US2449835A - Sewing machine bobbin winder - Google Patents

Description

Sept. 21, 1948.

C. 5. BEST SEWING macnnm BOBBiN WINDER Dimmin latented Sept. 2 1, 1 948 2,449,835- SEWING cnmn BOB-BIN wmnna T Clarence S.T Best,= TBelvidere, =,Ill., assignor toTT ,National Sewing Machine Company, Belvidere,

111., a corporation of Illinois Application June 18, 1945, Serial No. 600,128 I This invention relates to sewing machines, and particularly to improvements in bobbin winders for sewing machines. T T i The main object of the invention is to provide a bobbin winderwhichis eflicient for its intended purpose and dependable in operation; which functions to wind thread upon a spool in regular and uniform rows, in which the turns given the thread are regular and uniform, and which avoids piling up'of thread at the ends of the spool. T i

In the winding mechanism embodying my invention, the thread distributor is moved back and forth in a single plane parallel with the axis of the spool, instead of in an arcuate path as is common in the art. By this construction, the thread distributor presents the thread to the spool in a uniform manner throughout the length of the spool, maintaining identical relationships and tension throughout the extent of the travel of the distributor opposite'thespool. These advantages are not attainable when the distributor is moved back and forth in anarcuate path and the threadis not presented to the spool in a single plane parallel with the axis of the spool.

Another object of myinvention is to provide positively synchronized driving means for rotating the spoolland reciprocating the thread distributor, whereby the uniformity of theturns and rows of thread placed on the spool will be maintained. 1 I a Other objects and advantages will appear from the following specification.

In the drawings:

Fig, 1 is an elevational view of a sewingmachine provided by a bobbin winder embodying my invention.

Fig. 2 is an elevational view or part of one end of the .machine, on an enlarged scale, showing part of the uprightstandard and fly wheelj and showing in end elevation my im'provedbobbin windermounted on the face of the standard.

Fig. 3 is a'longitudinal, vertical sectional view, partly in elevation, of the bobbin winder.

Fig. 4 is a transverse, vertical sectional view taken in the plane of the line 4-4 of 3. Fig. 5 is a perspective View of a detail of construction.

Fig. 6 is a sectional view of .a detail of construction taken in the plane of the line 6-6 of Fig. 4, looking in the direction indicated by the arrows.

Conventional parts of a sewing machine head to which my invention may be applied include the bed plate It), upright standard ll, overhanging 3 Claims. (01. 242

arm l2, sewing head I3, fly wheel l4 and spool carrying spindlel5. T T i In the preferred embodiment of my invention shown in the drawings, the bobbin winder oomprises .a specially formed bracket having a base It, andarmsTIT and I8 rising from the baselli at opposite ends thereof. .The arm llrhas anTupper portion l9 horizontally bored-to serve as-a journal for the shaft 2|] of the pulley 2|, the pulley being adapted for contacting the-fly wheel 14 when the bobbin winder is in operation. The bracket is mounted onthe upright standard ll for limited pivotal movement by means of the arm 22 which projects rearwardly :from the armT ll iof the bracket and is pivotallyconnected tot-the engagement with the wheel [4, the operatormerebutton into the position shownin 1y depresses the Fig.2; T T T ..T T T The inner end of the pulley shaft 20 has fixed to it apiniontllxandthe headstock 3| forrotating the spool" 32. T The pinion meshes with agear 33 fixed onTthe distributor shaft 34,:the latterbeingTrotatably mountedinT-bearings 35 and 36 in the bracket members. 11 and I 8, respectively. Op-' positethe'head stock 3|, in the upper portion of the bracket arm I8, is a tailstock?! forengagingT one end of the spool32. Thetailjstock 31flis springpressed byTa coiled spring 38 located'in a recess in the bracket arm" Ill, between the tailstock 31 and the side wall of the bracket arm,

said spring being wrappedaround the pin 39- on which the tail stock ismounted. 40 indicates means for withdrawing the tailstock 31 in'order to position the'spool 32. T a i i 1 The thread distributorarmM has ahook 42 on itsupper end andan inturned right'angle end 43 on its lower end. The-distributorarm! is connected by a screw 44 to a block 45 provided with a circular bore for receiving the distributor shaft 34, and with a recess extending at right angles to the bore for receiving a rockable key 46, shown in perspective in Fig. 5, and in the sectional view, Fig. 4.

The rockable member 46 comprises a cylindrical body having a reduced end which terminates in a key 4! provided with a curved face G8 adapted to engage the circumferential surfaces 49 produced on the shaft 34 by cutting two spiral guideways thereon as best shown in Figs. 3 and 6. The spiral guidevways are connected with each other at opposite ends of the shaft 34.

The operationofthe bobbin winder is as-follows: the spool 32 intended to receive the thread 50 is positioned as shown in Fig. 3, between the rotatable head stock 3| and the spring pressed ing the arm to move iongitudinally of the shaft when the shaft is rotated, and means on the distributor shaft operatively connected with the shaft which rotates the spool holding means for rotating the distributor shaft in timed relation to the rotation of the spool hoiding means.

2. In a sewing machine provided with an upright standardland a notatablefiy wheel, bobbin windermechanism comprising a bracket pivotally mounted on said standard, spool holder m'eans rotatably mountedin said bracket, means tail stock 37. When the pulley 2-l hasbeen-moved into contact with the fly Wheel M (which may be motor powered or treadle'op'erat'ed'), the puil l'ey 2| through its pinion 30 will drive the gear 33 on the distributor shaft 34 and rotate said shaft."

The pulley 2| will also rotate :thephead stock 3:1

and spool 32. The rotation of the distributor shaft 34, due to the engagement of the' k'ey-"fi'l of the rocker 46 in the guideway 49 of said shaft 34, :wi1lwauseithe distributor 'arm Ail 'to :move longitudinally of said shaft 34,first" inone'directioniand' then in the opposite direction, while :the

rotating 613001532 will :draw ithe'zthr'eadlfi lltthrough v order -zto'travel in the-spiral guideway inithe opposite direction.

r Tha -fact ethatfthe spdol 32' iandiiih'edistributor shafttdd are positivelydriven lay-gearing actuated fromfithe :same pulley :sharfit results dependable synchronization aof the winding 'mechlanii'sm, whereby the thread is smoothly and even lyplace'd in uniform-hows, without astraiin on the thread."

eGhanges inlay" be :made: in deit'ai l's of construction andtiforin of =1parts Without departing from the .=soop.e :lcof invention as set {forth an :the

appended claims. i 1

. alt-1n 1a :sewingmachine sprovi ded iwithzan up? right standard and a rotatable fly wheel, aboibhin -winder i comprising :a ari-gid ibra'cket .'.having a reamwazrdly extending iarm pivotally. connected to said", sizandlardsin :jruxtapnsifion'ito said fly 'wvhee'l; aaliinkupivotally connected at tone fend to'zsaid bracket, a m amia lily :aofruated'member-moamted forjlimittedi-movement in a fixedapartzdfzthestandand, :saiid imlanuazlly actuated; imam-her lbeing ipivotallly econnedteditowthe opposite end of :the link, spool holding means rotatablytmounted .inthe bradkehashaft mounted. .in the-bracket .in axial alignment; withs-thespdolaholding'means and con.- neeted;;-;thereb0 for "rotating. said means, a pulley onsaiid shafhmaniipulation :of said manu'ai ly ac tmkhedrmenrber serving to :move said; pulley-into. :Qlllt of engagement with said'ny-wheer, a,

distributor shaft mounted in thebuacketipara'llel.

with; :thenspooi; holding means, ia-th-read distributon-arm, mounted on :the distributor shaft, co.- operatingmeansaon the arm and shaft, for caus- Contact with the'fly wheel for rotating said spool ho lder means, .a distributor shaft parallel with t'he spool holder "means rotatably mounted in the braoket, at'hread distributor arm mounted on. the distributorshlaft, cooperating means on the arm and shaft for causing the arm to move longitudinally of the shaft when the shaft is rotated, means on theidistributor shaft operatively :connected with zthe. spool vhol'der irotaiiing means forirotating the distributor 'shaftei ntiiim'ed relation to the rotation of thesspool'zhelder means, and manually I operable means mounted" onithe standard and I nivotallyaconne'ctedvto the bracket for moving the bracket 'andithereby moving. the spoolzhoider rotating mean-s in to'tan-d out of' contact with thefly wheel. i

'3. Irma sewing'ma-chine provided with an-upright standard and a:rotatableiiyi wheelyabobbin winder comprising a bracket pivotally mounted on the face ofwsaid standard slightly below'the axis of -the-fiywvhee1, spool: holding means Y rro'tatlabl-y amounted in said bracketpaapnlley rotatably meuntedfi-on the 'braclretyandnactuated by direct contact-with the fly wheeL'said pulley b'eing loperatively.connectedwith the spoolvholdinggmeans for rotatingzsaid cm ea-nsya distributor shaft' ro'tatabl-y mounted "in the bracket panall'el with'the REFERENCES CIT-En The following :refereneeaare-of record i-n-the file ofthis patent: Y A

UNITED STATES zeArnrnts T I :Datel'Anderso'n "Feb. 20,

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