US2425511A - Toroidal coil winding machine - Google Patents

Description

A'llg. l2, 1947. R, VM, CQNKLIN 2,425,511

'.IOROIDALv COIL IINDING CHINE IFilm1 Aug'. 22, 1945 2 sheets-sheet 2 FIG .3

al 2s z2 Y s as 2s [Nys/v To@ RM CON/(LIN er Arromvr Y ly o ccuras a result winding type wherein the vwire Patented Aug. l2, 1947 TonomAL con. WINDING e n f Robert M. conkun, signor to Western West Newbury, Mass.;l as- JQ ElectricCompany, Incoi'po-v pf rated,New York, N. Y., a corporation oi New o York4 l, Application AugustfZZ, 1945,"Serial No.` 11,935 f slolalnis, This invention relates to winding machines,

and more particularly to improvements in `to roidal coil winding machines.

In winding toroidalcoils, diiiiculties occaslonalof the formingof aA loop in the wiredurlng rotation of `the winding ring in its, circular path through thel annular core upon which the wire is being wound. The loop, or length of wire which is to form the next turn upon the core, is withdrawn from the winding ring as the Wire guide thereof leaves the core and travels toward the farthest position away fromA the core. One of the diillculties arisingv from the existence of the' loop in` the wire is that, during the travel of the wire guide from the iarthest position toward thev core, occasional breakage of the wire occurs due to the jerking of the wire in closing the loopa-bout the core. Another diiliculty'lies in the overlaying of the tunis of wireI ony the 'core 4tis a result of the loop in the wire being uncontrolled and allowed to .whip from one side to the other. An attempt was made to eliminate these ydiiliculties by' the` provision of a spring' loaded pressure pad func tioning in cooperation with a stationary' padto control the loop of Wire Yduring its advancement of 'the core as disclosed in Patent 2,367,489, issued to A. J. Dowd, January 16,4 194'5. It has been found, however, in actual practice thata single set of'pressure pads will control onlyabout half of the wire loop and -will not eliminate entirelythe undesirable conditionsawhich exist in the uncontrolled remaining portion of the loop.

'l object of this invention is to provide a winding machine,A particularly of the 4toroidaly coil formingeach turn on the coreis controlled toa point closely Lad-,v

-jacent the core. f

Inthe present" invention, movable pressure" l pads are'V disposedv'atV spaced positions "relative to a" iixedpadclosely adjacent acore upon which a' WireQis'to `bf`e'1`vound to control thewire in 'its adva'ncementtothev core, particularly the loop formed Vinl the wires V"I'hesp'ace'av between vthe pressure pads allows for thefredu'ction inthe size of the' lo`op"'r.ri`o1`-I tothe iinal releasingof the wire so that it may complete its turn on the core.

Other objects and advantages will be apparent from the following detailed description when considered in conjunction with the accompanying drawings, wherein:

Fig. 1 is afragmentary side elevational view of a toroidal coil winding machine embodying the invention;

kthe other half ofthe core.

Fig', 2 isv afragmentary sectional View "taken alongthe line 2'2 of Fig. 1; f t

Fig. y3 is a schematic illustration-of 'the various positions of4v the 'wire `withdrawnfrom the winding ring'fduringfthel forming of one turn on the core;and

Fig, 4 ,is an View of the structure shown in Fig. 2.

To illustrate the invniaon, only those portions of the toroidal coil windingf machine essential for this purpose have been. shown in the drawing. In general, the machine includes a `chuck or clamp I0 for supporting an annularcore I I' upon whichturns of wire I Z'arefto be formed. The chuck I0 is supported byrsuitable means (not shown) to rotate the core labout its axis back and forth forvapproximatelyv one-half revolution to 'cause' distributionof the wire, first upon approximately one-half vof.;the core. and then upon I2 for one-half of the fcoil .iswound in a reverse directionfon a windingfzringmM." The winding ring Itis either splity or'providedWitha'removf able section` I5 so that the core may be positioned about' the ringv asillustrated,` in the drawings.

Thewinding ring is providedLWithgear teeth I6 at its innerperipheryfforinterengagement with a driving gear I1. The gearilis mountedupoii` a shaft I8 which is ydriven yin reverse directions," one for the winding of the'supply ofthe-wire upon the ring, and the other for'thefwinding' of the wire upon the'corea'f Rollers 20, rotatably mounted at Isuitably spacedv posltionshave an-v nular grooves in their peripheries to straddle the teeth ISJof the` ring' i4.' ,'Iyhe 4ring .I4 or the segment I5 thereof is provided With'suitablefwire guidingmeans ZItOguide-lthewvire as itpays off the ring and'isadvancedxoward the core. .l i

vmirino the' v normal. 'oberationI fof theimacvmne for windingf the" wire on fifth '"cor'e,.:"a .Plength fof- "sitionsl 22 .f to1'f2 hclusivaf'-as illustrated in:- Fi'gL; "g" ,movement-1 offfltlie: l:ring i I 4- wlthfthegidil I| iroxnithe 'Spositionf" 2=1 to the position 34, a .loop is formed in the length of wire.

The primary object of this viously stated, is to control this loop and to direct it to the portion of the core where it is to be laid substantially parallel with the previous turn on the core. I'his is accomplished through the aid of a stationary pad 36 and companion pads 31 and,38. The pad 36 may be enlarged`I fragmentary' sectional AArsupply ofthe wire invention, as preformed of suitable materials, the main portion 39 being formedl of a more wear-resisting material, such as steel, while the insert or other portion 40 may be formed of brass or other material which may provide a better gripping -surface to cooperate with the movable pads 31 and 38. The pad-31;. issupported in aslot' Mofa bracket 42 so `as to be able tofioat'therein under the control of its spring 43. The bracket -42 is mounted on the main frame of the machine at the rear of the ring I4, the portion in which the slot 4| is disposed being adjacent the center of the ring. A laterally' extending portion 44- ot the pad 31 engages a pin 45 which limits longitudinal movement of the pad, the pad, however,

. being free except under the force of the spring 43, to move away from the pad 36 a distance suicient to allow for the movement of the wire between the pads. The pad 38 is pivotally-supported at 4i in the groove 4l of the bracket 42. A spring 48 normally urges the free end of the pad 38 into engagement with the insert 40, of the pad 36 at a position spaced from the exit end ofthe pad 31 andvclosely adjacent the core. Thek force of the springs 43 and 48 may be varied by movement of adjusting screws- 49 and 50.

During the operation of the winding machine, the central portion of the length .of wire extending from the core Il to the guide 2| at position 21 in Fig. 3, engages the entrance Vend 5l of the pressure pad 31. ring I4 and guide 2l, through positions 28 to 34,

During the advancement of the inclusive, the wire isr pulled-between the pressure This pulling of the wire, which is in the form of a lopnnoes not vdisturb the wire which constitutes the lower half l of the loop. That portion of the wire originally positioned between the pressure pad 31 and the pad 36 continues. to move therebetween without advancing .the wire to present any portion of the lower half 4 `of the loop between these pads. the wire should be allowed to pa'ss directly upon l the core from between the pressure pads 3B and Therefore, if

31, a loop of appreciable size would exist and could not be controlledagainst whipping from 45 one side to the other, nor. from being jerked onto the core.` The space between the pressure pads 31 and 38 releases the loop so that it may be drawn tightly aboutthe pressure pad 38. The loop is thus reduced to a size substantially close to theloop or turnlt will form on the core before the wire is released to iinally lay on the core. This is clearly illustrated in liig 3, wherein the loop of wireis reduced to substantially the size ofthe turn it will form on the coreand is directedA to the portion on the core where it is to lie. By so guiding the wire on the core, a greater number of turns of wire may be laid on the core in the same winding space allowed. This Vim..

` proved space factor results in wider inductance range and in higher quality factors which improve the performance of such coils for the particular apparatus for which they are to be used. Although specific improvements of the invention have been shown and described, it will be understood 'that they are but illustrative and that various modifications may be made therein with- 5 ing ring, for a supply of wire, rotatable in a circular path through an annular core to wind turns of the7 wire on'the core, a stationary .pad extend- 4ing inwardly of the winding ring from a position adjacent the core, an inner pressure pad having 10 its' entrance end for the wire positioned adjacent ,theY center of the winding ring and its exit end disposed short of the end of the stationary pad adjacent the core, means to normally urge the inner pressure pad towards the stationary pad l5 to cause the pads to grip and control movement of a loop of the wire moving toward the core, and an outer pressure pad normally engaging thestationary pad at the end thereof adjacent the core and spaced from the exit end of the inner pressure pad whereby the loop of wire will Y beheld until it is reduced to substantially the size of the turn it will form on the core.

2. In a tcroidal coil winding machine, a winding ring, for a supply of wire, rotatable ina circular path through an annular core to wind turns y `of the wire on the core, a stationary pad extending inwardly of the winding ring from a position adjacent the core, an inner pressure lpaci having its entrance end for the wire positioned adjacent the center of the winding ring and its exit end disposed short of the end of the stationary pad adjacent the core, means to normally urge the inner pressure pad toward the stationary pad to cause the pads to grip and control movement of a loop of the wire moving toward the core, an

outer pressure pad spaced from the exit end of the inner pressure pad adjacent the outer end of the stationary pad. and means to cause the outer pressure pad to hold the wire against 0 movement onto the core afterlt leaves the exit end of the inner pressure pad until the loop in the wire has been reducedto substantially the size of the turn it will form on the core.

3. In a toroidal .coil winding machine, a winding ring, for a supply of wire, rotatable in a circular path through an annular' core to wind turns 011 the wire on the core, a stationary pad extending inwardly of the winding ring from a positionladjacent the core, an inner pressure pad having its entrance endv for the wire positioned adjacent the center of the winding ring and its exit end disposed short of the end of the stationary pad adjacent thecore, means to normally urge the inner pressure Dad toward'the stationary pad to cause the pads to grip and control movement of a loop of the wire moving toward the core. an outer pressure pad normally engaging the stationary pad at `the lend thereof adjacent the core and spaced from the exit end of the inner pressure pad whereby the loop of wire will be held until it is reduced to substantially the size of the turn it will form on the core, and means to vary the pressures of the inner and outer pressure pads on the stationary pad and the loop of wire when passing therebetween.

ROBERT M. CONKUIN.

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