US776304A - Electric-car truck. - Google Patents

Description

PATENTED NOV. 29, 1904.

W. DALTON.

ELECTRIC CAR TRUCK.

APPLICATION FILED SEPT. 20.1904.

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W. DALTON. ELECTRIC OAR TRUCK.

APILICATIOH FILED SEPT. 20,1904.

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PATENT WILLIAM DALTON, OF SOHENEOTADY, NEW YORK, ASSIGNOR TO AMERI- CAN LOOOMOTIVE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

ELECTRIC-CAR TRUCK- SPECIFIGATIQN forming part of Letters Patent N0. 776,304, dated November 29, 190d. Application filed September 20, 1904. Serial No. 225,231. (No model.)

To aZ w/wm it may concern:

Be it knownthat I, l/VILLIAM DALTON, of

Schenectady, in the county of Schenectady and State of New York, have invented a certain new and useful Improvement in Electric-Oar Tracks, of which improvement the following is a specification.

The object of my invention is to provide an electric motor truck in which the driving strains may be so transmitted from the transoms to the bolster that the bolster will be free to move between the transoms under all conditions without tendency to bind.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a plan or top view of an electric-car truck, illustrating an application of my invention; Fig. 2, a Vertical transverse central section through the same; and Fig. 3, a vertical longitudinal central section through the same,

with the center-casting removed.

My invention is herein illustrated as applied in connection with an electric-car truck having a rectangular frame 1, which is provided with jaws or pedestals of any suitable form for the reception of the journal-boxes 3,- in which the axles 2 rotate, the wheels 4 being secured upon the axles in the usual manner. Each axle is rotated by an electric motor 7, supported thereon and on the'frame through the intermediation of gearing inclosed in a case 7, the driving mechanism not being herein set forth in detail, as it does not in and of itself form any part of my present invention and may be of any known and preferred construction. 7

In the practice of my invention I provide a bolster which is supported on springs 5, seated on a spring-plank 6, which is hung on swing-hangers 8, pivoted on transoms 9, connecting the side members of the truck-frame 1. The bolster, which is fitted with the capacity of vertical movement between the transoms 9, is composed of a plate-metal body 10 of trough or U section and an inverted channel top plate 10, which is riveted to the sides of the body at its top.

The body of the bolster is dished or downwardly inclined from each of its ends to its middle portion, thereby presenting an .increase of depth and strength, decreasing the wear on the bearing-surfaces of the transoms, and enabling the bolster to move more easily between them. A center-casting 10 having a hole for the reception of a center-pin, is fixed upon the top plate 10" and side bearings 10 are fixed upon side-bearing castings 10, secured to the top plate near its ends.v

In motor-trucks of the ordinary construction having a center-pin above the bolster the strains on the center-pin due to the tractive effort of the motor tend to rack the bolster and cramp it between the transoms. In order to relieve the thrust upon the center-pin resultant upon the tractive effort, I provide thrust bearings 10 at each end of the bolster, which project above the center-pin and abut against bearing-faces ll on the corner-plates 11, which are fixed to the frame 1 opposite the ends of the bolster. The thrust-bearings 10 are preferably, as shown, formed integral with the side-bearing castings 10. The strains of the tractive effort are taken up by the thrustbearings and bearing-faces and by wearingplates 9, riveted to the middle portions of the inner sides of the transoms 9, against which the adjacent outer surfaces of the lower middle portion of the body of the bolster abut. It will be seen that under this construction the strains on the center-pin are relieved, and the transmission of strain from the transoins to the bolster is such that the bolster moves freely and without binding tendency between the transoms.

The application of braking force to the wheels 2 of the truck is effected when and as required by brake-shoes 12, which are suspended by hangers in the usual manner from the truck-frame 1 and are coupled to brakelevers 14, the lower ends of which on each side of the truck are connected by two-part or divided links 15, fitted with turnbuckles 16, by which the total length of the links may be adjusted, as it may from time to time become necessary.

I claim as my invention and desire to secure by Letters Patent 1. In an electric-car truck, the combination of a main frame, transoms connecting the side members thereof, a bolster fitted with the capacit-y of vertical movement between the transoms, vertical thrust-bearings fixed upon the top of the bolster adjacent to its ends and extending above the center -pin, and bearingfaces fixed on the frame opposite the thrustbearings. K

2. In an electric-car truck, the combination of a main frame, transoms connecting the side

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