US1418752A - Shuttle mechanism - Google Patents

Description

F. E. VALOIS.

' SHUTTLE MECHANISM.

APPLiCATION FILED AUG. 1. 1918.

I 1,418,752. PatentdJune 6,1922.

2 SHEETS-SHEET I.

INvENrUK:

I T v FELIX EMILE VALOIS, 0F I-IAVERI-IILL, MASSr'iCl-IUSETTS, ASSIGNOR TO HAMEL MACHINERY COMPANY, OF LYNN, MASSACHUSETTS, A CORPORATION OF MASSA- crrusnrms.

SHUTTLE MECHANISM.

To all whom it may concern:

Be it known that I, FELIX EMiLn VALois, a citizen of the United States, residing at Haverhill, county of Essex, State of Massachusetts, have invented a certain new and useful Improvement in Shuttle Mechanism, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention has for its object an improvement in sewing machines for use in the manufacture of boots and shoes and particularly a machine known as an outsole or rapid stitcher, such a machine being provided with two threads one of which is su plied from a bobbin located in a shuttle. n machines of this character considerable difficulty has heretofore been experienced in sewing around the shank of so-called deep shank shoes, that is, shoes in which the sole of the shoe at the heel is much higher than the sole of the shoe at the toe. The so-called Louis Shoe is an illustration of a deep shank shoe. In the manufacture of such shoes it has been found very difficult to sew the shank and particularly sew the shank rapidly and neatly because when the shank is reached the shoe has to be tilted into a position in which the ball of the shoe strikes the shuttle case preventing further movement of the shoe to bring the edge of the sole at the shank into proper position with relation to the stitch forming and work feeding instrumentalities. Furthern'iore, when operating 011 this portion of shoes of this character the operator finds difliculty owing to the fact that the shuttle case cuts off his view of the shoe at a point where the stitch forming instrumentalities are operating on the edge of the sole.

I obviate the difficulties mentioned by placing the shuttle with its front face on an angle oblique to the line of feed of the shoe and by providing suitable mechanism for operating the shuttle in this oblique position. When the shuttle is placed in this manner the shoe may be passed through the stitch forming instrumentalities always maintain ing the edge of the sole at the stitching point in proper relation to the stitch forming instrumentalities without striking the shuttle case. The view of the operator is not obstructedand it results that the operator may work much more rapidly when sewing Specification of Letters Patent. Patented Jung 1922 Application filed August 1, 191a.

Serial No. 247,751.

around the shank of the shoe and may produce more perfect work at greater speed.

Furthermore, perfect work may be pro duced because the sole will not be marred by striking the shuttle case. In the following description I have referred only to the shuttle and mechanism for operating it and to the essential elements of the stitch forming mechanism, The other parts of the sewing machine do not have to do with-my present invention and, therefore, have not been de scribed. in detail.

The invention will be fully ul'lderstood from the following description when taken in connection with the accompanying drawings and the novel features thereof will be pointed out and clearly defined in the claims at the close of this specification.

In the drawings, Fig. 1 is a front eleva ing my invention.

Fig. 2 is a top plan View of the parts shown in Fig. l.

Referring now to the drawings, at A is shown the outline of a shoe of the deep shank variety said shoe being in one posi tion which it occupies during the stitching operation. At 11 is shown the frame of the machine. The needle which is of the ordi nary curved barbed variety is shown at 1.2: the looper' at 18, the table at 14 and the awl at 15 The machine is provided with the other usual stitch forming instrumentalities but it is not necessary to refer to them in detail. The i'nachine is of the awl feed type the work being fed by the awl 15 in the direction of the arrow in F 2. At 5 is shown the front feed or front thread delivery shuttle carried in a shuttle case 16 and driven by a shuttle driver of usual form mounted on a shuttle shaft 17. whichis placed at the rear face of the shuttle and is disposed at an angle to the line of feed and to the axis about which the needle oscillates. The front face of the shuttle. that is, the face indicated by the line designated 18 in Fig. 2 is set at an oblique angle to the line of feed of the work as indicated by the arrow in Fig. 2 and in a plane substantially coincident with the stitching point. This angle is about 35 but may be made more or less according to the character of the work which the machine is intended to do. I find, howtion of a part of a sewing machine embody ever, that the angle indicated is a satisfactory one for most classes of work. This angle should not be too large, however, or a shuttle having the thread drawn from the front cannot beusedsatisfactorily, Should too large an angle be used with such ashuttle it must be so positioned, in order to clear the needle, that the thread leaves the bobbin considerably to one side of the needle plane and contactswitli the moving shuttle or with the machine partson its passage to the work. As the shuttle moves, such action would remove the wax from the thread gumming upthe moving parts and interfering; materially with their proper operation andalsomodifying the tension of the bobbin thread, thus interfering with proper stitching. l i

In order to avoid this defect in the stitching, a shuttle having the thread drawn from the back or needle side mightbe used; but these shuttles have 'the great disadvantage of rendering: the bobbin very inaccessible for thread replenishment or otherwise, and in awe); thread machine where'these parts are heated this is a very serious drawback. Ply

arranging theshuttle as described;. I. am able.

to use a front feed shuttle, retaining the ready accessibility of the bobbin possible with this type and avoiding the necessity oftippingthe shoe while sewing'around the shank-but atjthe same time retaining the bobbin thread clear of the shuttle and other parts. This can be donesatisfactorily 'up to angles not much excecdihgA-LS degrees; and with shuttles asordinanly constructeda somewhat less angle is usually necessary or at least more satisfactory. tle shaft 17 is a gear 19 meshingwitha gear 2-0 on the driving shaft 21. which itself driven by a bevel gear 22 meshing with a bevel gear 23 on the main shaiftQt of the machine. The gears 19 and 20 may be of any suitable form to transmit the motion from the shaft 21 to the shaft 17, said shafts being set at an angle one. to the other. In practice I make the gear 19 a bevel gear and the near 20 a spiral bevel gear. The ratioof the near 20 to the gear l9lis threeto two and that of the gear 2?) to the gear 22 is twoto oneso that the ratio 1 of the shaft 24 to that of the shuttle shaft 17 isone to three. a. r a

From Fig. 1 it will be seen that when the stitch forming instrumentslities are working alonp; the. heel and shank of the shoeathe ballof the shoe is nearly on' a level withthe centre of theshuttleL FIOHT Fig.

- 2 it will be'seen that the shuttle being placed iniatsubstantial'ly ve'rticalplane at an angle as shown, the. shoe doesnot strike the shuttle' case an'd'the face of the welt at the point where the stitching istaking p'lacemay lie fiat'onthe table. More perfectand stronger stitchingwith less manualelforb on the part,

of the operator is produced, particularly as the locks of the stitches are not displaced as is the case if the face of the welt does not lie fiaton the table. a

'The line of'vision ofthe operatorwhen sewing the shoe is dowiiwaid along an oblique line which is nearly vertical, ll hen the shuttle is in the position shown, this line of vision unol:)structed. This enables the operator to hold his head in a natural position and at thesame time watch the work perfectly.

What I claim is: l y l 1. In an out-sole stitcher, in= combination a work-support having a work-engaging sur face which issubstantially parallel to the general plane of. the shoe-sole at the stitching point, a ourvedhooked needle and needle carrier journaled to oscillate about an axis disposed in a p] ane substantially coincident with the plane of the shoe-sole atthestitching'point but-beyond theedgeof the elite "1 shoe sole remote from the operator, feeding mechanism; a. front-threaddelivery shuttle'w having; its front face arranged at an acute angleto tlIS' lIHG of feed and in a plane'sub stantiallycoincident with the stitching pointl a ndmeans at' the rear of theshuttle'fordriv ing' the latter; I l a 3. In an out-sole stitcher, in combination; a work-support having a'work-eng-aging sur face which is substantially parallel to the general. plane of theshoe-sole at the stitch ing point, a curved hooked needle andneedIe carrier journaled to oscillateabout an axis disposed in a planesubstantially coincident withthe plane of theshoe sole at thestitching point but. beyond theedge of the shoesole remote frorn the operator, feedingme'chanism, a front-threaddelivery shuttle having its front-face arranged at an acute a npgle to theline offeed; said shuttle being so set relative to thestitching pointthat the path of the ascendingsliuttle beak is substantially coincident with a-linepassingthrough" the stitehingEpoint: and: perpendicular to the plane ofithe work-support, whereby'the'loop drawn outby the shuttle willbe substantially normal to the work. t N

In an out-sole stitcher, recombination, a worlnsupport havinga worlnengagingsurface which is substantially "parallel to the general plane of the sh0e-s0le at the stitching point, a curved hooked needle and needleeerrier journalecl to oscillate about an axis disposed in a plane substantially coincident with the plane of the shoe-sole at the stitching point but beyond the edge of the shoesole remote from the operator, feeding I118Cl1- anism a front-thread-delivery shuttle having its front face arranged at an acute angle to the line of feed, and a shuttle driving shaft arranged at the rear face of the shuttle and inclined to the axis of oscillation of the needle.

In testimony whereof I Efiix my si -nature.

FELIX EMILE VAfxOIS.

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