US247278A - vande poele - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1 0. J. VAN-DE POELE.

DYNAMO ELECTRIC MACHINE. No. 247,278. Petented Sept. 20,1881.

(No Model.) 2 Sheets-Sheet 2-.

O. J. VAN DE POELE.

DYNAMO ELECTRIC MACHINE.

No. 247,278. Patented Sept. 20,1881.

UNITED I STATES PATENT OFFICE.

CHARLES J. VAN DE POELE, OF CHICAGO, ILLINOIS.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 247,278, dated September 20, 1881.1

' Application filed May 25, 1881. (No model.)

To all whom it may concern:

Be it known that I, CHARLES J. VAN DE POELE, of Chicago, in the county of Cook and State of Illinois, have invented an Improvement in Dynamo-Electric Machines, of which the following is a specification.

My invention relates to new and useful improvements in the construction of electric generators, whereby a large number of independent currents of an alternating'character may be produced.

The invention consists in the peculiar construction of parts and their combinations, as more fully hereinafter described.

Figure 1 is a side elevation of my improved machine complete and ready for operation. Fig. 2 is a vertical central longitudinal section. Fig. 3 is a rear-end view, showing commutatorring and insulated brush and holder to send current through electro-magnet in case a second or separate dynamo-machine is employed to saturate said magnets. Fig. 4. is a front-end view, showing coils, brushes and holders, and commutator, by means of which the necessary currents are collected to keep up magnetism in large magnets, making the machine selflcontained-that is, not requiring a separate dynamo to keep up the currents in the revolving magnets. Fig. 5 is a cross-section, showing inducing-magnets, induced coils, ring to which the induced coils are secured, and the hub carrying the large electro-magnets, of which the hub forms a part.

In the accompanying drawings, which form a part of this specification, A A and B B represent the four large inducing-magnets, each being secured 'to the hub H, which is secured upon a shaft, I, journaled in suitable bearings, J, at each end, and driven by a belt upon the pulley K.

0 represents the armature-plates, around which are wound the wire-coils 0. These plates, carrying said coils, are secured to the rings D by means of screws a, as shown, so that the rings, with an even number of armature-coilssay two or any multiple of two-will form a circular chamber, within which the shaft carrying the magnets may revolve.

E are circular plates, of wood or other nonconducting substance, secured to the end of the armatures, covering the coils thereof, and carrying binding-posts L for the induced coils. There are two of these bindingposts for each one of the armature-coils.

M is the commutator.

N N are brush-holders and brushes, and in Fig. 4 the wire-connections are shown between two opposite coils of the armature and the brush-holders.

0 represents a commutator-rin g, and 0 an insulated brush-holder and brush, upon the rear end of the machine, designed to be employed in sending currents through the electromagnets in case a second or separate dynamo is used to saturate said magnets.

In practice it is well known that a large fieldmagnethavingonce been magnetizedwillretain asmall portion ofwhatis called remnant magnetism. Now, on revolving said magnets in frontofor along the sides of the cores and coils of thearmature,weak currents will be developed in said coils, but in alternate directions. By properly connecting said coils to the brush-holders and brushes N N, as shown in Fig. 4, said currents are made to run in one direction, as all the coils of the magnets are connected with the commutator M, one terminal with one half of the commutator and the other terminal with the other half of said commutator. The currents thus being sent in one direction through the large magnets, theirpower will beincreased and act more powerfully on the coils of the armature. These,intheirturn,willsendcurrents of corresponding strength into the large magnets, and so on, keeping up the required magnetism in said field-magnets as long as the machine is in operation. This explains how the apparatus is made to be self-sustained, requiring no special or separate source of electricity to saturate the revolving field.

It will be very easily understood that in all the independent coils currents of alternate directions will be generated as long as the field is revolving in connection with said coils O 0, Fig. 4, and that many combinations can be made with induced coils and currents, furnishin g currents of more or less power, as required.

On an examination it will be found that this machine is to a certain extent an inverse construction of the dynamo-machine as patented IOG to me on September 21, 1880, in patent numbered 232,574. The armature in said patented machine revolves, and the field is stationary, whereas in the present construction I revolve the field within the armature, which is sta tionary.

The machine herein described, in addition to keeping up its own magnetism, is capable of giving off a large number of independent circuits to be used for lighting or for other purposes. By making the revolving field so as to present only one positive (north) and one negative (south) pole I obtain one very powerful magnet, and, as it takes rather a long time to saturate any other electro-magnet in the vicinity of an inducing-magnet, by this system I give the induced coils the same time to acquire their saturation as in the case of the stationary field. This is not the case, however, where the inducing-magnets are numerous and small. Another advantage I gain, since the apparatus is se1f-contained,is that the commutator can be made in the simplest of the known forms.

WVhat I claim as my invention is- 1. In a dynamo'electric machine, and in combination with the rotary field-magnets A A B B thereof, the stationary and circular series of armature-magnets G, each composed of a core, 0, wound in the direction of its length and secured to two or more rings, D, surroundo ing all the magnets, said armature-cores having their narrow edges adjoining each other, substantially as and for the purpose specified.

2. In a dynamo-electric machine, the fieldmagnets A A B B, each consisting of a long fiat core attached radially to the revolving shaft 1 in the direction of its greatest length, and provided with a curved polar face projecting past the core in all directions, in combination withthestationary armatureanagnetsOO, both the armature and the field magnets being wound with wire in the direction oftheir length, substantially as and for the purpose specified.

3. In a dynamo-electric machine, and in combination with the stationary armature-cores G thereof, the circular flanged insulating-rings E and binding-posts L, said rings being constructed to protect the ends of the armaturecoils and to sustain the binding-posts ot' the coils, substantially as set forth.

CHARLES J. VAN DE IOELE. Witnesses:

JOHN ScULLY, ALLEN A. GRIFFITH, Jr.

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