US667086A - Stitch-finishing machine. - Google Patents

Description

No. 667,086. Patented Ian.'29, l90l.

I J. B. HADAWAY.

(No Model.)

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20 May, 1896.

NrrE STATES ATENT FFICE.

JOHN B. HADAWAY, OF BROOKTON, MASSACHUSETTS.

STITCH-FINISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 667,086, dated January 29, 1901.

Application filed January 5, 1900. Serial No. 419. N modem To all whom, it may concern:

Be it known that I, JOHN B. HADAWAY, a citizen of the United States, residing at Brockton, in the county of Plymouth and State of Massachusetts,have invented certain new and useful Improvements in Stitch-Finishing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and I 5 for automatically locating the stitch-finishin g tool with relation to the stitches of the seam to be acted on, such a machine being shown in Reissue Letters Patent of the United States No. 11,538, granted to me on the 12th day of The machine of this patent is a stitch-separating machine and embodies a tool for marking or creasing the work in line with the intervals between the stitches. In this machine and in all subsequent machines wherein the stitch-separating tool is automatically located with relation to the stitches such locating of the tool is controlled by the intervals between the stitches, the tool being lightly moved over the line of stitches until the working end thereof finds a space between the stitches, at which time its lateral movement is arrested, and while its working end still remains in the space or interval between two adjacent stitches said tool is forced downward to form a crease or indentation between the stitches, thus, as it is called in the art, separating the stitches. The machine of the patent has been found to be generally satisfactory in its operation, and constant use has demonstrated that the working end thereof will automatically find and locate itself in the intervals between the stitches, whether such stitches be of uniform length or, as it often happens, slightly varying in length, and the 5 piece of work after having been subjected to the operation of said machine will have the intervals between the stitches marked and creased and the stitches separated. The tool of this machine, however, acted only upon the spaces or intervals between the stitches and the surface of the work in line with such intervals.

The object of the present invention is to produce a stitch shaping and finishing machine for shaping the crowns of stitches and marking or indenting the surface of the work in line with the intervals between the stitches and wherein the automatic locating of the working end of the stitch shaping and indenting toolis dependent upon and controlled by the crowns of the stitches and not by the intervals or spaces between the stitches.

To the above end the present invention consists of a machine provided with astitch shaping and indenting tool, combined with means for automatically locating the working end of said tool on the crowns of the stitches,whether such stitches be of uniform or varying length.

The present invention further consists of the devices and combinations of devices which will be hereinafter described and claimed.

The present invention is shown in the accompanying drawings, wherein I have shown it as being embodied in the machine disclosed in the patent hereinbefore mentioned, and in which- Figure 1 shows in front elevation portions of said machine with my improved stitchshaping and indenting tool embodied therein. Fig. 2 shows asection of the machine as shown in Fig. 1, taken on the linewwin Fig. 1. Fig. 3 shows a broken front elevation of myimproved stitch shaping and indenting tool somewhat enlarged. Fig. 4 shows in side elevation the lower part of said tool.

Similar reference characters will be used to designate corresponding parts throughout the specification and drawings.

In the drawings, 1 indicates a lever fulcrumed at 2 on the slide 3, arranged to reciprocate in a guideway 4:. The tool-stock 5 is pivoted at 6 to the front of the lever 1. A lever 7, fulcrumed at 8, engages at its forward end a projection 9 on the lever 1 for the purpose of positively depressing the lever 1 to impart to the stitch shaping and indenting tool a downward movement to cause the grooved working end thereof to engage the line of stitches to successively shape the crowns thereof and indent the intervals between the stitches. A spring 10 is connected by means of an adjusting-screw 11 to the lever 1 and acts to yieldingly depress the lever 1 and the tool-stock 5, pivoted thereon, so as to cause the grooved end of the stitch shaping and indenting tool to rest lightly upon the stitches of the seam during the lateral or locating movements of said tool, whereby the groove in its end will automatically engage the crowns of the stitches. 12 is a work-support and 13 is an edge-gage.

All of the foregoing parts except the tool are shown to be, and preferably will be, construct ed, organized, and operated in a mannersimilar to the corresponding parts of the machine of the patent hereinbefore referred to.

In the machine of the patent while the stitchseparating tool is held yieldingly in contact with the line of stitches by means of the spring 10 the slide 3 has imparted thereto several lateral reciprocations, causing the working end of the tool to move along over the stitches until said end falls into the interval between two stitches, in which interval it will remain by reason of the fact that the tool-stock 5 is pivotally supported on its le- Ver 1, notwithstanding that the slide 3 and lever 1 may not have completed their lateral reciprocations. After the tool has been located in the interval between two stitches, as thus described, the lever 7 is rocked about its fulcrum S, and, acting upon the projection 9 of the lever 1, positively forces the lever 1 downward, causing the stitch-separatin g tool to form a mark or indentation in the intervals between the stitches, thus, as it is called in the art, separating the stitches.

Myimproved stitch shaping and indenting tool 14: is shown in enlarged views in Figs. 3 and 4 and is, except as to its working end, substantially the same as the stitch-separating tool of the machine of the patent hereinbefore referred to, and is supported in the tool-stock 5 and actuated substantially as is the tool in said machine. As shown in Figs. 3 and at, it will be noted that instead of providing the tool with a single V-shaped end designed to be automatically located in the intervals between the stitches and controlled in its locating movements by such intervals 'and to mark, crease, or indent the intervals between the stitches only I have provided my improved tool with a stitch-shaping groove 15, which extends from the front to the back of the working end of said tool, and upon each side of the groove 15 I have provided ribs or blades 16, the groove 15 acting to engage successively the crowns of the stitches during the locating movements of said tool, and by the positive downward thrust ofsaid tool the groove resting upon the crown of the stitch will shape the crown and impart thereto a rounded appearance, while the blades upon opposite sides of the groove will act to mark or indent the work.

It is to be noted that the working end of my improved stitch shaping and separating tool is controlled as to its locating movements by the crowns of the stitches and not by the intervals between the stitches, and that whether the stitches be of uniform or varying length my improved tool by its engagement with the highest part or the rounded top or crown of the stitch will remain in contact with the crown of the stitch, notwithstanding that the lever 1 and the slide 3 may not have completed their lateral reciprocations, which give the locating movements to the too], for after the tool has engaged the crown of a stitch the further lateral reciprocations will cause the tool-stock to swing about its pivot.

In the present machine whetherthe stitches be of uniform or slightly-varying length is immaterial, for in any event the grooved end of the tool will impart a uniform shape and appearance to the crowns of the stitches, and the creasing or marking of the work is not in any sense dependent upon the distance between the intervals in the work.

In the operation of the machine the lever 1, carrying the tool-stock 5, is actuated in all respects substantially as the lever carrying the separating-tool of the machine of the patent hereinbefore referred to, and when the piece of work to be operated upon is properly supported upon the work-support 12 the lateral locating movements imparted to the tool 14: by the lateral reciprocations of the slide 3 will cause the groove in said tool to engage the crown of a stitch, upon which it will be lightly held by the spring 10, thus locating the working end with relation to the crown of the stitch. After the tool has been thus antomatically located and while it is held lightly engaging the crown of a stitch, as described, the lever 7 will be rocked about its fulcrum 8, and, engaging the lug 9 of the lever 1, it will impart to the tool-stock 5 a further and positive downward movement, thus causing the groove 15 of the working end of the tool to shape and form the crown of the stitch, while the blades 16 will mark and indent the work.

I am aware that it has been proposed to pro vide in sewing-machines for use in the manufacture of harness and other heavy work a grooved tool for the purpose of burying or depressing the crowns of the stitches below the surface of the work; but in such prior machines the tool was in no sense intended as a separating or shaping tool, nor was any means provided whereby the working end of said tool was automatically located with relation to the stitches whether such stitches were of uniform or varying lengths.

Having thus described the construction and mode of operation of my invention, I claim as new and desire to secure by Letters Patent of the United States In a machine for shaping and indenting stitches, the combination with a work-supec nos 8 In testimony whereof I affix my signature in presence of two witnesses.

JOHN B. HADAWAY.

Witnesses:

T. HART ANDERSON, A. E. WHITE.

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