US758131A - Emergency-brake for street-railway cars. - Google Patents

Description

No. 758,131. PATENTED APR. 26, 1904.

P. FLOOD. EMERGENCY BRAKE FOR STREET RAILWAY CARS.

APPLICATION FILED AUG 27 1903. N0 MODEL. 2 SHEETS-QHEET 1.

PATENTED APR.- 26, 1904.

r v P. FLOOD. EMERGENCY BRAKE FOR STREET RAILWAY gARs.

APPLICATION TILED AUG. 27, 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

i To all whomlit may concern:

. shoe.

broken away of the modified form shown in arm P is in the form of a bell-crank lever and Patented A pril 26, I904.

PATENT f OFFICE.

PATRICK FLOOD, OF ALBANY, NEW YORK. I

EMERGENCY-BRAKE FOR SPECIFICATION forming part of Letters Patent N0. 758,131, dated April 26, 1904.

Application filed August 27, 1903 Be itknown that I, PATRICK FLooD, a citizen of the United States of America, and a resident of the city and county of Albany, State of New York, haveinvented certain new and useful Improvements in Emergency- Brakes for Street-Railway Cars, of which the following is a specification.

My invention relates to car-brakes for streetrailways; and the object of my invention is to provide an emergency-brake particularly adapted for use on steep grades, together with the improvements in connection therewith hereinafter particularly set forth and claimed. I attain this object by means of the mechanism illustrated in the accompanying drawings, in which I y Figure 1 is a plan of a car with parts broken away. showing .my brake and attachments. Fig. 2 is a section of a car, showing a side elevation of my invention. Fig. 3 is an end elevation of my invention. Fig. 4 is a side ele Y vation of a modified form of my invention. Fig. 5 is a plan with parts broken away of a car provided with another modified form of my invention. Fig. 6 is a detail view of the brake-arm P. Fig, 7 is a detail view of the handle. Fig. 8 is a detail view of the brake- Fig. 9 is an end elevation with parts Fig. 5. r

Similar characters refer to similarparts throughout the several views.

For, the purpose of arranging a brakeshoe which may be-placed between the track and the periphery of one of the wheels for the purpose of retarding or stopping a car on a grade I arrange the brake-shoeA in conneeei tion with the brake-arm. P, pivoting the two together in anysuitable manner at B. Brakeis provided with an elongated slot C, through which a round rod D with' squared ends passes. The end of the brake-arm P is mounted on the rod E. The rods D and E are supported by the adjustable links a? 6, respectively, to' the arm F, secured to the frame of the truck in any suitable manner, the links 03 6 having square openings fittingon the squared ends of the rods, respectively. As thus arranged .collars being adjusted by a set-screw.

STREET-RAILWAY.- CARS-1 Serial No. 170,936. (No model.)

6 being pivoted to the arm F or to dependent lugs secured thereto or formed integral therewith are capable of a movement in the direction of the length of the car, and the brakearm P being attached tolthe ends of the links d e, respectively,.is capable of a movementin the direction of the. length of the car.

portion of. the .brakearm P, carrying the One brake-shoe A, is so arranged in reference to :the track-rail T and car-wheel that when shoe will be in alinement with the rail, I place on the rod D the collarsl6 and- 17 and on the rod E the collars 18 and 19, each of which (Not shown.)

To draw the brake-shoebetween the periphery of. the wheel W. and the rail of the track T, I arrange a spring S, secured at one end to the motor-box M in. any suitable manbar at to the rod D, or in any suitable manner,

the resilienc'yof the spring tending to draw the rod D, and therefore the shoe A, forward,

bringing the shoe in contact with the wheel and track.

' I may attach the spring. S to-therodE instead of to the rod D, if desired. For the purpose of withdrawing the brake-shoe from contact with the wheel and rail I attach the .ohainG to the rod E, passing the chainover ithesheave O, and'connect the samewith the lever J. The .lever J is fulcrumeds at K to :the bottom. of; the car andihas a portionj extending beyond Fig.1..

V The chain L, secured to the end ofthe lever J and passing under the sheave Z and through the opening Z in the platform of the .car, extends above the platform and is preferably-provided at its end with the handle Hal Thishandle is the fulcrum K, as -.'shown in preferably provided, as: shown in Fig. 7 with two loops joined together at the bottom and separated at the top for the purpose of enabling the operatorto take hold of one of the two loops there is formed a swinging frame. The links all of the handle and to secure the other of the two loops on the projection h on the dashboard Q or secure the same in any convenient manner. rod R, extending to the opposite end of the car, where it engages with a sheave r and at the end beneath the platform of the car is attached to one end of the bell-crank lever U, which bell-crank lever acts as a pedal for the foot of the motorman. Thus when the motorman presses down on the pedal the lever J will be operated and the brake-shoe A will be drawn from contact with the wheel and rail. The same result will be attained by lifting the handle H.

It will be understood that I arrange on each side of the car brake-shoes mounted as described and that the rods E and D extend across the car, as shown in Fig. 1.

By making the rod E square at its connection with the link 0 and constructing the brake-arm P in the form shown, having a portion of the brake-arm projecting downward toward the rail, another portion thereof extending at but a slight angle to the rail, and having the rod E at the place of angle between the two portions of the arm P. I arrange, by means of the swinging links 41 e, a positive-direct movement of the brake-shoe under the influence of the spring S.

An important part of my invention is this construction of the brake-arm and the means for mounting it, by which there is assured a direct and positive movement of the brakeshoe to its place of contact between the wheel and the rail.

For the purpose of preventing dirt and mud from accumulating and remaining in the elongated slot 0 of the-brake-arm P, I construct an opening 0 therethrough, as shown in Fig. 6, through which thedirt may escape.

In Fig. 4 I show my brake-shoe and brakearm mounted as hereinbefore described, the modified form consisting simply in the means for operating the brake by the use ofthe chain V, pulley V, and sprocket V I attach the chain X to the chain V, the other end of the chain X being secured to the hook I at the point of intersection of the brakearm with its supporting-link. The chain V passes around the pulley V, secured to the motor-box M, and also about the sprocket V at one end of the rod Y, to which is secured the brake-handle Z. As thus arranged by the movement of the brake-handle the shoe may be inserted between the wheel and rail. For the purpose of removing the shoe from its position I attach a chain X to the rod conneeting the brake-arm and its link with the chain V, chain X extending in an opposite direction from the link supporting the brakearm from the direction in which the chain X extends therefrom. As thus arranged the movement of the brake-handle Z in the direction opposite to that in which the brake was The end of the lever j is attached to a the modifications simply being in arranging the yoke 9 on the rod E, securing the yoke by its projections 10 10 to the rod E, and in the yoke 9 mounting the block 11 carrying the roller 12, which roller is arranged to engage with the yoke 9. To the block 11 is attached the chain 13, which passes over the sheave 14 and is connected with the lever 15. The lever 15 is connected, by means of the chain,to the handle H,as in the manner shown and described in reference to Figs. 1 and 2. The lever 15 is also connected to a rod and chain'extending to'the opposite end of the car and operated by means of a foot attachment, as already described.

The object of the yoke 9 is to provide for the car turning a corner without straining or breaking the chain connecting the rod to the lever. The lever and its attachments being connected with the floor of the car while the rod E is connected with the truck, as the car swings about the corner or curve there is a strain upon the chain connecting the said rod with the said lever, and when the yoke 9 is provided with a block the block will move along the yoke toward one end or the other thereof, depending upon the side to which the curve is made, and undue strain on the lever and chain is thus avoided.

I have shown two ways of operating the brakeone by foot or pedal attachment, the other by brake rod or handle attachment. I preferably operate the brake by one of these methods at one end of the car and use the other method at the opposite end, for the reason that it is more convenient to have the pedal attachment on the front of the car, where it can be operated by the motorman by means of the foot when the car is going upgrade, and after the grades are passed the conductor at the rear end of the car can raise the brake by means of the brake rod or handle described.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In an emergency-brake for street-railway cars a car body and truck; abrake-shoe; abrake-arm in the form of a bell-crank lever secured thereto; a rod having a squared end engaging with a squared opening in swinging links on which rod said brake-arm is mounted; means for supporting said swinging links from the car-truck; a lever; a chain connecting said rod with said lever; a means for operating said lever from each end of the car, respectively; a spring connecting said rod with a support on the truck, substantially as described.

2.'In an emergency-brake for street-rail- Way cars; a car body and truck; a brake-shoe; a brake arn1 in the form of a bell-crank lever secured thereto; two rods upon which said brake-arm is mounted; swinging links supporting said rods; a yoke connected to one of said rods; a block carrying a chain mounted on said yoke; a lever to which said chain is connected; a means for operating said lever from either end of the car; a spring mounted on the car-truck and attached to one of said rods, all substantially as described.

3. In an emergency-brake; acar body and truck, a brake-shoe; a brake-arm in the form of a bell-crank lever; a swinging frame supporting said arm; a pulley secured to the PATRICK FLOOD.

Witnesses:

FREDERICK W. CAMERON, DUDLEY B. WADE.

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