US1119109A - Feeding mechanism for straight-away and overseaming machines. - Google Patents

Description

L. ONDBRDONK.

FEEDING MECHANISM FOR STRAIGHT AWAY AND OVBRSEAMING MACHINES.

APPLICATION FILED 11017.4, 1902.

3 SHEETS-SHEET 1.

Patented Dec. 1, 1914.

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L. ONDERDONK. FEEDING MECHANISM FOR STRAIGHT AWAY AND OVERSEAMING MACHINES.

APPLICATION FILED NOV. 4, 1902.

Patented Dec. 1, 1914.

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L. ONDBRDONK.

FEEDING MECHANISM FOR STRAIGHT AWAY AND OVERSEAMING MACHINES.

APPLICATION FILED NOV. 4, 1902 Patented Dec. 1, 1914.

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LANSING ONDERDONK, OF NEW YORK, N. Y., ASSIGNOR 'IO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FEEDING MECHANISM FOR, STRAIGHT-A1VAY AND OVERSEAMING MACHINES.

Application filed. November 4, 1902.

To all whom it may concern Be it known that I, LANSING ONDERDONK, a citizen of the United States, residing at New York, in the county of New York, State of New York, have invented certain new and useful ln'iproven'icnts in Feeding li'iechanism for Straightiway and Over-- seaming 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 certain improvements in sewing machines, and has for its principal object an improvement in machines capable of forming both straight away and Zig zag or overedge stitches, in which the character of the stitch may be changed at the will of the operator. A machine of this type is shown in an application filed by Russel G. lVoodward on the 13th day of June, 1901, Serial No. 61,396, patented Feb. 23, 1904, Number 753,187 and in another application filed by the said Voodward on December 3, 1902, Serial No. 133,731 patented June 9th, 1908, No. 890,582. In the machines illustrated in said applica' tions, which are designed principally for use in connection with what is known technically as the closing of shoes, means are provided, under the control of the operator, for shifting from straightaway to zig zag sewing, at will. As heretofore constructed, however, such machines have not embodied any mechanism for changing the amount of throw of the feed dog of the machine, hence the distance between the needle punctures upon each side of the line of the zig zag seam is twice as great as between the needle punctures in straight-away sewing.

The object of the present invention is to provide means for automatically shifting the throw of the feeding mechanism as the character of stitch is changed, so as to preserve at all times regularity in the length of the stitches.

The invention is illustrated in the accompanying drawings, in which,

Figure l is a side elevation of so much of a sewing machine of the type referred to, as is necessary to a complete understanding of the invention, the cloth plate being removed; Fig. 2 is a cross section of the machine showing the parts when the foot lever is in normal position and the machine is adapted to sew straight away stitches; Fig.

Specification of Letters Patent.

Patented Dec. 1, 1914.

Serial No. 130,038.

3 is an end view, partly in section, with the cloth plate removed; Fig. 4 is a detail view of another and preferred form of the connection between the stitch-shifting mecha nism and the feed dog shifting arrangement; Fig. 5 is a view showing more or less diagrammatically a shoe upper stitched on my improved machine.

In these drawings, A represents the base of the machine, from which rises an arm a, carrying at its head the usual parts of the machine, such as the presser bar, which it is not deemed necessary to herein illustrate.

B represents the main shaft, 0 the needle lever, journaled on the stud c, and D the needle bar, these parts being of usual construction and operated in the customary manner.

E represents the cloth plate, under which are the looper and feed mechanisms usually existent in machines of this type, and all operated from the main shaft B in the usual manner. On said shaft B is secured a pinion F, the teeth of which intermesh with those of the gear wheel F, mounted to turn free v on a stud shaft f, secured in the arm a. The outer end of the shaft is provided with an enlarged circular head f, forming a guide and support for an eccentric or cam f secured to and rotating with the gear wheel F. The eccentric or cam f is of the shape shown and rotates between and in working contact with the two arms 9 g of a frame G hung on a pivot stud 9 carried by the arm or standard a, the movements of the eccentric being transmitted to said arms, and effecting an oscillating movement thereof. To the frame Gr is secured by screws z', a segment I having a curved slot 1 therein, the center of which is at times slightly eccentric to the center of a pivot pin j, carried by the lower end of an arm J, depending from and rigidly secured to the rock shaft J, from which movement is imparted to the swinging needle bar gate or frame, by the usual connections.

K represents a bar or link having on its outer end a head embracing a stud 3, which is adjustable up and down in the curved slot 1, to vary the amount of throw of the rock shaft J. This bar or link K has a longitudinal slot 5, through which passes the pivot pin j, the other end of said bar or link K having pivoted thereto on the pin T, a. pivoted frame 8, which has at its forward end slotted side forks 9, embracing the pivot pin on the arm J \Vhen these forks embrace the pivot pin j, the swinging of the segment 1 imparts oscillation to the rock shaft J. Projecting downwardly from this pivoted frame 8 is a plate or lug 10, having on its lower end a pin 11 adapted to lit in a curved slot 6 on a plate 12, screwed to the plate 11, which is pivoted upon a stud 15, secured to a bracket on the machine frame. The plate 14, and the plate 12 are recessed as at 0', so that when thrown in their upward position they engage the pivot pin j on the rock shaft arm J, and thus hold the rock shaft from oscillation when the pivoted frame 8 is out of engagement therewith. The pivoted frame 8 is normally spring pressed upwardly by means of the spring 16 seated in the yoke 17, which at its upper end bears upon the under side of the bar K. The plate ll is pivoted at 19 to the link 20 pivoted at its lower end on the vertically sliding part 21, having on its inner side the projection 22, which cooperates with a projection 23 on the frame G, and prevents movement of the part 22, except when the cam or eccentric f is in a certain position, this being timed so that the cam will only assume this position as the needle is just about to enter the goods in its descent.

The plate 14 has a rearward projection 03 connected to the lever 25, which is pivoted to a bracket 26 on the machine frame in suitable operative connection with a treadle. This lever is normally held with its outer end in the extreme upper position, leaving the plates 12 and 14 in engagement with the pivotpin j, and the pivoted frame 8 and link 7 disengaged from said pin, so that the machine will sew straight away, but when the lever 25 is pulled downwardly, then the parts are shifted to cause the pivoted frame 8 to engage the pivot pin j, and then oscillatory movement will be imparted to the rock shaft, and, therefore, the zig zag movement to the needle.

Up to this point the machine described forms the subject matter of the aforesaid patent of R. G. \Voodward, No. 890,582, and I will now proceed to describe the apparatus forming the subject matter of my invention which relates to the mechanism for automatically changing the length of stitching when the shift is made from straight-away to zig zag stitching, and vice versa.

The feed rocker 100, the feed dog carrying bar 101, the cam 102, for raising and lowering the feed clog 103, the disk 101 with the axially movable pin 105, for transmitting forward and backward movement to the feed dog, and regulating the length of the stitch, are. all similar to the ordinary Union Special sewing machine feeding mechanism, such as illustrated in Patent 299,568.

Upon the outer end of the lower shaft 106 of the feed rocker is fixed a curved slotted segment 107, in the slot 108 of which is adapted to be adjusted a pin or stud 109, embraced by one end of the rod 110, which is attached at the other end to the radially movable crank pin 105.

livoted to the outer end of the pin or stud 109, is one end of a link 111, which at its lower end is pivoted to the end of the crank 112, at its opposite end fixedly sleeved to the rock shaft 113, extending longitudi nally of the bed plate of the machine, its rear end being so connected as to be rocked back and forth by the stitch-shifting mechanism.

As shown in Figs 1 and 3, this shaft 113 has an upwardly extending crank 11%, to which is connected a link 115, attached at its opposite end to a lever, pivoted to a post 117, on the machine frame; the other arm 116 of said lever has pivotal connection with the lever or link 118, which at its opposite end is pivoted to the upright link or arm 119, connected to the lever By this connection, it will be noticed that when the parts are properly timed, when the lever is shifted, the stud 109 will be shifted in the slot 108, thus varying the throw of the feed rocker and, therefore, that of the feed dog. \Vhen the lever 25 is up and the machine is sewing straight away stitching, the stud 109 is in the lower part of the slot 108, and the feed is of normal length; when the shift to zig zag stitching is made the stud rises to the top of the slot, and the stroke of the feed dog is lessened.

In Fig. 4-, the rock shaft 113, is not connected in the manner shown in the other figures. to the lever 25, but is connected to the reciprocating slide 21, in the manner shown, this doing away with the connections 118 and 119, the connection to the lever 25 being through the parts of the shifting mechanism.

In Fig. 5 of the drawings, I have shown a shoe upper indicated at S which is stitched on my improved machine. The line of stitching joining the parts of the upper consists of a straight line of stitching i. and a zig-zag or over edge line of stitching S The lines of stitching S and S are joined so that one follows into the other. In shifting from the straight line of stitching to the xig-zag line of stitching, the length of the feed stroke is varied so that the distance between the adjacent needle punctures in the over seaming stitches which are in line with the needle punctures in the straight-away stitches is made the same as the distance between the needle punctures in the straightaway stitches. That is to say, the distance between the needle punctures s and s in the straight line of stitching S is the same as the distance between the needle punctures s and s in the over seaming line of stitching S While, as above stated, the invention has been devised principally for use in changing the length of stitch as the character of stitch changes from zig zag to straight away and vice versa, still as I believe I am the first to provide means, under the control of the 0pcrator, whereby a change in the length of stitch is automatically effected by the movement of a lever within reach of the operator, and to provide means whereby such change can only take place at a predetermined point, mechanism being provided for preventing the change except at such point, I wish to claim these features broadly.

Various minor modifications and changes in the construction of the parts of the device, may be made without departing from the spirit of the invention.

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

1. In a sewing machine, stitch-forming mechanism including means for forming straight-away and means for forming overs aming stitches, and in which the line of straight-away stitching and one edge of the line of overseaming stitching are in a continuous straight line, means under the control of the operator for shifting from one style of stitching to the other, feeding mecha nism and mechanism for automatically lessening the throw of the feeding mechanism when the change from straight-away to overseaming stitching takes place and cause the distance between consecutive needle punctures along the edge of the seam to remain constant; substantially as described.

2. In a sewing machine, stitch forming mechanism including means for forming straight-away and means for forming overseaming stitches, and in which the line of straight-away stitching and one edge of the line of over-seaming stitching are in a continuous straight line, means under the control of the operator for shifting from one style of stitching to the other, feeding mechanism. and mechanism for automatically lessening the throw of the feeding mechanism when the change from straightaway to overseaming stitching takes place and cause the distance between consecutive needle punctures along the edge of the seam to remain constant; and means for preventing the shift except while the needle is above the goods; substantially as described.

In a sewing machine, stitch-forming mechanism including means for forming straight-away stitches, and means for forming overseaming stitches, and in which the line of straight-away stitching and one edge of the line of overseaming stitching are in a continuous straight line, means under the control of the operator for shifting from one style of stitching to the other, feeding mechanism and mechanism for automatically lessening the throw of the feeding mechanism when the change from straightaway to overseaming stitching takes place and cause the distance between consecutive needle punctures along the edge of the seam to remain constant, said means including a lever adapted to throw into operation mechanism to accomplish the shift; substantially as described.

l. In a sewing machine, stitch-forming mechanism including means for forming straight-away stitches, and means for forming overseaming stitches, and in which the line of straight-away stitching and one edge of the line of overseaming stitching are in a continuous straight line, means under the control of the operator for shifting from one style of stitching to the other, feeding mechanism and mechanism for automatically lessening the throw of the feeding mechanism when the change from straight-away to overseaming stitching takes place and cause the distance between consecutive needle punctures along the edge of the seam to remain constant, and a stop mechanism to prevent the shift except while the needle is above the goods; substantially as described.

In a sewing machine having means for forming straight away or overseaming stitching and means for shifting from one style of stitching to the other, a feeding device including a feed rocker, connections between the driving shaft and the feed rocker, and devices for adjusting the throw of the feed rocker, including a slotted segment on the feed rocker, and a pivot pin movable therein, and a crank and shaft connection between the pivot pin and the shifting mechanism; substantially as described.

6. A sewing machine including in combination means for forming straightaway stitches including a needle, means for vibrating said needle laterally at alternate stitches to form overseaming stitches, means for shifting from one style of stitching to the other, including a lever under the control of the operator, a. feeding device including a feed rocker, connections between the driving shaft and said feed rocker, and means for adjusting the throw of the feed rocker comprising connections with the said lever whereby the throw of the feeding device may be controlled at the will of the operator and while the machine is in operation and the distance between the needle punctures in the overseaming stitches which are in line with the needle punctures in the straight-away stitches, is made the same as the distance between the needle punctures in the straight-away stitches.

T. A sewing machine including in combination. means for forming straightaway stitches including a needle, means for vibrating said needle laterally at alternate stitches to form overseaming stitches, means for shifting from one style of stitching to the other, including a lever under the control of the operator, a feeding device including a feed rocker, connections between the driv ing shaft and said feed rocker, and means for adjusting the throw of the feed rocker comprising connections with the said lever, whereby the throw of the feeding device may be controlled at the will of the operator and while the machine is in operation, and simultaneously with the shifting from one style of stitching to the other; substantially as described.

8. A sewing machine including in combination means for forming straight-away stitches including a needle, means for vibrating said needle laterally at alternate stitches to form overseaming stitches, means for shifting from one style of stitching to the other, including a lever under the control of the operator, a feeding device, and means operated by said lever for controlling said feeding mechanism, whereby the distance between the adjacent needle punctures in the overseaming stitches Which are in line with the needle punctures of the straightaway stitches, is made the same as the distance between the needle punctures in the straightaway stitches.

In a sewing machine, a feeding device including a feed rocker, connections between the drive shaft and the feed rocker, a lever, under the control of the operator, connections between said lever and the feed rocker for adjusting the throw of the latter at the will of the operator, while the machine is in operation, and a stop for preventing said adjustment except at a predetermined point.

In testimony whereof I aflix my signature, in presence of two witnesses.

LANSING ONDERDONK.

\Vitnesses P. F. VVALsH, J. H. HOWELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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