US363128A

US363128A - easton

Info

Publication number: US363128A
Authority: US
Publication date: 1887-05-17
Anticipated expiration: 1904-05-17

Description

(No Model.) 7 2 Sheets-Sheet 2.

J. W. 'EASTON.

DYNAMO ELEGTRIG MACHINE.

No. 368,128. 7 Patented May 17, 1887.

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UNITED STATES PATENT OEEIcE.

JAMES W. EASTON, OF NEW YORK, N. Y.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 363,128, dated May 17, 1887.

Application filed July 3, 1896.

To all whom, it may concern.-

Be it known that I, JAMES IV. EASTON, a subject of the Queen of Great Britain, residing in New York, in the county and State of New York, have invented certain new and useful ImprovementsinDynamo-ElectricGenerators, of which the following is a specification.

My invention relates to the construction and method of organizing dynamo-electric generators.

The objectof the invention is to so organize two or more dynamo-electric generators and their circuits that currents of different character may be derived therefrom, while the ma chine will be to a certain extent automatically regulating.

In carrying out the invention the neutral plate of one generator preferably serves as the neutral plate of the second. The field-magnet coils of two or more of the generators are connected in circuit with one of the armatures, and supplementary coils are employed upon the field-magnets of one or more ofthe generators as regulating-coils by including them in the circuit of another armature.

In the accompanying drawings, Figure 1 is a side elevation, partly in diagram, illustrating the construction of the machine and organiza tion of the circuits; and Fig. 2 illustrates a modification.

Referring to the figures,A represents a shaft, upon which there are carried, in this instance, two armatures, A and a. The armature A revolves in a field established by two polepieces, 13 and B, derived from the field-magnets C/ and 0 respectively. The field-magnets are connected by neutral plates D and I) in the usual manner. The armature is provided with a suitable commutator or collector, E, having brushes F and F. Conductors 1 and 2 lead from these brushes respectively through the coils G G and G G of the field-magnets; and in the circuit there is included a workcircuit, L, which, in thisinstanee, is represented as being employed for operating arc lights M M. From the neutral plate D there are derived field-magnets c 0, having pole-pieces b and I) applied to the armature a. Aportion, g g,.of the coils of these field-magnets are included in the circuit of the armature A in series with the coils G G and G G. In this manner the neutral plate D serves as a neutral Serial No. 207,041. (Nomodeld plate for both sets of field-magnets, and the main magnetizing effectfor the fieldunagnets b and b is occasioned by the currents from the armature A.

The armature a and its field-magnets are represented in this instance as being smaller than the armature A and its field-magnets; but the two may be of the same size. The armature A is represented as supplying eurren ts forthe arc lights, and the currentsrequired for this purpose are therefore constant in quantity. The armature a supplies currents for incandescent lighting, the lights m at being included in multiple are between conductors Z Z leading from the respective brushes f and f", applied to the commutator-or collector e of the armature a. The currents required for incandescent lighting are of constant electromotive force, or, in other words, the difference of potential between conductors Z and Z is rcquired to be constant. For this purpose the field of force applied tothe armature a should be to some extent automatically regulating. This is accomplished by including a section, 9 g", of the coils surrounding thefield-magnets b andb in the circuit of the armature a, as shown. In this manner variations in the current flowing through the translating-circuit Z Z will occasion variations in the strength of the field applied to the armature a and com pensate for the increasing and decreasing of the current in the armature-coils.

If desired, the arrangement'of circuits may be reversed, the magnetizing-coils of the fieldmagnets of the larger armature being included in the circuit of the smaller armature, and a portion sufficient to regulate the current from the larger. armature included in its circuit in series.

In Fig. 2 a method of winding isillust-rated, in which the currents from the armature ctare employed to excite thefield-magnets of the armature A, while the coils g g of the smaller field-magnets are included in the working-circ'uit of the armature A. In this manner the currents from the armature A will counteract their own disturbing effect by increasing or decreasing the field of the exciting-armature a,which in turn will vary the current through the coils G G and G G By this construction a less amount of wire is required in the circuit of the armature A to accomplish the same end as results from including the coils (t G and G2 G in the circuit of the armature A.

In the construction shown in Fig. 2 the arc lights are included in the circuit of the armature a,\vhieh is a constant-current circuit, and the ineamleseentlights are supplied by the constant potential currents from the armature A.

I claim as my invention-- 1. The combination, with two field-magnets and their respective armaturcs, the one organized to deliver currents constant in quantity, and the other to deliver currents of a constant electro-1notive force and variable quantity, of a circuit derived from thcarmatu re delivering currents of constant quantity ineludinga portion of the field-magnet coils of the other :11 mature, and a circuit derived from the lastnamed armature incl uding the remaining coils of its field-magnet.

2. The combination, substantially as hereinbeforc set forth, of two arniatures, one delivering currents constant in quantity and of variable clectro-motive force, and the other delivering currcntsofconstantelectro-rnotive force,

their respective fieldinagnets, magnetizingcoils applied to both of said field-magnets, a circuit derived from the first-nan1ed armature including all of its own field-magnet coils and a portion of the field-magnet coils of the other armature, and a circuit derived from the sec oud armature, including the remainder of its own field-magnet coils.

3. The combination of two arinatures, their respective ficld-1nagncts, a circuit derived from one of said armaturcs, including a portion of the field-magnet coils of the other armature, and a circuitdcrived l'ronithesecond armature including the remaining portion of said fieldnntgnet coils and all the tieldanngnct coils of the first-named armature.

In testimony \vhereot'l have hereunto subscribed my name this 25th day of Way, A. D. 1886.

JAMES \V. E:.\STON.

Vi tnesses:

Tnos. TRYO N, CHARLES A. TERRY.