US1551835A - Electric locomotive - Google Patents

Description

Sept. 1, 1925. I 1,551,835

. E. C. MORGAN ELECTRIC LOCOMOTIVE Filed Jan. 26, 1921 2 $hee'cs$hcet 1 5 'Zgvwewfoz Sept. 1, i925 1 835 E. c. MORGAN ELECTRIC LOCOIIOTIVE' Filed Jan. 26, 1921 I 2 shun-sheet, 2

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UNITED STATES PATENT OFFICE.

EDMUND C. IIIORGAN, OF NEW YORK, N. "L; OLIVE MIORGAN ADIMINISTRATBIX OF SAID EDMUND C. MORGAN, DECEASED.

ELECTRIC LOCOIVIO TIVE.

Application filed January To all whom it may concern.

Be it known that I, EDMUND C. NtonoAN, a citizen of the United States, residing at New York city, in the county of New York and State of NmvYork, have invented a new and useful Electric Locomotive, of which the following is a specification.

My invention relates to improvements in electric locomotives in which an armature of an electric motor employed to propel the locomotive is mounted to encircle an axle of a pair of driving wheels to revolve in unison therewith and resiliently connected thereto to drive the same or be driven thereby. The objects of the improvement are to increase the efficiency of such locomotives throughout a wide range of speeds; to reduce the unsprunq' weight to a low percentage of the total weight; to provide high insulating resistance between the motor, or motors if more than one is employed, and the other parts of the mechanism; to economize space and to increase the durability by lessening shocks. Other objects will appear in the description.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the locomotive truck, partly in section, and Figure 2 an end elevation partly in section. The

three sections shown in Fig. 1, are taken on Fig. 2, as follows: The part between the center of the axle9 and the longitudinal center of the locomotive; the part between the longitudinal center of the locomotive and the axle 10 and the part to the right of the axle 10 respectively at 1, 1; 1 1 and 1 1 Fig. 2, looking in the direction indicated by the arrows. The two sections shown in Fig. 2, are taken as follows: The part to the right of the lateral center and the part to the left of the lateral center respectively at 2, 2 and 2 2*, Fig. 1, looking in the direction inclicated by the arrows. Figure 3 is an enlarged sectional end view of a portion of the armature sleeve and the spiderFigs. 1 and 2, showing my preferred form of connection and insulation between them. Fig. 1 is a sectional view of Fig. 3 taken on line 4, 4t, looking in the direction indicated by the arrows. Fig. 5 is a sectional view on a reduced scale taken on line 5, 5, Fig. 3, looking in the direction indicated by the arrows showing construction of the parts shown in as, 1921. Serial No. 440,184.

Figs. 3 and 4 for the full length of the armature sleeve and spider.

Similar reference signs refer to similar parts throughout the several views.

Locomotives embodying my invention may be constructed having one or more pairs of driving wheels. As herein shown the locomotive is provided with two pairs of driving wheels. 7

Referring to Figs. 1 and 2, the main frame 6 is provided with journal boxes 7 and leafsprings 8, of usual construction. Carried in the journal boxes are the axles 9 and 10 having driving wheels 11. Mounted on the axles 9 and 10 are the motors 12. As these motors with their mountings in the main frame 6 and their connections to the axles 9 and 10 are the same, I have placed the same reference signs on the same parts of each. I will describe one which will answer for both.

The main frame of the motor is composed of two box-like frames 13 and 11-, preferably made of aluminum or some metal that will radiate heat rapidly, this being assisted by ribs such as 15. The lower frame 13 is bolted to the upper frame 14 along a hori zontal plane containing the longitudinal axis of the axle by means of the long bolts 16, two at each side of the motor frame on opposite sides of an axle, and by short bolts 16 at each end. The motor frame 12 has at each side provision for receiving the bearings for the armature 18.

The motor is of the eight pole type, having four pole pieces 19, two of which are detachably secured to the lower part 13 and two detachably secured to the upper part lt of the field frame 12, and so spaced as to form eight pole faces about equidistant apart around an armature.

The pole pieces 19 are of novel construction and are provided with exciting coils of novel form. The form of the polepieces permits of an armature being used that in diameter is nearly equal to the height of the motor frame and the form of the exciting coils permits of a short motor frame and also provides a large radiating surface for the coils. The pole pieces are built up of thin soft plates 20 and thick metal end plates 21, Fig.2 held together by heavy bolts 22 and bolt 23 Fig. 1. The end plates 21 have lugs 24 and25 by which they are. se

ing bushings 17which constitute the bearcured to the frames 13 and 1% by means of cap screws shown in Fig. 2. The exciting coils 26 each form a triangle in outside outline or section in side view as in Fig. 1.

The armature 18 of the motor in the form of a ring is composed of the usual well known discs, end plates for the discs, comn'iutator, windings, etc. mounted on a metal ring 27 to each end of which are secured end plates 28 each having a projection 29 the outside of which forms a bearing in the bushings 17.

On the axle over which the motor is mounted is a spider 30 secured to the axle by means of keys, said spider having an outside diameter more than one-third the outside diameter of the armature. The periphery of this spider faces the inside surface of the ring 27 of the armature. Secured to the periphery of the spider is a ring of insulation 31, and secured to the inside surface of the armature ring is a ring of insulation 32. Between the two insulation sur faces are placed coil springs formed in rows legthwise of the spider and around the same so as to approximately fill the space between the periphery of the spider and the inside of the ring 27. The ends of the springs are emoedded in the insulation.

The motor frame 12 is spring supported on the main frame 6 so that all of the weight of the motor or any portion desired may be carried by the main frame. In case itwas practically all carried by the main fran'ie the main oflice of the springs 33 would be to transmit the motion of the armature to the axle and form a guide for the motor. I will now describe this suspension for the motor on the main frame.

At the four upper cornersof the motor frame 12 are secured the brackets 34 by means of bolts. Heavy insulation is interposed in the f'astenings to electrically insulate the brackets from the motor. Pivotally connected to the brackets 34; are the links 35 extending upwardly and pivotally connected to the ends of the arms 36 which are mounted on and secured rigidly to the shafts 37 which are rotatably mounted in the long frames 38 extending across the locomotive and secured to the sides of the main frame (3 by bolts. Pivotally connected to the ends of the arms 36, on the same center that the upper ends of the links are pivoted, are the eye bolts 89, the outer ends of which are slidingly mounted in the blocks 40 that are pivotally mounted in the long frames 38. he eye bolts 39 are threaded for nuts 41, and thick washers 12 are provided. Between the washers 42 and the blocks 40 are mounted around the eye bolts 39 the helical compression springs 4:3. It will be seen by the peculiar arrangen'ient of the arms 86, the links and the spring actuated eyebolts 39, that practically a constant upwardly pulling force will be applied to the motor frame through a considerable range of vertical movement of the main frame of the locomotive by reason of the variation in leverages. It will also be seen that by adjusting the springs at one side of the motor to apply a different tension from the tension of the springs at the other side of the motor, the difference in weight of the two sides of the motor can be con'ipensated for so as to maintain it parallel with the axle.

In order to permit the motor to have vertical movement with respect to the main frame of the locomotive and at the same time prevent it from revolving around the axle, I have provided guiding means consisting of flanged brackets 41-4, two at each side of the motor located near the top and two at each side of the motor located near the bottom. cecured to the main fran'ic (5 and electrically insulated therefrom are the brackets 4-5, the end of one of each extending to the flanged face of one of the lower bracke s ir l. Secured to the ends of arms 1:6, which extend from the long frames and electrically insulated therefrom, are the flat metal bars 16, the end of one of each ex tending to the flanged face of one of the upper brackets ll. Enough clearance is left between the ends of the brackets l6, and the flanged faces of the brackets 44 to obtain a sliding fit.

Considerable clearance is left at all points between the motor and the other parts of the locomotive so that with the insulation described the motor is completely insulated electrically. This particularly desirable where a high tension initial current such as 3000 volts, for instance, is supplied to the locomotive and then divided between several motors by connecting say four of them to operate pern'ianently in series so that the tension of any one is only 750 volts. Vith my invention the motor windings need only be insulated for the lower pressure while an additional insulation is provided for the higher pressure across the line.

Referring to Figs. 3, l and 5 which illustrate my preferred form of connection between the arma'ture sleeve and the spider, 17 is the armature sleeve and 48 the spider, corresponding respectively to the armature sleeve 27 and the spider 30 shown in Figs. 1 and 2. The insulating medium consists of a cylindrical shaped piece 1-9 of uniform thickness throughout, made of n'iica or othe high electrical and h at resisting qualities and compression strength. Long strips 50, of metal or fiber are provided which are straight on their outer surfaces lengtlnvise but curved laterally to correspond to the curvature of the inside surface of the insulation i?) and tapered from each end on the inside flat surface so as to be thicker at the center, and of the proper width and in sufficient number to cover the entire inner surface of the insulation l9 except for the small spaces between them when pressed out tightly against the insulation. These strips 50 arecurved laterally on t ieir tapered faces to fit the curved tapered faces of the two cylindrical metal rings 51, which are provided with a number of holes running lengthwise through them and spaced evenly around their circumference. These holes receive the bolts 52, which serve to pull the two rings 51 together and wedge the parts 47, 49, 5O tightly together.

The rings 51 are provided with ribs 53 extending around their inside surfaces and between the ribs and outside of the two outer ribs springs 54: are secured to the rings 51, extending in rows circumferentially and longitudinally, corresponding to the arrangement of the springs 33 Figs. 1 and 2. The spider 48 is provided with longitudinal slots to receive the lugs 55, one of which is secured to the free end of each of the springs 54. Rings 56 are bolted to each end of the spider 48 to hold the lugs 55 in place. This serves through the springs 54 to hold the armature in place laterallywith respect to the spider except for a cushioned movement permitted by the give of the springs.

By means of my invention I provide large spaces for the connectionsbetween the armatures and the axles, and for those spaces I have provided insulating medium and resilient driving means of such strength as to have a large factor of safety for transmitting the motionof powerful armatures to the axles, and to secure the great durability so necessary for such apparatus.

Having described my invention, I claim:

1. In an electric locomotive, an axle, driv- I ing wheels mounted on the axle, a main frame yieldingly mounted on the axle for vertical movement with respect thereto, an electric motor adapted to be mounted with 1ts revolving drivlng part encircling the axle, means carried by the main frame havmg compensating means connected to the motor to support it on said mam frame so as to maintain the said revolving driving part in approximately fixed relation to the axle throughout the vertical movement of the main frame on the axle, and resilient driving connections between the revolving driving part of the motor and the axle.

2. In an electric locomotive, a main frame yieldingly supported on an axle of a pair of driving wheels to have vertical movement with respect thereto, an electric motor adapted to be carried by the main frame and to drive the axle through resilient driving connections, and two independently acting yielding supporting means of different supporting strength mounted on the main frame and connected to the motor to support the motor in an approximately fixed relation to the axle irrespective of the vertical movement of the main frame.

3. In an electric locomotive, a main frame yieldingly supported for vertical movement on an axle havin a pair of driving wheels, an electric; :otor for driving the axle, resilient drivin means connecting the motor and axle, and means for supporting the motor on the main frame to permit vertical movement between them while maintaining the motor in an approximately fixed relation to the axle; said means consisting of a plurality of devices, each device including an arm pivoted in the main frame with its free end extending upwardly at an angle, a bar having pivotal connection with the free end of the arm and extending downwardly to pivotal connection at its lower end with the electric motor, a rod pivoted at one end to the free end of the arm and extending in a horizontal position in a direction away from the pivot of the arm in the main frame, a sliding support for the free end of the rod pivoted in the main frame, a collar on the rod adjustable along the rod by means of a thread and nut on the rod, and a compression spring on the rod between the collar and the pivoted support.

4:. In an electric locomotive, a main frame yieldingly supported for vertical movement on an axle having a pair of driving wheels, an electric motor for driving the axle, resilient driving means connecting the motor and axle, and means for supportin the motor on the main frame to permit vertical movement between them while maintaining the motor in an approximately fixed relation to the axle; said means comprising two supplemental frames, spaced apart, mounted on the main frame and extending over the motor, two horizontal shafts mounted on the supplemental frames one at each side of the motor and parallel to the length of the motor, each shaft having connected to it one at each end, mechanism consisting of an arm mounted on the shaft with its free end extending upwardly. at an angle, a bar having a pivotal connection with the free end of the arm and extending downwardly to a pivotal connection on a bracket secured to the motor, a rod pivoted at one end to the free end :of the arm and extending in ahorizontal position in a direction away from the horizontal shaft, a sliding support for the free end of the rod pivoted in the supplemental frame, a collar on the rod adjustable along the rod by means of a thread and nut on the rod, and a compression spring on the rod between the collar and the pivotal support.

5. In an electric locomotive, a main frame yielding-1y supported for vertical movement on an axle of a pair of driving wheels, a motor consisting of a frame and a revolving driving part for driving the axle mounted with the revolving driving part encircling the axle, resilient connecting means between the revolving driving part of the motor and the axle, supporting means for the motor on the main frame adapted to permit vertical movement of the main frame with respect to the motor, and vertical sliding guiding means between the main frame and the frame of the motor to prevent the frame of the motor from revolving while permitting the vertical movement of the main frame.

6. In an electric locomotive, an axle, driving wheels for the axle, a spider having a rim mounted on and secured to the axle, an electric motor for driving the axle having an armature mounted on a sleeve arranged to encircle the spider, and helical springs for transmitting the motion of the armature sleeve to the spider mounted between the inside surface of the sleeve and the face of the spider, each with one of its ends connected to the sleeve and its other end connected to the spider.

7. In an electric locomotive, an axle, driving wheels for the axle, a spider having a rim mounted on the axle and secured thereto to drive it, an electric motor for driving the axle havin an armature mounted on a sleeve arranged to encircle the spider, insulation around the inner surface of the sleeve, rings inclosed within the circle of insulation and provided with wedging devices to lock the rings, insulation and armature sleeve together, and springs for transmitting the motion of the armature with the said locked together parts to the spider and axle mounted between the inner surface of the rings and the face of the rim of the spider, each with one of its ends secured to the inner surface of the rings and its other end secured to the rim of the spider.

8. In an electric locomotive, an axle, a spider carried by said axle, and an armature mounted to encircle said spider and carried by resilientmeans on the periphery of said spider, said resilient means also serving to transmit the motion of the armature to the spider.

9. In an electric locomotive, an axle, driving wheels on said axle, a spider carried by said axle for carrying and transmitting the motion of an armatiilre, resilient driving means between said armature and said spider, said spider having an outside diameter of more than one third of the outside diameter of said armature.

10. In an electric locomotive, an axle, a spider carried by said axle, an armature including a sleeve of approximately the same length as the spider mounted to encircle the spider, spaced therefrom, and a resilient medium for transmitting the motion of the armature to the spider occupying approximately all the space between the periphery of the spider and the inside surface of the sleeve.

11. In an electric locomotive, a main frame, two driving wheels spaced apart having bearings in said frame, a barrel like member extending approximately through the space between the said driving wheels and rigidly secured thereto, an armature for imparting motion to said drivin wheels mounted to encircle said barrel like member, and a resilient medium occupying approximately the entire peripheral face of said barrel like member to support said armature and transmit the motion of said armature to said driving wheels.

12. In an electric locomotive, a driving axle, an armature mounted to encircle said axle and including a sleeve, end plates secured to said sleeve for closing the ends thereof and resilient means forming the sole means for transmitting the motion of the armature to the axle said resilient means being enclosed between said end plates.

13. In an electric locomotive, a driving axle, an armature including a sleeve mount-- ed to encircle the axle, and a resilient electrical insulating medium extending circumferentially around the inner face of said sleeve and inclosed between the ends thereof, the said electrical insulating medium forming the sole means of transmitting the motion of the arniature to the axle.

1%. In an electric locomotive, a driving axle, an armature including a sleeve mounted to encircle the axle, and a series of helical springs having endwise bearing on the inner surface of the sleeve and spaced lengthwise and circun'iferentially of the inner surface of the sleeve to form a motion transmitting means between the armature and the axle.

15. In an electric locomotive, a driving axle, an armature including a sleeve mounted to encircle the axle, and a series of radially extending springs having longitudinally spaced bearings on the inner surface of the sleeve extending approximately the length of the sleeve and spaced circumferentially to form a motion transmitting means between the armature and the axle.

16. In an electric locomotive, a main frame, a driving axle having bearings in said main frame, an armature mounted to encircle said axle, resilient means contained between the ends of said armature and having connection to said armature and said axle to form motion transl'nitting means between said armature and said axle, and a field frame for said armature having bearings to guide it in fixed relation to said armature.

17. In an electric locomotive, a main frame, a driving axle having bearings in said main frame, an armature mounted to encircle said axle, resilient means contained between the ends of said armature and having connection to said armature and said axle to form motion transmitting means between the armature and driving axle, a field frame for said armature having bearings to guide it in fixed relation to said armature, and yielding suspension means between said main frame and said field frame,

18. In an electric locomotive, the combination with an axle, of driving wheels thereon, a main frame yieldingly mounted on said axle for vertical movement rela tively thereto, an electric motor comprising a rotating part encircling the axle, means yieldingly connected between the main frame and said electric motor for compensating for variation of weight of end portions thereof to maintain the same parallel to the axle, and resilient driving connections between the revolving parts of the motor and the axle.

19. In an electric locomotive, the combination with an axle, of traction wheels thereon, a drum on said axle, an electric motor concentric with said axle and encircling the same, and a multiplicity of resilient driving connections distributively connected between the cylindrical surface of said drum and said electric motor.

20. In an electric locomotive, the combination with a driving axle, of an electric motor armature mounted to encircle said axle and comprising a cylindrical sleeve, a spider drum on said axle and within said sleeve but spaced therefrom, and a multi plicity of springs connected between said drum and said sleeve by being distributed over the surface of said drum.

21. In an electric locomotive, the combination with a driving axle, of an electric motor armature comprising a cylindrical sleeve mounted to encircle said axle, and a multiplicity of radial springs connected between said axle and said sleeve by being distributed over the inner cylindrical surface of said sleeve to form a resilient power transmitting means between said armature and said axle.

22, In an electric locomotive, the combination with an axle, of wheels thereon, a main frame resiliently mounted on said axle, an electric motor having a frame pivotally connected to said frame, a drum on said axle, a cylindrical sleeve connected to the armature of the motor and mounted concentrically with said axle but spaced from said drum, a multiplicity of springs distributively connected between said drum and said sleeve, and yielding means co-acting with the pivotal connections between said motor and main frame for maintaining the motor parallel to said axle.

In an electric locomotive, an axle, two axle boxes one mounted at each end of said axle, a frame rigidly connected to the axle boxes to move therewith, driving wheels mounted on said axle between said axle boxes, and an electric motor mounted around said axle between said driving wheels having its revolving driving part secured to said axle and its stationary part secured to said frame.

24;. In an electric locomotive, an axle, two axle boxes one mounted at each end of said axle, a frame rigidly connected to the axle boxes to move therewith, driving wheels mounted. on said axle between said axle boxes, and an electricmotor mounted around said axle between said driving wheels having its revolving driving part secured to said axle and its stationary part secured to said frame, the means for securing said stationary part to said frame being adjustable to vary the distance between the stationary part and the frame.

EDMUND o. MORGAN.

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