US241918A

US241918A - brautkjam

Info

Publication number: US241918A
Authority: US
Publication date: 1881-05-24
Anticipated expiration: 1898-05-24

Description

' (NoModelJ 2 Sheets--Sheet 1.

J A. BRAUTIGAM. Button Hole Sewing Machine. No. 241,918. Patented May 24, 1881.

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ATTORNEY a. mans. W W 0. a

(. M l.) 2 Sheets-Sheet 2.

J; A. BRAUTIGAM. Button Hole Sewing Machine. No. 241,918. Patented May 24, I881.

ATTORNEY N. Paella. mm M1 UNITED STATES PATENT OFFICE.

JOSEPH A. BRAUTIGAM, OENEW YORK, N. Y., ASSIGNOR TO HIMSELF AND F. G. JANNSOH, OF SAME PLACE.

BUTTON-HOLE SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 241,918, dated May 24, 1881.

Application filed August 6, 1880. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH A. BRAUTIGAM, of the city, county, and State of New York, have invented certain new and useful Improvements in Button-Hole Sewing-Machines, of which the following is a specification.

The object of this invention is to furnish for tailors, manufacturers of clothing, and for family use an improved sewing-machine which can be'used as a common sewing-machine and for sewing button-holes, and in which the stitch can be altered while the machine is at work from a regular lock-stitch to a zigzag buttonhole or embroidery stitch.

The invention consists of the combination, with the reciprocating needle-bar, of an adj ustable cam-disk applied to and operated by an auxiliary shaft by which the needle-bar and its guide-plate are laterally oscillated simultaneously with their vertically-reciprocatin g motion, so as to accomplish, in connection with a slot of the needle-plate, button-hole stitching. The width of the stitch can be regulated by adjusting the cam-disk on the'end of the auxiliary shaft by means of a sleeve and set-screw. The button-hole is guided for laying on the stitches by a vertical pin, which is passed through a hole of the needle-plate by a slidepiece and returned below the same on the withdrawal of the slide-piece.

In the accompanying drawings, which fully illustrate my invention, Figure 1 represents a side elevation of a sewing-machine provided with my improvements, partly in section through the operating parts. Fig. 2 is a top view of part of the table, the work-plate, and the needle-plate of the machine; and Figs. 3 and 4 are respectively a detail end view of the needle-bar and its actuating cam-disk and a detail horizontal section of the same on line :0 a, Fig. 3, the auxiliary shaft and thumb-screw being shown in elevation.

Similar letters of reference indicate corre sponding parts.

In the drawings, A represents the main shaft of my improved button-hole sewing-machine; B, the vertically-reciprocatin g needle-bar of the same, and O a recessed guide-plate, which is pivoted to the upper part of the guidecasing D at the end of the supporting-arm D of the sewing-machine. The needle-bar B receives its vertically-reciprocating motion from the mam shaft A by an intermediate crankdisk and transverse slotted guide-piece, or

otherwise, and moves along a recessed guideplate, 0, to which a lateral] y-oscillatin g motion is imparted by a cam-disk, E, at the end of an auxiliary shaft, E, which latter is arranged parallel to the main shaft A, and supported in bearings of the main arm D and easing D The auxiliary shaft E and cam-disk E receive rotary motion by a transmitting-gearing, a a, from the main shaft A, the cam-disk engaging by a projecting cam, 11, of segmental shape, the guide-plate O of the needle-bar B, so that an oscillating motion is imparted to the same simultaneously with the reciprocating motion which it receives from the main shaft A. The guide-plate of the needle-bar is thrown inward by said cam, and as soon as released therefrom is pressed outward by means of a spiral spring, d, which is interposed between the lower end oftheguide plateC and the casing D, as shown in Fig. 1. The cam-disk E is connected to the end of the auxiliary shaft E by a sleeve, e, which is guided by a side recess on a projecting stud, e. The cam-disk E is adjusted on the end of the auxiliary shaft by a thumbscrew, e which bears on the outer face of the cam-disk and screws into a hole in the center of the end of the auxiliary shaft E, so as to vary the laterally-oscillating motion or throw of the needle-bar B.

A spiral spring, f, is interposed between a collar, f, of the auxiliary shaft E and the sleeve of the cam-disk E, so that on loosening the adjusting thumb-screw the cam -disk is moved outward on the auxiliary shaft until the cam 11 clears the guide-plate of the needle-bar. By the thumb-screw e which projects beyond the face-plate of the casing D and the spiral spring f, the cam-disk E is readily adjusted on the end of the auxiliary shaft E, and thereby the stitch may be changed from a common lock-stitch to a variable embroidery stitch during the working of the machine.

The needle-plate F of the sewing-machine is attached to the bed-plate I, and is provided with a lateral slot, g,which is of sufficientlength even for the extremest side motion which the cam-disk can impart to the needle-bar.

For the purpose of guiding the button-hole to the needle in stitching along the sides and around the ends of the same, aguide-pin, G, is provided, which is thrown up through a pert'oration ot' the needle-plate F, it being guided by a bracket below the needle-plate. The guide-pin G is engaged at its lower enlarged end or head by a laterally-guided slide-piece, H, which is taken hold of at its outer end by the left hand and pushed in or out, so as either to lift the guidepin through the needle-plate or withdraw it to a level with the same, the latter motion being assisted by a spiral spring, It, interposed between the bracket 11 and the head of the pin, as shown in Fig. 1.

The sewing-machine may he used iuthe usual manner as a common sewing-machine by unscrewing the adjusting thumb-screw of the canrdisl; to such an extent that the cam exerts no influence upon the oscillating guide-plate of the needle-bar, in which case the buttonhole attachment is entirely thrown out of use. By moving the cam-disk inwardly or turning the thumbserew the cam of the disk engages the guideplate oi' the needle-bar to a greater or less extent, so as to give the same a larger orsmallerlateral throw for forming the button hole stitches, in which case the face-gimp is supplied in the usual manner by means of a hole and guidegrom e of the needleplate, as shown in Fig. 2.

The machine may he changed with great facility from a common sewinganachine to a button-hole sewing-machine, the change being accomplished by a very simple mechanism, which is superior to the complicated attach ments or special machines heretofore constructed for this purpose.

Having thusdescrihed my invention, 1 claim asnew and desire to secure by Letters Patent- 1. In a sewing-machine, the combination, with the main shaft and the vertically-reciprocating needle-bar ll, of the oscillating vertical guide-plate (J, for carrying the needle-bar, the spring (I, and the rotary disk 1), operating in direct contact with the vertical guide-plate of 5 it. in a sewing-machine, the combination 01' the auxiliary shaft E, having guide-stud c, with a cam-disk, E, having a recessed guidesleeve, c and the springf, all substantially as described 4. In a sewing-machine, the combination, with the bed-plate I and throat-plate F, of a vertical guide-pin, (l, a laterally-guided slidepieee, ll, t'orlit'ting the pin, and a spring for depressing the same, substantially as described.

In testimony that I claim the foregoing as my invention 1 have signed my name, in presence of two witnesses, this 4th dayoi' August, 1880.

JOSEPH A. BRA UT IGrUtL Witnesses:

Frmmcmcn' G, JANNSCII, PAUL (tonricL.