US1312363A - Sewing machine - Google Patents

Description

D. S. SEYMOUR.

SEWING MACHINE APPLICATION FILED AUG.I6. ms.

Patented Aug. 5, 1919.

6 SHEETS-SHEET l.

D. S. SEYMOUR.

SEWING MACHINE APPLICATION FILED AUG.16.1916.

1 ,3 12,863. Y Patented Aug. 5,1919.

6 SHEETS-SHEET 2.

a; D N N D. S. SEYMOUR.

SEWING MACHINE APPLICATION FILED AUG.16. I9I6.

1,312,363. Patented Aug. 5,1919.

6 SHEETSSHEET 3- e6 lmuamtoz WWI woo, v

D. S. SEYMOUR.

SEWING MACHINE APPLICATION FILED AUG.16. 1916.

l 1 $63. Patented Aug. 1919.

6 SHEETS-SHEET 4.

D. S. SEYMOUR.

SEWING MACHINE APPLICATION man AUG.I6. I916.

Patented Aug. 5, 1919.

6 SHEETS-SHEET 5.

D. S. SEYMOUR.

SEWING MACHINE APPLICATION FILED AUGJG. 191a.

Patented Aug. 5,1919.

6 SHEETS-SHEET 6 amuewtoz UNITED STATES PATENT DUDLEY S. SEYMOUR, 01? OAK PARK, ILLINOIS, ASSIG-NORTO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SEWING-MACHINE.

Which the following is a description, refer-' ence being had to the accompanying drawing and to the figures of reference marked thereon.

TlllS lnventlon relates to sewing machmes and more particularly to that class of sewing machines adapted for use in stitching stay strips to the heel seams of shoe uppers.

In applying stay strips to shoe uppers. the sections of the upper are first superimposed and seamed by a line of through-andthrough stitches. The sections of the upper are then opened out so as to lie in the same plane, and the article is fed through another sewing machine and the stay strip applied thereto, the strip being secured by two spaced lines ofstitches. The seam of the article is then pounded so as to flatten the same as much as possible. The pounding operation frequently results in causing the lines of stitches which secure the stay to the upper to become irregular, or, in other words, to

have a greater distance between the lines of stitches at one point than at another.

The principal object of this invention is,

therefore, to provide a sewing machine for applying the stay strips, by means of which the seam will be flattened previous to the stitching of the stay, whereby a uniform Width between the lines of stitching will result and thereby'subsequent pounding operations rendered unnecessary.

Another object of the invention is to pro' vide a pressure device for flattening the seam,which device is disposed in advance of the needles and has its downward thrust directed against the front portion of the feed dog, together with a movable support which moves with the up and down movements of the feed dog and remains in contact therewith to support the front end of said feed dog against the thrust imparted thereto by said pressure device.

A further object of the invention is to I Specification of Letters Patent. Patented Aug. 5, 19119. Application filed August 16, 1916. Serial No. 115,205

machine to be readily used as a two-line machine without the employment of said pressure device.

These and other objects will in part be obvious, and will in part be hereinafter more fully disclosed.

In the accompanying drawings, which show by way ment of my 1nvention,

Figure 1 is a front elevation of a sewing machine having my improvements applied thereto; v

Fig. 2 is a top plan view of the machine, parts thereof being broken away and the cloth plate removed to clearly show the mechanism under said cloth plate;

Fig. 3 is an enlarged side elevation, parts thereof being shown in section;

Fig. 4 is an enlarged front elevation, parts thereof being shown in section;

Fig. 5 is an enlarged detail plan view, showing in full lines the pressure device moved to its inoperative position, and in dotted lines the pressure device in its operative position;

Fig. 6 is a detail view showing the means for simultaneously rocking the looper support and the movable feed dog support; Fig. 7 is a-detailtop plan view showing the relative positions of the shoe upper sections, the stay strip, the presser foot and the pressure device for the same;

Fig. 8 is a view showing more or less diagrammatically, the relation' of the needles and 'loopers in one extreme position;

Fig. 9 is a similar view, but showing the parts in the other extreme position;

Fig. 10 is a detail front elevation, showing the relation between the pressure device and movable support for thefront end of the feed dog;

Fi 11 is a detail sectional view, showof illustration one embodiing t e shoe upper sections opened previous to the application of the stay; and

Fig. 12 is a detail sectional view of the shoe upper sections, showing the applica tion of the stay.

This invention comprises broadly a sewing machine including a pair of spaced needles and loopers, respectlvely, cooperating therewith, a presser foot and a feed dog- Disposed in front of the needles is a vertically yieldable pressure device which carries at its lower end a roller for engagement with the seam of the article. This roller is T disposed directly above the front end of the feed dog. Consequently the downward thrust of this roller is imparted to the front end of the said feed dog. In order to maintain the teeth of the feed dog in a horizontal plane and also to prevent said feed dog from being broken, due to this downward pressure, I have provided a movable support for the front end of the feed dog. This feed dog has the usual four motions, and means are provided for maintaining this support in constant engagement with the feed dog and for moving said support upwardly and downwardly in timed relation with the up and down movements of the feed dog. This pressure device is supported on the overhanging arm of the machine in such a manner that said device may be readily shifted to a position away from the needles.

Referring more in detail to the drawings:

The sewing machine comprises a base 5 from which rises a standard 6. An overhanging'arm 7 is carried by said standard, and in the forward end of this overhanging arm is mounted the usual needle bar 8, which carries at its lower end a pair of spaced needles 9 and 10. These needles are disposed one behind the other and ofiset one from the other, so that a line passing through both needles will be disposed at an angle to the line of feed, as will be readily understood.

A needle lever 11 is fulcrumed on the overhanging arm at 12, and is connected to the needle bar by the usual link 13. This needle lever is actuated by a strap which cooperates with an eccentric on the ma-inshaft 14. Supported on the base 5 is the usual cloth plate or work support 15. Also supported in the forward end of the overhanging arm is the usual presser bar 16, which carries a presser foot 17. Cooperating with the needles and presser foot is a feed dog 18, supported at its rear end on a feed bar 19. This feed bar is in turn connected to the feed rocker 20, and this rocker is in turn actuated by the pitman 21 from the main shaft 14. The pitman 21 gives the back and forth movements to the fed dog. The feed dog is raised and lowered by the usual eccentric 22 mounted on the main shaft 14 and coiiperating with the feed bar 19. From the above, it will be observed that the feed dog is given the usual back and forth and up and down movements.

Coiiperating with the needle 9 is a looper 23 and cooperating with the needle 10 is the looper 24. These loopers are fixed to a looper holder 25, which is pivoted by a stud 26 to a looper carrier 27. The looper holder 25 is connected by a link 28 to the extension 29 of the needle lever 11, and as a result the needle lever imparts loop-taking and loopshedding movements to said loopers. The looper carrier 27 includes a shaft 30, which is disposed parallel with the main shaft 14 and is journaled in bearings 31, 31, fixed to the base 5. The shaft 30 is rocked so as to give the loopers their needle-avoiding movements, as is common in machines of this character. This shaft 30 is rocked from the main shaft 14 through the medium of an arm 32 fixed to said shaft 30 and actuated by an eccentric mounted on the main shaft 14.

The above constructions are well known in the art, and are present in the Union Special type of machines.

Supported by the forward end of the overhanging arm 7 is a forwardly extending bracket 33 and pivoted to this bracket by a vertically disposed pin 34 is a frame 35. This frame includes spaced upper and lower arms 36 and 37 and journaled in these arms is apresser bar 38, which is free to slide up and down relative to said frame. This presser bar is provided with a stop collar 39, and disposed between this collar and the upper arm 36 is a coil spring 40 which exerts a downward pressure on said bar. An auxiliary presser bar 41 is also journaled in the frame 35 and this bar is likewise urged downwardly by' a spring 42 disposed around said bar between a stop collar 43 and the upper arm 36. A U-shaped frame 44 has the arms thereof bored to re.- ceive the presser bars 38 and 41, and the lower arm of this frame 44 is secured to said bars by set screws 45 and 46. a

It will thus be seen that thespring 42 of the auxiliary presser bar exerts a downward pressure on said bar, and this pressure is conveyed by the lower arm of the frame- 44 to the main presser bar 38. A roller 47 is carried by the upper arm of the frame 44, and a cam lever 48 fulcrumed on the upper arm 36 of the frame 35, cotiperates with the roller 47 to elevate the frame 44, and thereby elevate the main presser bar 38. The frame 44 is provided with a rearwardly and downwardly extending latch 49, which cooperates with a latch seat 50 to lock the above mentioned parts in their operative positions.

It will be seen that the construction above described constitutes a pressure device; thatit is disposed in front of the needles; that the frames 35 and .44 cooperate to form a swinging gate which supports the presser bars 38 and 41; and that the latch 49 positively locks said gate in its operative position, so that said gate can be only swung about its pivot when said gate is lifted through the medium of the cam lever 48.

Secured to the lower end of the presser bar 38 is a foot 51. This foot is "provided with rearwardly extending arms 52, 52. Fixed in these arms is a bearing pin 53. Loosely journaled on this hearing pin is a pressure roller 54, which extends below the lower surface of the foot 51. This roller is ing bearing arm 55. A movable support cooperates with the under surface of the bearing arm 55 and comprises a roller 5-6 jour naled on a crank arm 57 fixed to a shaft-58' which isjournaled in bearings 59 secured to the base 5 of the machine frame, The roller 56 is maintained in constant engagement with the bearing arm 55, and during the up and down movements of the feed dog 18, the shaft 58 is rocked so as to move the roller 56 up and down in time with the up and down movement-of said feed dog. During the backward and forward movements of the feed dog 18 the bearing arm 55 thereof will, of course, have rolling contact with the roller 56'. In order, therefore, to rock the shaft 58 there is provided an eccentric 59 on the main shaft 14. This eccentric cooperates with a two-part bearing block 60, which has sliding engagement with the arms 61, 61, of a forked arm 62. The arm 62 is in turn fixed to the rock shaft 58 by a set and lower the roller 56 in timed relation with the up and down movements of the feed dog 18.

In operation, the pressure device is first lifted by the cam lever 48 so as to permit the article which is to be stitched to be p0- sitioned under the presser foot. The article consists of two sections A, A, which have been previously joined by a line of throughand-th'rough stitches s. A stay strip S is positioned under the seam of the article. The pressure device is then lowered to its operative position and the feed dog will then carry the article past its stitch-forming mechanism. The downward pressure of the pressure roller 54 is considerably greater than the downward pressure of the presser foot 17, and as a result the pressure roller 54 will flatten out the seam of the article previous tothe application of the stay strip As a result the two lines of stitching L, L, formed by the needles 9 and 10 and the loo- pers 23 and 24 will in the finished article have a uniform width therebetween throughout the entire length of the seam,

and furthermore the seam in the finished article will, by reason of the pressure device, be sufliciently flat to avoid the necessity of pounding the seam.

' ticle previous to the strip bein It is obvious that minor changes in the details of construction and the arrangement of parts may be made, without departing from the spirit of this invention, as set forth in the appended claims.

' Having thus described my invention, What I claim as new and desire to secure by Letters Patent, is

1. In a sewing machine for securing a stay strip to a previously seamed article, the combination with a presser foot, a stitch-forming mechanism and a feeding mechanism, of a device disposed in advance of the presser foot and vertically movable independently thereof for'flattenin'g the seam of the arsecured thereto by the stitch-forming mec anism.

2. In a sewing machine for securing a stay strip to a previously seamed article, the combination with a presser foot, a stitch-forming mechanism and a feeding mechanism, of a device disposed in advance of the presser foot for flattening the seam of the article by the stitch-forming mechanism, said device including means for exerting a greater downward pressure on the seam than the downward pressure on the presser foot.

3. In a sewing machine for securing a stay strip to a previously seamed article, the

combination with the presser foot, a stitchforming mechanism and a feeding mechanism, of a-roller disposed in advance ofthe presser foot, and means for impartin a downwa'rdpressure to said roller for flattening the seam of the article previous to the strip being secured thereto by the stitchforming mechanism.

4. In a sewing machine for securing a stay strip to apreviously seamed article, the combination with a presser foot, a s-titch-forming mechanism and a feeding mechanism,

of a device disposed in advance of the presser foot'for flattening the seam of the article previous to the strip being secured thereto by the stitch-forming mechanism, said device being movably mounted whereby the sfame may be shifted away from the presser oot.

5. In a sewing machine for securing a stay strip to a previously seamed article, the combination with a presser foot, a stitch-forming mechanism and a feeding mechanism including a feed dog, of a device disposed in advance of the presser foot, vertically movable independently of said presser foot and coijperating with the feed dog for flattening the seam of the article previous to the strip being secured thereto by the stitch-forming mechanism. K a

6. In a sewing machine for securing a stay strip to a previously seamed article, the combination with a presser foot, a stitch-forming mechanism and a feeding mechanism including a feed dog, and means for giving to said dog up and down and back and forth movements, of a device disposed in advance of the presser foot and cooperating with the feed dog for flattening the seam of the article previously to the strip being secured thereto by the stitch-forming mechanism, and means separate from the main support of the feed dog for supporting said feed dog against the downward pressure of said device.

7. In a sewing machine for securing a stay strip to a previously seamed article, the combination with a presser foot, a stitch-forming mechanism and a feeding mechanism including a feed dog, and means for giving to said dog up and down and back and forth movements, of a device disposed in advance giving to said dog up and down and back and forth movements, of a device disposed in advance of the presser foot and cooperat-- ing with the feed dog for flattening the seam of the article reviously to the strip being secured thereto by the stitch-forming mechanism. a roller engaging the under face of the feed dog, and means for maintaining the roller in engagement with the feed dog during the up and down movements of the latter. 1

9. In a sewing machine for securing a stay strip to a previously seamed article, the combination with a presser foot, and stitch forming and feeding'mechanism, of a pressure device in advance of the presser foot for flattening the seam, a laterally movable gate upon which said pressure device is mounted, a latch for said gate, and means for simultaneously elevating the pressure device and the latch for permitting the gate to be swung laterally.

10. In a sewing machine for securing a stay strip to a previously seamed article, the combination with a presser foot, and stitch forming and feeding mechanism, of a pressure device in advance of the presser foot for flattenin the seam, a laterally movable gate upon which said pressure device is mounted, a latch for said gate, and means for simultaneously elevating the pressure combination with a presser foot, a stitch forming mechanism and a feeding mechanism including a feed dog, means for giving to said dog up and down and back and forth movements, of a device disposed in advance of the presser foot and cooperating with the feed dog for flattening the seam of the article previously to the strip being secured thereto bv the stitch-forming mechanism, a roller engaging the under face of the feed dog, a crank arm carrying the roller, and means for operating the crank arm for maintaining the roller in engagement with the feed dog during the up and down movements of the latter.

12. In a sewing machine for securing a stay strip to a previously seamed article, the combination with a presser foot, a stitch forming mechanism and a feeding mechanism including a feed dog, means for giving to said dog up and down and back and forth movements, of a device disposed in advance of the presser foot and cooperating with the feed dog for flattening the seam of the article previously to the strip being secured thereto by the stitch-forming mechanism, a roller engaging the under face of the feed dog, a crank arm carrying the roller, a shaft on -which the crank arm is mounted, and means for rocking the shaft whereby the roller is moved up and down in timed relation to the up'and down movements of the feed dog. In testimony whereof, I aiiix my signature in the presence of two witnesses.

DUDLEY S. SEYMOUR. Witnesses:

S. Gnoncn TATE, JOHN W. MCLAIN.

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