US769920A - Dynamo-mounting for railway-car trucks. - Google Patents

Description

No. 769,920- PATENTED SEPT. 13, 1904. W. F. RICHARDS.

DYNAMO MOUNTING FOR RAILWAY GAB. TRUCKS.

APPLICATION FILED NOV. 2. 1903.

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APPLIUATION FILED NOV. 2, 1903.

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Patented September 13, 1904.

UNITED STATES PATENT OEEIcE.

WILLARD F. RICHARDS, OF BUFFALO, NET/V YORK, ASSIGNOR TO CHARLES M. GOULD, OF NEWV YORK, N. Y.

DYNAMO-MOUNTING FOR RAILWAY-CAR TRUCKS.

SPECIFICATION forming part of Letters Patent No. 769,920, dated September 13, 1904.

Application filed November 2, 1903. Serial No. 179,480. (No model.)

To all whom it may concern:

Be it known that I, WILLARD F. RICHARDS, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Dynamo-Mountings for Railway-Car.

Trucks, of which the following is a specification.

This invention relates to the mountings or supports for electric dynamos which are carried by the trucks of railway-cars and driven by one of the car-axles for supplying the carlighting system or for other purposes. These dynamos are usually driven by a chain, belt, or the like running around pulleys on one of the car-axles and the dynomo armature-shaft. As there is often considerable horizontal play of the journals in the truck on account of the looseness of the journals in their boxes and the boxes in the truck-pedestal guides, the truck-frame is shifted relative to the journals when the brakes are applied, so far in some instances as to snap or stretch the driving chain or belt unless the dynamo is capable of yielding under such strain on the drive chain or belt to relieve the latter.

The object of the present invention is to provide a strong, practical, and desirable mounting for the dynamo which can be readily applied to the ordinary truck-frame without altering the latter and which will hold the dynamo practically rigid or stationary, except when it is necessary for the dynamo to yield to prevent injury to the drive chain or belt, as above indicated.

In the accompanying drawings, consisting of two sheets, Figure l is a plan view of a portion of a truck provided with a dynamo mounted in accordance with the invention. Fig. 2 is a longitudinal vertical sectional elevation thereof in line 2 2, Fig. 1. Fig. 3 is a horizontal section, partly in plan, through the cushion device for the dynamo.

Like letters of reference refer to like parts in the several figures.

The truck-frame is of well-known construculated electrically and does not have to be shifted toward and from the car-axle to tighten and loosen the drive belt or chain to vary the speed of the dynamo. It is therefore desirable to support the dynamo so that it will remain practically stationary or rigid except when the brakes are applied, as above mentioned, or when the car is suddenly started and stopped, rendering it desirable for the dynamo to yield slightly to overcome its inertia or momentum.

F F represent two similar parallel supporting bars or brackets for the dynamo. Each bar has a horizontal longitudinal portion which passes over and rests'on the end beam (4 of the truck and extends therefrom to the transverse intermediate beam 7/, and a vertical leg f, which depends below and in front of or outside of the end beam. The supporting bar or bracket is secured to the end beam of the truck by vertical and horizontal boltsf f or in any other suitable manner, and the inner end of the horizontal portion of the bar preferably has an offset horizontal foot f, which underlies the intermediate truck-beam and is secured thereto by a vertical bolt f". The inner end of the supporting-bar could be secured to the intermediate truck-beam in any other suitable manner; but the described manner is desirable, as it enables the bar to be secured to the beam without removing or chang ingthe position of any of the parts of the truck. The lower ends of the vertical legs of the supporting-bars are preferably inclinedoutwardly and provided with loops or eyes through which and through one or more lugs g on the lower portion of the dynamo-frame passesa horizontal pivot bolt or pin G. The supporting-bars are strengthened and stiffened by inclined braces H, which are bolted or otherwise secured at their lower ends to the inclined portions of the legs of the supporting-bars and extend upwardly under the end beam of the truck, the upper ends thereof being bolted or otherwise secured to the horizontal portions of the supporting-bars.

The cushion device for retaining the dynamo stationary in its normal position and permitting it to yield, as before explained, is constructed as follows: I represents two cylindrical spring-pockets which are formed on or secured to a plate t', fixed on the end beam at of the truck by the vertical securing-bolts f for the dynamo-supporting bars. The outer ends of the spring-pockets are open and their inner ends closed. K represents plunger-rods the outer ends of which are pivoted between upwardly-projecting lugs is on the dynamoframe by a transverse bolt or pin The plunger-rods extend through the spring-pockets, the inner ends of which are provided with holes for the rods, and carry plungers L, which slide in the spring-pockets. The plungers are held against outward movement and are adjustable on the plunger-rods by nuts Z, screwed on the plunger-rods, which are screw-threaded. M represents coil-springs which are confined in the spring-pockets, between the inner ends thereof and the movable plungers L, which are preferably made hollow to receive the springs. The plunger-rods are provided outside of the inner ends of the spring-pockets with adjustable stop-nuts m, which bear against the inner ends of the spring-pockets to hold the dynamo from outward movement or movement away from the car-axle, and with lock-nuts m for the stop-nuts. The dynamo can be adjusted toward or from the car-axle to properly tension the drive belt or chain by adjusting the plungers and stop-nuts on the plunger-rods, and the tension of the springs M can also be regulated as found necessary by adjusting the plungers and stop-nuts toward and from each other on the plungerrods. The springs are preferably tensioned sufficiently to hold the dynamo from movement toward the car-axle under the pullthe center of gravity of the dynamo, so that the latter tends to swing downwardly, thereby holding the stop-nuts on the inner ends of the plunger-rods against the ends of the stationary spring-pockets. The springs also tend to force the dynamo away from the driving-axle and hold the stop-nuts against the inner ends of the spring-pockets, so that the dynamo is held practically rigid or stationary except that it can yield toward the drivingaxle, as explained, to relieve the drive belt or chain from undue strain.

I claimas my invention 1. The combination of a truck-frame having transverse beams, supporting-brackets for a dynamo each having a horizontal portion passing over one of said frame-beams and secured to the other beam, and a leg which depends vertically beside and is secured'to said firstmentioned frame-beam, braces connecting the lower ends of said depending legs and said horizontal portions of the brackets and passing beneath said first-mentioned beam, a dynamo arranged beside said legs, pivotal connections between said depending legs and the adjacent portion of the lower part of the dynamo, and means for normally holding said dynamo from pivotal movement, substantially as set forth. v

2. The combination of a car-axle, a dynamo movably supported, drive connections between the dynamo and the car-axle, and means acting to normally hold said dynamo stationary and which positively holds the dynamo from movement away from the car-axle but permits a movement of the dynamo toward the caraxle, substantially as set forth.

, 3. The combination of a car-truck, and axle, a dynamo, a pivotal support for the dynamo located to one side of the center of gravity of the dynamo, a drive connection between the dynamo and said axle, a positive stop for limiting the movement of the dynamo away from said axle, and a yielding connection between the dynamo and the truck to permit the movement of the dynamo toward said axle, substantially as set forth.

4:. The combination of a truck-frame, a dynamo, a pivotal support for the dynamo located below and to one side of the center of gravity of the dynamo, plunger-rods connected to the upper portion of said dynamo, stationary spring-pockets through which said plunger-rods extend, springs arranged in said pockets, plungers secured to said plunger-rods and bearing against said springs, and parts secured to said plunger rods and bearing against said stationary spring-pockets to hold the dynamo from movement in one direction, substantially as set forth.

5. The combination of a truck-frame, a dynamo, a pivotal support for the dynamo located below and to one side of the center of gravity of the dynamo, stationary springplunger-rods and bearing against the ends of pockets secured to said truck-frame, plungersaid spring-pockets, substantially as set forth. IO rods pivoted to the upper portion of said dy- Witness my hand this 24th day of October, narn'o and passing through said spring-pock- 1903.

ets, plungers adjustably connected to said WILLARD F. RICHARDS. plunger-rods and Working in said spring-pock- Witnesses:

ets, springs between said plungers and the fans. W. PARKER,

l ends of said spring-pockets, and nuts on said i C. M. BENTLEY.

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