US1074758A - Shuttle. - Google Patents

Description

F. E. VALOIS. SHUTTLE.

APPLIoATloN MLED Nov. s2, 1912,

Patented 0ct.7,1913,

kUni'rlin srA'rEs ,rArEnr Enron.

rELIxjEMILE vA-LOIS, oE-HAVEEHILL, MASSACHUSETTS, ASSIGNOR To HAMEL SHOE MACHINERY-COMPANY,., OE LYNN, MASSACHUSETTS, A CORPORATION OE MASSA- GHUSETTS.

SHUTTLE.

I Patenteaoct. 7,1913.

Application filed November 22,- 1912. -Serial N o. 732,989.

To' all 'whom t may concern itrknown that I,FELIX EMILE VALoIs, a Cit/men of the United Sitatesfresiding1 at Haverhill, county of Essex,

State of Massgwhnsetts,- have invented -a certainnew and usefullmprovement in Shuttles, of which thej .following is a specification, reference being. had therein to the- .accompanying drawings.'

@The present invention relates to look stitch sewing machines and more4 particularly to that ty'pe of lock, stitch sewing machlnes used inthe manufacture of boots and-,shoes andknown asan outsole stitcher.

l,sin Fig. l to cause the loop of needle thread tobe passed about the shuttle and the bob-V The invention relates more particularly jto the shuttleandfbohbn mechanism of the machine, and` has for its. object to provide a. vsimple and lmproved means for retaining vthe. bohbininthe bobbini-case of the shuttle,

to provide an improved .tension device for the shuttle-thread, and further, to insure the.drawing out.v of the lshuttle-thread to supplyslack thread for the next succeeding stitch after the vSetting ofthe stitch last formed, 'all of which, objectsv are attained bythe simple construction illustrated in the accompanying drawing, and which Will now vbe described.

The. invention therefore consists of the devices vand'combinations of devices which will .be .hereinafter `described and claimed.

The present invention is illustrated inthe accompanying `vdrawing, which shows in Figure l a front elevation of a shuttle and its bobbin and showing my improvement, connected therewith, the viewA illustrating in sectional view. a portion of the stitched work, and the condition of the thread during the operation of the take-up in setting the stitch andbefore the 'shuttle returns to its starting position preparatory to again engaging the loop of needle thread. Fig. Q shows aivertical sectional view taken on the line2-2 in Fig. l. Fig.`3 Shows a front elevation of the mechanism with the shuttle in engagement' with the loop of needle thread and on its Way-to the position Shown bin and?- to become interlocked With the shuttle thread. Fig. 4. shows a perspective vieW the improved bobbinretaining `tension-applying and thread pulling guide removed. Fig. 5 shows a diagrammatic view illustrating the pull-oft function .of the 5, all of these guide. F ig.: 6 shows a vertical sectional view ythrough the shuttle with the Lobbin andretaining plate removed.

In the drawings, l indicates the shuttle provlded with the threadengaging hook 2, and the. bobbin chamber 3, having the central postor spindle 4 to receive thebobbin parts except in so far as may set forth being of the usual construction found in lock be hereinafter and ordinary l stitch sewing machines of the type hereinbefore referred to.

.It Will be understood by those skilled in this art, thatv the shuttle is mounted in a circular race, it havinga peripheral rib 6 arrangedto engage a guiding groove in the circular race, and that by suitable mechanisni the shuttle l is caused to reciprocate back and forth 5about a central axial line forthe purpose of causing the hook 2 to engage the loop of needle thread as it is drawn back bythe needle and to carry said loop of needle thread 'over and about the bobbin, the travel of the shuttlein 1one direction being about 'to the point shown in Fig. l at which point theloop of needle threadmay be drawn Vout o f the hook 2 by the take-up 'mechanism of the machine and which by' a further pull draws the loop of lneedle thread, and the shuttle thread with 'which it is engaged, into the Work, as shown in Fig. l.l Vhen the shuttle hasreached the point shoivn in Fig. l, its movement is reversed and it returns to its starting"posi tion which is approximately' the position shown in Fig. l, with the hook elevated and in position so that when it starts to move tovvard the loop of needle thread the hook Will engage said loop as shoivnlin Fig. 3. T hus, as before statedythe shuttle has what might be called acircular reciprocating in otion, and is generally referred to as a cir'- cularly moving shuttle. f

The bobbin 5 has a central aperture 7 arranged to be fitted upon the Stud or spindle' 4, and in order to retain the bobbin Within the hobbin chamber 3, I' have provided a retaining plate 8 having at one end an elongated recess 9 arranged to engage an undercut projection or head l0 `formed at theouter endof the post et. The retaining plate 8 at its opposite end 4is bent at right'angles, as shown at 1l, and is, provided with a spring latch arranged to be inserted in a recess 1 2 formed in the shuttle l, the spring the over-running o end 21 to 4 in Fig. /A

entrance of the aperture small. circles latch being 'constructed to frictionally engage the walls of the recess, and thus hold the locking plate 8 with itsslot 9 engaged beneath the head 10 of the post 4. This detachable retaining plate 534 eifectually holds the bobbin 5 in its chamber, but permits the free turning of the bobbin about the post 4.. The spring latch may be of any suitable construction, but as shown in Figs. 2 and f1 of the drawing, wai'dly curved spring arms 13, securely fastened tothe part 11 ofthe plate 8. These spring arms are normally spaced apart a greater distance than the diameter of the 12 and when forced through the aperture 12will be `slightly compressed.

At its rear. end the aperture 12 is enlarged as shown at 14, in Fig. 2 forming a shoulderA 15 so that when the arms 13 reach the enlarged portion 14 of the aperture 12, they7 will spring outwardly and engage the shoulder 15, thus firmly securing the plate 8 in its locking position.

The thread t leads from the bobbin through 'an aperture 16 which connects with the opening 12, and as shown in Figs. 2 and 4 the thread t passes out through the openings,16 and 12 over the part 11 of the plate 8 and is led through a hole 17 formed in the part 11 near its upper end, and thence the thread passes 'beneath theplate 8 and out through the thread guide 18 formed in the up-turnedend 19 of the plate 8. On its way to the thread guide 18 the thread passes under a suitable tension device w tain extent resists the withdrawal of the thread from the bobbin 'and thus prevents lf the bobbin, as the thread is drawn therefrom. This tension device comprises a spring 20 fastened at its rear the under side of the plate 8 and having at its opposite end an oii'set 22 arranged to clamp the thread against the under face of the plate 8. Thus the spring 20 produces a continuous and invariable tension on the thread. V

For the purpose of insuring'that a certain aniountof shuttle thread shall be d rawn off for the next stitch,'1 have as will be noted, offset the thread guide 18 from the axis about which the shuttle 1 is oscillated, and this is clearly shown by the diagram `5.. ,The .axis of oscillation of the shuttle is represented at a, and the thread guide 18 moves about this axis with the shuttle, the range of movement about the axis illustrated by the full and dotted line shown at 1' and'r in Fig. 5, so of the sewing machine when the parts are in the position shown in Fig. 1, draws vdownward upon .tlie thread t. thus drawing the loop t2 intofjf the work in the manner shown in the com leted lock shown in Fig. 1, thus drawing a that the take-up it comprises the outhich to a oerl lthe slack of the' shuttle thread into the work. When the 'shuttle starts backward in the direction shown by the arrow in Fig. 1 to resume its starting position it carries the thread lguide from its lowermost vposition shown by the dotted lines r in Fig. 5 to its highest position shown b the full lines r in Fig. 5, .and as the threa t is taut between the thread guide 18 andthe work, as the shuttle starts its return'niovenient this movement ofthe guide necessarily results in thefthread being drawn from the bobbin, thus providing slack thread for the next stitch.

It'will bev noted that the end 19 which carries the thread guide 18 is raised or elevated from the shuttle, as shown `clearly in Fig. 2, thus causing the thread t as it leads vfrom the guide. 18 to he effectively held away vfrom all the moving parts of the bobbin and shuttle, and this lI regard as an additional important feature of my invention.

It is thought that the operati n of the device will be -fully understood by those skilled inthe art from the foregoing description and that a further description of its opera."i tion is unnecessary.

What Iclaim is;

1. A circularlyl moving shuttle, having a bobbin chamber therein one side of which is open, a central po-st for the bobbin, and a retaining plate located on the open side of the bobbin chamber, said retaining plate being detachably secured to the post Vat one end and detachably secured to the shuttle at the other end. i

2; A circularly movingshuttle havingaI bobbin chamber therein, a central post for the bobbin, a retaining plate engaging t 'e post at one end land the shuttle at the other end, and a tension spring on the said plate.

3. A circularly;` moving shuttle having in one face an open'lbobbin chamber, a post for the bobbin vprojecting centrally from the base of the bobbin chamber, a detachable rtaining plate located on the -open side of the bobbin-chamber, said retaining plate having at one end a slot for engagingthe head of the post and at its opposite end a- ,compressible latch for having Y in gaging a recess in the shuttle and athread 125, bobbin guide carried by said retaining plate. 5. A circularlymovable shuttle, a chamber in one face thfereof, a ost pro ectiIig-centrally from the .base o the-,bo bin chamber, a detachable latch t)late having lat one end means for engaging "the post and at surface of the bobbin or` and 'atits' its opposite end spring members and a recess in theshuttle outside of the bobbin chamber for receiving t-he spring members of the latch plate.

(LA circularly'movable shuttle, a bobbin chamber in oneI face thereof, a post projecting centrally from the base of the bobbin cham-ber, a detachable latch plate having at one end means for engaging the post andatits opposite end means for engaging a. recess in the shuttle, a tension spring secured to the said plate for engaging the bobbin thread and a thread guide.

7. In combination a circularly movable shuttle, a bobbin chamber therein, a post4 in said bobbin chamber for receiving the bobbin,.a detachable latch plat-e having means at one end for engaging the post anda detachable connection with the shuttle at its opposite end, a tension Spring carried by the at one end for engaging the post, and a dey tachable connection with the shuttle at its; opposite end and a thread guide carried by `said latcl plate adjacent -the post engagin a thread guide carriedlby said latch chamber therein, a post in end and elevated above the outer face ofsa l plate. v

In testimony whereof I affix my signature, in presence of two witnesses.

FELIX EMILE VALOIS. Witnesses:

'CHARLES A. HAMEL, VJorn: J. SULLIVAN.

i l Copies of this patent may be obtained for five cents each, by addressing the Commissioner o! Patents,

' Washington, D. C."

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