US1390449A

US1390449A - Car-truck construction

Info

Publication number: US1390449A
Application number: US464113A
Authority: US
Inventors: John A Lamont
Original assignee: American Steel Foundries
Current assignee: American Steel Foundries
Priority date: 1921-04-25
Filing date: 1921-04-25
Publication date: 1921-09-13
Anticipated expiration: 1938-09-13

Description

J. A. LAMONT.

CAR TRUCK CONSTRUCTION. APPLICATION H150 :APR. 25, I921.

Patented Sept. 13,1921.

. To all whom it may concern:

UNITED STATES PATENT OFFICE.

JOHN A. LAMONT, or CHICAGO, ILLINOIS, ASSIGNOR 'ro AMERICAN scrEEE FOUND- .RIES, or CHICAGO, ILLINOIS, AGORPORA'IION OF NEW JERSEY.

CARwTR-UCK CONSTRUCTION.

Be it known that I, JOHN A. LAMONT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Car-Truck Construction, of which the following is a specification.

This invention relates to a car truck construction and more particularly to a sixwheel equalizing truck.

One object of the invention is to provide a simple arrangement of parts for making a railway .car easier riding.

Another object is to provide a simple and improved spring arrangement for car trucks whereby the dead and live loads are taken in a manner to cushion all shocks and prevent the springs going solid.

These and other objects are accomplished by means of the arrangement disclosed on the accompanying sheet of drawings in which the single figure is a fragmentary side elevation of a six-wheel truck embodying my invention.

The various novel features of the invention will be apparent from the following description and drawin and will be particularly pointed out in t e appended claims.

Referring to the drawing it will be noted that my invention is disclosed in' connection with a six-wheel truck having a side frame 10 provided with two end pockets 11, only one of which is shown, for the reception of a journal box 12 and an intermediate pocket (not shown) for an intermediate journal box. The general six-wheel truck arrangement is disclosed in my copending application, Serial No. 433,412, filed December 27, 1920.

In this connection it will be appreciated that the loads are transmitted from the transverse bolster members 13 which rest upon the associated equalizing levers 14 which transmit the loads to the intermediate journal box and to the end journal boxes 12. The

outer end of each equalizing lever in this particular case is shown operatively connected to a hanger 15, pivotally supported on the pin 16, mounted between the side walls of the side frame 10, longitudinal movement of the equalizing mechanism thereby being permitted to prevent shocks being transmitted thereto. The shocks which occur incident to starting and stopping of the car are taken Specification of Letters Patent.

1921. Serial No. 464,113. a. i

by the transverse bolster members 13 and the side walls 17 of the bolster pockets 18.

The journal box 12 has a main. body portion for the reception of a journal 19 and is Patented Sept. 13,1921.

also provided with laterally extending brackets 20 upon which are mounted concern, trically arranged coil springs 21 and 22.

These coil springs are partially housed by side flanges 23 which extend from the opposite sides of the journal box to. and over the intermediate journal receiving portion thereby also giving strength to the box. For

strengthening purposes the brackets 20 are also connected by a flange 24 extending below the main body portion of the journal box. The coil springs 21 and 22 are also recelved in depending sprin pockets 25 formed integrally with the side frame, the

inner walls 26 of said pockets forming guides for! guiding the journal box 12 in its relative vertical movements. I

In passenger car service, the coil springs 21 and 22 are designed to take the dead load of the car under the weight of which these springs will set about half way between the free and solid height. In such service, substantially all of the load is dead load. However, the live load must be considered for the purpose of making the riding of the coach as smooth as possible. To this end I have provided an'ellipticspring 27 to cooperate with the coil springs, the elliptic spring being slower inaction and having better riding qualities than the coil spring- The elliptic spring in the arran ement which will .be more specifically described hereinbelow will act as a snubber-on the coil springs, when the through anopening 30 in the side frame.

From the construction shown it is apparent that any relative movement between the side frame and journal'box will cause an actuation of the coil springs and elliptic springs, which at all times cooperate.

As stated above in passenger car service the live load is small in proportion to the weight of the car body, and in this service the coil springs 21 and 22 are provided which under the weight of the car body are set about half way between the free and solid height of the springs. The elliptic springs will then be adjusted to bear on the top of the journal box with a. certain initial set and carrying a certain percentage of the live load. The addition of extra spring capacity arranged in the manner described, provides an arrangement whereby the coil springs take the required compression under dead load and the elliptic spring, Which is of slower action and different in riding qualities than the coilspring, will act in a manner to absorb oscillations which otherwise would be set up and result in the springs going solid and causing shocks to be transmitted to the car body. The amount of initial set in the elliptic spring may be adjusted in any suitable manner. In the particular arrangement shown the attachment is provided by means of shims 31.

It is my intention to cover all modifications'of the invention falling within the spirit and scope of the following claims.

I claim: v

1. In a railway car truck, the combination of a side frame, a journal box, coiled springs interposed between said side frame and jour nal box for absorbing the dead load, and an elliptic spring interposed between said side frame and journal box for absorbing a portion of the live load and preventing shocks being transmitted to the car body when operating on an uneven track, said coiled and elliptic springs at all times working cooperatively.

2. In a railway car truck, the combination of a side frame, a journal box having laterally extending brackets, coiled springs mounted on said brackets and, interposed between the latter and said side frame for absorbing the dead load, and an elliptic spring interposed between said side frame and journal box for absorbing a portion of the live load and preventing shocks being transmitted to the car body in operating on an uneven track, said coiled and elliptic springs arranged to act cooperatively.

3. In a railway car truck, the combination of a side frame, a journal box having laterally extending brackets, co'iled springs mounted on said brackets and interposed between the latter and said side frame for absorbing the dead load, and an elliptic spring mounted on an intermediate portion of the journal box and interposed between the latter and the side frame for absorbing a portion of the live load and preventing shocks being transmitted to the car body in operating on an uneven track. I

4. In .a railway car truck, the combination of a side frame, a journal box having laterally extending brackets and a platform extending upwardly from the main body por tion of the journal box, relatively quick acting springs interposed between the said brackets and saidside frame, and a rela tively slow acting spring mounted on said.

platform and interposed between the latter and said side frame, whereby the dead and live loads are absorbed and shocks are prevented from being transmitted to the car body. I

5. In a railway car truck, the combination of a side frame having depending spring pockets and an opening'intermediate same, a journal box having a main journal receiving portion, laterally extending brackets I JQHN A. LAMONT.