US1130492A - Slip-trimming attachment for fair-stitching machines. - Google Patents

Description

F. A. DEVEREAUX.

SLIP TBIMMING ATTACHMENT FOR FAIR STITGHI'NG MACHINES.

APPLICATION FILED APB.20, 1914.

1,1 30,492. Patented Mar. 2,1915.

Jig!

THE NORRIS PETERS CO., PHOTO-LITE!!!" WASHINGmN, D (II.

WIT p A'I Fro I FRANCIS A. DEVEBEAUX, or MINNEAPOLIS, MINNESOTA, ASSIGNOR oFoNE-HALF 'ro rernrcr. DEVEREAUX, OF'MINNEAPOLIS', MINNESOTA.

SLIP-TRIMMING ATTACHMENT FOR FAIR-STITCHING MACHINES.

. Specification of Letters Patent.

Patented-Mar. 2, 1915.

Application filed April 20, 1914. Serial No. 833,080.

of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide a labor saving attachment for fair stitching machines, and provides an automatically operated trimmingknife, whereby the slip will be trimmed simultaneously with the op- GriLtlOll of stitching the slip and the shoe so e.

Generally stated, the invention consists of the novel devices and combinations of de vices hereinafter described and defined in the claims.

Hitherto, the application of slips to shoe soles, has involved the following operations, to-wit: The shoe soles, which, by a previous operation have been formed with the proper channel, have first had the slips secured thereto by cement, then and second,

the slips have been trimmed, either by hand or by a suitable machine, and next or third, the slips have been stitched to the soles. Usually, also the fair stitching machine has been provided with a groover in the nature of a tool for cutting the groove for the McKay stitch, simultaneously with the stitching operation.

In accordance with my invention, a trimming knife or attachment is applied to the fair stitching machine, and this trimming knife is preferably attached to the vibratory arm which has hitherto been employed to carry the groove cutting tool, and which is preferably also, still employed to carry the said groove cutter. With this trimming attachment, the operation of cementing or gluing the slip to the shoe sole is entirely eliminated. The said slip is simply properly applied to the shoe sole and the slip and sole are presented to the fair stitching machine, and in the operation of stitching the two together, the trimming knife or attachment will automatically trim the slip to the contour of the sole.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings: Figure 1 is a fragmentary view partly in elevation and partly in vertical section, showing the improved trimming knife or attachment applied as above indicated; and Fig. 2 is a horizontal section taken on the line m m on Fig. 1, some parts being broken away.

The character a indicates the shoe sole and the character I) the slip.

In the drawings I have illustrated my invention applied to what is known to the trade as the Puritan fair stitching machine, the construction of which is well known, and the parts of which may therefore, be briefly noted as follows: The numerals 1 and 2 indicate, respectively, the head and bed or work table of the stitching machine. The numeral 8 indicates the awl bar and the numeral 4 the awl punch which is carried thereby. The numeral 5 indicates the presser foot and the numeral 6 the presser foot bar. The numeral 7 indicates the vibratory arm which is carried by a rock shaft 7 that is given an oscillatory movement by the well known means, and at its free end is provided with a clamping head 8 to which is adjustably secured a groover or groove cutting tool 9. The arts so far described are found in the fair stitching machine above noted.

In the application of my trimming knife 10, the oscillatory arm 7 is provided with a laterally offset vertical tool socket 11 into which the butt end of the knife 10 is telescoped andwithin which it is adjustably but rigidly held by set screws 12, or other suitable devices.

The needle and cooperating needle actuating mechanism of the machine is not illustrated, but would be of the usual construction and arrangement wherein the needle would be arranged to pass through the puncture made by the awl 4. The trimming knife 10, asshown, is arranged to work through a slot 5* formed in the presser foot 5, and it is offset from the needle and awl just the right distance to follow the edge of the sole a, and hence, to trim the slip to correspond thereto. The sole and slip would be fed from the right toward the left, in respect to Fig. 1, and hence, the front or right hand edge of the trimming knife 10 is the sharp edge thereof. Under vibratory movements of the arm 7, the trimming knife will, of course, be given an oscillatory forward and rearward movement, and will cut the slip under its forward movement. Obviously, the groover 9 operates simultaneously with the trimming knife, so that in this improved machine, three actions take place simultaneously, to-Wit: the sole and slip are stitched together, the groove is cut in the sole, and the slip is trimmed to the contour of the sole.

The broad idea of my invention consists in the provision of a trimming attachment. By the addition of this trimming attachment, the amount of labor required to stitch the slip to the sole and to trim the slip, is very greatly lessened and the cost correspondingly reduced. The very fact that the cementing or gluing of the slip to the sole is dispensed with, is, in itself, an important feature, but the most important feature is found in the fact that the slip is trimmed without loss of time or labor, in the very act of stitching the slip to the sole.

What I claim is:

1. A fair stitching machine having in combination stitch-forming mechanism, a groove cuttin tool and a slip trimming knife arrange to cut a groove in the sole and to trim the slip to the sole simultaneously with the operation of said stitch-forming mechanism in stitching the slip to the i sole.

2. A fair stitching machine having in oscillatory arm provided With a groove cutting tool, a slip trimming knife also applied to said vibratory arm and arranged to auto- (Dopiea of this patent may be obtained. for five cents each, by addressing the Commissioner or Eatente,

' Washington, I. G.

Images