US442173A - Charles e - Google Patents

Description

(No Modl.) I

G. E. DRESSLER. ELEGTRIG MOTOR 0R DYNAMO ELECTRIC MAGHINE.

N0..442,173. Patented Dec. 9, 1890.

I Wh tman aw v UNITED STATES.

PATENT OFFICE.

CHARLES E. DRESSLER, OF NEWV YORK, N. Y.

ELECTRIC MOTOR OR DYNAMO-ELE CTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 442,173, dated December 9, 1890.

Application filed April 14, 1890. Serial No. 347,91'7- (No model.)

To all? whom it may concern.-

13 c it known that 1, CHARLES E. DRESSLER,

of'the city of New York, in the county and State of New York, have invented a new and useful Electric Motor or Dynamo -Electric Machine, which invention is fully set forth and illustrated in the following specification and accompanying drawings.

The object of this invention is sufficiently indicated in its title above given.

The invention will first be described in detail, and then particularly set forth in the claims.

In the accompanying drawings, Figure 1 shows the machine in cross-section at right angles to its axis of rotation. Fig. 2 shows the machine in sectional elevation, with the armature withdrawn from between the outer and inner field-magnets.

In saidfigures the several parts are indicated by reference letters and numbers as follows:

An outer magnetic field is obtained by the annular arrangement of four pole-pieces 1, forming quadrantal sections of a stationary cylinder tied together through one diameter at the field-coils 2 and at the other diameter by straps or bars 3, of nonmagnetic material. An inner magnetic field is obtained by four quadrantal'pole-pieces 4, formed of two fixed semi-cylinders provided with coils 5. Ahollow cylinder-armature 6, provided with coils c, is annularly interposed to rotate between said inner and outer magnetic fields.

The parts marked with the letters N and S have north and south polarity correspond ing, respectively, with that indicated by said initial letters.

The pole-pieces l are spaced apart to 1'e ceive the coils 2 by means of the field-cores 7, of magnetic material, into which cores are tapped the bolts 8 through the pole-pieces. Bolts 9, through the straps 3, are tapped into the polepieces 1, so that the outer field-magnets are thoroughly secured together and may be secured in any suitable manner to any suitable foundation or bed-plate. The

semi-cylindrical inner pole-pieces 4c are con nected together in pairs by cores 10, which cores may be integral with their respective pole-pieces, a suflicient zone of space being allowed to be filled'with the coils 5, excepting a central space for the driving or armature shaft 11, whose connection with the armature and the armature itself will presently be described. The inner fieldpole-pieces 4 are suitably secured by bolts 12 or otherwise to the flange 13 of a sleeve 14, which sleeve is immovably secured by set-screws 15 or otherwise in a pillow-block or bearing-block 16, which latter may be secured in any suitable manner to thebed-plate of the machine.

The armature 6 is composed of a series of annular disks a, preferably bolted together, so as to form'a hollow cylinder, by bolts 11, -passing through holes 6, and by the same bolts or otherwise to a disk (1, of non-magnetic material, secured fast to the driving or armature shaft 11. Said shaft is journaled at one end in the sleeve 14 and at its other end in a suitable bearing 17, secured to the bed-plate of the machine. The commutator O is secured in any suitable manner to the shaft 11, either directly or to the disk (1, as may be preferred. The armature-coils c are wound radially and longitudinally of the armature through holes h in any number desired or best suited to the size of the machine. Said coils may be made of iron wire insulated such as cotton or silk-and besides being cheaper than if of either copper or brass wire they form part of the whole mass of the ar mature to be attracted by the field, while at the same time serving as the energizing or exciting media for said whole mass. These coils of iron wire will be effective in the machine if it be used as a dynamo, but are of more advantage when the machine is used as a motor. It is obvious that these coils and the bolts b 1n ntually act to re-enforce each other in securing the laminae or disks a together; but the bolts may be omitted, if desired, the coils having strength enough in themselves to hold the laminae together independently of said bolts. The coils of the field-magnets are to be connected in the usual well known man ner to a dynamo, battery, or other suitable primary source of electricity and the arma ture coils to the same or a similar electric source and to the commutator in a manner well known to those skilled in the art, and therefore not needing explanation here.

This machine only needs to be run by by any suitable or usual insulating material-- IOC power to become a dynamo or generator of electricity instead of a transmitter of power or motor.

It will be observed that in the field-magnets the poles of like polarity are brought into very close proximity, and as they mutually repel each other the tendency is to concentrate a greater attractive force at their opposite poles or unlike poles, which increased attractive force adds to the economic performance, whether the machine be used as a motor to drive the armature or as a dynamo to generate electricity by the forcible driving of the armature by external power. The 0011- struction of the armature is such that it is obvious that the quantity of wire used therefor may be indefinitely increased without soparating any of the pole-pieces farther apart. Coarser wire can also be used for this purpose than that commonly used heretofore, thus lessening danger of burning tl16lI1Slllated covering of the wires or the wires themselves.

Having thus fully described my said invention, I claim- 1. In an electric motor ordynamoanaehine, in combination with an outer armature, a fieldmagnet within the same composed of cylindrical sectors of like polarity connected to sectors of opposite polarity by cores wound with exciting-coils of insulated wire within a zone separating said sectors, substantially as and for the purposes set forth.

2. In an electric motor or dynamoanachinc, the combination of outer and inner field-magnets annular-1y located and an interposed armature, the outer field-1nagnet composed of cylindrical arcs connected in pairs, as poles ofopposite polarity, by end cores wound with exciting-coils of insulated wire,sai d pairs being intermediately divided to form adjacent poles of similar polarity, and the inner field magnet composed of cylindrical sectors of like polarity connected to sectors of opposite polarity by cores wound with exciting-coils of insulated wire within a zone separating said sectors, substantially as and for the purposes set forth.

3. In an electric motor or dynamomaehine, the combination of outer and inner field-magnets annularlylocated and an interposed openended arl'nature, the inner field-magnet scoured to a sleeve mounted on a pillow-block or standard and serving as a bearing for tho armature-jou rnal, substantially as and for the purposes set forth.

In an electric motor or d Yljltll10-l11l0l1lll, an annular armature composed of a scries of annular disks secured together by bolts and provided with coils of insulated wire wound in longitudinal slots radially in line on the same side of the center of the ar1.nature,substantially as and for the purposes set forth.

5. In an electric motor or dynamo-machine, a series of annular disks of iron magnetically insulated from each other and secured together by bolts, so as to form an'annular armature-core, and provided with exciting-coils of insulated wire longitudinally wound through slotsin said disks in radial lines on the same side of the center of the armature, substantially as and for the purposes set forth.

(5. In an electric motoror dynamomachinc, in combination with outer and inner fieldmagnets annular] y located, a series of annular disks secured together so as to form an interposed annular armature-core by coils of insulated wire longitudinally wound through slots in said disks in radial lines between the outer and inner fieldanagnets, substantially as and for the purposes set forth.

CHARLES E. DRESSLIiJi'i. Witnesses:

FRANCIS P. REILLY, THEO. ll. FRIEND.

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