US3281086A

US3281086A - Thread winder

Info

Publication number: US3281086A
Application number: US332448A
Authority: US
Inventors: William P Goodman; Jr William E Campbell; Terrill J Richardson
Original assignee: Maremont Corp
Current assignee: Maremont Corp
Priority date: 1963-12-23
Filing date: 1963-12-23
Publication date: 1966-10-25
Anticipated expiration: 1983-10-25
Also published as: GB1063740A; CH439038A

Description

Oct. 25, 1966 w. P. GOODMAN ETAL 3,281,086

THREAD WINDER Filed Dec. 23, 1965 5 Sheets-Sheet 1 ll I2 DIAMETER 54 INVENTORS wILLIAM R GOODMAN WILLIAM E. CAMPBELL,JR. TERRILLIJ- RICHARDSON I BY M, M I w LA ATTORNEYS Oct. 25, 1966 w. P. GOODMAN ETAL 3,281,086

THREAD WI NDER Filed Dec. 23, 1963 5 Sheets-Sheet 2 INVENTORS WILLIAM F. GOODMAN WILLIAM E. CAMPBELLJR TERRILL J. RICHARDSON BY M,M/n/9 M ATTORNEY 6 Oct. 25, 1966 w. P. GOODMAN ET THREAD WI NDER Filed Dec. 25, 1963 5 Sheets-Sheet 3 INVENTORS' WILLIAM P. GOODMAN WILLIAM E. CAMPBELL, JR. TERRILL J- RICHARDSON BY ,JW,%1H M ATTORNEYS United States Patent Ofifice 3,281,086 Patented Oct. 25, 1966 3,281,086 THREAD WINDER William P. Goodman, William E. Campbell, Jr., and Terrill J. Richardson, Richmond, Va., assignors, by mesne assignments, to Maremont Corporation, Chicago, Ill.,

a corporation of Illinois Filed Dec. 23, 1963, Ser. No. 332,448 6 Claims. (Cl. 242-18) This invention relates to machines for Winding thread, yarn Wire, and other strand material (hereafter generically referred to as thread) onto cops, cones, spools, tubes, and other packages, hereafter collectively referred to as bob-bins. More specifically, this invention relate-s to winding machines having a Winding spindle supporting a bobbin onto which thread is wound to form a thread package, a reciprocable guide for guiding the thread onto the bobbin, and a gainer mechanism for displacing successive wraps of thread to form a stable thread package.

The most modern and advanced winders of this type heretofore available are those disclosed and claimed in pending application No. 298,040 filed July 29, 1963, by Edward G. Mueller for Winder.

One important object of the present invention is the provision of novel improved winders of the same general type as, but having materially higher winding speeds than, those disclosed in the above copending application to thereby provide an increase in winding capability.

This and other objects of this invention are achieved by supporting the winding spindle for swinging or pivotal movement about an axis remote from and parallel to the spindle and so located that the package being wound rests against a rotatably supported roller or bail. This construction permits the thread guide to be assembled to the follower of the cam mechanism provided to reciprocate the guide making the heretofore employed pivotal thread guide supporting traverse arm unnecessary.

Several important advantages are gained by this arrangement in addition to reductions in manufacturing and maintenance costs achieved by the elimination of the traverse arm and allied components. By eliminating the traverse arm, the mass of the components rciprocated by the winding machine cam is materially reduced, permitting a surprising increase in winding speed from 500 rpm. (the maximum speed attainable by winders of the type disclosed in application No. 298,040 and by other prior art winders of the type to which this invention pertains) to 2,000 rpm.

In addition, as pointed out in copending application No. 138,166 filed September 14, 196-1, by August I. Hambach for Precision Winder, (now Patent No. 3,193,209) torque motors, which are the type employed in the winding machines of the present invention, react to externally applied forces to maintain the Winding tension constant. Elimination of the traverse arm and associated components also reduces extraneous external drag materially increasing the capability of the torque motor to maintain the winding tension uniform and at the desired value.

A further novel feature of the present invention is that the bail supporting the thread package exerts a continuous pressure on the package, and this pressure can be maintained substantially constant or decreased slightly as the diameter of the thread package increases by properly locating the Winding spindle pivot axis. Such constant or slightly decreasing pressure on the package results in the formation of a materially better and more stable package.

The innovation just described, like the elimination of traverse arm, is a significant advance over the winders disclosed in application No. 298,040, which make no provision for exerting pressure on the thread package, and those commercially available winders which do make provision for maintaining pressure on the package. The

mechanisms used in the latter employ complex spring biased systems which are so complicated as to be generally unacceptable for commercial applications.

From the foregoing, it will be apparent that another important object of this invention resides in the provision of novel improved thread winders of the type disclosed in the copending application, but which are capable of Winding better packages than the earlier dis-closed Winders.

In conjunction with the foregoing object, it is a further specific object of the present invention to provide winders having a novel and simplified mechanism for maintaining a fairly constant or slightly decreasing pressure on the thread package being wound as the diameter of the package increases.

It is another object of the present invention to provide novel improved winders of the type disclosed in the copendi-ng application, but which are capable of providing more accurate and uniform tension control.

A further object of this invention is the provision of novel improved winders having all the advantages of those disclosed in the copending application, but which are simpler and less expensive to construct.

Another specific object of the present invention is the provision of novel improved thread winding machines in which the pivotally mounted thread guide bearing traverse arms of the prior art winders are eliminated.

Other objects .and further novel features of the present invention, as exemplified in the novel winder construction discussed above, will become more fully apparent from the appended claims and as the ensuing detailed description and discussion proceeds in conjunction with the accompanying drawing in which:

FIGURE 1 is a partially diagrammatic side elevation of a thread winding machine constructed in accordance with the principles of the present invention;

FIGURE 2 is a front elevation of the thread winding machine illustrated in FIGURE 1, with the major portion of the winders gainer mechanism housing removed;

FIGURE 3 is a section through the winding spindle, its support, and the winding spindle drive, taken substantially along line 33 of FIGURE 1;

FIGURE 4 is a section through the thread guide and thread guide reciprocating mechanism, taken substantially along line 44 of FIGURE 2;

FIGURE 5 is a view of the thread guide and the thread guide reciprocating mechanism, looking generally in the direction of arrows 5-5 of FIGURE 4; and

FIGURE 6 is a diagram depicting certain parameters involved in determining the magnitude of the are through which the winding spindle is preferably designed to swing as the thread package is wound to insure the production of thread packages of optimum quality.

Referring now to FIGURES 1 and 2, thread winding machine 20, constructed in accordance with the principles of the present invention, includes a swingably mounted, rotatable winding spindle 22 on which a thread bobbin 24 (see FIGURE 3) is supported. Thread is guided onto bobbin 24 by a reciprocating thread guide assembly 26 (see FIGURES 4 and 5) to form a thread package indicated generally in FIGURE 1 by reference character 28. A rotatably supported, free wheeling bail 30 exerts a constant and substantially uniform or slightly decreasing pressure on bobbin 24 as the thread package is wound, which results in the formation of a better, more stable thread package.

Winding spindle 22 and thread guide assembly 26 are driven by a motor 32 drive-connected to a rotatably supported intermediate drive shaft 34 by a belt drive 36. Drive shaft 34 is drive-connected through a gear type gainer mechanism 38 and a belt drive 39 to cam-type thread guide operating mechanism 40 (see FIGURE 4) by which thread guide assembly 26 is reciprocated. Shaft 34 is also drive-connected to winding spindle 22 by a belt drive 42.

Winding spindle 22 and thread guide reciprocating.

referred to hereinafter as the gainer housing. The gainer housing is provided with a base for supporting the 'housing on a stand shown diagrammatically and identified generally by reference character 48.

Motor 32 is mounted on a plate-like support 50 fixed to stand 48 subjacent the gainer housing base 46. The

details of support 50 are not critical in the practice of the present invention and may be varied as desired for particular installations.

Winding machine motor 32 is an especially designed single phase or polyphase electric motor which automatically slows down as the diameter of the thread package increases to maintain uniform tension and winding speed.

.Suitable motors having the foregoing characteristics are manufactured by the B. A. Wesche Electric Company of Cincinnati, Ohio. The performance characteristics of these motors are discussed in an article entitled Torque Motors And Brakes printed in the April 1957 issue of Product Engineering and in the copending Hambach application referred to above.

Turning now to FIGURE 2, thread winding machine motor 32 has a single output shaft 52 to which the drive pulley 54 of belt drive 36 is fixed as by a key (not shown) and a retainer 56 on the outboard end of the shaft. A flexible drive belt 58 extends around pulley 54 and around a driven. pulley '60 rotatably fixed to intermediate drive shaft 34 as by a key (not shown) and a retainer 62 on the end of the shaft.

As indicated above, intermediate drive shaft 34 is driveconnected to winding spindle 22 by a belt drive 42 which includes a flexible drive belt 64 extending around the pulley 60 fixed to intermediate shaft 34 adjacent drive belt 58. Drive belt 64 also extends around a driven pulley 66 rotatably fixed to winding spindle 22 as by a key (not shown) and a retainer 68 on the end of the Winding spindle.

Winding spindle 22 is rotatably supported by a winding spindle support arm 70 which, as the diameter of the thread package wound on bobbin 24 increases, permits winding spindle 22 to swing in an arc away from thread guide assembly 26 and hail 30 to maintain a substantially constant distance between the thread guide assembly and the outermost wrap of thread on bobbin 24. This eliminates the necessity, which obtained heretofore, of mounting the thread guide assembly on a pivotable arm or other pivotable support to provide the proper spacing between the thread package and the thread guide. As a result, several important advantages are obtained such as a great increase in winding speed, more accurate control of winding tension, and simplification of the winding machine mechanism, permitting it to be more economically manufactured and maintained. As shown in FIGURE 3, winding spindle support arm 70 has a rectangular sectioned, elongated midsection 72 and

cylindrical bosses

74 and 76 at the upper and lower ends of the midsection, respectively. Winding spindle 22 extends through an aperture 77 in the upper boss 74 from which it is supported by a pair of rolling element type bearings such as ball bearings 78 and 80. Ball bearings 78 and 80 are disposed in annular recesses 82 and 84 which are concentric with aperture 77 and are located at the opposite ends of boss 74. Winding spindle 22 is retained in boss 74 by an annular shoulder 86 on the spindle which engages the inner race 88 of ball bearing 80 and by a lock nut 90 threaded on the winding spindle and engaging the inner race 92 of ball bearing 78.

Referring still to FIGURE 3, cylindrical bobbin supports 94 and 96 are mounted on winding spindle 22 adjacent support arm 70 and adjacent the outboard end of the winding spindle, respectively, to support bobbin 24 which, as illustrated, is a cylindrical cardboard tube although any desired type of bobbin may be used.

Radial flanges

98 and 100 on bobbin supports 94 and 96, respectively, provide axially extending,

circular projections

102 and 104 which maintain bobbin 24 concentric with winding spindle 22 and

annular projections

106 and 108 which maintain the bobbin in a fixed axial relation with the winding spindle.

The inboardb-obbin support 94 is fixed to winding spindle 22 as by a setscrew 110. Outboard bobbin support 96 is removably-retained in place by a knurled knob 112 provided with a drilled and tapped shank 114 into which the outboard end portion 116 of the winding spindle is threaded. By unscrewing knob 112, outboard bobbin support 96 may be removed, permitting bobbin 24 to be dotfed from the winding spindle.

Support arm 70 is pivotably supported from gainer mechanism housing 44 by the'boss 76 at the lower, supported end of the spindle support arm which extends through a circular aperture 118 in gainer housing vertical wall member 120 in which a sleeve type bearing 122 of bronze or other bearing metal is disposed to rotatably support boss 76. Bearing 122 may be retained in aperture 118 in any desired manner such as by press fitting. Boss 76 is retained in place by an annular shoulder 124 on the boss. which engages one side of bearing 122, and by a friction disc 126, preferably offiber or bronze, surrounding boss 76 and abutting the opposite side of bearing 122. Friction disc 126 is maintained in abutting relationship with hearing 122 by a lock nut 128 threaded on boss 76.

Boss 76 has a central aperture 130 through which the intermediate drive shaft 34 described above extends. Shaft 34 is rotatably supported in aperture 130 by rolling element type bearings such as the illustrated

ball bearings

132 and 134. Ball bearings 1132 and 134 are mounted in

annular recesses

136 and 138 which are concentric with aperture 130 and are located at the opposite ends of boss 76. Intermediate drive shaft 34 is retained in boss 76 by a lock nut 140 threaded on shaft 34 which engages ball bearing 132 and by a spur gear 142 (see also FIGURE 1) fixed to intermediate shaft 34 as by a setscrew 144. A spacer or washer 145 on shaft 34 between bearing 134 and spur gear 142 prevents longitudinal movement of shaft 34 relative to boss 76 without impeding rotation of the shaft.

From the foregoing, it will be apparent that winding spindle 22 is pivotably or swingably supported by spindle support arm 70 for movement in-an 'arcuate path about an axis which is coincidental with the axis of rotation of intermediate drive shaft 34. This permits spindle 22 to move or swing away from thread guide assembly 26 and bail 30 as the diameter of thread package 28 increases to maintain a constant distance between the outer wrap of thread on the package and thread guide assembly 26. Since the last-mentioned axis is also the axis of revolution of pulley 60, the center-tocenter distance between the axes of rotation of

pulleys

60 and 66 remains constant, despite the movement of spindle support arm 70, and the tension in the belt 64 of belt drive 42 therefore also remains constant.

As pointed out previously, intermediate shaft 34 also drives the gainer mechanism 38 which, through operatrng mechanism 40, reciprocates thread assembly 26. The spur gear 142 described above and fixed to intermediate drive shaft 34 is the input gear of gainer mechanrsm 38.

- Referring now to FIGURE 1, input gear 142 meshes with a spur gear 146 which, together with a spur gear I148, forms. an intermediate gear assembly 150. Intermediate gears146 and 148 are fixed together for concomrtant rotation and are rotatably supported by a stub shaft-152.

Stub shaft152 to an intermediate extends norm-ally from and is fixed gear assembly support bracket 154 fixed to gainer mechanism housing wall member 120 by a cap screw 156 which extends through an elongated, slotted aperture 158 in bracket 154 into threaded engagement with the housing wall member. The elongated slot 158 permits universal movement of support bracket 154 in a plane parallel to the gainer mechanism gears, permit-ting gears of varying diameter to be mounted on stub shaft 152 and moved into meshing engagement with the cooperating gears of the gainer mechanism. Bracket 154 is retained in the position to which it is adjusted by tightening cap screw 156.

Gear 148 of intermediate gear assembly 150 meshes with a spur gear 160 fixed to the end of an intermediate drive shaft (162 (see also FIGURE 2). The rotation of shaft 162, acting through operating mechanism 40', effects reciprocation of thread guide assembly 26 axially of winding spindle 22 to guide the thread onto bobbin 24. The gainer mechanism so relates the simultaneous rotation of bobbin 24 and reciprocation of thread guide assembly 26 that one wrap of the thread guided onto the bobbin will not be laid exactly on top of the preceding wrap as this would produce a highly unstable package. The functions of gainer mechanisms and the manner in which they operate are described in detail in the copending Hambach application identified above to which reference may be had if deemed necessary for an understanding of the present invention.

Referring now to FIGURE 2, gainer mechanism housing wall member 120 is formed with

integral bosses

164 and 166 extending, respectively, inwardly and outwardly from the wall member. Shaft 162 is rotatably supported in an aperture 167 extending through the wall member and

bosses

164 and 166 by rolling element type bear ings such as ball bearings (not shown) located in recesses at the exposed ends .of

bosses

164 and 166, respectively. Shaft 162 is retained in aperture 167 by an annular shoulder 176 of the shaft and by a lock nut 17'8 threaded on the shaft.

Supported on intermediate drive shaft 162 adjacent lock nut 178 is the drive pulley 180 of belt drive 39 which is rotatably fixed to the shaft as by a key (not shown) and a retainer 182. A flexible drive belt 184 extends over pulley 180 and around a driven pulley 185 fixed to a cam shaft 186 as by a key (not shown) and a retainer 188.

Referring now to FIGURES 2 and 4, cam shaft 186 is fixed to the inboard end of an elongated, cylindrical cam 190 in the surface of which a closed, helical groove or cam track 192 is formed. Cam 190 is rotatably supported in a housing 194 supported in cantilever fashion from gainer mechanism housing wall member 120 in parallel, spaced, side-by-side relation to winding spindle 22 as by cap screws (not shown) or other appropriate fasteners. The details of cam 190, the manner in which it is mounted in housing 194, and the manner in-which the latter is attached to the gainer mechanism housing are not critical in the practice of the present invention and are disclosed in detail in copending application No. 298,040, referred to above. Further elaboration of these details is therefore not deemed necessary herein.

The rotation of cylindrical cam 190 moves a cam follower 196 rectilinearly along a path parallel to the cams axis of rotation and parallel to the longitudinal axes of winding spindle 22 and bail 30. Cam follower 196 includes a uniformly thick, enlarged width lower portion 198 which depends into cam track 192 and an upwardly directed stem 200. Stem 200 extends into a downwardly opening, cylindrical, blind aperture 202 in a captured slide block 204, which is preferably formed from Nylon or other material having a low coeflicient of friction. Cam follower 196 and slide block 204 are thus fixed for concomitant movement, but the cam follower may pivot relative to slide block 204 to follow cam track 192.

As shown in FIGURE 4, slide block 204 is disposed in an elongated slot or opening 206 formed in the top of and extending the length of cam housing 194. The movement of slide block 204 is guided by

adjustable slide plates

208 and 210 fixed to cam housing 194 on opposite sides of aperture 206 by screws 212. Screws 212 extend through elongated slots 214 in the slide plates (which permits ad justment of the slide plates) into threaded engagement with housing 194 (see FIGURE 5 The opposite edges of

slide plates

208 and 210 extend into cooperating

recesses

216 and 218 formed in the opposite sides of slide block 204 to confine the movement of the slide block to a rectilinear path.

Slide block 204 supports thread guide assembly 26 which includes a sheet metal guide member 220 with a bottom flange 222 fixed to the top surface of slide block 204. Guide member 220 also includes an intermediate portion 226 extending at substantially a right angle to bottom mounting flange 222 and a bifurcated upper guide portion 228 extending upwardly at an angle from intermediate portion 226. The two

bifurcations

230 and 232 of guide member upper portion 228 guide the thread being wound into an eyelet 236, fastened to guide member 220, through which the thread being wound runs as it is wound onto bobbin 24. Eyelet 236 is preferably formed from a ceramic or other wear resistant material to extend its useful life.

As shown in FIGURE 5, upper and

lower dust shields

238 and 240, which are sheet metal members extending the length of cam housing 194, are mounted on

slide plates

208 and 210 and fastened to the cam housing by the same screws 212 employed to fix the slide plates to the housing. Upper dust shield 238 has an integral shielding portion 242 which spans opening 206 in housing 194 and terminates in an edge adjacent the intermediate portion 226 of guide member 220. This shield also has a vertically extending shielding portion 244 forming a seal between shielding portion 242 and the cam housing on the side of aperture 206 on which slide plate 208 is mounted.

Lower dust shield 240 has an upstanding shielding portion 246 which forms a seal between slide plate 210 on the opposite side of aperture 206 from upper shield 238 and the intermediate portion 226 of guide member 220.

It will be apparent, from the foregoing, that the two shields cooperate to substantially span the gaps between the opposite sides of guide member 220 and the housing portions on the opposite sides of aperture 206, minimizing the entry of foreign matter through aperture 206 into the interior of cam housing 194.

The thread guide assembly described above is an im portant feature of the present invention since it has no pivotable traverse arm as was heretofore employed to support the thread guide assembly in order to properly guide the thread being wound onto the bobbin. As a result and as discussed in more detail above, this permits substantially higher winding speeds, increases the accuracy with which the desired winding tension may be maintained, and results in a simpler and more economical thread winding machine.

Referring now to FIGURES 2 and 5, another extremely important feature of the present invention is the rotatable bail 30 provided to exert a constant and substantially uniform pressure on the thread being wound onto bobbin 24. Rotatable bail 30 is a cylindrical member (see FIGURE 4) supported in parallel spaced relationship to cam and winding spindle 22 by reduced diameter end portions 248 and 250 which extend into apertures 252 and 254 in, respectively, cam housing end wall 256 and an end plate 258 attached to the outboard end of the housing. Ball or other rolling

element type bearings

260 and 262 are disposed in apertures 252 and 254 around the bails reduced diameter end portions 248 and 250 to minimize frictional resistance to rotation of the bail.

As shown in FIGURE 1, the outermost wrap Otf the thread package 28 being wound on bobbin 24 rests on bail 30. The weight of spindle support arm 70, spindle 22, bobbin supports 94 and 96, bobbin 24, and the thread being wound thereon exert a substantial force on bail 30. The bail, in turn, exerts an equal and opposite force on the thread package 28 being wound on the bobbin, producing a more stable and better package than is possible in those winding machines where no force is exerted on the thread package and in a much simpler manner than has heretofore been possible in those machines which have made provision for exerting force on the package.

Preferably, winding machine 20 is so designed that,

.as the winding proceeds and spindle 22 swings away from bail 30, the force exerted by the bail on thread package 28 remains substantially constant or decreases slightly. This is done by designing the thread winding machine so that, as the package is wound, spindle 22 moves through an arc of predetermined magnitude such that the decreasing proportion of the dead Weight exerted as a force on bail 30 is offset by an increase in total dead weight due to the constantly increasing Weight of the thread. Referring now to FIGURE 6, the manner in which the magnitude of this arc is determined is as follows:

To solve [for P =P0 with C*= 15 lbs: 7

Symbols:

0 =Arm angle at start of winding operation (bobbin 24 resting on bail 30). 0 =Arm angle at end of winding operation (thread package 28 wound to maximum desired diameter). C=Dead weight. Includes: (a) Weight of spindle 22 and bobbin 24.

(b) Weight of spindle support arm 70. (c) Friction load of snubbing device 263.** P=Pressure force on package.

Constants:

20 lbs. assumed as final package weight.

12 inches assumed as distance between longitudinal axes of winding spindle 22 and intermediate shaft 34. 3 inches assumed as diameter of bobbin 24. 12 inches assumed as maximum diameter of thread package 28.

Assume:

s= e Then,

P0 =C cos 0 and v P0 =C cos 0 +20 cos 0,,

To determine 0 and 0 sin /z (0 0 =2.25/12 sin /2 (0 0 =0.188 and sin 0.188=5O' Thus 0 -0,=2140' If 0,=53, then 0,:75", P0 =10.4 lbs., and P0 =9.1 lbs.

*Determined by experiment for each winding application.

**Required to keep thread package 28 from bouncing at the high winding speeds attainable by the winding machines provided by .the present invention.

' Depending upon the type of thread being wound, for example, the force exerted by bail 30 on thread package 28 must be varied in order to produce thread packages of optimum quality and stability. This is accomplished by threading lock nut 128 (see FIGURE 3) along intermediate shaft 34 to thereby vary the normal pressure between sleeve bearing 122 .and [friction disc 126 and between friction disc 126 and lock nut 128, which eleinents collectively constitute a snubbing device 263. This varies the frictional force opposing the pivotal movement of package support arm 70. As is apparent from the equations derived above, by varying the friction load of snubbing device 263, the dead weight C and, therefore,

the pres-sure P exerted on thread package 28 is altered by varying the foregoing frictional force since this force is a component of the dead weight parameter C. Depending on the particular thread being wound, a bronze or fiber friction disc 126 is employed to provide the proper frictional load.

Thread winding machine 20 is also provided with an operating knob 264 fixed to the upper end of a lever arm 266 threaded into the upper Winding spindle supporting boss 74 of winding spindle support arm 70. Operating knob 264 permits the thread winding machine operator to swing Winding spindle support arm and, therefore, thread package 28 from the running position shown in full lines in FIGURE 1 to the alternate position shown in phantom lines in which thread package28 may more readily be doffed. A stop 268, threaded into gainer mechanism housing wall member 120, supports arm 70 and thread package 28 when the latter are in the alternate position. After the thread package 28 is doffed and a new bobbin 24 mounted on winding spindle 22, operating knob 264 may beemployed to pivot Winding spindle support arm 70 in the counterclockwise direction (as viewed in FIGURE 1) to return the mechanism to the running position with bobbin 24 resting on bail 30.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What is claimed and desired to be secured by Letters Patent is:

1. A thread winding machine, comprising:

(a) a bobbin supporting winding spindle;

(b) a winding machine housing;

(c) means supporting said spindle from said housing including a spindle supporting arm and means at the lower end of said arm mounting said arm for unrestrained rotation relative to said housing, said winding spindle being rotatably journalled by said arm at the upper end thereof; and

(d) a thread guide traverse assembly fixed to and extending from said housing, said assembly including a rotatably mounted spindle supporting bail disposed below and extending parallel to said winding spindle, said bail being fixed relative to said housing and the axis of rotation of said arm being so located relative to said bail and the length of said arm being such that, as the diameter of the package of thread wound on the bobbin supported by said spindle increases and the winding spindle moves upwardly away from said bail, the increasing Weight of the thread provides a force offsetting the decrease in the force exerted on the bail by the winding spindle to thereby maintain the force exerted on the thread package by the bail substantially constant.

2. The thread Winding machine as defined in claim 1, together with means for rotating said winding spindle, comprising a motor, an intermediate drive shaft rotatably supported in a bore through the lower end of the spindle supporting arm and first and second drive belts trained over a pulley fixed to said shaft, one of said belts driveconnecting said motor to said shaft and the other driveconnecting said shaft to said Winding spindle.

3. The thread winding machine as defined in claim 1: (a) wherein said thread guide traverse assembly further includes a thread guide traversing cam and a reciprocable thread guide operatively connected to said cam for reciprocation thereby; and Y (b) including a gainer mechanism having its output member operatively connected to said thread guide traversing cam;

(c) a motor; and

(d) a belt drive including at least one rotatably supported intermediate drive shaft drive-connecting said motor and said winding spindle, the input member of said gainer mechanism being fixed to said intermediate shaft.

4. A thread winding machine, comprising:

(a) a winding machine housing with a Wall member having an apertured boss;

(b) a winding spindle;

(c) means supporting said winding spindle for pivotal movement relative to said housing including a spindle supporting member journalled at one end in the aperture through said boss, said member rotatably supporting said winding spindle at the opposite end thereof; and

(d) selectively adjustable snubbing means for varying the frictional force between said boss and the end of the spindle supporting member journalled therein;

(e) said spindle supporting member terminating in a boss extending through the aperture through the winding machine housing and having an annular shoulder abutting one side of said wall member; and

(f) said snubbing means comprising a retainer threaded on said boss on the opposite side of said wall member from said shoulder and a friction disk surrounding said boss and disposed bet-ween said wall member and said retainer.

5. The thread winding machine as defined in claim 3, wherein:

(a) the input and output members of said gainer mechanism are spur gears rotatable about fixed centers and said gainer mechanism further comprises:

(b) a pair of intermediate gears of dissimilar pitch diameters fixed for concomitant rotation and meshing, respectively, with said input and said output gears, and means mounting said intermediate gears for selectively adjustable displacement in a plane normal to the axes of rotation of said gears.

6. The thread winding machine as defined in claim 3,

together with a belt drive drive-connecting the output member of the gainer mechanism to the thread guide traversing cam.

References Cited by the Examiner STANLEY N. GILREATH, Primary Examiner.

Claims

1. A THREAD WINDING MACHINE, COMPRISING: (A) A BOBBIN SUPPORTING WINDING SPINDLE; (B) A WINDING MACHINE HOUSING; (C) MEANS SUPPORTING SAID SPINDLE FROM SAID HOUSING INCLUDING A SPINDLE SUPPORTING ARM AND MEANS AT THE LOWER END OF SAID ARM MOUNTING SAID ARM FOR UNRESTRAINED ROTATION RELATIVE TO S AID HOUSING, SAID WINDING SPINDLE BEING ROTATABLY JOURNALLED BY SAID ARM AT THE UPPER END THEREOF; AND (D) A THREAD GUIDE TRAVERSE ASSEMBLY FIXED TO AND EXTENDING FROM SAID HOUSING, SAID ASSEMBLY INCLUDING A ROTATABLY MOUNTED SPINDLE SUPPORTING BAIL DISPOSED BELOW AND EXTENDING PARALLEL TO SAID WINDING SPINDLE,