US2367489A - Winding apparatus - Google Patents

Description

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A. u. Do'wn `WINDING APPARATUS Filed Aug. 1o, 1943 2 Sheets-Sheet l /Nl/E/V TOR A J. DOWD I By @7K/41.74

A TTDPNEV A. J.. DOWD WINDING APPARATUS Filed Aug. l0, 1943 2 Sheets-Sheet 2 F/VG. 5

ATTORNEY l mensa nais, i945` UNITED STATES- PATENT ,ori-ics i ,wmDrNG APPARATUS Archie J. powa, rumana, N. J., minor to western Electric Company, Incorporated, New York,

N. Y., a `corporation of New York Application August 1o, 194s, serial No. 498,072 1o claims. ici. 242-4) This invention relates to winding lapparatus and more particularly to an improvement in apparatus for winding toroidal coils.

It is an object of the present invention to provide an apparatus -for more accurately controlling the application or wires to toroidal cores.

In accordance with one embodiment o! the lnvention, a winding machine of the general type disclosed in the co-pending application of A. L. Quinlan, Serial No. 422,195, tiled December 9, 1941, which issued onAugust 17, 1943 as Patent No, 2,326,969, is provided with a wire guiding or tension`controlling mechanism which comprises a spring-pressed bar extending from a position adjacent to the .point of applicationof a strand on the core` to the center -rotation oi the winding ring, from which the strand is withdrawn, to press the wire against a back tension plate of the apparatus and during the portion oi the Winding operation when slack would normally be formed in the wire, the wire from the spring-pressed bar until ilnally drawn therefrom ronto the core, thus eliminating the possibility oi a loose or slacls loop of wire forming in the apparatus.

A clear understanding of the invention may be had by reference to the following detailed description when considered in'conjunction with the accompanying drawings, wherein Fig. 1 is a fragmentary side elevational view of a winding mac e embodying the features of the present invention, portions of the core holding mecha being broken away and the core being shown in section to more fully illustrate the relative position of the core and windins rins: A

Fig. 2 is a fragmentary sectional view taken substantially along the line 2-2 of Fig. 1 in the direction of the arrows showing some details oi the'tension controlling mechanism and also showing the drive for the winding ring;

.,Fg. 3 is an enlarged fragmentary detail view taken substantially along the line 3--3 of Fig. 1v in the direction of the' arrows showing some details of the support for the wire tension controlling bar;

Fig. 4 is a transverse vertical sectional View taken substantially along the line 4-4 oi' Fig. 1 in the direction of the arrows;

Fig. 5 is ak detailv view in perspective of the guide or tensioning bar, the springs upon which the bar is mounted being shown in dot and dash lines in the position they occupy in the apparatus; and

path which the wire follows during the rotation of the windingv ring to apply wire on a core, which is shown in dot and dash lines.

In the drawings, a split winding ring I0 o! the type disclosed in detail in the co-pending applicationl of Amos L. Quinlan, Serial No.v 422,195, iiled -December 9, 1941, is shown mounted for rotation on a series of grooved guide wheelsl II, i2 and I3. The two guide wheels II and I2 are mounted to rotate freely .on stud shafts I4, one

of which is shown in Fig. 4, whereas the guide` wheel I3 is mounted on and freely rotatable with respect to a stud shaft I5. Both of the l stud shafts I6 are mounted on a'flxed base member IB, which also serves as a bearing for a drive shaft I1 (Fig. 2), carrying a driving gear i8 in mesh with gear teeth I9 formed on the inner annular surface of the winding ring i0. The stud shaft I5 is mounted upon an arm 25 of a bracket 26, which arm also has a handle member 21 mounted upon it, whereby, when there is no supply of wire wound on the winding ring, the ring may be separated to permit the insertion or removal ol a core 28 between jaws 29 and 30 of a clamping mechanism, which serves to hold a core in positiongduring the application or servings ofwire 3i to the core.' The bracket 26 is mounted on the fixed base member I6 by means of a pivot stud 32 threaded into the base member I6 and having a retaining nut 33 threaded on its upper end. A spring 34 compressed between theretaining nut 33 and the upper surface of the arm 25 of the bracket 26 will tend to maintain the' bracket in any A,position to which it may be moved by means of the handle 2l. 0f course.

the resiliency oi' the split winding ring will tend to return the arm 25 to the position shown particularly in Fig. 4, but the pressure of the spring lll is suiicient to hold it open to permit the removal or insertion of a core 28 between the clamping jaws 29 and 30.

The bracket 26 has a lower arm 40 fixed to it forsupporting suitable guide members in position to guide the wire 3| from the ring I0 into .position to be wound upon the core 28. An upwardly extending portion 42v of the arm 40 has adjustably mounted thereon a bar 43, which is, in turn, formed integrally with a guide plate M. The guide plate 44 is of non-uniform thickness, being thinner adjacent its periphery and'thicker toward the center thereof, whereby wire withdrawn from the ring I 9 during the rotation of the ring will be guided toward the center oi' the ring. The guide plate M has a core-receiving cutout 45 formed in it adjacent the clamping jaws 29 and 39 and has a slot 45 formed thereon (Figs. 2 and 4) through which a wire guiding bar 41 may be urged to bear against a guide plate 48, as shown most clearly in Fig. 6.

The guide plate 48 is mounted on the base member I6 and is cut out to receive the driving gear I8 and grooved guide wheels Il, I2 and I3. The wire guiding bar 41, as shown in detail in Fig. 5, has a beveled face 49 and a round body portion D. Extending from the surface of the round body portion 5I!4 of the guiding bar 41 opposite to the surf-ace which has the beveled face 49 formed thereon are a pair of T-shaped extensions 5I and 52. The T-shaped extension 5I is adapted to be received in a notch 53 milled into the left face (Fig. 4) of the guide plate 44 and the T-shaped extension 52 is adapted to be received in a slot 54 (Figs. 1 and 3), which is wider than the slot 46, but which constitutes an enlargement of the slot 45. T-shaped extensions 5I and 52 will, during the loading of acore 28 into the machine, engage the surfaces of the guide plate 44 when the guiding bar 41 is urged to the right (Figs. 3 and 4) and even though the bracket 26 is swung to a position where the guiding bar 41 will not strike the guide plate 48, the bar 41 will not drop out of the apparatus. Means for urging the guiding bar 41 in a direction to engage the heads of its T-shaped extensions 5I and 52 against the shoulders of their respective slots comprises a pair of pins 55 and 56 of exactly the same construction and having reduced portions 51-51 extending into suitable sockets 58 formed in the body of the guiding bar 41, as shown most clearly in Fig. 3. The pins 55 and 56 are rivetedto leaf springs 59 and 60, respectively, flxed to the lefthand surface (Fig. 4) of the guide plate 44 by means of short rounded head machine screws 6I and 62, and washers 63 and 64 are interposed between the springs 59 and 60 and the face of the plate 44, respectively, to space the springs 59 and 60 slightly from the face of the guide plate 44. Thus, when a new core 28 is being inserted in the machine to have a winding applied to it, the arm 40,- carrying the plate 44, may be moved counterclockwise from the position shown in Fig. 2 and although the guiding bar 41 is urged to remain in engagement The heads of the` with the plate 48, as described hereinafter, the

bar will not fall out of plate 44.

Intermediate their ends, the leaf springs 59 and '50 have apertures 65-65 formed in them, as shown most clearly in Fig.` 3, for receiving posts 66 and '61. The posts 66 and 61 are threaded at both ends, their inner ends being threaded into the plate 44 and their outer ends being adapted to receive lock nut assemblies 68 and 59, respectively. Inter-posed between the locknut assemblies 68 and 69 and their respective springs 59 and 60, through which the posts B6 andg61 extend, are sleeves 10 and 1I and coiled springs 12 and 13. In this manner, the leaf springs 59 and 60 may be urged toward the i guide plate 44 under a predetermined pressure and will thus, when the bracket 26 is in operating position, urge the wire guiding bar 41 to engage the plate 48 with the desired amount of pressure;

The arrangement of the wire guiding bar 41 with respect to the winding ring III is such that the portion of the bevelled face 49 which terminates in the -rounded portion 50 'of the bar 41 is exactly at the center of rotation of the windstantially 180 while the inner end pivots at the center of the ring. As the winding ring rotates further and distributes the wire, the wire will be wrapped from the inner surface of the annular core under the bevelled face 49 of the bar 41 to form a loop, as indicated at 8l). In this manner, the wire 3l will be maintained taut until the upper edge of the loop is laid onto the upper surface of the core 28 and the pressure exerted by the bar 41 against the back plate 48 will maintain this loop until the point of the winding ring from which the wire is distributed passes below the upper surface of the core, at which time the wire in the loop 80 will be drawn, as indicated progressively at 8| and 82, until the wire is wrapped around the core, the tendency for the wire to remain on the winding ring being just sufficient to overcome the spring pressure exerted on the guiding bar 41. In this manner, no loose loops of wire will be formed in the winding operation and the only time that the wire is not under some tension will be from theV time shortly after the loop 82 is formed until the wire is completely wrapped on the core. i

What is claimed is:

1. In a toroidal coil winding machine, a winding ring rotatable about a core to apply a strand to it, guide plates spaced apart slightly more than the width of the strand, and tension controlling means extending solely along a radius of the ring from a point adjacent to the core to the center of rotation of the ring for pressing the strand against one of the guide plates.

2. In a toroidal coil winding machine, a winding ring rotatable about a core to apply a strand to it, guide plates spaced apart slightly more than the width of the strand, tension bar guiding sur faces formed on one of said plates, a tension bar guided by said surfaces, and means for urging said bar to bear against the other plate.

3. In a toroidal coil winding machine, a Winding ring rotatable about a core to apply a strand to it, guide plates spaced apart slightly more than the width of the strand, tension bar guiding surfaces formed on one of the said plates, a tension bar guided by said surfaces extending from a point' adjacent the center of rotation of the winding ring to a point adjacent the core, and means for urging said bar to bear against the other plate.

4. In a toroidal coil winding machine, a winding ring rotatajyle about a core to apply a strand to it, guide plates spaced apart slightly more than the width of the strand, and means sipported by one of said plates and resiliently urged against the other plate to provide a pivot for the strand at the center of the winding ring.

5. In a toroidal coil winding machine, a winding ring rotatable about a core to apply a strand to it, guide plates spaced apart sligtly more than the width of the strand, and means supported by one of said plates and resiliently urged against the other plate to provide a pivot for the strand at the center of the winding ring, said last-men tioned means comprising a bar having a beveled face to cooperate with saidother plate to formV 6. In a toroidal coil Winding machine, a Winding ring rotatable about a core to apply a strand to it, guide plates spaced apart slightly more than the width of the strand, and means supported by one of said plates and resiliently urged against the other plate to provide a pivot for the strand at the center of the winding ring, said last-menl tioned means comprising a bar having a beveled face to cooperate with said other plate to form a notch to hold the strand until the strand is forced between the bar and said other plate and having a rounded surface for making a point contact with the strand after the strand slips under the bar.

'7. In a toroidal coil Winding machine, a Winding ring rotatable about a core to apply a strand to it, guide plates spaced apart slightly more than the width of the strand, tension bar guiding surfaces on one of said plates, a tension bar positioned between said surfaces, a pair of leaf springs mounted on and in spaced relation to said one plate, tension bar engaging pins on the free ends of said leaf springs, and means for urging said leaf springs to move the bar into engagement with the other of said plates.

8. In a toroidal coil Winding machine, a winding ring rotatable about a core to apply a strand to it, guide plates spaced apart slightly more than the width of the strand and movable relative one to another during loading of the machine, tension bar guiding surfaces on one of said plates, a tension bar positioned between said surfaces, a pair of leaf springs mounted on and in spaced relation to said one plate, tension bar engaging pins on the free ends of said leaf springs, v

strand engaging members, one of Which extends along a radius of the ring from the center offsaid ring to a point adjacent said core for engaging a strand being Wound to hold it stationary at said center While said ring rotates a portion of a revolution, said one member being resiliently mounted to yieldingly engage said strand along said radius during further revolution of the ring. Y

l0. In a winding machine, a Winding ring for carrying strand to be wound on a core, means for supporting a core eccentrically -in said ring,

means for delivering strand from a point inthe 'periphery of said ring, means for retardingly gripping said strand extending radially-from the center of said ring toward said core, means for rotating said ring to lay a loop `of strand from the core to the portion of the gripping means at the center of the ring. and then to pull said loop past said gripping means, and resilient means for actuating the gripping means with a force such that the strand will be held substantially sta-g tionary at the center of said ring during a portion of a revolution thereof and yieldingly released during another portion ofits revolution.

ARCI-IIE J. DOWD.

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