US1160604A - Sewing-machine bobbin-winder. - Google Patents

Description

M. HEMLEB.

SEWlNG MACHINE BOBBIN WINDER.

APPLICATION HLED AuG.21. 1913.

1,160,604. Patented Nov. 16, 1915.

WITNESSES: INVENTOR J 51 i m I I 777% ATTORNEY CuLuMmA PLANOGRAPH c0-. WASHINGTON D c UNITED TATE PANT FlQE, f

MARTIN I-IEML EB, OF ELIZABETH," NEW JERSEY, ASSIGNOR TO THE SINGER MANUFAC- TURINGCOIVIPANY, A CORPORATION OF NEW JERSEY.

SEWING-MACHINE BOBBIN-WINDER.

Specification of Letters Patent.

Application'filed August 21, 1913. Serial No. 785,844.

To all whom/it may concern Be it known that I, MARTIN HnMLnB, a citizen of the United States, reslding at Elizabeth, in the county of Union and btate of New Jersey, have invented certain new and useful Improvements in Sewing-Machine Bobbin-Winders, of which the following is a specification, reference being had therein to the accompanying drawings. My invention relates to bobbin-winding devices for sewing machines, and more particularly to devices of this character adapted to be driven through direct contact with the balance-wheel of a sewing machine, the object of the invention being to improve the construction subject of patent to Me- Farlane. No. 961,151! of June 14;, 1910, while retaining the substantial elements thereof.

Inthe present construction, the bobbinspindle and driving-wheel of the bobbinwinding attachment are carried by a swinging arm mounted by means of a fulcrum stud upon a belt guard overhanging the grooved hub of the balance-wheel, a runway being formed upon the hub to transmit mo tion to the bobbin-driving wheel. Upon said fulcrum stud, and intermediate the swinging arm and the belt guard, is mounted a lever which carries a spring-pressed latch hook. The swinging spindle-carrying arm is spring-pressed upwardly from the runway and is held in its operative position against the stressof said spring by the latch hookthe latter automatically releasing said arm at the end of the bobbin-winding operation, thus permitting the arm to carry the driving-wheel out of contact with the runway. While the latch holds the arm and its driving-wheel in operative position, the arm and the latch carrying lever are locked together, and the" thrust of a spring inter posed between the lever and the belt-guard is transmitted to said arm, wherebythe nonresilient rim of the driving-wheelie springpressed against the face of the runway.

The McFarlane construction, "subject of the patent above referred to, employs the elements just described, with the exception that a rubber rini'is used for the "driving wheel and driving contact between the latter and the runway depends entirelyfupon the resiliency of said rubber rimthe latch carrying lever being maintained in fixed position except during adjustment. 'In attachments of the type illustrated bythe McFarlane patent above referred to, the use of the resilient rim upon the bobbin-driving wheel renders the efi'ectiveness of the attachment dependent upon the continued resiliency and form of the rim. The rim must be highly resilient, must retain its form, and must offer resistance to wear. The only practical material which possesses the above character- I istics' is rubber, but rubber is objectionable because it quickly becomes oxidized under certain atmospheric conditions, and it is affected by the oil used upon the attachment and upon the sewing machine. In the present invention the bobbin may be driven by j a wheel having a Wear-resistant, non-resilient rim, such as steel, indurated fiber, or compressed felt, inasmuch as sprang-pres sure is applied to the wheel, as hereinbefore pointed out.

In the McFarlane construction it'is impossible to provide the lever with a spring Patented Nov. 1e, was. I

to thrust the driving wheel into spring contact with the runway, because such spring would render the latch ineffective. The disengagement of the latch from thespindlecarrying arm wouldpermit the lever to spring downward while the arm would remain stationary, the wheel maintaining its contact with the-runway. And a stop device, employed to prevent downward move ment of the lever after release of the arm, would render the spring ineffective, the thrust of the latter being held by such stop device. In the latter case the driving-wheel after being brought into contact with the runway, would be held by the latch against, the'stress of the spring of the swinging arm; but, should the driving-wheel rim be formed of non-elastic resistant material, the contact would be inefiective to transmit the necessary motion. I s p In the present invention, the latch carry I ing lever is given a downward thrust by a spring as aforesaid, and a stop is provided for limiting the downward movement of the lever, whereby the spindle carrying arm, upon its release by the latch is'permitted to move upward to carry the'driving-wheel out of contact with the runway. "In throwing the attachment into operative position,

lever upwardly 7 against the stress of its spring and away from the stop, the spindles a lever finger-piece is depressed to move-the carrying arm being held in its inoperative position by a stop device. When the upward movement of 7 the lever carries the spring-latchinto position to, lockthearin and lever together,.pressure upon the finger,-

piece of the lever is discontinued and the lever is permitted to move the arm downwardly thereby carrying the driving-wheel into contact "with the runway against the face of which it is pressed by the lever spring. 7

In h ec empany e' d wi s, li r is a front, sideelevation of the b ohhin-wind; ing in operativerelation with a sewing machine balance wheel, the support ing shaft rand bearing therefor aiiorded by thesewing machine frame ,being in transverse section. [Fig. 2 side yieyv of the parts represented ,iiLIfi'g.v lshowing a por: tion of the balanc'e-wheel'and the belt-guard infsec'tion; Fig. 3 is ia s partial side elevation, of the part shows in Fig, l with the bobbin-winder in retracted position. A Figs 1s atransverse section of the belt-guard the swinging arm vwhich carries the dr vlng wheel, and th e latch carrying lever, "showing the relationof such 'pa rtsi and the tensionsprings therefor.

At the rear end of the sewingfinachiiie standard '1 is formeda bearing boss Zircontaininga bushingv 3. securedin said boss by set-screw & and 'afio'rd'ing ahea'ringffor the main-'shaftb upon, the rearwar end "of which is mounted balance-wheelfi. The balance wheel isproyided with the usualannularf'groove 7 tofreceive the driving belt, and

with a cylindrical portion ,8 adjacent "said groove to afford a runway for the driving wheeloif the bobbirtwi'nder. e

Overhanging the ba'lance-wheelfhub is a segmental belt-guard, 9 provid'ed with a seg formedot steel, indurated fiber,.or other as sistant material' The rearwardbearing boss 15 of: tllqswingiug 2111111 14 overhangs the belt'groove 'Z of the balance wheel (handthe driving wheel of the attachment is thus disposed suitably for securing its contact with the yrm iay 8 0f said balancewheel. The

pp s e bfl he p le 16 p oie b yond the corresponding bearing boss '15 to receive '2 the usual disk-bobbin 18 to; which the thread guided by meansofnotched vibrating arm 19 of arock-lever fulcrumed by means o f scre wi-stud 20 upon the lateralear ioftinextension 21 formed upon ing-arm 14;. The rock-lever is provided with a second arm 22, engaging actuating-cam 2-3 upon the worm-wheel 24 pivotallymounted by; means of astud25 upon said extension 21,

of swinging-arm lit and meshing with worm 26 -fixed upon the rotary-spindle l6.

mounte 'ija lioolied l'atch '32 having an angur larly a ranged 'hQ de3mv1ith a notch "34 in its opposite end, ada o ted to engage a pointed "or tooth '35. upon the. swinging'spindlecarrying arm 14:. The latch 32 is proa vided with an 'angularly arranged arm 32* normally disposed ladjlacent the bobbin 'receivinf'gfend of the spindle and adapted to be engaged by lthe thread for releasing the latch, when the hobbinwindingoperation is fl fi i nz we u wn m nn r- 1 1 cling stud aperture31 of the offset "portion 30 of the latch carrying lever is an annular c11aniber36ffor housing a coiled spring,the latter having one end securedin an aperture 37in said 'cham ber and its opposite end securedin apertur formed the bottom of Y a housing chamber "36* surrounding the fulcrum pin aperture ofthefl atch where i byth e latch isspr'iiig-pressed "toward the tooth ore lug 3 5 of the swinging spindle carryin'g a'rinl k y V v V The hub 13fof the 'arm 14 is formed with an annular chamber l3 fforhousing a coiled springpone end of the latter being secured in an aperture in the bottom of said'ch'amberjand the other enaextendin outwardly throughfa lateral opening therein for engagement with the offset portion 30 of the latch carryingllever,whereby the arm l lis spring-pressed upwardly toward its inoperativeposition 'uponlrjelease oflatch 32. p I

Encircling the aperture fo'rmed in the latchecarrying lever to receive s'jtu'd 12, is an ioo 40 one end of which is; secured in an apertiire' formed in leverfafiid the opposite entl is secured in an aperture in the bottom ofihe mu in cg ha ii 138*; o e it e, f l guard 9,,gi her y t el -c ry fi eYs 'f l spring-pressedftoforce spindle-carrying arm w ifidtli ir fiir yu i b 5 1 7 when the latchcarriefd'by said leyer is thrown i engag ment with the tooth "Or lug 35 {of stre m 1'4.

In 1, thefparts iba hey l s lms whe 'driv nsrw ion ing-wheel l7; firmly upon the runway 8 to 35 is released and spring-pressed arm l i is.

permitted tospring upwardly until the point of the lug is arrested by engagement with the outer face of the notch 3d of the latch,

the parts reaching the position shown in Fig,

3. In such position the'driving-wheel 17 is held out of engagement with annular; runway 8 of the balance-Wheel, and the downward movement of lever 27 under action of spring 40 is preventedby stop-lug 41 formed upon the flange of belt-guard 9. g

The parts being in inoperative position, it will be'seen by reference to Fig. 3 of the drawings that pressure upon the spindle carrying arm 14 at a point above the'spindle 16 will move the, arm downwardly against the stress of itsflspring until the driving wheel is brought into engagement'with the runway 8. During suchmovement of arm lei thelatch-carrying lever is held against movementby stop-lug l1, and it will be seen that/arubber rim upon the driving-Wheel might yield sufliciently to permit latch .32 to lock the driving-wheel in such operative position. In such case, however, the contact between the driving-wheel 17 with runway 8 would be secured solely by virtue of the rubber rim, the action of spring .40 being rendered ineffective by stop-lug tl. Toobviate the necessity of using aresilient driving-wheel rim and to transmit the pressure of spring 40 to driving-wheellZ, when the latter is in operative position, the present; construction comprises means for locking together the latch-carrying lever and the spindle-carrying arm while the latter is in its upper or inoperative position- It will be seen from inspection of Fig. 3 of the drawings, in which the driving-wheel is shown in inoperative position, that pressure upon the finger-piece 28' of theleVerI27 will cause the offset portion of said lever to rise, the spindle carrying arm 14 likewise rising until lug 42 at the rear of said. arm comes into contact with seat 4-3 ontheflange of the belt guard. .As the offset portion of lever 27 continues to rise above stop-lug 41, the notched face of latch 32 is carried beyond lug 35 of spindle-carrying arm 14 and, under the action of its spring, the latch is thrown over the upper face of said lug thus locking the arm and the lever together. When the lever finger-piece is released, the action of lever-spring 40 will carry the parts into the operative position shown in Fig. 1.

It will be observed that according to the present improvement the driving wheel for the bobbin-supporting spindle is sustained by the swinging arm supporting said spindle said balance-wheel.

yieldingly in operative relation with f the sewing machine balance-wheel which actuates the spindle through said driving wheel," or yieldingly in inoperative relation withwheel isthus a floating element when disposed in either its initial retracted position v or in itsoperative position inwhich latter its resilient mounting enables it to maintain its rolling contactor driving relation with the runway of the balance-wheel.

In my pending application Serial No.

857,291, filed Augustl8, 1914, the improve I mentis shown embodied in a device wherein the drivingwheel has a resilient connection withthesp ndle, both of these elements belng mounted upon the spring-retracted swinging arm. In either embodiment, how

ever, a. resilient connection is provided be tween the driving wheel and the stud upon wh ch the latch for the swinging arm is mounted, so that, notwithstanding the positive engagement of the latch with the arm carrying thedriving wheel, the latter maintains its yielding contact with the runway of the balancewheel, the face of the driving wheel in each embodiment being substantially inelastic in orderthat the effective ness of. the rolling contact shall not'be dependent uponthe elasticity of a substance which deteriorates with age or constant use, such as the rubber ring which has been customarily employed heretofore to provide resiliency in the operative connection between the driving wheel .of the bobbinwinder and the, sewing machine balance Wheel. 7

Having thus set forth the nature of the invention, what I claim herein is 1. rLbobbin-winder comprising a swinging arm, abobbin-supporting spindle sustained thereby, a-spring applied to said arm and adapted The spindle driving I to hold it yieldingly in an initial position, a driving wheel having a substantially inelastic face adapted to roll in contact withyan actuating element for imparting, rotary movements to said spindle, a latch adapted for engagement with said arm to'hold it displaced from said initial position, a fulcrum-stud for said latch, and a resilient connection between said stud and the driving wheel whereby the latter is sustained inyielding relation with said stud.

2. A bobbin-winder comprising a swinging arm sustaining a bobbin-supporting spindle and a driving wheel therefor, a swinging lever adjacent said arm, a detachable coupling for. connecting said arm and lever to move in unison, a spring applied to said arm for holdingit yieldingly in an ini tial position, and a spring applied to said lever and adapted to act upon said arm through said coupling oppositely to the firstnamed springand to overcome the stress of the same for holding said arm in operative necting said lever to the *arm whereby the position displaced from said initial position wherein it'is adapted to yield bodily.

3.=A bobbin-winder comprising a swinging arm, a spindle and a driving Wheel therefor carried by said arm, a spring for maintaining said arm in an initial position,

a la tchcarrying lever, a spring-pressed.

latch carried by said lever and adapted for engagement with said arm, and a spring ap plied to said lever and acting in opposition to and adapted to overcome the stress'of the first-named spring-- to yieldingly ,maintaiu said swinging armdisplacedfrom its initial position. f

"spring applied to said arm," means for 'conin and a balance wheel thereon provided with an annularrunway, of a'bobbin winder ,ccmprising a swingingarm, a spindle and a driving wheel therefor-carried by said arm, a springfor maintaining the arm in position'to hold said driving-wheel out ofcon tact with said runway, a lever spring pressed in opposition to said arm, means for transmitting the spring pressure of said lever to the arm whereby the'latter-is moved in opposition to its spring and the drivingwheel is spring-pressed against the runway,

and automatically' acting means for releas ingthepressure of saidlever from said arm at the completion of the bobbin-winding operation. i 6. The combination with a sewinginachine frame, a rotary shaft journaled therein s and. a :balance-wheei thereon provided with an annular runway, of a bobbin-' winder provided with a rotary spindle, a

I copies'of this natent'znay ;be obtained for five cents each; by addressingthe Commissioner of .Iatents, I

l. Abobbin-winder comprisinga swing "ingfar m, a spindle and a driving wheel therefor carriedby said arm, a spring for maintaining the arm in a given -"'position, a

lever spring-pressed in opposition to the the action of the boblast-tea friction-wheel mounted on said spindle,f a

swinging arn'i' carrying said spindle and frictlon-wheel, a spring for maintaining the arm normally in inoperative po'sitionto hold said i sition whereby the pressure :of said latch-* lever'spring will carry the driving wheel into spring contact with said runway, and automatically acting means for releasing said swin ing armat'the completion of a bobbin winding operation. 1

7; The combination with a sewing ma- 7 chine frame, a rotary shaft journaled therein and a balance-wheel thereon provided with an annularrunway, of a bobbin-winder supported by said frame and providedwith a rotary -sp'indle, a' friction-wheel mounted on said spindle, a spring-pressed swinging arm-adapted to support said spindle and friction-wheel andto'r maintain the latter" normally out of contact with; said runway,-

spring, the stopcto carry said; latch into engagement with the swinging arm whereby 'the pressure of said lever-spring is transmitted.

WashingtonQD. C, 7

means for limiting the movement of said arm under its spring, a latch-lever, andla latch adapted to engage said-swinging-arm, a spring for pressing said latch-lever in opposition to the swinging arm, a stop for 11111- iting themovementof said lever under its means formoving said lever from HEMLEB. f

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