 for the rotary cross thread mechanism. This shaft is located in the hollow or tubular presser bar 183 and has a bearing 498 in the upper end of the tube or bar 183 and a bearing 499 in the lower end of the tube. Intermediate these bearings the shaft is reduced in diameter as at 500 to increase the flexibility of the shaft and to reduce friction. The presser bar or tube reciprocates vertically in the bushing 187 and is controlled by guides 185 and 186. The lower end 502 of thepresser tube 183. is counter-bored vertically at 503 to receive a coil spring 501. The top portion of the coil spring rests against the shoul der formed by the counter bore and the lower end rests against a flange 504 formed as a partof the shaft 497. Projecting from the flange is'a semi-circular key 505 which fits into a semi-circular key hole provided in a' gear 506 in mesh with :an intermediate gear 507 rotating on the stem 508 of the screw 509. The intermediate gear 507 is in mesh with and drives a ring gear 511 which carries a rotary circular plate 512 provided with upstanding thread carrying lugs 513 for forming loops in the top thread. Co-acting withthe lugs is a cast-off 514, integral with the ring 515. The ring gear 511 rotates in a socket in the presser foot, and the overhanging head 510 of the screw 509 impinges upon the flange of the ring 515 to hold the ring gear in position. This screw also acts as a pivot for the intermediate gear and as a locking means for the bottom 517, provided with beveled edges fitting into the presser foot 516, the stem 508 entering the 139.

hole 518 in the bottom 517. Thus the rotarycross thread -carri=er5l2 having its axis sub- The 'presser foot 516 is hinged to a yoke holder 522 by shoulder screws 521,vone arm, of the yoke being connected at 519 and the,

other arm at 520 to the sides of the p-resser foot, enabling the presser foot to rock slightly on the screws; Each of the arms has an overhanging shoulder 523 to contact with and limit the rocking movement of the presser foot. The yoke 522 is clamped to the presser tube or bar 183by a screw 524 passing I through the slotted rear walls, a space 525 permitting the heel of the foot to rise slightly when passing over seams. A11 eyelet 526 formed in one of the arms of the presser foot yoke guides the top thread into position for stitching formation the same being preferably located to one side and slightly to the rear of a needle.

The object of the spring 501 acting between the shoulder 503 and the flange 504 is to give a slight downward pressure "to the shaft .497 and hold the gear 495. in proper relation with the gear 493 to yield downwardly when a seam is passing under the toe of the presser foot, and to yield upwardly vwhen a seam is passing under the heel of the foot.

A more detailed description of the rotary cross stitch forming mechanism carriedby the presser foot is deemedunnecessary sincethe same is fully described in myaforesaid Patent No. 1,464,377, dated August 7, 1923. This cross switch driving mechanism is also useful for operating a trimmer, top

feed, ruffler, or other attachments and in the present improvement it is utilized for operating a'zig-Zag needle. The zig-zag stitching mechanism cooperates with the looper mechanism, two forms of vibrating needle mechanisms beingherein shown, one thereof swinging in a horizontal center located approximately mid-way between the ends of the needle bar, so as to swing upon the center to space the stitches as desired, the other comprising a right angle slide adapted to vibrate the needle and needle bar at right angles to the direction of the reciprocation. For certain classes of work the right angle movement is superior to the swinging movement, the swinginghnovement however being capable of a higher speed and therefore superior for light materials where a. narrowf 1n detail herein any particular form, strucvibration or bight of stitch is suitable. I

, chine frame.

Referring to Figs; 7 to 9 inclusive, in order to vibrate the needle the same gearing construction as shown and described in connection with the cross thread laying mechanism may be employed except that the gear 484 would have twice as many teeth as the gear'483, to give a two-to-one reduction to the shaft 485. That is to say the shaft would operate at half the speed of the crank shaft of the machine. vAt the forward end of the shaft 485 islocated; a triangular cam 527 secured to the shaft by screws 528 passing through the flange 529 ofthe cam. This cam operates in a fork 530 which straddles the cam, the fork being carried by the arm 531 which extends dow y wardly and is secured at 532 by screws 55% to the boss 534 of the swinging bearing 535.

The swinging bearing 535 is bored to re ceive the lower and upper bushings 53 and 54 (Fig. 2) for guiding the needle bar 48,

and has a tapered'circular disc 536 integral therewith" which is seated in a circular socket 537 formed in the face 538 of the head 33 of the machine frame. One-half of the circular socket is formed with a beveled circular plate 539 secured by screws 540 so that theswinging bearing may rock therein and be secured against shake or lost motion.

The second form of mechanism for vibrating the needle above mentioned comprises a shoulder screw 541 and a block 542 supported by it and operating in an elongated slot 543 of the arm 531. The lower end of the arm carries a shoulder screw 544 to which is connected the arm'545 of the right angle dove-tailed slide 546. The slide is integral with a needle bar bearing 547 carrying therbushings 53 and 54 for guiding the needle bar. This dove-tailed slide 546 is guided by a beveled edge plate 548 which is secured by screws 549 to the wall 538 of the end bearing 33 of the ma- The right angle slide constructlon permits the needle bar tobe shifted laterally while it reciprocates in a vertical plane. The link connection 45 with its jointpins 44 and 46 permits either right angle movement or wlnging moveme it as the case may be. 'Iheextent of the movement of the needle bar may be varied by of the operating means may be used to equal advantage for operating a cross-thread ornamental stitch-forming mechanism.

It istobe understood that by' describing ture, or arrangement, it is not intended to limit the invention beyond the terms of the several claims or the requirements of the prior art.

5 Having thus explained the nature of my said invention and described a way of constructing and using the same, although without attempting to set forth all of the forms in which it'may be made, or all the modes of its use, I claim:

1. In a sewing machine the combination of an overhanging machine arm, 'a drive shaft, stitch forming mechanism, a presser foot, cross stitching mechanism supported thereby, a horizontal tubular member carried by said machine arm, and a shaft niounted in said member for operating said cross stitch mechanism from said drive shaft.

2. In a sewing machine the combination of an overhanging arm, a drive shaft, stitch forming mechanism, a presser foot, cross stitching mechanism supported thereby, a tubular member cast in said machine arm, and a shaft mounted in said member for operating said cross stitch mechanism from said drive shaft, said tubular member having means for the passage of oil therethrough. V

3. In a sewing machine, the combination ofa hollow presser foot bar, a presser foot connected thereto, stitch forming mechanism carried by said presser foot, and means including a resiliently mounted shaft located in said hollow presser foot bar to yield vertically relatively to said bar for operating said stitch forming mechanism.

4. In a sewing machine the combination of a main drive shaft, a machine arm, stitch .forming mechanism, a presser foot, and a hollow presser foot bar supporting the same, cross stitching mechanism carried by said presser foot and means including a resiliently supported shaft mounted in said hollow presser foot bar for operating said cross stitching mechanism, said presser foot being hinged for movement relative to said presser foot bar.

In a sewing machine the combination 9- ;of a main drive shaft, cross stitching mechanism, an overhanging machine arm, a tubular member cast in said machine arm and forming a combined shaft housing and bearing, a shaft located in said member and connected to said drive shaft and cross stitching mechanism.

6. In a sewing machine the combination of a main drive shaft, cross stitching mechanism, an overhanging machine arm, a tubular member cast in said machine arm and forming a combined shaft housing and bearing, a shaft located in said member and connected to said drive shaft and cross stitching mechanism, a hollow presser bar,

a presser foot carried thereby, said cross stitching mechanism being supported in said presser foot.

7. In a sewing machine the combination of a main drive shaft, cross stitching mech anism, an overhanging machine arm, a tubular member cast in said machine arm and forming a combined shaft housing and bearing, a shaft located in said member and connected to said drive shaft and cross stitch ing mechanism, a hollow presser bar, a presser foot, means for hingedly supporting said presser foot from said presser bar, said cross stitching mechanism being supported in said presser foot. I

8. In a sewing machine the combination of a main drive shaft, an overhanging machine arm, a tubular member cast in said machine arm and forming a combined shaft housin and bearing a shaft located in said housing and bearing, a shaft located in said member and connected to said drive shaft, a hollow presser bar, a presser foot hingedly supported thereby, cross stitching mechanism supported in said presser foot, and a resiliently supported shaft located in said hollow presser bar and connected to said last shaft and said cross stitching mechanism.

10. In a sewing machine, the combination of a drive shaft, a presser foot, a hollow presser bar supporting the same, stitch forming mechanism carried by said presser foot, and a shaft operated from said drive shaft and mounted in said presser bar and shiftable endwise relatively to said presser bar. 7

11. In a sewing machine the combination of a drive shaft, a hollow presser bar, a presser foot hingedly supported thereby for rocking movement, cross stitching mechanism carried by said presser foot, and a resiliently supported shaft mounted in said presser bar and connected to said drive shaft and mechanism.

12. In a sewing machine the combination of a drive shaft, a hollow presser bar,'a presser foot hingedly supported thereby, cross stitching mechanism carried by said presser foot, a shaft mounted in said presser bar and connected to said drive shaft and mechanism, and resilient means located in said hollow presser bar for permltting movement of said presser foot and shaft relatively thereto. 1

V 13. In a sewing machine the combination of stitching mechanism comprising a needle bar carrying one or more needles, looper mechanism cooperating. with said needles, a

I mechanism cooperating with said needles, a.

hinged presser foot, and cross thread carry- 1 ing means carried by said presser foot and movable in a continuous direction, a hollow presser bar, and a resiliently supported; shaft mounted therein for operating said cross thread carrying means.

15. In a sewing machine the combination of a presser bar, a presser foot hingedly supported thereby, cross thread carrying means supported by said presser foot, and.

means for operating said cross thread carrylngj means. t

16. In a sewing machine the combination of a hollow presser bar, a presser foot hing-t edly supported thereby, cross thread carry ing means supported by said presser foot, and a shaft located in said presser bar and connected to said cross thread carrying means for operating the same. 7 V

17. In a sewing machine the combination of a hollow presser bar, a presser foot hingedly supported thereby for rocking movement, cross thread carrying means supported by said presser foot, gear mechanism connected to said means for operating the same, a shaft located in said presser bar and connected to said gear mechanism, and means for permitting yielding movement of said shaft. 7

18. In a sewing machine, the combination of a machine frame having an overhanging arm, a drive shaft, needle mechanism including a needle bar, an operating shaft for said needle bar carried by said arm and connected to said drive shaft, cross stitching mechanism, a second shaft carried by said arm and connected to said cross stitching mechanism for operating the same, and means for vibrating said needle bar from said second shaft.

19. In a sewing machine, thecombination of a machine frame having an overhanging arm, a drive shaft, needle mechanism including a needle bar, an operating shaft for said needle bar carried by said arm and connected to said drive shaft, cross stitching mechanism, a second shaft carried by said arm and connected to said cross stitching mechanism for operating the same, and means for vibrating said needle bar from said second shaft, said means including a Swinging arm and an eccentric carried by saidv second shaft for swinging said arm.

20. In a sewing machine the combination of a frame having an overhanging arm, a drive shaft, a tube located'in said. arm-,. a shaft housed inv said tube and connected to: said drive shaft, a hollow presser'bar, a shaft located in said presser bar .andcon: neeted tosaid second shaft, a'presser foot supported by said presser ba-r, cross thread carrying means supported by said presser foot, a gear connected to said cross thread carrying means and also to saidlas't. shaft, and a spring. located. between said presser bar and? saidlast shaft: I 1

21., In a; sewing machine a hollow presser bar, a presserqfoot hingedly connected thereto for rocking movement, crossthread carr'ying means supportedby said presser foot, a shaft located in saidl presser bar and connected, to said cross thread carrying pair of shafts, cross stitching mechanisnr connected to the other shaft, and means for vibrating said needle bar from said last named shaft. 7 23. In a sewing machine, the combinationof a drive shaft, a hollow presser bar,-a shaft located in said presser bar'and operated from said drive shaft, and means for permitting yielding movement of said second named shaft vertically relatively to the presser bar.

24 In a sewing machine, the combination of a drive shaft, a hollow presser bar, a rotary shaft extending thru said presser bar and operated from said drive shaft, a presser foot shiftably connected to said bar, and spring means for permitting yieldable movement of said secondshaft upon movement of the presser foot, and stitch forming -mechanism operated by said rotary shaft.

25. The combination of a drive shaft, a shaft operated thereby, a presser bar, a presser foot movably connected thereto, stitch controlling mechanism supported by said presser foot and operated by said second named shaft, and means for permitting yielding movement of said second named shaft upon movement of the presser foot.

26. In a sewing machine, the combination of a drive shaft, a hollow presser bar, a presser foot hingedly supported thereby, a second shaft mounted in the said presser bar and connected to said drive shaft, and resilient means located in said presser bar for permitting movement of said second shaft relatively to the presser bar.

27. In a sewing machine, the combination of a. hollow presser bar, a presser foot hingedly supported thereby, stitch forming means supported by said presser foot and a yieldable shaft located in said presser bar and connected to said means for operating the same.

28. In a sewing machine, the combination of a machine frame having an overhanging arm, a pair of shafts carried thereby, a drive shaft, a needle bar, cross stitching mechanism, means for reciprocating said needle bar from one of said pair of shafts, and mechanism for vibrating said needle bar and for operating said cross stitching mechanism from the other shaft.

29. In a sewing machine, the combination of a machine frame having an overhanging arm, a pair of shafts carried thereby, a drive shaft extending at right angles to said shafts, a needle bar, cross stitching mechanism, means for reciprocating said needle bar from one of said pair of shafts, cam means for vibrating said needle bar from the other shaft, and means for operating said cross stitchingmechan ism from said last named shaft.

30. In asewing machine,the combination of a machine frame comprising a tubular member and an overhanging arm having the metal thereof integrally cast around said member into engagementiwith the exterior Walls of said member, a shaft located in said member, cross stitching mechanism operated from said shaft, and means for operating said shaft. i

31. In a sewing machine, the combination of a machine frame comprising a tubular member and an overhanging arm having the metal thereof integrally cast around said member into engagement with the exter or Walls of said member, a shaft located in said member, a second shaft carried by said arm, a needle bar operated thereby, cross stitching mechanism operated by said first shaft and means for operating said shafts.

Signed at Nyack, N. Y., this 1st day of December 1923. r

JOHN P. WEIS. Ti

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