US2584320A - Bobbin winder - Google Patents

Description

Feb. 5, 1952 Filed 0%- 6, 1947 J. ARMENTt BOBBIN WINDER 2 sx-IEETs-SHEET l ATTORNE J. ARMENTI BOBBIN WINDER Feb. 5, 1952 2 SHEETS-SHEET 2 Filed Oct. 6, 1947 I r i -ull'l-IlllllllumA I ll 3.9

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INVENToR JAI/vis' WM5/W7.

g f E E' ATTORNEY 7'0 MNR.

Patented Feb. 5, 1 952 UNITED gsm'riis z claims. (ci. 24.2--225 This invention relates to bobbin winders and more particularly to those used in conjunction with sewing machines of the factory type.

In factory use of sewing machines, it is common practice to locate the same on 'one long bench or table, and rather close to each other to conserve space. is often a foot or so away from the drive end of the next machine, and work, if at all bulky, encroaches from the needle end of one machine on the table to the head end of the next machine. Furthermore, in factories using sewing machines it is a prevailing practice to employ operators on a piece-work basis, and interference of the work of one operator with operation by another has to ce avoided. Each operator has to wind or ll her own bobbins as required, and it is usual to have a bobbin Winder at the head end of each machine. To avoid delays, an operator keeps the bobbin Winder threaded ready for use, and therefore resents having that thread disturbed by an adjacent operator, inadvertent though it may be, as by the Work of the adjacent operator catching and dislocating the bobbin thread. Also, since time consumed windingv a bobbin is lost time to the remunerative productive time for an operator, the Windingv of the bobbin is done at high speed. It therefore becomes essential to automatically stop the bobbin from Winding when it is full, since in only a matter of moments the ."1

bobbin otherwise becomes overloaded and convolutions of the thread will slide over the end ilanges of the bobbin and become snarled. Yet a bobbin should be wound as full as possible so as to reduce the number cf times a day that the I operator has to stop to wind it.

This invention seeks improved means for saving time of the operator in bobbin winding.

More specically, an object of the invention is to provide improved means for setting a bobbin winder in motion and to stop the winding when the bobbin is loaded.

Another object is to simplify and reduce operations required by. the operator for winding a bobbin to loaded condition.

A. further object of the invention is to lprovide a single` lever to function as the operator-controlled starting means and as the automaticV load-gauging means.

Yet another object of the invention is to pro- I Thus the needle end of one machine elevation;

Figure 2 is a side elevation of the bobbin Winder anism, as usual, located below the table.

. 2 i aiiord ready access to the bobbin Winder by the operator and protection against disturbance thereof between bobbin-Winding operations.`

Other objects and advantages of the invention will appear hereinafter to those skilled in the art to which it apertains both by direct reference thereto and by implication from the context as the description proceeds.

Referring to the accompanying drawings in which like numerals of reference indicate the same or similar parts throughout several views:

Figure l is a front elevation of the drive end of a sewing machine with my improved bobbin winder associated therewith and shown in front end looking from right to left of Fig. 1, and with part of the hinged guard broken away for showing parts otherwise behind the same;

Figure 3 is a fragmentary side elevation looking in the same direction as in Fig. 2 and showing the bobbin Winder in its idle position; and

Figures 4 and 5 are sectional views on lines 4 4 and 5-5 respectively of Fig. 2.

In the specic embodiment of the invention illustrated in said drawings, the reference nu- :neral I0 designates the usual bench or table top on which a sewing machine II is secured, said sewing machine having the usual driving pulley I2 and clutch release I3 and driving belt I4. vIt will be understood that the clutch release isy a common feature of present-'day sewing machines which enables the driving belt I4 and machine pulley I2 to operate when winding a bobbin without simultaneously driving the usual. sewing mechanisms. The belt is in turn driven by a motor (not shown) or other impelling mechrlhe frontreach of the driving belt is usually operated in a downward direction and will be so considered herein but without'imposing limitation in that respect.

The bobbin Winder provides a drive wheel l5 arranged in a vertical plane dened by the front and back reaches of the belt; that is to say, is in the plane of the belt and the'plane of the belt is perpendicular to the axis of the machine pulley i2. Said drive Wheel I5 of the bobbin Winder is in front of the front reach of the belt Aand in idle position is outA of contact vfrom said belt, but for operating .purposes is mounted to be swung toward and into engagement with the said belt.

The bobbin Winderlfurthermore provides a` housing I6 here shown a's sheet metal andhaving a base Il secured to the table and having an up-standing flange or side wall i3 toward the sewing machine and extending in a forwardrearward direction with respectl thereto or parallel to the aforesaid plane of the driving belt. Said belt passes between the sewing machine and said upstanding flange and the base extends in a direction away from both the ange and belt.

Above the base, near the front end of the same is provided anupwardlydirectedgrpclgergarm i9 the lower end of which has 'hinged Vmounting upon a fixed stud 20 projecting in a perpendicular direction from said ange or side wall I8 of the housing i6. The rocker arm therefore adapted to be swung in a forward-rearward direction. At an upper part of said rocker arm there is rotatably carried a FrotatableY sliaft ili, said shaft being parallel to the stud 20 and projecting at both ends thereof from thesides 'of said rocker arm. At thejside of the rocker arm toward the housing flange, said shaft projects through said flange andion the vopposite side :of the flange from therocker arm carries said drive wheel if which is fixed thereon so. that rotation ofthe drive wheel effects acorresponding rotation of saidshaft. Saidshaft'passes through an arcuate slot 22 in the flange, said slot having its -center of curvature atzthe .center of'stud 2li thereby permitting the desired swing or 'oscillation of the rocker arm Aand rotatable shaft. The amplitude of oscillation' for thero/ckerfarm and shaft is adequate to advance'the driving wheel in a rearward direction finto depressing engage ment with the front reach Vof -the Vdriving belt ,K and to retract said wheel in a forward direction from engagement withsaidV belt.. This retracted or forwardly swung 'locationof the rocker arm and driving wheel is freferred to herein as lthe idle position thereof.v Said shaft is suitably shouldered and retained from longitudinalmove- L the wheel is secured in place ,on the shaftby a set-screw 25.

Said protruding end of the shaft having boss 23 terminates with a diameter less ,than that of the boss and constitutes a bobbin-supporting mandrel of properdiameter to fit within the usual central hole of` the vbobbin to .be wound. In order that the mandrel may fr ictionally engage the bobbin, a longitudinal slitv vis'provided in that part of said shaft .whichwconstitutes the mandrel thereby enabling the resultant segments of the mandrel on opposite .sidesrof' the. slit. to be sprung resiliently Ytoward each otherl 'Suciently to permit Ya Vbobbirill,tobe slid onto the mandrel and be frictionally held thereby. Boss 23 accordingly not onlyfunctions to prevent longitudinal displacementof the shaft, but al'soacts, at its other end,V 'toflimitthe insertedpositionof the bobbin.

Alever and toggle mechanism is provided for swinging the rocker'arm, Asrshown, this mech-V *i anism provides a lever 28-whichswings-in the samegeneral direction as thel rockerv arm and is mounted upon and rotatable with a studshaft 29 located parallel to vthe mandreland to the hineinaof said..rocher arm. Sadfstud;shaitris rotatably carried in and crosswise of the rocker arm at a part thereof intermediate of the hinging of said arm and the first described or bobbin-carrying shaft. Said lever is at the same side of the rocker arm as the mandrel end of said bobbin-carrying shaft, and at the other side protrudes to support a toggle arm 30 fixed thereon and extending forwardly therefrom. The forward end of said toggle arm is pivotally connectedby stud screw 3l `orother means to the rear end of'a toggle link 32 the forward end of which is pivoted, as by stud screw 33 or other means to the housing flange. A lip or other stop 34 -is provided, as upon the forward under edge of the toggle arm 30 to engage the toggle linlr Iforlimiting upward swing of said toggle arm yand linx to .a position slightly beyond dead center, vCollectively, the toggle arm and link are herein referred to as a toggle, and the described position slightly beyonddead center of the arm and link as shown kin full lines in Fig; 2 is referred toas the straightened or holding position of the toggle, whereas the downwardly swung position as shown in Fig. 3 is referred to as the Vreleased or broken position of the toggle. By

swinging lever 23 rearward, the toggle is straightened to its holding position'and in assuming that positionv necessitates .a rearward Swing of the rocker arm 9'to transpire, thereby causing drive wheel i5 to engage the sewing machine belt.

Lever "8 is located with respect to the bobbin and has angular disposition with respect to the toggle 'such that it can be swung partly into the bobbin as shown in Fig. 2 when swinging the toggle toholding position. An upper end of said lever extendsv above the bobbin at that position of' the lever and constitutes a nnger hold by which the operatormay manipulate the lever without having to touch ther bobbin. The distance of swing away 'from' the bobbin as indicated by dotted lines in Fig.V 2 to bring the toggle past dead center from holding position thereof, is set to correspond precisely tothe diametric size of the bobbin end flanges. Holding position of the toggle is rna'intainedinv the position of the lever within its segment of oscillation for all chordal positions of the lever up to its tangential lposition with respect to the bobbin periphery. V As the thread loads the bobbin, it engages the under side of the lever and therefore when the load of thread attains the diameter of the bobbin endflanges the lever is then at its tangential position withV respect to the bobbin periphery and has swung therequired amount to pass the toggle beyondits'dead center position in breaking direction. A spring l2li', shown as located upon the rocker arm stud 2d and under suitable actuating tension against the rocker arm, snaps the arm forward to release the driving wheel from contact withthe machine belt and thus stops further rotation of ithe bobbin. A bumper or stop is yshown carried by a bracket 36 on Vthe housing angeflocated inthe oscillatory path of forward movement of the driving wheel, and thus the Ywheel is bothlimited in forward swing to idle position'and is lbralred by said bumperso that rotation ceases forthwith. At the rear end of the housing it, fixed on base Il' thereof is a standard socket 3 1 for reception and support of'a standard 3S which in turn carries a spool rack'39,'spools of thread 40 and" threadV guide 4I;

Likewise at the rear end of the housing I6 and-carried'byf the 'side'flange vI'8 thereof; is a thread tensioning means 42 comprising discs 43,

43 on a common stud and of which the outery one is pressed toward the other by spring 44 adjustably as to tension exerted on the threadA y Said flange also is:` shown provided with a rack 45 for extra bobbinstf passing between the discs.

In order to protect the bobbin winding mech'V anism and the thread thereto and the spare bobbins from disturbance by work in an adjacent machine, or other interfering factors, al

guard 46 in the nature of a swinging door is provided but hinged as at 41 at its lower edge to swing from an upright protecting position to a downward or open position with the guard then substantially fiat on the table. This enables an operator to readily open the guard to movement, means for operating said toggle, and a housing carrying said mechanism, said mandrel, shaft support, toggle and toggle operating means being withinV and protected by said housing.

2. A bobbin-Winding mechanism comprising a rotatable wheel, shaft and mandrel rotatable as a unit, said mandrel adapted to mount a bobbin thereon to be wound, a support for said shaft, K' said support being hinged for oscillatory movement, a toggle attached to and having a position for releasably holding said support at one end of its oscillatory movement, and a lever for 1. A bobbin-winding mechanism comprising a rotatable wheel, shaft and mandrel rotatable as a unit, said mandrel adapted to mount a bobbin thereon to be wound, a support for said shaft, said support being hinged for oscillatory movement, a toggle attached to and for releasably holding said support at one end of its oscillatory operating said toggle, and a housing carrying said mechanism, said mandrel, shaft support, toggle and toggle operating means being within and protected by said housing, and said shaft projecting through one side of the housing and having said rotatable wheel on the projecting end of said shaft outside the housing.

JAMES ARMENTI.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 809,911 Eames et al Jan. 9, 1906 991,816 Ashman May 9, 1911 1,130,347 Taplitsky Mar. 2, 1915 1,302,936 Lefkowitz May 6, 1919 1,387,005 Hochman Aug. 9, 1921 1,475,597 Ringe Nov. 27, 1923

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