US408754A - Motor for street-cars - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

W. S. SALISBURY. MOTOR E 'ORSTRBET CARS.

No. 408,754. Patented Aug. 1.3, 1889..4

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MOTOR POR STREET GARS. I No. 408,754. f Patented-Aug. 13, 1889.

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2O connecting 'the same with the axle, whereby .To all whom, it may concern:

` UNITED STATES wILBER s. sALIsBUEY,

PATENT OFFICE.

or crudi-ico, ILLINOIS.

MOTOR FOR STREET-CARS.v

SPECIFICATION forming part of Letters Patent No. 408,754, dated August 13, 1889.

Application filed March 1, 1889. Serial No. 301,710. (No model.)

Be it known that I, WILBER S. SALISBURY, citizen of the United States, and a'resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Motors for Street-Cars, described and claimed in the following speciflcatiom This invention relates to improvements in electric motors for street-cars, but is especially intended as an improvement upon the invention set forth in United States Letters Patent No.394a015, granted me December 4, 1888, in which was shown a frame balanced upon the car-axle and constituting a support for electric motors geared with and driving the axle.

The prime object of this invent-ion is to provide a new and novel arrangement of motors upon the balanced frame and the gears motors of greater speed and power may be employed without detracting from the compactness of the mechanism or destroying the balance of the frame upon the axle.

Another object is to have the frame of such construction that the motors willV have a yielding, support vand movement independent of the frameand its yielding connection with the car-superstructure, whereby the power of the motors will more nearly simulate the action of draft-animals than with the yielding connection alone and the strain of starting and stopping the car will be better distributed. Y

A further object is to provide an anti-friction bearing for the frame upon the axle of peculiar construction, which will not be affected by the end thrusts of the frame,

v'whereby the wear of the latter upon its bearing will be reduced to the minimum.

These objects are obtained by the devices villustrated in the accompanying drawings,

in which*- Figure 1 represents a half-plan-and halfsectional view of a portion of a car-axle, showing a frame and motors applied thereto embodying my invention; Fig. 2, a side elevation thereof, showing parts of the casingframe broken away; Fig.' 3, an enlarged horizontal section through the casing-frame; Fig.

4, an enlarged section on the line 5 5 of Fig. 3, more clearly showing the arrangement of the anti-friction devices; Fig. 5, one of the bearing-plates or segments of the anti-friction device, and Fig. 6 one of the anti-friction cylinders.

Similar letters of reference indicate the same parts in the several igures of the drawings. p

Referring by letter to the accompanying drawings, A indicates the axle, and B a frame composed of two sections bolted together and journaled upon the hub B of a large gear- Wheel C, for which the frame constitutes a casing or covering. Between this frame and the hubs ofthe gear-Wheel, which is elongated or extended at each side of the wheel, is an anti-friction bearing, consisting of a series of segmental bearing-plates D, which, when inserted into the hub of the frame, form a ring, each of said sections or plates being held in position by screw-bolts E, working through the frame-hub and furnishing a ready means of adjustment for the plates to take up the wearA on the bearing-surfaces thereof or of the anti-friction rollers F, two or more of which work between each plate and the hub of the gear-wheel. Each of these rollers is provided with a contracted portion G at the center of length thereof adapted to fit in corresponding recesses H in the inner faces o'f the bearing-plates, the said recesses being of just sufficient diameter to permit the free rotation of the rollers therein, so that the main bodies of the rollers lie at each side of the said bearing-plates,land are thus prevented from having any endwise movement upon the hub of the gear-wheel, which latter, as before described, is keyed upon the axle. The frame or casing B is in turn prevented from endwise movement by means of removable sectional end caps or plates I, bolted to the hub thereof, which cover the spaces in which theanti-friction rollers work and bear against the hub of the gear-wheel at each end in such manner as to eifectually prevent an endwise movement of the frame independent of the gear-wheel.

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rllhe bearing-surfaces of the gear-wheel hub t `are protected by hardened steel sleeves J,

' binding of the parts, also enables the ready compensation for wear between the parts, the removal of worn and substitution of new parts without interference with the rest, and withal furnishes a durable and commercial structure capable of being partially or wholly dctached from the axle with a minimum expenditure of time and labor. This frame, as in the said prior patent, is balanced on the axle and limited and opposed in its oscillations by powerful coiled springs K, attached at their ends, respectively, to the frame at the center above the gear-wheel and extending in opposite directions therefrom, with their opposite ends attached to the ear-frame or superstructure. These springs are supplemented by supporting-springs L, attached at their ends, respectively, to the frame at each side of the axle, their opposite end being connected by a guy-rope M, working over pulleys N, secured to the car-superstructure, which springs serve in a measure to relieve the car-r axle of the direct weight of the'frame or casing and the parts supported thereby, while permitting a free oscillation of frame on the axle. Instead, however, of the electric motors O being mounted directly upon the frame, as in. my aforesaid patent, they are supported upon supplemental frames P, one at each side of the axle, and having a pivotal or hingelike connection with said frame through the. medium of the bearing-eyes Q thereof, through which work counter-shafts R, loosely journaled in said frame and having gear-wheels S T mounted on each end thereof, both of the former meshing with the axle gear-wheel C, and the latter meshing, respectively, with the gear-wheels U on the armature-shafts V of the electric motors. Suchaconstruetion permits of a vertical movement of the supplemental frames, carrying with them the electric motors independent of the main supporting or casing frame, this movement, however, being in a curved line struck on the are of a circle from the axes of the counter-shafts R, so that the operation of the driving-gears will be in no wise aifected thereby. The weight of these supplemental frames and the parts carried thereby is indirectly supported upon the casing-frame by coil-sprin gs a b, sleeved upon bars c, depending from the supplemental frames, between which and brackets d, screwed to the main frame, the springs a are confined, while the springs I) are confined between the under side of said brackets and screw-washers or equivalent devices on the lower ends of the bars c, all of which springs yieldingly oppose a movement of the supplemental independent of the main frames, but gat the same time permit sufficient movement to compensate for any slight irregularity or difference in the speed of the motors and serve to render the action of the motors more nearly like that of draft-animals.

The construction of the motors to be cmployed in connection with this invention is immaterial, because if the opposing motors are alike they will necessarily produce an cxact balance of the frame upon the axle, and the only feature to be observed is that the field-magnets, spools, and armatures of the motors are supported upon the supplemental frames.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a motor for street-cars, the combination, with the axle and a gear-wheel mounted thereon, of a easing-frame journaled on said axle, a supplemental frame yieldingly supported upon said easing-frame, an electric motor mounted on said supplemental frame, and a gear-connection between said motor and the axle gear-wheel, substantially as described.

2. In a motor for street-cars, the combination, with the axle and a gear-wheel mounted thereon, of abalanced casing-frame journaled on said axle, a pair of supplemental frames pivotally connected with said casing-frame at each side of the axle, a yielding connection between said frames, electric motors mounted on said frames, and gear-connection between both of said motors and the axle gear-wheel, substantially as described.

3. In a motor for street-cars, the combination,with the axle and a gear-wheel mounted thereon, of a easing-frame j ournaled upon the axle, a counter-shaft j ournaled in said frame, a supplemental frame journaled upon said shaft, an electric motor mounted upon said frame, a gear-connection between said motor and shaft and between said shaft and the axle gearavheel, and a yielding connection between said supplemental and casing frames, substantially as described.

4. In a motor for street-cars, the combination, with the axle and a gear-wheel mounted thereon, of a casing-frame journaled upon the axle, a counter-shaft journaled in said frame, a supplemental frame journaled upon said shaft, an electric motor mounted upon said frame, a gear-connection between said shaft and motor and between said shaft and the axle gear-wheel, a bracket projecting from the casing-frame, a depending bar from the supplemental frame working through said bracket, and coiled springs sleeved on said bar and confined between the supplemental frame and said bracket on the upper side thereof and between a washer on the end of said bar and the bracket on the under side thereof, substantially as described.

5. In a motor for street-cars, the combination, with the axle, a gear-wheel mounted thereon, a casing-frame balanced upon the axle, and yielding cushions connecting said frame with the car-superstructure and directly opposing the oscillation of said casing IOO ITO

on the axle, of supplemental frames yield.-v

ingly supported'upon said easing-frame, electric motors mounted 011 said supplemental frames, gear-connections between said motors and the axle gear-wheel, and a yielding connection between said supplemental and casing frames, substantially as described.

6. In a motor for street-cars, the combination, with the axle, a gear-wheel mounted thereon, a casing-frame journaled upon said axle, and coil-springs attached at their ends,

respectively, to said frame and the car-super-v structure, extendingV in lopposite directions from said frame, of supplemental frames piv-V otally connected with the casing-frame, electric motors mounted on said supplemental frames, gear-connections between said motors and the axle gear-wheel, and yielding connection between said supplemental and casing frames, substantially as described.

7. In a motor for street-cars, the combina-l tion, With the axle, a gear-Wheel mounted thereon having elongated hubs, and a casing frame balanced on said axle constituting a support for electric motors operating said wheel, of anti-friction rollers bearing on said hubs, having contracted portions, and a bearin g-ring provided with recesses for reception of said contracted portions of the rollers in terposed between said rollers and the bearing-walls of the casing-frame, substantially as described.

8. In a motor for street-cars, the combinaing a support for electric motors operating said wheel, of anti-friction rollers, removable bearing-sleeves on the hubs of said gear- Wheel on which the rollers bear, said rollers having contracted central portions, and adjustable segmental bearing-plates provided with recesses on the inner facesl thereof in which said contracted portions of the rollers bear, said plates being interposed between the rollers and the bearing-walls of the casing-frame, substantially as described.

-This speciiication signed and witnessed this 21st day of February, 1889.

WILBER S. SALISBURY.

Witnesses:

ALBERT H. ADAMS, FRANK S. BLANCHARD.

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