US549763A

US549763A - Trustees

Info

Publication number: US549763A
Authority: US
Publication date: 1895-11-12
Anticipated expiration: 1912-11-12

Description

(No Model.)

R WN- STREET OAR EQUALIZER. No. 549,763. Patented Nov; 12,1895.

:INDREW EGRAHAM. PHm-UTHQWASBINETON. RC.

UNITED STATES PATE T ()FFICE JAMES 0. BROWN, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND JOSIAH QUINCY, OF SAME PLACE, AND JOHN R. GRAHAM, OF QUINCY, MASSACHUSETTS, TRUSTEES.

STREET-CAR EQUALIZER.

SPECIFICATION forming part of Letters Patent No. 549,763, dated November 12, 1895.

Application filed June 27, 1895. Serial No. 554,206. (No model.)

To in whom it may concern: connections between the end portions of each Be it known that I, JAMES 0. BROWN, of rock-shaft and the car-body, which cause ver- Boston, in the county of Suffolk and State of tical pressure at either end of the car-body to Massachusetts, have invented certain new be communicated through the rock-shaft to 5 and usefullmprovementsin Street-CarEqualthe other end of the car-body. Said connec- 55 izers, of which the following is a specification. tions, as here shown, comprise crank-arms c This invention has for its object to provide 9, affixed rigidly to the ends of the rock-shaft,

simple and effective means for preventing the and links 6 c connecting said arms with the vertical oscillating movements of the bodies car-body, as clearly shown in Fig. 3.

I of street-cars upon the truck-frame; and it It will be seen that in a car provided with 60 consists in the combination, with a car-body, the abovedescribed equahzing device the a truck-frame, and body-supporting springs common so-called teetering movement of interposed between the body and frame, of an the car-body, causing its ends to oscillate equahzing device comprising a rockshaft vertically through arcs of considerable length,

I journaled in bearings upon the truck-frame is prevented, the car-body being positively 65 and extending longitudinally of the car, and connected with the truck-frame by four posipositive or unyielding connections between tive connections which are variable in length said rock-shaft and the car-body, out beyond and vary simultaneously, so that the distance the wheels at both ends, whereby a vertical between all parts of the car-body and the movement of either end of the car is transframe must necessarily be uniform. 7o mitted through the rock-shaft to the other I am aware that rock-shafts journaled on end of the car-body, so that independent verthe truck-frame have been connected with a tical movements of either end of the body are car-body by torsional springs, as in Reissued prevented, the car-body being kept substan- Patent No. 5,359; but such springs are not tially parallel with the truck-frame. an equivalent of the inelastic or inflexible 75 Of the accompanying drawings, forming a links which I employ, because they (the said part of this specification, Figurel represents springs) necessarily permit more or less ina longitudinal section of a car-body and truckdependent movement of either end of the car, frame provided with my improved equalizing while the links which I employ in connection device. Fig. 2 represents asection on line 2 with the cranks and rock-shafts constitute 80 2 of Fig. 1 and a plan view of the parts below positive connections, preventing such indesaid line. Fig. 3 represents an end view of pendent movement.

the construction shown in Fig. 1. I am also aware that rock-shafts have been The same letters of reference indicate the disposed transversely of the car-body in bearsame parts in all the figures. ings on the truck and connected by links 85 In the drawings, a represents the body of with the car-body for equalizing purposes to astreet-car, and 19 represents the truck-frame, prevent sidewise tilting; but it is necessary which is provided with the usual wheels cand to the accomplishment of my object that the supports the body in the usual or any suitequalizing-shafts extend longitudinally of the 40 able manner, suitable springs d being intercar-body, for the object is to prevent endwise 9o posed between the said frame and car-body. tilting of the car, the invention being spe- In carrying out my invention Iprovide an cially applicable to street-cars, wherein it is equalizing mechanism to keep the car-body customary to have the body of the car project substantially parallel with the truck-frame considerably beyond the wheels at both ends,

and prevent independent vertical movement giving a leverage productive of the endwise- 5 of either end of the car-body. Said mechantilting motion from comparatively slight ism comprises two rock-shafts e, which are causes. journaled in bearings ff on the truck-frame It is not only necessary to the practical acand extend longitudinally of the car beyond complishment of the object of my invention the wheels, and suitable inelastic or inflexible that the equalizing-shafts extend longitudi- 10o nally of the ear-body, but it is highly important that they extend beyond the wheels, so that the link connections can be made outwardl y beyond the centers of endwise up-anddown oscillation; and herein the invention involves more than the mere changing of the equalizing-shaftsfrom transverse to longi' tudinal position, but eilects a new relation of the parts of the vehicle to the parts of the equalizing mechanism and a novel co1nbi11ation, operating as such to produce a new effeet.

I claim-- 1. The combination with a car-body,a truckframe, wheels on the latter and springs yieldingly supporting the body above the frame, of an equalizing device comprising a rockshaft journaled in bearings on the frame and extending lengthwise of the car beyond both front and rear wheels, and positive or unyielding connections between the ends of said shaft and the car-body whereby the said body is kept substantially parallel with the rockshaft.

2. The combination with a ear-bod y, a truckframe, wheels 011 the latter and springs yieldingly supporting the body above the frame, of an equalizing device comprising a rockshaft journaled in bearin on the frame and extending lengthwise of the car beyond both front and rear wheels, crank-arms affixed to the end portions of said shaft, and inflexible or inelastic links positively connecting said arms with the body of the car.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 25th day of June, A. l). 1895.

JAMES 0. BROWN.

\Vitnesses:

H. L. Ronnrns, A. D. HARRISON.