US243844A - James beady - Google Patents

Description

'(No Model) J. BRADY. V MACHINE FOR WINDINGELEGTRIGAL ARMATURE'S.

N0. 243,844. Patented Ju1y 5, 1881.

' M PETERS. Pnmoumu n ner, Willling'om ac,

UNITED STATES PATENT OFFICE.

JAMES BRADY, OF BROOKLYN, NEW YORK.

MACHINE FOR WINDING ELECTRICAL ARMATURES.

SPECIFICATION forming part of Letters Patent No. 243,844, dated July 5, 1881.

Application filed October 28, 1880. (No model.)

To all whom it may concern:

Be it known that I, JAMES BRADY, of Brook lyn, Kings county, New York, have invented an Improved Machine for Winding Electrical Armatures, of which the following is a specification.

This machine is designed specially for the winding of what is known as the Gramme ring-armatures, consisting of a ring or coil of wire forming the core of the armature, on which the induction-coils, of copper wire, are wound in closely-adjoinin g sections or segments, each one of which is distinct from the other and connected at each end with the commutator.

Heretofore the winding of the coils onto the core has been done by hand, which is a slow and laborious method, whereas I aim to effect the same in a more rapid and perfect manner by the present machine, which is of the same class as that shown in my former application, filed August 14, 1880, but dift'eringin its special construction, which hence constitutes the subject of my present application, as hereinafter set forth.

In the annexed drawings, Figure lgives a plan view of my improved machine, part thereof being shown in section, as is also the armature, which is represented in the act of being Wound with its first induction-coil. Fig. 2 is a side elevation, showing the winding machine in cross-section. Figs. 3 and 4 show details hereinafter described.

The core of the armature to be wound is indicated at a, and consists, as usual, of a coil of iron wire of oblong section, with rounded ends, as seen best in Fig. 1. Before winding this core with the copper coils the core is covered with a number of segmental blocks, 12 I), made in halves and clamped on the core, as fully illustrated in Figs. 1 and 2. These blocks correspond in number with the coils to be wound on the core, and when one of them is removed, as shown in Fig. 2, it exposes a segmental section of the core to admit of the winding thereon ofone of the coils of copper wire, so as to properly fill the segmental space. The armature while being thus wound is clamped on acurved bed or rest, 0, in the usual manner, (illustrated,) and as each coil is wound thereon the armature is loosened, turned round on its bed the space of one section, again clamped, the next block removed, and the next coil wound thereon, and so on successively till all the sections are wound. The wire to form each coil is first wound from each end equally on two bobbins or reels, and the middle part of this wire, between the bobbins, (see Figs. 1 and 2,) is placed against the middle of the exposed section of the armature-core, and the bobbins are then revolved around the same in opposite directions, so as to wrap the wire compactly thereon from each bobbin simultaneously, and onto and from the center of the section outward, and Vice versa, the winding being all, of course, on the same pitch, and the opposite ends being finally met and twisted together to connect with the commutator. This is the usual process of winding the armature as just described, the bobbins being revolved about the exposed section by hand, and it is this latter operation which my machine is designed to accomplish with more accuracy and rapidity.

In my former machine the bobbins were revolved by rigid circular rings revolving in opposite directions and passing through the armature-rin g, the exposed section of which projected within the rotary rings, so as to wrap the wire around the same in the manner already described. In my present machine I employ flexible or jointed endless bands or chains of oval continuity corresponding to the cross-section of the armaturecore, whereby the bobbins are revolved about the same in a path concentric with and parallel to the core of the armature, thus avoiding slack or eccentric points in the winding, which almost necessarily exists in the other case.

In the drawings, A A indicate the flexible endless bands or chains, which are mounted to freely run in grooves or ways on each side of the fixed frame B, the armature being so arranged that its exposed section to be wound is in the center or axis of the system, while the frame B passes through and the bands A A, with their attached bobbins,revolve through the armature-rin g and around the exposed section thereof, the motion of the bands being hence parallel to and concentric with the crosssection of the armature; hence no slack or eccentric points exist in the winding, and the as fully shown in tension or unwinding pull of the wire upon the bobbins is regular throughout the revolution. In the special case illustrated I prefer to form the endless bands as chains composed of broad, flat, or thin metal links, all joined together near their inner edge, as shown. The joint is a kind of rule-joint, the links being halved together at the joint and inclosing a beveled-edge roller, 0, free to turn on the connecting-stud f of the joint, as shown. The edges of these rollers project into a V-groove on the rim of the guiding-frame B, while an upright roller, g, near the outer end of each link, rolls on a ledge near the outer rim of the frame, so that each link of the chain is thus properly supported and guided by these anti-friction rollers, and the motion of the chain rendered smooth and easy, and at the same time the chain is prevented from rising out of place. The under or inner face of each link (see Fig. 4) is formed with rack-teeth, as seen best in Fig. 4., which teeth are engaged at one point of the chain by a pinion, h,revolving in a suitable bearing and cavity in the frame B and driven by suitable power, so that both chains become thereby rotated simultaneously and at equal speed in opposite directions. Now, each chain, of course, carries one of the bobbins having one length of wire wound equally thereon, as already described, and illustrated in Figs. 1 and 2, these bobbins being attached to each chain at diametricallyopposite positions and of a size and shape to readily pass through the armature-ring, as shown. The links on which the bobbins are mounted are each formed with a conical boss, in, which fits into a conical hub on the bobbins, and the bobbin is held in place thereon by a central screw, it, screwing into the boss, and by a broad washer, 0, between the head of the screw and the hub of the bobbin, which washer is prevented from turning by a pin, 19, passing through it into the boss, Figs. 1 and 2. The bobbin is thus not only accurately mounted on and connected with the chain, but by tightening the screw it the friction between the hub and the boss may be nicely regulated to put any desired tension on the unwinding wire, so as to efiect the winding thereof onto the armature with any desired degree of tautness, as will be readily understood.

I prefer to mount the frame B of the machine on a broad table-top by means of the posts 0, removably fixed on the table-top, the rest a for the armature being also fixed on the table, as seen best in Fig. 2. The frame and chain of the machine are, of course, so made that they may be divided and opened to admit the internal placement of that side of the armature being wound, as shown. The chain may, of course, be divided at any link by removingone of the joint-screws f, and the frame B is preferably divided on the center line, 00 00, as shown, the semicircular sectionbeing removable from the larger section, which latter is preferably fixed permanently to the tabletop. Hence, by detaching and removing the semicircular section and separating the chain at the line of division the machine may be easily opened to admit of the proper placement of the armature, as shown in Figs. 1 and 2, and may be again fastened together in a simple manner. Now, for winding armatures of greater or less width than that shown the machine maybe readily extended or contracted to correspond therewith. This may be done by providing a number of the removable sections for the frame of variable lengths, and the chain may, of course, be extended or contracted to correspond by removing or inserting links, so that the revolving chain will always be concentric with the cross-section of the armature, or practically so.

I prefer the special form of chain illustrated; but of course any other suitable form of chain may be employed, and even flexible bands of leather or rubber with the bobbins attached thereto in substantially the same manner may be employed without departing fIOIIl-tllfi prim ciple of my machine.

The action of the machine in effecting the accurate and rapid winding of each section of the armature may now be readily understood from what has been before stated and a con sideration of the drawings without requiring any further description.

I do not claim in this application the broad idea of using rings rotating through a ring armature in opposite directions for the purpose described, as this invention forms the subject ofa separate and previous application.

What I claim is- 1. A machine for winding electrical armatures of the kind described, constructed with a flexible or jointed endless band or chain, dis posed parallel or concentric with the cross-section of the armature, and arranged to revolve about the same, carrying a bobbin containing the wire to be wound thereon, substantially as herein set forth.

2. A machine for winding electrical armatures, consisting of two flexible or jointed endless bands or chains revolved in opposite di rections through the armature-ring and about the exposed section thereof in a path concentric with the crosssection of the armature core, or nearly so,and each carrying a bobbin containing the same length of wire, which becomes wrapped upon the armature-core, substantially as herein shown and described.

3. In a machine of the described kind, a chain of jointed links, one end of each link overlapping one end of the next adjoining link at the joint, and forming a recess inclosing a roller, substantially as and for the purpose specified.

4. In a machine of the kind described, two traveling chains moving in opposite directions, one above the other, and having their links formed withteeth for engaging with opposite sides of the same driving-pinion, substantially non-rotatin g washer o, substantially as and for as and for the purpose described. d the purpose set forth.

5. The combination, in a machine of the escribed kind, of a traveling endless band carry- JAMES BRADY 5 ing a bobbin free to turn thereon, a friction Witnesses:

seat or axis between said bobbin and chain, to- CHAS. M. HIGGINS, gether with the central adjusting-screw, n, and EDWARD H. WALES.

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