US380702A - slater - Google Patents

Description

(NO Model.) a sheetssheet 1.

, H.BSLATER.

- DYNAMO.

No. 380,702'.v Patented Apr. 10, 1888.

WHJVESSESQ INVENTO'R' ttor-neg H.B.SLATER.

3 Sheets-Sheet 2.

DYNAMO.

(No Model.)

No. 380,702. Patented Apr. 10, 1888.Y

WITNE/SBES.

INVENTOR d @1/U LW 7 .dttrney N PETEIIS. mlwLnv-nmpner, www. D. C4

' PatentedApr. 10,1888.

"fld i 880W UNITED STATES PATENT OFFICE.

HENRY B. SLATER, OF DETROIT, MICHIGAN, ASSIGNOR TO THE DETROIT MOTOR COMPANY, OF SAME P LAOE.

DYNAMO.

SPECIFICATION forming part of Letters Patent No. 380,'2'02l dated April l0, 1888.

Application filed December 29, 1886. Serial No. 222.807. (No model.)

To all wiz/m) it may concern.-

Beit known that I, HENRY B'. SLATER, of Detroit, county of Wayne, State of Michigan, have invented a new and useful Improvement in Dynamos; and I declare the followingto be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form a part of this specification.

My invention consists of the combinations of devices and appliances hereinafter specified, and more particularly pointed out in the claims. In the drawings, Figure l represents a central section by a vertical .plane parallel with the shaft of a machine embodying my invention. Fig. 2 is a sectional View at right angles to the shaft. Fig. 3 is a plan view. Fig. 4 is a horizontal section through the shaft.

I desire it to be understood that in the use of the term dynamo-machines7 in this specification and claims it applies either to the dynamo when constructed as a generator or when constructed as a motor.

It is the purpose of my invention to produce a dynamo in which, instead of causing the helices of the armature to move past vthe pole piece or pieces which concentrate their infiuence at only one or two adjacent points upon each convolution as it passes by, the ieldmagnets are so arranged and their polepieces so adjusted that substantially the same influence is exerted at different points distributed throughout the whole length of cach convolution.

Another feature of my invention consists inl tributed at the corresponding points throughexterior polepiece by bolting` or, otherwise fastening them together, and so shaped with said contiguous pole-piece that they shall conform substantially to and closely embrace the exterior surfaces of the helices upon the armature.

In carrying out my invention, A is the shaft; B, any suitable supports for the shaft; C, any suitable commutator. y

I have not illustrated any particular form of 6o commutator, nor any particular form of construction whereby the bobbins or helices of the armature are connected with the commut-ator, for it will be understood that this invention is equally applicable to any ordinary construction of armature and commutator, and that any particular construction, so far as relates to the commutator or the winding of the armature, forms no part of the invention described and covered by this patent.

D is the armature.

E represents four field-magnets terminating -in pole-pieces F upon the outside of the armature-ring.

G represents two eld-magnets inside the armaturering and terminating in pole-pieces H. Directlyoppositethelatter,upontheotl1er side of the armature,are two similar field-magnets, G', terminating in pole-pieces H. The pole-pieces H and H are connected directly with the pole-pieces F by bolts or otherwise. They are so shaped adjacent to the helices or bobbins of the armature as to conform closely in shape thereto and so as closely to envelop the latter, thus constituting in effect a single pole-piece consisting of the parts F H H.

It is apparent, however, that by the arrangement of the field-magnets as above described the poles or centers of excitement are dis-` o out nearly the whole length of each convolu- 9 tion of wire upon the armature, so that instead of concentrating the action of the field-magnets at one or two points opposite each convolution, as is quite customary in the construction 9 5 of dynamos, the action is distributed by means of the several held-magnets with substantially equal effect at several points on each convolution.

I am aware that it is not new to construct 10o 1\ I W Y the pole-pieces of a field-magnet so that it shall substantially surround the bobbins or helices ofthe armature; but in such cases thereis but a single pole or excited center, and the exciting action is distributed about this center, and rapidly decreases as one recedes from the pole or center, so that while the action is intense at one point it is comparatively slight at the remote points of the pole-piece. So, also, I am aware that it is not new to locate a pole-piece within the armature-ring and to excite the same by independent field-magnets and with the interior pole-pieces connected with the exterior by plates; but in such construction the pole-pieces have not been made to conform closely with the exterior' surface of the bobbins or helices of the armature, nor have they been brought in upon opposite sides of the armature, so as to produce several poles or centers of excitement distributed substantially throughout the ent-ire length of the convolutions upon the bobbins or helices of the armature; and so, while the last construction named accomplishes in some degree abeneticial effect, the construction is notsuch in the device which I have described as to effect in a complete and satisfactory manner the purpose sought.

The armature D is in the form of a broad flat ring, so as to present a deep recess on the interior of the ring and upon each side of the spokes, so that the fieldmagnets G G may be brought well into the interior of thearmaturering. rIheir polepieces, while being kept close tothe extremities of the helices of the said well in close to the plane of the spokes.

I would have it understood that when the interior and exterior field-magnets are all parallel to each other they may be either parallel with the shaft or perpendicular thereto. I prefer, however, the latter construction.

It will be observed that in the construction illustrated in the drawings the Iieldmagnets are all arranged parallel with each other and in a direction perpendicular to the axis ofthe armature. This construction I believe to be economical and beneficial, sinccit brings into active operation directly upon the bobbins of the armature the opposite ends of the core of each field-magnet.

In a generator constructed according to my invention I believe that a given current can be produced with a smaller expenditure of power than by other forms of dynamos, and as a motor I believe it will deliver a greater percentage of the power required to drive a primary generator.

l. In a dynamo-machine, the combination, with an armature wound so as to present deep recesses upon both sides of the plane of its spokes, of field-magnets provided with polepieces arranged opposite the periphery of the armature-ring, outside of the latter, and independent field-magnets parallel to the former, provided with pole-pieces arranged opposite the periphery ofthe armature-ring, but inside the same, said interior pole-pieces connected with the adjacent exterior pole-pieces, substantially as and for the purposes described.

2. In a dynamo-machine, the combination, with an armature wound so as to present deep recesses upon both sides of the plane of its spokes, of field-magnets arranged at right angles to the shaft, and provided with polepieces located opposite the periphery of the armature-ring and outside the same, and in connection therewith independent held-magnets parallel with the former, having` pole-pieces located opposite the periphery of the armaturering, but within the same, and a corresponding set of independent field-magnets and polepieees located within the ring` on the opposite side of the plane of its spokes, the pole-pieces of said interior magnets connected with the adjacent polepicces of the exterior held-inagnets, substantially as and for the purposes described.

3. In a dynamo-machine, the combination, with an armature wound so as to present deep recesses on both sides ofthe plaire` of its spokes, of four ield'magnets arranged at right angles to the shaft, provided with common pole-pieces located opposite the periphery oi" the armatureriug, outside of the same, and in connection therewith two independent hield-magnets parallel with the former, provided with com mon polepieces opposite the periphery ofthe armature-ring and within the saine, and upon the opposite side of the plane of the spokes two other independent field-magnets parallel with the former, with common pole pieces similarly arranged, said interior pole-pieces connected with the adjacent exterior polepieces, substantially as and tor the purposes described.

In testimony whereof I sign this specification in the presence of two witnesses.

HENRY B. SLATER.

Vitnesses:

N. S. VRIGH'r, JOHN E. Winns.

IOC

Images