US277069A - Charles a - Google Patents

Description

No Model.) 0. A. SEELEY.

MAGNETO ELECTRIC MACHINE.

UNITED STATES PATENT OFFICE.

CHARLES A. SEELEY, OF NEW" YORK, ASSIGNOR TO JOHN HOOSIOK, N. Y.

1B. TIBBITS, OF

MAGNETO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 277,069, dated May. 8, 1883.

Application filed January 3, 1881.

To all whom it may concern Be it known that 1, CHARLES A. SEELEY, a citizen of the United States, residing at New York, in the county and State of New York,

,5 have invented a new and useful Improvement in Magneto-Electric Machines, of which the following is a specification.

In accordance with the invention herein described my improved magneto-electric ma- IO chine contains'no iron in its armature, and the parts of the machine are so combined that the electricity generated is similar in character to that of the Gramme machine. The machine belongs to the class which is sometimes designated as continuous-current machines.

In the accompanyingdrawings, in which similar letters indicate like parts, Figures 1 and 2 are end views of disk-armatures. Fig. 3 is a side view of the armature field-magnets and commutator as combined in the complete machine; and Fig. 4 is a view of part of an armature, showing a novel method of winding the bobbins.

, My improved machine, as to its form, its

2 5 principal parts and their relation to each other, and the theory of its operation, resembles the machines known as the Niaudet-Breguet machine and the Farmer-Wallace machine. In such machines the armature is of a disk form.

The electromagnetic elements, with axes parallel to each other and to the axis of revolu tiou, are arranged at the outer part of the disk, and the bobbins are connected together to form a closed series, the junctions of the bobbins being connected consecutively with the bars of the commutator.

The field-magnet system consists of two pairs of opposite magnet-poles, and its position with reference to the armature is illustrated in Fig.

.0 3, where S and N designate, respectively, the poles of the pairs. The magnet-poles should be provided with pole-plates conformable to the contour of the bobbins which are to be influenced by them. WVhen the armature is re- 4 5 volved between the opposed poles of the pairs of magnet-poles, electric currents areset up in the armature-circuit in such a way that a electrical consequent-pole is constantly maintained at the partof the circuit between one of the pairs of field-magnet poles, and a consequent-pole between the other pair, and

(No model.)

the brush-contacts of the commutatorare therefore to be made with the commutator-bars as they successively become connected with these consequent-poles.

My improvement in part consists in dispensing with the iron cores which heretofore have been employed in the armatures of the machines above described. The armature of my improved machine is a series of short bob- ()0 bins having no cores of iron, with axes parallel to the axes of revolution, connected outside toinside, and so on, so as to make a completelyolosed circuit, the series of bobbins being held together by suitable supports and stays. In 6 each of the drawings the position of the bobbins in relation to each other is shown. In Fig. l the connection of the junctions of bohbins with the commutator-plates is shown. The armatures are represented in the drawings as containingtwelve bobbins each; but in practice the number of bobbins may be greatly increased. It will be observed that when the wire is wound radially, as in Fig. 2, the proportion of the efficient to the inefficient wire 7 5 increases with the number of the bobbins 5 also, the evenness of current increases with the number of bobbins. A number less than twelve is not to be recommended. For a machine of large size one hundred would not be too many. 86

Figs. 1, 2, and 4 show different sectional forms of bobbins. In my armature only that part of the wire which may be computed as of a radial direction is directly efficient in the generation of electricity, and for this reason the 8 5 forms shown in Figs. 2 and 4 are greatly to be preferred to that shown in Fig. 1. The armature as shown in Fig. 2 differs from the armature patented by me June 22, 1880, in the fact that the bobbins of this specification are a 0 closed series, while the former armature had bobbins with free ends. The bobbins of Fig. 4 are wound 011 a novel plan, and will probably be preferred. In these bobbins the median lines of the winding are radial in part, and the angles of the radial parts between successive bobbins are equal to each other, and also equal to the angle of the radial parts formed by the in and out winding at the interior of the bobbins, and also equal to the angle of the sector of the disk occupied by each of the bobbins.

The word bobbin is used in this specification as synonymous with the word coil, and magnetic cores and connected in closed circuit, to to signify an electrical conductor Wound in a the said bobbins being so Wound and arranged constant direction about an axis. that all the angles formed by contiguous me- I claimdian lines of the winding shall be equal to each 1. An armature of a magneto-electric maother.

chine, in which coreless bobbins or bobbins CHARLES A. SEELEY.

having non-magnetic cores are connected in Witnesses:

closed circuit. E. GORDON,

2. A series of armature-bobbins Without] JAMES H. HUNTER.

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