US373937A

US373937A - maeegeaf

Info

Publication number: US373937A
Authority: US
Publication date: 1887-11-29
Anticipated expiration: 1904-11-29

Description

(N v M d 11 t o e F MARKGRA-F' 3Shees Sheet 1 GLOVE SEWING MAOEINE.

No. 373,937, Patented Nov. 29', 1887.

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No. 373,937. Patented Nov. 29,1887.

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UNITED STATES PATENT Orrrca.

FRANZ MARKGRAF, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF, TO EDMUND PALTZ, OF SAME PLACE.

GLOVE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 373,937, dated November 29, 1887. Application filed August 11, 1886. Serial No. 940,595. (No model.)

To all whom it may concern.-

Be it known that I, FRANZ MARKGRAF, of the city, county and State of New York, have invented certain new and useful Improvements in Glove-Sewing Machines, of which the following is a specification.

This invention relates to an improved glovesewing machine of that class in which the material to be sewed is passed through between two intermittentlyrotating cups or disks by which it is held and exposed to the action of the reciprocating needle orlooper; and the is supported in a bracket-bearing, G

invention consists, essentially, in the arrangement of the spring-fingers and gage extending across the disks back of the fingers,means for imparting positive step-by-step rotary motion to the outermost cup or disk, means for guiding and protecting the reciprocating needle, and of certain details of construction and combination of parts,which will be fully described hereinafter, and finally be pointed out in the claims.

In the accompanying drawings, Figure 1 represents a plan of my improved glove-sewing machine, parts being broken out. Fig. 2 is a side elevation, partly in section. Fig. 3 is a vertical longitudinal section through the cups. Fig. 4. is a plan of the same, with the supporting-arm of the outer disk broken away. Fig. 5 is a vertical transverse section on line 00 m, Fig. 3; and Fig. 6 is adetail plan of a por-v tion of the feed cups or disks,drawn on alarger scale.

Similar letters of reference indicate corresponding parts.

A represents the supporting casing of my improved glove-sewing machine. The driving-shaft by which power is transmitted to the diiferent Working elements of the machine 'passes transversely over the supporting-casing and actuates the different parts by any approved mechanism, such as are shown and de scribed in glovesewing machines of this class heretofore patented. At one end of the supporting-casing A are supported two feed cups or disks, 0 G, of which the shaft of the disk 0 The disk 0 receives intermittent rotary motion by the usual pawl-and-ratchet device operated from the driving-shaft, which are well known and need no further description in this connec tion. The reciprocating needle-bar D and the looper E are also made of the usual construction and operated by the usual actuating mechanism in the manner well known heretofore. The other feed cup or disk, 0, is supported on a curved arm, 0 that extends horizontally through the casing. This disk, in contradistinction to the feed-disks of glove-sewing machines heretofore in use, is not moved by frictional contact with the feeddisk C, but receives positive intermittent rotary motion by special mechanism, which is operated by the needle-bar D, and which consists, mainly, of a lever, G, that is fulcrumed to the fixed covering-disk 0* of the feed-cup (),and to a screw, C passing through the supporting-arm C of said disk.

Theouter end of the lever G is provided with a hinged and spring-actuated pawl, g, which engages teeth of a ratchet-wheel, g,

, formed at any part of the circumference on the feed-cup G. The opposite upwardly-extending end of the lever G is pressed by a spring, 9, against the arm 9 which arm is acted upon by a beveled lug or projection, 9 attached to the needle-bar D. By the return motion of the reciprocating needle-bar the fulcrumed lever G is oscillated by the beveled lug so that a forward motion is imparted by the pawl g to the ratchet-wheel g of the feed-cup 0. During the forward motion of the needle-bar the beveled lug clears the pivoted arm and thereby causes, by means of the spring 9", the oscillating of the lever G in opposite direction, so as to move the pawl 9 over the teeth of the ratchet-wheel ready to engage the same at the next return motion of the reciprocating needlebar.

I do not confine myself to the special construction shown for imparting positive intermittent rotary motion to the outer feed-cup, as any other suitable mechanism may be used for this purpose. The motion of the outer feed-cup, G, is so timed that it moves simultaneously with the inner feed-cup, and there by feeds the leather to be sewed in a regular and reliable manner forward between the disks or cups.

To a curved arm, H, that extends from the casing A over the feed-disk O at that side where the fabric to be sewed enters the feed disk, is readily attached a socket, that carries a curved and pointed finger, H, which extends over the point of tangential contact of the feed-disks, as shown clearly in Figs. 4 and 6. A second finger, H of similar shape, is applied to a curved spring-arm, H, on the plate 0 of the disk 0. These two fingers H and H are located immediately above and close to the circumference of the feed-disks G C, and serve for the purpose of pressing the edges of the leather or other fabric to be sewed closer together in the same manner as if they were to be fed by the fingers of the hand. The edges of the leather are thereby held firmly in position for the action of the needle, which passes transversely through the fabric immediately below the fingers H H Above the fingers, at some distance in front of the same, the arm H is provided with an adjustable gage, I, that extends across the space between the feed-disks, as shown in Figs. 4 and 6, and which serves for regulating the distance from the edge at which the needle is to sew the fabric. By steadying the gage higher or lower the free seam-stitch is formed farther from or nearer to the edge of the fabric, as required.

The needle (I of the needle-bar is supported in position, before and after the same has pierced the fabric, by suitable guides,of which one is formed in the top surface of the plate 0, and consists of the groove i. The other consists of the arm M, which is pivoted at M to swing vertically, and is pressed upward by a spring, llP, having one end fastened toa projection, N, on the front of the case and the other end below said arm M. The said arm is bent at right angles at its front end and provided with a groove, i, which is in line with the groove in the upper surface of the plate C. From the front end of the projection N the arm 0 projects, which has its free end bent downward and forms a stop, preventing the swinging arm M from being swung up too high by its spring. Said arm M must be lowered during the forward motion of the needle into the position shown in Fig. 3, which is accomplished by the laterally-extending pin 1'" of the needle-bar, 'which engages the beveled flange or cam-edge i on the top of the swinging arm M, as shown in Fig. 3. The needle is thus guided so as to pierce the leather without vibrations or other irregularities.

As there is more or less danger of the end of the rocking looper E catching the needle during the time that the needle is not in the groove i on the plate G, as the looper swings over the needle when the same is in the said position, I have provided a device for pressing the needle down in said groove and preing on the arm, presses the same upward and against a pin, R, projecting laterally from the lug g on the end of the needle-bar and up over the arm P. A spring-wire, S, is fastened on the upper end of that shank of the arm P extending toward the plate 0, and has its end flattened, the said shank being provided with a slight depression, S, for receiving the flattened end S of the said wire. As the needlebar moves forward, the pin R passes under the spring-wire S and raises the flattened end of the same. During the return movement of the needle bar the pin R passes over and presses on the spring-wire,and thereby presses the forwardly-projecting shank of the arm P down and presses the lateral projection 1? upon the plate 0* and the needle, and thus confines the needle in its place and prevents the looper from catching on the needle.

A portion of my improved glove-sewing machine is the same as other machines, partly on the same principle, the essential features being, however, the fingers for holding the leather or other fabric and gage for regulating the depth of the stitch from the edges, the positive motion imparted to the outer feedcnp which is necessary for overcoming the increased pressure exerted on the fabric by the fingers, and the device for guiding and-steady ing the motion of the needle.

Having thus described myinvention, I claim as new and desire to secure by Letters Patcut-- 1. In a glove-sewing machine, the combination, with rotary feed-cups, of a fixed and pointed finger on each cup, substantially as shown and described.

2. In a glove-sewing machine, the combination, with rotary feed-cups, of a fixed finger applied to onecup and a yielding finger applied to the other cup, both being located above and transversely to the path of the needle, substantially as set forth.

3. In a glove-sewing machine, the combination, with rotary feed-cups, of a fixed finger applied to one cup, a corresponding yielding finger applied to the other cup, and a gage extending transversely across the space between the cups at some distance back of the fingers, substantially as set forth.

at. In a glovesewing machine, the combination, with rotary feed-cups, of a fixed finger applied to one cup, a yielding finger applied to the other cup, and a transverse verticallyadjustable gage that is located at some distance back of the fingers, substantially as set forth.

5. In a glove-sewing machine, the combination of rotary feed-cups and mechanism for imparting to each cup positive rotary motion, a fixed curved and pointed finger applied to one cup, and a yielding finger on the other cup, so that a friction is exerted by the fingers on the fabric, substantially as set forth.

6. The combination, in a glove-sewing machine, of rotary feed-cups, a reciprocating needle-bar carrying a needle, needle-guides arranged on each cup, and mechanism for operating the needle-bar, substantially as shown and described.

7. The combination, with a rotary feed-cup having a needle-guide, areciprocating'needlebar, means for raising and lowering said needle-guide so as to move out of the way of the needle-bar, and a second rotary feed-cup having a fixed needleguide, substantially as set forth. 7

8. In a glove-sewing machine, the combination, with rotary feed-cups having fingers for holding the fabric, a transverse gage for the same, and of a reciprocating needle-bar and a looper, substantially as set forth. I

9. In a glove-sewing machine, the combination, with the rotary feed cups and reciprocating needle, of a needle-presser operated from the needle-bar, substantially as shown and de scribed.

10. In a glove-sewing machine, the combination, with the rotary feed-cups and reciprocatory needle, of a needle-guide, a needle-bar,

a rocking arm provided in its free end with a laterally-extending projection extending over tion, with rotary feed-cups and a recipro- 3o catory needle, of a rocking arm provided on its free end with a lateral projection extending over the guide-groove for the needle, a spring-wire on the said rocking arm, the end of which wire is flattened, and a pin projecting from the reciprocating needle-bar and extending over the said rocking arm, substanstantially as shown and described.

' In testimony that I claim the foregoing'as my invention I have signed my name in presence of two subscribing witnesses.

FRANZ MARKGRAF.

Witnesses:

OSCAR F. GUNZ, CARL KARI.