USRE11951E - williams - Google Patents

Description

Reissued Nov. 26, [901. s. WILLIAMS, Decd.

' UNITED SHOE MACHINERY COMPANY,-Assignee.

TAKE-UP FOR SEWING MACHINES.

(Application and Feb. 9, 1901. v

1n: mm; pan: ca, WAsMlNGraN, n. c;

No. 95|. I Reissued Nov. .26, mm.

' s. WILLIAMS, Decd.

UNITED SHOE MACHINERY COMPANY, Assignee.

TAKE-UP FOR SEWING MACHINES.

(Application filed ,ieb. a, 1901.

4 Sheets-Sheet 2.

-60 Quan/ I THE NORRIS PETERS cu., WASHINGTON, n.

110. 11,951. Reissud Nov. 26, 1901;

s. WILLIAMS, Decd. UNITED SHOE MACHINERY COMPANY Assjgnae. TAKE-UP FOR SEWING MACHINES.

(Application filed Feb. 9, 1901.)

4 Sheets-Sheot 3.

v Beissued Nov'. 26, l90l.

"Nu. u,95|.

' S. WILLIAMS, Decd.

UNITED sum: MACHINERY COMPANY, Assignee. TAKE-UP FOR SEWING MACHINES.

(Application filed Feb. 9, 1901.) 4 Sheats$heet 4.

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THE NORRIS FETERS co wasamcfou, n, c.

UNITED STATES PATENT OFFICE.

UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEWV JERSEY,- V

ASSIGNEE OF SAMUEL WILLIAMS, DECEASED.

TAKE-UP FOR SEWING-MACHINES.

SPECIFICATION forming part of Reissued Letters Patent No. 1 1,951, dated November 26, 1901. Original No. 634,785, dated October 10, 1899. Application for reissue filed February 9, 1901. Serial No. 46,672;

To all whom it may concern:

Be it known that SAMUEL WILLIAMS, formerly of New Orleans, in the parish of Orleans and State of Louisiana, now deceased, invented certain new and useful Improvements in Wax-Thread Sewing-Machines; and it is hereby declared that the following is 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 improvements in take up devices for wax-thread sewlug-machines, and especially to that class of machines known as inseaming machines. The object of the said invention is to render certain machines of this class now in use such, for example, as the well-known Goodyear welt-sewing machine and othersoapable of sewing as flat an inseam as may be done by hand and at the same time preserving the superior qualities of the chain-stitch. These 7 objects are attained by the employment of a elevation.

yielding mechanism in some portion of the take-up or thread-controllin g mechanism acting upon the thread afterit has left the tension-wheel graduated approximately to the breaking strain of the thread and by which as the thread is drawn near the completion of the stitch an ever-increasing strain is applied thereto until the maximum for which the device is adjusted is attained, thus avoiding any severe shock at the final pull and enabling a greater tension to be applied to the same size of thread than has hitherto been done. Likewise at the commencement of the returnstroke the maximum strainis reduced gradually, thus completely setting the stitch and preventing any slip or relaxation thereof.

In order that the said invention may be more clearly understood, the same will be described With reference to the accompanying drawings, in which-- Figure 1 represents in side elevation, with portions removed, a form of Goodyear weltmachine with the improved take-up mechanism applied thereto. Fig. 2 represents a detail plan view of the take-uplever seat. Fig. 3 represents the auxiliary take-up lever in Fig. 4 represents in front elevation the machine and attachments shown in Fig. 1 with parts removed. Fig. 5 represents in front elevation an enlarged detail view of the. bracket for supporting the take-up-lever sliding seat. Fig. 6' represents the same in side elevation, and Fig. 7 is a rear elevation of part of the machine.

As the various working parts'of the Goodyear welt-machine above referred to have been fully described in prior patents and as their operation is well known in the art, only those parts which operate directly with or are embodied in the present invention need be particularly herein referred to and ,described.

In the accompanying drawings similar parts are represented by similarletters throughout the several views.

In the form of the invention shown in the drawings the take-up lever E is mounted upon a stud eand between the two lugsF and F of a sliding seat F This sliding seat'F is provided also with a third'lug F located at one corner thereof and at right angles to the lugs F and F and the lug F? being provided with a stud orbufferf (See Figs. 1, 2,

and 4-.) ,1

In line with the buffer f is the screwthreaded buffer f which is screwed into lug F on the stationary bracket H, the said bracket also comprising the slide-box h for the take-up seat F Mounted on the buifer f is the ad justable stud or nut f between which and the lug F and coiled around the bulters f andf is the tension-springK,while at the rear end of the buffer is located the check-nutf. The adjustable stud f, with bufferj intact, limits the play of the sliding seat F". A washer f may be inserted on the buffer f, or a plurality of such washers may be so inserted, as may be desired, for varying.

the compressibility of the spring K.

The edge on the right side of the seat F is beveled and (its into recess h, while the edge on the left side of said seat is similarly bev-' eled to the bottom surface, so as to have a sliding fit between edges h. and 71,2. prevents any tendency of said take-up-lever seat to lift during its operation. It will be noticed that this cap 71 extends only about one-third of the length of sliding seat F; but this is done for compactness and is suflicient.

A cap 77,3

as the'alinement of the various parts forming f and screwthe stud f backward against F, whereby the compression on spring K is entirely relieved, said spring being made just long enough to go in place withoutresistance when the. butters come apart to their fullest extent. Then remove cap h Fig. 5, disconnect the connecting-rod from take-up arm 0, and the take-up-lever seat can be readily lifted out of the slide-box and the compression-spring replaced by any other of suitable length and core.

The part 72. ot' the bracket H is steadied or braced by the continuation of the upright portion k A hollow space is formed in the bracket, as at h and the extension of the bracket'is given a curved sweepto allow the shaping in metal to be done easier.-

Iu'adapting this invention to the Goodyear welt-sewing machine it"will be seen that several of the parts thereof are slightly altered. Thus instead of the ordinary bracket which supports the takenp camlever the bracket II is employed. There are also employed a new looper-lever "L, looper-lcver swivel L',

welt-guide-throw cam-lever M, the hubs ot the back-gage lock-cam lever N and needle cam-lever, take-up lever E,take-up cam-lever B, auxiliary take-up lever E, and studs for the same which are altered where necessary.

The auxiliary'take-up and take-up levers'are provided with the thread-rollers e and e, respectively.

A desirable form of tension device for use in connection with the improved takeup is shown in Fig. -1. The tension-wheel D and brake-lever P of this device are mounted in a bracket 0, secured to the head of machine, as at 0. The tension-wheel D is mounted upon a'stnd (1, carried by the rearwardly-extending portion 0 of the bracket 0. The

brake-lever is pivotally mounted upon a stud p, which is carried by the frames 0 and O, and embraces hubs p and p in its construction. A sleeve or washer d is mounted next to the tension-wheel and on the stud d. This stud projects out beyond the washer d',where it is provided with the thumb-nuts d and (1 between which and the said washer is inserted the coil-spring 01, carried upon the projectwasher d is the drum D, upon which the brake-band Q acts. The brake-band Q, preferably of leather, forms the lining of thesteel band Q, which is secured at its upper end in a clamp g, which latter is pivoted, as at q, to

the brake-lever P, while the other end of the steel. band'Q is secured, as at (1 to the lower end of the rod Q A lug 1 having a central aperture, is secured by the nut g to the lower part of the cam-lever in front of the connection g aperture of the lug g having the portion extending up beyond the lug screw-threaded. The nuts g are placed on the rod next to the upper side of the lug g while the extreme upper end ofithe'rod carries the nuts (1 and inserted between the'uuts g and nuts is the coil-spring By this arrangement the tension of the brake may be adjusted. Secured to the upper end of the bracket 0 is the brake-lever stop R, against whose eccentric periphery the tension-lever is held by the spring r, secured to the tension-lever, as at r, and to the stud 7- The brake-lever is operated by a cam-block S, dovetailed into the peripheryofthe thread-finger cam S. thread T passes from the tension-wheel D to the thread-roller e and thence to the rollers e and elof the auxiliary take-up and take-up and then to the looper,by which it ispresented to the needle G.

J representsthe insole being operated upon Asshown in Figs. 1 and 4, the parts arerep The rod Q passes up through the The out, and thus holding the longend of they take-up lever from continuing its upward movement, the backward motion of the ca1n-' lever B in the direction of the arrow causes the lug F to advance toward the'lug F 'compressing the spring K until the bufliers f and f meetthat is to say, when the take-up cam-lever begins its travel in the direction of thearrow it does not impart a positive upward movement to theputer end of the takeup lever, but instead thereof causes the bu tier f to advance toward the butter f all the while compressing the spring K, the connec-' tion between the-'take-up cam-lever and the" take-up leveracting as a kind of toggle-joint,

thus exertinga yielding'stress on the thread until the butters meet, when a positive upward movement of the take-up lever. will'then take place.- Thereis thus an'almost total pause in the drawing of the thread, the re-v quired strain being fully distributed throughout the thread before drawn off the tensionwheel, which according to the present arrangement is capable of carrying a greater pressure than with devices heretofore constructed. The tension brake-lever P is so adjusted as to clamp the tension-wheel just before the stitch is to be set and to release it before the thread is pulled off, and the cam-stop R is so secured to the bracket (9 that the approach of the lever P to the cam S maybe varied. At the moment that the brake is to be applied to the tensionwheel the cam-block S engages the upper end of the brake-lever, forcing it back. This independently of the needle.

causes the lower end of the brake-lever carry- (1 the tension of which may be varied by the adjusting-nuts q.

In regard to the adjustment of tension it will be noticed that by the present invention springs of different degrees of compressibitity may be interchanged or the compressibility varied by the insertion or removal of washers. The tension of the spring may also be varied by the adj Listing-nut). This feature, which admits of the tension of the take-up and tension devices being so readily adjusted, is a most advantageous one, inasmuch as by it the machine may be used with any size of thread from that required for the smallest baby-shoe to that required for the heaviest work and all the while utilizing the full strength of the thread. Besides the superiority of the work thus produced. there will be a reduction in the time lost which would otherwise be occasioned by the breaking of the thread. 1

While the present invention is herein shown and described as applied to a Goodyear weltsewing machine, the said invention is nevertheless applicable to all sewing machines using take-u p mechanism to tighten the stitch An auxiliary take up is usually employed in machines of this character to take up the slack thread as the take-up returns in the forming of a new stitch, and incidentally and to some slight degree it lessens the shock to the thread when a new supplyis pulled from the tension-wheel in completing the stitch; but the two functions are difierent and require'difr'erent conditions. An auxiliary take-up requires aconsiderable throw and a spring with suflicient flexibility to exercise its usefulness throughout that space, whereas the function of gradually applying strain tothe thread requires but a short space foroperation with a spring of rapidly-increasing resistance.

The present invention is not limited to the described details of mechanism here shown relative to a yielding mechanism embodying I the principles herein set forth, as these principles can be made operative by other suitable mechanism and in any portion of the take-up or threadoontrolling mechanism without departing from the spirit of the invention.

Having thus described the invention, whatis claimed, and desired to be secured by Letters Patent of the United States, is

1. In a sewing-machine, the combination with a stitchiorming mechanism comprising a needle and tension device, of a take-up le verand means for actuating the same, a yielding support to which said lever is pivoted, said yielding support, during the operation of the take-up exertinga yielding stress upon the thread between the tension device and the needle and being so adjusted that its full stress upon the thread is approximately equal to the maximum strength of the thread, the said support operating independently of the needle and exerting its greatest stress just prior to the drawing off of fresh-thread for the formation ofa new stitch, substantially as described.

2. In a sewing-machine, the combination with a take-up cam-lever, of two members connected together, one of said members being movable relative to the other, a take-up lever mounted upon said movable member and operatively connected with the take-up cam-lever, a spring interposed between the said members, an adj nsting-nut for varying the tension of said spring, and means forinterchanging said spring, substantially as described.

In a sewing-machine, the combination with a take-up cam-lever, of means for operating said lever, a stationary member, a yielding movable member supported by and connected with said stationary member, a take up lever pivotally mounted on said movable member and operatively connected with said take-up cam-lever, a spring interposed between said stationary and movable members and means for adjusting the tension of said spring, substantially as described.

a, A sewing-machine, comprisingatake-up mechanism including a take-up cam-lever and a take'up lover, a sliding seat upon which said take-up lever is mounted,a stationary bracket carrying said sliding seat, a resilient body interposed between said sliding seat and the stationary bracket, substantially as described.

5. A sewing-machine, comprising a take-up in ech anism including a take-up cam-lever anda take-up lever, a sliding seat upon which said take-up lever is mounted,a stationary bracket carrying said sliding seat, a resilient bodyinterposed between the said sliding seat and the stationary bracket, and means for ad justing the tension of the said resilient body, substantially as described.

6. A sewing-machine, comprising a take-up adjusting the tension between said butters,

substantially as described.

7. A chain-stitch shoe-sewin g machine,havin g, in combination, a hook-needle, a looper, means for intermittently locking the thread and a yielding stitch-setting take-up graduated approximately to the breaking strain of the thread acting to set the stitch while the thread is locked, substantially as described.

8. A chain-stitch shoe-sewing machine,having, in combination, a hook-needle, a looper,

izo

Y means for intebinittently locking the thread, i and a cam actuated yieldingiy-snpported take-up graduated approximately to the breaking strain of the thread acting to set :the stitch while the thread is locked, substantiaily as described.

9. Achain-stitchshoe-sewingmnchine,having, in combination, a, hook-needle, a looper means for intermittently locking the thread, a take-up, a, cam to actuate the take-up,and

a spring graduated appi oximately t0 thebreaking strain of the thread acting on the take-up to resist the strain thereon 0f the pull of the thiead, substantially as described.

In testimony whereof the UNITED SHOE MA- I 5 CHINERY COMPANY has caused its name to be subscribed hereto by its president hereunto duly authorized.

UNITED SHOE MACHINERY COMPANY,

By SIDNEY W. WINSLOW,

Pzresident;

Witnesses: I

LoUIs H. BAKER, JAMES B. GEDDE's.

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