US1225220A - Sewing-machine. - Google Patents

Description

Patented May 8, 1917.

MIIIIIIIII III IIIII C. l. CADY.

SEWING MACHINE. APPLICATION FILED AuG.27. 1915.v

narran sraras ritratta ernten CARSON J'. CADY, OF ROCHESTER, NEW YORK, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SEWING-MACHINE.

Specification of Letters Patent.

Application led August 27', 19715. Serial No. 47,621.

.Be it known that I, @Anson J. Canv, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Sewingl'lachincs; 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 use the same.

The present invention relates to wax thread shoe sewing machines, and more particularly to mechanism employed in connection with such machines for grooving the sole of a boot or shoe.

In the type of machine in which the present invention is embodied the presser foot is maintained in engagement with the work during the formation of a stitch and is entirely removed from engagement with the work during the feeding movement.

An object of the present invention is to provide a grooving knife which is supported upon the presser foot and is permanently maintained in operative relation to the sole independently of the position of the presser foot. With this object in view a feature of the invention consists in the combination with a presser foot and actuating mechanism of a grooving knife supported upon the presser foot and movable relative thereto, and means for maintaining the grooving knife in engagement with the work when the presser foot is elevated. Still further features of .the invention consist in certain novel features of construction, combinations and arrangements of parts hereinafter described and claimed, the advantages of which will be obvious to those skilled in the art from the following description.

In the accompanying drawings illustrating the preferred form of the invention; Figure 1 represents a side elevation of a sewing machine embodying the invention; Fig. 2 is a detail illustrating a sectional elevation of the grooving knife in the position which it occupies when the presser-foot is elevated; and Fig. 3 is a view similar to Fig. 2 illustrating the position of the grooving knife when the presser-foot is depressed into contact with the work.

The machine shown in the illustrated embodiment of the 4invention is substantially the same as that disclosed in the application of Ashworth, Serial No. 769,566, liled May 24, 1913. This machine comprises a work support 1, and a coperating presser-foot 2 which is mounted upon one end of a presser-foot lever 4L fulcrumed at 5. The presser-foot is actuated during the operation of the machine to iirst engage yieldingly with the work, is then positively moved a predetermined distance to clamp the work during the formation of a stitch, and is then elevated and retained in this position during the feeding movement of the work, after which the cycle of operations-is repeated. In order to accomplish this movement of the presser-foot, the lower end of the presserfoot lever is connected through a link 7 with an actuating lever S pivoted between its ends to a controlling bar 9 which is locked at predetermined intervals in a head 10 through a locking device indicated generally at 11. rI`he lower end of the actuating lever S is connected through a link 12 with a tension spring 13 which normally tends to swing the presser-foot lever in a direction to move the presser-foot into engagement with the work. The upper end of the actuating lever 8 is connected to the usual operating lever 15 through a link 16 to cause the operation of the actuating lever from a rotary cam disk 17. At the completion of the feeding movement of the work, the controlling bar 9 is free to move and the spring 13 accordingly swings the actuating lever 3 about the connection with the link 16 to move the presser-foot into yielding engagement with the work. rIhe controlling bar is then locked in position and the cam disk 17 operates through the lever 15 to swing the actuating lever about the connection with the bar 9 to move the presser-foot a predetermined distance and positively clamp the work. The lock 11 is controlled in the usual manner through a curved lever 2OY fulcrumed at 21 and connected to the locking lever through a link 23. The lever 20 is normally maintained in position to lock the bar through a spring 25 connected with the opposite end of the lever 20, and is unlocked through an arm 2G operatively connected with a rotary cam. The foregoing construction is subtantially the same as that shown and described in the application above referred to, and in consequence has been only briefly described herein.

With this type of machine it is desirable Patented May 8, 1917.

toprovide mechanism for forming a groove in the surface of the outsole, and in the simplest and most efficient form of the invention which has yet been devised the grooving tool is supported in the presser-foot and is movable relative thereto. The grooving tool is provided with means for normally moving it toward the surface of the work as the presser-foot .is elevated and with means for lin'iiting this movement .in the direction of the work. To this end, as shown clearly in Figs. 2 and 3, the presser-foot is provided with a recess 3() in which a grooving tool 3l is slidingly supported. The upper end of the grooving tool is provided. with an enlarged cylindrical shank 33 and a smaller rectangular portion Silterminating in the end of the tool. The shoulder thus formed by the two portions 253 and 34 is arranged to engage with a cooperating shoulder 35 formed in the recess 3() to limit the movement of the tool toward the work when the presser-foot elevated. ln order to prevent a` turning movement of the grooving tool in the presser-foot, the lower portion of the recess 30 is rectangular in shape, corresponding with the shape of the portion 34. rl`he grooving tool is normally depressed by a spring 37 which is interposed between the upper end of the grooving tool and a stud 38 threadedly mounted in the upper end of the recess and having a depending stem 40 to guide the spring 37. ln this type of machine the feeding of the work occurs only when the presser foot is lifted and the grooving tool is retained by the spring 37 in the position shown in Fig. 2 of the drawings. When the presser foot engages with the work the grooving tool is held in the recess against the action of the spring 37 in the position shown in Fig; 3, and no feed of the work occurs to cause the formation of a groove by the tool. This mechanism provides a simple and compact construction for forming a continuous groove of uniform depth in the surface of the outsole, while Copies of this patent may be obtained for permitting the presser-foot to be entirely removed from engagement with the work during` the feeding movement. i

Vhile it is preferred to employ the specic construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed or modified without departing from the broader features of the invention.

The invention having been described, what is claimed is:

l. A sewing machine comprising a presserfoot, actuating mechanism for the presserfoot to cause the presser-foot to clamp the work during the formation of a stitch and to entirely remove the presser-foot from engagement with the work during the feeding movement, a grooving knife supported by the presser-foot and movable relative thereto, and means for maintaining the groovingv knife in engagement with the work when the presser-foot is elevated.

2. A sewing machine comprising a presserfoot, actuating mechanism for moving the presser-foot toward and from the work, a

grooving knife supported by the presserfoot, a spring for moving the groovingknife toward the work when the presser-foot is removed from the work, and means for limiting the movement of the grooving knife toward the work.

3. A sewing machine comprising a presserfoot having a recess provided with a shoulder portion, actuating mechanism @for moving the presser-foot toward and from the work, a grooving tool slidingly supported in the recess and having a shoulder cooperating with the shoulder portion of the recess to limit the outward movement of the tool in the recess, and a spring for normally maintaining the grooving tool in contact with the shoulder portion of the recess.

CARSON J. CADY.

ve cents each, 'by addressing the Commissioner of latents. Washington, D. G.

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