US447704A - Egbert w - Google Patents

Description

(No Model.)

B. W. TRAYLOR.

ELECTRIC MOTOR.

No. 447,704. Patented Mar. 3,1891.

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UNITED STATES PATENT OFFICE.

ROBERT IV. TRAYLOR, OF RICHMOND, VIRGINIA, ASSIGNOR TO THE TRAYLOR ELECTRIC COMPANY, OF SAME PLACE.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 447,704, dated March 3, 1891.

Application tea a, 21, 1890.

To all whom it may concern:

Be it known that 1, ROBERT X TRAYLOR, a citizen of the United States, residing at Richmond, in the county of Henrieo and State of Virginia, have invented new and useful Improvements in Electric Motors, of which the following is a specification.

My invention relates to certain improvements in the construction of electrical motors, the purpose thereof being to provide a motor capable of running upon curves and elsewhere without injury, which shall be compact and durable and produce the maximum mechanical and magnetic effects.

It is also one purpose of my invention to provide a simple and economical construction and arrangement of parts whereby any field-magnet core may be renewed by simply removing a bolt and without the necessity of removing the entire motor from the car.

It is mypurpose, finally, to provide a fieldmagnet in which the several coils of wire are each wound upon a separate core. In certain motors the coils are overlaid or combined on one core, the consequence being thatif the bottom coil burns out theinclosing coils must be removed before the burned coil can be renewed, causing a considerable expenditure of time and labor. As already set forth, itis my object to avoid these objections and to provide a novel and simple construction whereby an equal amount of work is accomplished with a smaller quantity of current than has heretofore been possible by providing separate cores to produce higher magnetism in having wire wound closer.

To these ends my invention consists in the several novel features of construction and new combinations of parts hereinafter fully described, and then pointed out in the claims following this specification.

Referring to the accompanying drawings, Figure l is a partial plan view, showing a motor connected with a car and having my invention embodied therein. Fig. 2 is a transverse section upon the line a; m, Fig. 1.

In the said drawings, the reference n umeral l designates part of the frame of the motor, which is constructed substantially shown and supported by j ournal-boxcs 2 in the wellknown way.

erial No. 352,589 (No model) The numeral 3 denotes the yokes for the fieldmagnets and poles, which consist of plates forming the supports for the magnet and for the pole-pieces thereof. Between these yokes and the parallel projections r on the pole-pieces are interposed three cores 5, which are preferably arrangedinatriangular group or at the angles of a triangle. Each of these cores is supported by a bolt 6, passing through the core '7 of the magnet and through the yoke, as well as through the projection 4: parallel with the yoke upon the same side of the transverse center of the polepieces, nuts 8 being turned upon one or both ends of the said bolts. This arrangement of the cores gives a broad and firm base of support upon the yokes and upon the projections 4: parallel therewith, whereby a firm attachment is provided ofgreat strength, which will rigidly resist the wrenching and twisting of the frame as the car passes around curves.

Each of the cores 7 of the magnets is wound with one of the coils of the field-magnet. The armature-shaft 9 rotates in bearings 10, supported in or upon the yokes 3. The armature is provided with commutator-segments 12 of any desired construction, which make contact with brushes 13, supported by bearings 14:, mounted in or upon the yokes 3. The shaft 15 of the armature 9 is mounted at substantially equal distances from the four cores, which, as shown in Fig. 2, are mounted upon the ends of the parts 3 adjacent to the armature. Between the three cores nearest 8 the car-axle and through the pole a shaft '16 is inserted, its ends passing through the yokes 3 and carrying upon one end a gear 17, which meshes with a smaller pinion 18 upon the pro jecting end of the armature-shaft 15. Upon the other end of the intermediate shaft 16 is mounted a small pinion 19, which meshes with the gear 20 upon the axle of the car.

13y arranging the coils feeding the magnetic field in the manner described I not only provide a triple connection between the yokes and the parallel projections upon the ends of the shoes, but I also enable any repairs to be made to the magnets in the easiest, simplest,and most expeditiousmanner. Ialso I provide a motor which is capable of performing the samedegree of work witha materially less quantity of current. For example, in motors where all overlying coils are wound upon one and the same core about ten amperes are required in the lower coil to satu- 5 rate the core, while twenty amperes are needed for a third coil and fifteen or thereabout for the middle coil. In my invention, however, ten amperes for each coil or thereabout are sufficient for each of the coils, giving a higher percentage of induction with a less current.

It will be understood that these magnets feeding the field may be connected either in shunt or series winding.

.lVhat I'claim is- 1. In an electric motor, the combination, with the pole-pieces of the field-magnet, of cores arranged between the yokes and the parallel projections of the pole-pieces, each magnet being wound with a separate coil, and a counter-shaftextending between and parallel with the cores of said magnets, substantially as described.

2. In an electric motor, the combination, with the yokes and the parallel projections supporting the pole-pieces, of cores having a triangular arrangement between the said projections and the yokes and united thereto by bolts and nuts, whereby an extended base of support and attachment is afforded between said parts, substantiallyas described.

3. In an electric motor, the combination, with the pole-pieces of the field-magnet, havinglateralprojections and provided with yokes parallel therewith, of cores each carrying a 3 5 separate coil and each arranged between the said yokes and parallel projections, bolts passing through the cores of said magnet and pro ecting at their ends through the said yokes and projections, and nuts turned upon the said projecting ends, substantially as described.

4. In an electric motor, the combination, with the pole-pieces of a field-magnet, of three separate cores having their cores arranged upon each keeper at the apices of a triangle, each core being wound with a separate coil, an armature having its shaft arranged in substantial parallelism with and at equal distances from the cores of the four cores adjacent to the said armature, and a counter-shaft arranged between the three cores upon one side of said armature and provided with a pinion meshing with a gear on the car-axle and at the other end with a large gear meshing with a small pinion upon the shaft of the armature, substantially as described.

5. In an electric motor for cars and similar vehicles, the combination, with an armatureshaft, of pole-pieces having lateral projections, cores arranged in triangular groups of three upon each side of said armature, each core being wound with a separate coil and being secured between the lateral projections of the pole-pieces and yokes parallel there- I with by means of boltspassing through both and secured by nuts, and a counter-shaft parallel with and intermediate of the cores of one of the triangular groups of cores and carrying a gear and a pinion meshing, respectively, with a gear on the axle and a pinion on the armature-shat t, substantially as described.

6. In an electric motor, a field-magnet having its coils separated into groups of three, each wound on a separate core and having substantially triangular arrangement on 0p- 7 5 posite sides of the armature, the terminals of each coil being connected to the corresponding coil in the opposite group, and said circuits being connected in shuntor series, substantially as described.

In testimony whereof I have affixed my signature in presence of two Witnesses.

ROBERT IV. TRAYLOR.

Witnesses:

JAMES L. NORRIS, JAMES A. RUTHERFORD.

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