US2348889A - Coil winding device - Google Patents

Description

May 16, 1944.

J. A. EARL 2,348,889

COIL WINDING DEVICE Filed March 4, 1943 2 Sheets-Sheet 1 INVENTOR.

HTTOE/VEY I 11.1% 1944. J. A. EARL 2348889 COIL WINDING DEVICE INTOR.

AEL.

fiTTOE/VEY drawn through the apertures.

Patented May 16, 1944 UNITED STATES ems:

comwmpnsonavrcs lohnaEar-hlaGrangallha-laignortowestern mm Com PM! N. Y., a corporation Incorporated, New York, of New York Application March 4, 194:, Serial No. 478,037

(Cl. ca-4) 6 Claims.

This invention relates to coil winding devices and more particularly to devices for manually winding toroidal coils.

An object oi the invention is to provide a simple and practicable device for eificiently and economically winding toroidal coils manually.

In accordance with the above object, the present invention, in one embodiment thereof, as applied to the winding of toroidal coils of a certain type used in the electrical arts, the dimensions of the coils being so minute that automatic winding machines cannot be employed practically, comprises a pair of plates each fixed to and extending perpendicularly from base members connected together by a hinge, the arrangement being such that the plates are maintained in predetermined relation when the base members are normally supported upon their lower faces. The upper ends of the plates are apertured and are counterbored in opposite directions to provide a circular recess for holding an annular core during the winding of a fine wire helically thereon to form a toroidal coil. A plurality of circularly arranged apertures are provided in the plates about the axis of the recess, the apertures in each plate being aligned with the apertures of the other plate when the plates are abutted. Formed in the plates and extending radially from each aperture and into the recess is a narrow slit. In using the device, a core is mounted in the recess and then an ordinary sewing needle having a e wire threaded therethrough is passed through a set of. the aligned circularly arranged apertures from one side of the device until apprommately one-half of the length of wire is Thereafter, the needle is passed through the core opening from the opposite side and then through the set of apertures next to the first set of apertures and continuing around the core in one direction to complete one-half the number of convolutions the wire being pulled through a slit each time, thus accurately guiding the wire and positioning, in spaced relation, the convolutions of wire on the core. The needle is then removed from the wire and the opposite end is threaded theret and the operations repeated for the other of the core in similar manner.

Other objects and advantages oi the invention will more fully ar from the following detailed desc ption, taken in conjunction with the --i:- s, in which Fig. l is an end view of a toroidal coil winding device embodying the features at the invention shown mounted on a bench fixture at a convenient angle for an operator who faces the left hand side thereof;

. 2 is enlarged fragmentary side view oi" the upper end of the device taken on the line 2-2 of Fig. 1;

Fig. 3 is a vertical section taken on the line H of Fig. 2, showing a toroidal core in position for winding and the manner of winding the wire convolutlons thereon; and

r'lgcisanenlargedperspectiveviewoia. toroidal coll after-completion and removal from the winding device.

Referring to the drawings in detail, I. and II indicate base members hinged together, as indicated at l2, and channel-shaped at their lower faces to provide projecting foot-like supporting portions i3. Inner opposed vertical faces ll of the base members I. and II are slotted at It and fixed therein are perpendicularly extending plates ll, having their outer faces, which are shown abutting in Fig. 1,1in the plane of the faces M of the base members. It will be apparent, with the base members II and II hinged in the manner shown, coincident with their inner faces N, that when the device is resting upon the portions I! or is mounted at an angle on a bench fixture, indicated in'general at ll, inner faces IQ of the plates II will be maintained in abutting relation. To separate the plates ll, one or the other of the plates or base members is grasped and slightly elevated, whereupon the plates readily,separate.

The plates ll, at their upper ends, which are reduced in thickness from the point 20 outward- 1y, as shown in Fig. 3, are each formed with a counterbored aperture 2|, the apertures being oppositely directed and in alignment when the plates are abutted. With the plates I! thus positioned. the larger diameters of the apertures 2| form a circular recess 24 open at both ends for .ireely peripherally receiving and supporting a toroidal core 25 placed in the aperture in one of the plates when the plates are separated. the

. core being prevented from moving axially from the recess when the plates are abutting by annular shouldered faces 26 at the Junctures between the larger and smaller diameters of the apertures 2 I. Formed in each of the plates I! in circular arrangement and spaced a suitable distance from and radially about the axis of the apertures 25 are a plurality of equally spaced apertures 21!, which are tapered at their outer ends as indicated at 28. In the present embodiment, forty such apertures 21 are provided and the apertures in one plate ii ar in alignment with the apertures in the companion plate when the plates are abutted as shown in Fig. 3. Extending radially from each of the apertures 21! and into the recess 26 in each plate H, is a marrow slit 8!, the inner ends of the material between the slits belng rounded or blunted, as shown at 32L To insure accurate client of the apertures 2t, 27! and slits 8! of each plate 87 with those of the companion plate in case of play or looseness at the hinge it when the plates II are abutted. one of the plates carries a fixed pin 33 which enters an aperture 34 in the other plate and insures accurate alignment or the gplllates and thus the described apertures and In the use of the device, the plates" are separated in the manner previously described and a core 26 is placed in the aperture 2| of one of the plates l'l. After abutting the plates 11, the core 25 wilij be contained in the recess 24 and upon either resting the device upon its foot-like portions it on a horizontal support, or, as shown in Fig. l in the bench fixture is, in which it'isarranged at a convenient angle for an operator, the plates 11 will be maintained in abutting relation to-holdthe core 2i' therebetween. The operator then uses an ordinary sewing needle 35 (Figs-l and Brwith a fine wire 36 of suitable length threaded therethrough and passes the needle through 6ne*'set of the aligned circularly arranged apertlires 21- from the forward side of the device to the rear side thereof and then passes it through-the center of the core to the-forward side; l'ih'e wire is drawn sufficiently taut to move it through the slit ll communicatingwith the particular aperture 21 and into engagement with and around the core. The slit 3i serves to definitely guide-the wire 36 and position the convolutioii'lthereof' on the corefl and spaces it froinf'the adjacent convolutions' of wire to he would "on the core. A preferred manner of winding the bore 25 comprises drawing approximately one-half of the wire through the first set. of apertures 21 and then continuing around .the core ineither direction to complete succesive convolutions 'in the manner above described until one-half of the convolutions are completed.-

To retain the end of the wire to opposite the end threaded through-the needle 35, it lswrapped around a pin ti on the plate H at the forward side of-the device. Thereafter, the needle 35 is removed from the wire 36 and a suificient len h ofvwire remains to provide a terminal or lead portion' ffl (Fig. 4) The opposite end of the wire ii is then detached from the pin 31 and threaded onto the needle l and thewiring of the other half of the core li'is started in a direction opposite to the'first winding operations by threading' the wire 381 first through the center of the core it the'forward side of the device and then fi'rcm 'th jrear side of the device through the set adjacent the first set of apertures used'inwindinffthe'Tfirst half of the core, the operations continuing until the entire core is wound, whereupon the needle is removed from the wire and a sufficient length of wire remains to provide a terminal or lead portion 39 (Fig. 4)

Before removing the wound coil from the device by separating the plates H in the manner previously described, astrand ll of insulating material is threaded through the center of the .coil and tied at a point between the two convolutions of.wire .,which terminate with the lead portions 38' andflsztp insure complete separation thereof and,thu s preventa. drop in the potential of the coil. Also, before the removal of the wound coil from, the is v d through the center of the coil. The pin ll serv as a means for mounting the coil in the mechanism on which the coil is used.

It will be understood that although, in the emshown in the drawings.

bodiment of the device shown and described, the apertures 21 and slits 3| are equally spaced completely around the recess 24 for winding 0. parvaried for other types of coils. For instance, the convolutions of wire may be arranged in spaced ,ticular form of coil, this arrangement may be' groups and further that the slits 3| in certain arrangements of convolutions could be arranged parallel to each other instead of extending radially relative'to the axis-of the recess 14, as Also, it is not necessary that the plates be abutted in all cases, as is shown for the-particular coil being wound.

All

It will be understood that the embodiment herein described is merehr illustrative of the invention and one application'thereof and that modifications can be made and it is capable of other applications.

Whatisclaimed'isr a.

l. A device for manually winding toroidal coils comprising means for supporting a core, said means being slitted at a plurality of points extending outwardly from and communicating with a core supported thereon to guide a strand to be annularly wound with the convolution: thereof in spaced relation upon the core.

2. A device for manually winding toroidal coils comprising recessed means for supporting a core therein, said means being slitted at a plurality of points extending outwardly from the recess and opening thereinto to guide a strand to be annularly wound with the convolutions thereof in spaced relation upon the core.

3. A device for manually winding toroidal coils comprising a pair of apertured members effective when predeterminedly associated with each other to support a core in the apertures thereof, said members being slitted at a plurality of points extending outwardly from the inner peripheries of the apertures to guide a strand to be annularly wound in spaced relation upon the core.

4. A device for manually winding toroidal coils comprising a pair of apertured members effective when predeterminedly' associated with each'other to support a core in the apertures thereof, said members having a plurality of radially directed slits extending outwardly" from the inner peripheries of the apertures to guide a strand to be core in the apertures thereof, said members bedevice, a pin ll of insulatingmaterial ing slitted at a plurality of equally spaced points extending outwardly from the inner peripheries of the apertures to guide a strand to be annularly V [wound in equally spaced relation upon the core.

6. A device for manually winding toroidal coils comprising a pair'of hinged members adapted to be abutted and having'alignable counterbored oppositely directed apertures providing a recess for supporting a core therein, said members being slitted at a plurality of points extending out-v wardly from the recess and opening thereinto to guide a strand to be wound with the convolutions thereof in spaced relation upon the'core.

JOHN A. EARL.'

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