US1448568A - Shoe machine - Google Patents

Description

. LMSES Mmm 13, i923.

H. MUSKIN sHE MACHINE Filed Dec. 5, 1920 Patented Mar. i3, i923.

@Ffillia HYMAN MUSKIN, OIF BALTIMORE, MARYLAND.

Sironi/resume.

Application filed December 3, 1920. Serial No. 427,959.

To all whom it may concern.'

Be it known that I-IYMAN MUSKIN, a citi- Zen of the United States of America, residing at Baltimore, State of Maryland, has invented new and useful Improvements in Shoe Machines, of which the following is a specification.

' The object of the invention is to provide means in connection with shoe sewing or stitching machines whereby the stitches may be formed perpendicular or substantially perpendicular to the plane of the shoe sole and extended through the sole to the under or outer or wearing surface thereof under such conditions as to provide for the embedding and protection of the stitches or stitch elements at the outer or wearing surface against the effect of wear incident to the use of the shoe, and involving in that connection the formation in the out-er or wearing surface of the shoe sole of a groove in which the stitches may be laid and protectively embedded; and in this connection to provide means whereby the preparation of the outer sole member for the reception 'of the stitching, and consisting for example in the surface grooving thereof, may be effected progressively as the sole is stitched in the formation of the shoe.

Moreover it is the object to provide a grooving means for operation upon the exterior or wearing surface of the outer shoe sole member, in the preparation thereof for the embedding reception of the stitch members atthe outer or wea-ring surface of the sole, which will act to temporarily displace a sufficient portion of the material of the face of the shoe sole to allow for the reception and embedding of the stitches, and to hold the displaced portions thereof in a distended relation during the laying of the stitches, to permit of the subsequent resumption by such portions of their former or original positions t0 constitute a covering and protection for the stitches and pre-vent the wear incident to the use of the shoe from being applied to the stitches.

1With these and related objects in view as will appear in the course of the following description, the invention consists in a construction, combination and relation of parts of which a preferred embodiment is disclosed in the accompanying drawing, it being understood that changes in form, proportion and details: may be resorte-d to within the scope of the appended claims without depart-ing from the principles involved.

In the drawing:-

Figure 1 is a plan view partly broken away of a shoe sewing machine, throat plate and feeder with which is associated a grooving means constructed in accordance with the invention.

Figure 2 is a longitudinal sectional view of the same on the plane indicated by the line 2 2 of Figure 1.

Figure 3 is an inverted plan view of the throat plate.

Figure 4 is a perspective view of the same.

Figures 5 and 6 are detail views respectively of the grooving carrier and bit, detached.

rIhe device embodying the invent-ion is illustrated in connection with the feeder mechanism of a machine of that type wherein the needle hole, indicated at 10, is formed in one of the elements of the feeder of which the jaws 11 and 12, serrated as in the ordinary practice operate in slots 13 in the throat plate 14, and wherein the advance or work feeding movement of the feeder, in the direction shown by the arrow in Figure 1 occurs while the stitching needle is in its depressed position and is in engagement with the work.`

In cooperative relation with the feeder and in the illustrated embodiment of the invention actuated by the feeder is a shoe sole grooving means consisting essentially of a carrier 15 mounted for reciprocatory movement in timed relation with the feeder, and a bit 16 supported by the carrier and preferably formed as an independent element attachable thereto by means of a 1base plate 17 or the equivalent thereof held in place by retaining screws 18 or the equivalent thereof, to the end that the bit may be replaced or interchanged with others of graduated sizes, may be suitably tempered, and may be detached for the purpose of sharpening the same and the like, said carrier being disposed in the path of the return movement of the feeder for repression thereby during its return stroke, after having advanced the work for the reception ofthe succeeding stitch, van actuating spring 19 serving to maintain the` indicated relation between the carrier andthe feeder and hence acting to advance the carrier during the forj ward movement of the feeder.

The bit which is constructed to operate in a path parallel with the surface of the throat plate and projects above the plane thereof a distance corresponding with the ydepth of the j proposed groove to be formed in the Linder surface of the shoe sole, is disposed for cutting action during the return movement of the feeder, and hence insuch relation to the othei'parts of the lmechanism as to form the groove in the shoe sole in advance of the formation of the stitches, but at sucha short distance in advance of the intersecting path of movement of the needle as to serve as a means `of holding the side walls of the groove formed bythe bit in a laterally displaced vor'distended relation `during the stitchforming operation of the needle, to insure the laying of the stitches in the groove, so that as the work further proceeds, and the side walls or displaced portions oi the shoe sole are relieved of the distending action of the bit, said displaced walls iii rcturning to their normal positions cover and conceal the stitches laid in the outer surface of the sole and interpose an appreciable thickness of the shoe sole material between the stitches and the wearing surface to protect they stitches from wear.

- The bit, it will be noted, is of cross sec-y tionally triangular forni, thus providing diverging sides terminating` at the cutting edge, the line of divergence being in the direction vof movement ofthe bit. Further, the upper end of the bit is beveled rearwardly to 'leave a sharp point making for the easy initial penetration of the bit into the goods at the beginning of the channeling operation,

the diverging side walls of the bit maintaining the distention of the slot oi' groove at the time of the laying of the stitches.

In the construction illustrated the carrier is mounted in `asuitable guide formed by a longitudinal channel 20 in the surface of the throat plate, spanned by a bridgev piece 2l, and a downturned ear 22 at the eX- tremity of the carrier supports a stud 23 with which one end of the spring 19 is engaged. Theother end of the spring is fitted in a socket 24 in which is disposed a.

ingthe relation between the bit `and the carrier the lbase plate 17 of theI former is `pref-I erably'provided at'the extremity adjacent to Mentes the bitfwith a depending ear 26 for engagement with a seat 27 in the adjacent" end of the carrier.

The invention having been described', what is claimed as new and useful is z j .91. A shoe sole stitching mechanism having,y in combinationwith` the bed plate,

throat plate and feeder, av work channeling means `having a reciprocable bit carriermounted for sliding movement in a path parallel with the bed plate for forward and rearward move-ment with the feeder, a bit arranged closeV to and in the longitudinal plane of the needle for cut-ting action during the return movement of the feeder, the bit i having a shank bearing upon the'upper-'sur-` face of the .carrier and provided with a bearing-v ear for engaging thev ,front end thereof, and the carrier having'-a'fdependingl ear for pressure by a bit actuating spring.

2. A shoe sole stitching mechanism having in combination with the bed plate,th'roatl plate and feeder, a work channeling means having a reciprocable bit-carrier mounted for sliding movement in a path parallel with the bed plate 'for vforward and rearward movement' with-the feeder, a bit arranged" close to and in the longitudinal plane of they needle forcutting action during thel return movement of the feeder,'the carrier and bit plate having depending ears of which that on the bit plate bears against the end of the carrier, and a spring bearing upon theear of the carrier for maintaining the carrier in following rela-tion with rthe feeder,` and means for adjustingthe `tensiongof the` `spring' to compensate forthe rapidity of` movement of the feeder.l

The combination Vwith a be'dplate, the throat "pla-te' and the feed dog of a sewing` ico machine; of a work-channelingv member o comprising a supporting plate slidably mounted beneath the throat plate land having a top channel, and a shank secured insaid channel andv having lan upstanding blade at its forward end, the throat'plate having abottomslot in which the supporting plate seats, a retaining plate forsaid supportiiigf'plate extending across' ythe bottom thereof,`the throatv plate also fhaving an.;v opening through-which the bla-de protrudes,` j and the'forward end ofthe shank being'be'- 1 hind the feed dog to abutthereagainstto obtain a working stroke on the return stroke l' of the feed dog, a spring bearin'gagainst the rear end of the aforesaid supporting member, a sockety for 'the spring mounted on the' bottom of the -bed plate, from which socket one end of the spring projects toengage ythe supporting member, and an adjustable abutment in the socket engaging the other end of the spring. y*

ln testimony whereof' heaiiiiies his signature. Y

HYMANk MUSKIN.

iio"

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