US502020A - Electric locomotive - Google Patents

Description

(No Model.) 1 2 sn000s- 011000 2.l y E. A. SPE-REY.

ELECTRIC LOGOMOTIYE. l No. 502,020. f Patented'J1'11-y20'1003;

UNITED Q STATES PATENT OFFICE.

ELMER A. SPERRY, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE SPERRY ELECTRIC RAILWAY COMPANY, OF CLEVELAND, OHIO.

ELECTRIC LOCOMOTIVE.

SPECIFICATION forming part of Letters Patent No. 502,020, dated July 25, 1893.

Application tiled October 23, 1891. Serial No. 409,583. (No model.)

To all whom it may concern.-

Be it known that I, ELMER A. SPERRY, a citizen of the United States, residing at Chicago, in the county of Cook and State of lilinois, have invented certain new and useful Improvements in Dynamos and Motors, of which the following is a specification.

My invention relates to the construction of electric machines, more especially to electric motors, and it consists in certain details of construction of the armature journal, mounting of the armature, construction of the body, or field magnet frame, support of the field coil and mounting, especially when adapted as a street car motor. illustrated in the accompanying drawings, in which- Figure 1 is a side elevation, partly in section. Fig. 2 is a View at right angles to-Fig. 1, showing axle in Yfore-ground. Fig. 3 shows section-of armature core with wire band. Fig.-

4 is a detail. Figs. 5 and 6 show different ways ofy making bands upon the armature. Fig'. 7 shows the alternate form of ldevice to secure a parallel movement.

Like letters of reference indicate similarl parts throughout the several views.

A indicatesa U-shaped iron forging or casting, preferably the former. A illustrates a similar portion covering the top of the U, presenting the pole piece A downward therefrom. The pole-piece B is supported .by the U-shaped part A. The coil` of the field magnet is wound on and supported between the pole piece A and cap A and is indicated by B'.

B is a hollow armature shaft supplied with 5o iron wires E, preferably in more than one layer. I have adopted two means of winding These inventions are thiswire, first illustrated in Fig. 5 in which all the wires are insulated, the exterior circle representing the insulation, the other in Fig. 6 where .each alternate wire is insulated the others being bare, shown at E. In-this case it is preferable, though not necessary, to make the bare wire of about the same size as the exterior of the insulation of the covered wire E. In this case, also, a septum of insulation is placed between the two layers of wires, indicated at E. The extremities of the stationary mandrel C are supported in brackets F,which may be either integral with the casing A or bolted thereto, both forms being shown in Fig. 2, the bolted form being shown in Fig. 1. Upon the armature shaft B is mounted the pinion F', which is organized to engage the gear F,which is mounted upon the axle G. In the case of Figs. 1 and'2 this axle is the car axle G driving the car wheel. A journal G encircles the shaft G and is carried in a segmental slot H of peculiar shape, the medial line of which forms the portion of the circumferenoe of a circle around the center of the mandrel C The slot is longer than the journal G which fits the slot only on its two lateral curved surfaces. Shruds are provided at H which guide the j ournal longitudinally and hold it within the slot. H H represent two elastic substances, or springs, one above and one below the journal and between it and the end of the slot. The two journals G are coupled so as to move simultaneously and in the same direction. Fig. 2 illustrates one method of accomplishing this result consisting of the segmental rack I formed upon vthe two journals adapted to co-operate with the pinions l which are mounted upon the auxiliary axle I in housings J, fastened to the part A of the motor. Fig. 7 illustrates an alternate form to accomplish the same result. Two segmental racks J co-operate with two levers J J fulcrumedon the motor frame at K K and attached to the journalsG at point K. L illustrates the commutator of the motor or dynamo as the case may be and L indicates the shield which is fastened to the lower part of the body. A springL supports the machine at a point opposite the axle G, there being one both above and below the projection of the motor indicated by M. The

housings M containing the slot I-I are made preferably removable for obvious reasons. The dotted line at N indicates the height to which the shield rises.

The use and operation of my device are as follows: An electric machine, consists of a rigid frame-work combined with a more oi' less large quantity of copper wire which is cov ered with cotton thread used for insulation and should not be subjected in whole or part to severe or sudden shocks or concussive blows. To avoid this action I mount the machine solely by elastic supports so `that it will not partake of the vibration of such supports. lVhen power is transmitted to or from a inachine so supported, by such a device, for instance as a spur gear, it becomes necessary to keep the elements absolutely in alignment for the proper working of such gearing. It*

will readily be understood that to preserve suchalignment the change of position with` in the slots II of the journals G should be equal and simultaneous. racks I, piiiions I and axle I, are for the purpose of preserving such parallelism of- Wherebiit one field coil as B' is used itlbef comes necessary to reduce the magnetic re-` luctance of the whole magnetic circuit to a minimum. This I accomplish by presenting to the polar surface the projecting teeth ris` ing from the armature core and furthermore reducing so far as possible the reluctance of the air gap exterior thereto by filling the same with bands of iron wire which are insulated to prevent the generation of currents therein, and are made small and morethan one layer is used.

It is preferable to use for a journal which is in such close proximity to the electrical parts of the armature as that shown at C, one which requires no liquid lubrication. The non-metallic sleeve C accomplishes this result and does away with the necessity of any liquid lubrication.

To prevent dust from having free access to the end of the sleeve C I have provided a dust collar which consists in acap N, spring O and collar made of the same substance as the sleeve C, all of which is `illustrated in Fig. a.

It will be observed that the stationar 7axes C being rigidly secured to each of the brackets F form together with them aform of truss,

thereby strengthening the frame supporting the armature.

Another very essential feature will be noticed in the shortness of the machine, the

The segmental To remove the armature it is i journals being interior to the armature. The boss upon the lower end. of the brackets D need be only about one-third the dimension along the axis that would be required were they replaced by journals.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is l 1. In an electric machine the stationary axle, a rotating hollow armature shaft combined with a non-metallic sleeve between the two forming a journal bearing therefor.

2. In an electric machine, the stationary axle, a rotating hollow armature shaft combined with a non-metallic sleeve mounted within and rotating with the armature shaft forming a bearing therefor.

3. In an electric machine, the stationary axle, a rotating hollow armature shaft combined with a non-metallic sleeve between the two forming a journal bearing therefor and brackets for supporting the axle exteriorto each end of the armature shaft.

4. In an electric machine, the stationary axle, a rotating hollow armature shaft combined with a non-metallic sleeve between the two forming a journal bearingtherefor,brackets for supporting the axle and dust collars applied to the ends of the armature shaft.v

5. In an electric machine,tlie stationary axle, a rotating hollow armature shaft Scombined with a nonmetallic sleeve between` the two forming a journal bearing therefor,"brack- `etstor supporting the axle and dust collars applied to theends of the armature shaft consisting in part of a collar of non-metallic lubricating material similar in substance tothe sleeve and requiring no liquid lubrication.`

6. In an electric `machine,whichis mounted solely upon elastic supports, power transmitting gearing connected with the rotating portion thereof in combination `with a device or devices independent of such gearing adapted to confine the alignmeutof the axcsof the gearing to parallelism in at least one plane.

7. In an electric machine which is "mounted solelyupon elastic supports, powerrtransmitting gearing requiringaligninent of axes for successful operation connected with the rotating portion thereof, in combination `witha device or devices independent of such gearing adapted to confine the alignment of the axes of the gearing to parallelism in atleast one plane.

S. In an electric machine mounted elastieally upon an axle, journals upon the axle adapted to move up or down in guides upon the machine, a parallel motion coniiectionbetween such journals arranged to synchronize their motion in such guides,a gear upon such axle and a co-operating gear mounted upon the rotating part of the machine.

9. In an electric machine mounted elastically upon an axle, journals upon the axle working in guides upon the machine, a segmental rack upon each journal `cooperating with pinions secured to a shaft extending ing onel pole piece and a cap for the U confrom one journal to the other, the shaft being mounted upon the machine.

l0. In an electric machine having but one 5 field magnet coil, a U-shaped forging forming one pole piece and a cap for the U consisting of a casting having the other pole-piece depending therefrom and provided also with brackets integral therewith supporting the 1o armature journal.

11. In an electric machine having but one field magnet coil, a U-shaped forging formsisting of a casting having the other pole-piece depending therefrom and provided also W1th I5 brackets integral therewith supporting the armature journal and a single field coil Wound and supported between the pole-piece and the cap.

ELMER A. SPERRY.

Witnesses:

J. B. MCGIRR, v

(1E.` HUNT.

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