US753898A - Brake. - Google Patents

Description

PATENTED- MAR. 8

' J. A...& c. MAYS.

l BRAKE'. APPLIOATION FILED 00T. 31. 1903.

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BRAKE. APPLIGATON PILED 00T. 31. 1903. No MODEL.

PATENTED MAR. 8, 1904.

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UNITED STATES Patented March 8, 1904.

PATENT OEEICE.

JOSEPH A. MAYS AND CHARLES MAYS, oE PHILADELPmA, PENN- sYLvANTA.

; BRAKE.

SPECIFICATION forming part of Letters Patent No. 753,898, dated March 8, 1904.

Application filed October 3l, 1903. Serial No. 179,423. (N o modell.)

To all whom it nca/y concern:

Y residing at Philadelphia, in the county of Phila- -the chains.

delphia and State of Pennsylvania, have invented new and useful Improvements in Brakes, of which the following is a specification. Y

Our invention has relation to improvements in car-brakes of that kind or class whereby the braking is effected by contact with the rails of the road. V

The object is to provide a brake which is simple in construction, strong in operation, i

and durable in use. i

The invention embodies a vertically-movable frame, brake-arms carrying shoes, an eccentric to operate the frame, and means to operate the`eccentric, all as hereinafter will be fully set forth, and the asserted novelty particularly pointed out and distinctly claimed.

The improved brake is designed to be used in emergency instances where the .regular wheel-brakes fail to work from any cause, or it may be used in conjunction therewith to effect a quick stop of the car or train. `The brakes are so positioned and secured to the body of the car as to be operated from either end of the car.

In the drawings, Figure 1 is a bottom plan view of a position'of a car and showing the arrangements of the operating-pulleys and Fig. 2 lis a view in elevation across the track, showing the mechanism raised, with the brake-arms and the brakeshoes free from the track. Fig. 3 is a view in elevation similar to Fig. 2, showing brakearms lowered, with the brake-shoes in control with the rails of the track. Fig. 4 is a side View, partly in vertical` section, showing the central operating-pulleys and the eccentric. Fig. 5 is a view of one of the brakestands and rotary brake-shaft, carrying the actuating-pulley on its lower end. Fig. 6 is a detail plan of a portion of one of the brakearms, showing the manner of attaching and illustrated in different figures, they are designated by like reference-notations.

A designates the body of a car only a portion of which is shown and which may be of any of the usual and approved makes and constructions; The car is supported on wheels 1 in the usual manner, one of which is shown, and of course rests on trucks carried by the wheels. Because these elements formno part of our present invention and are not essential to completely understanding it they have not been illustrated. At a proper position on the car across its bottom is secured a strong girder or beam 2, having depending flanges along its sides, as indicated. At suitable distances apart and parallel with each other are trussrods or hangers 3 3, extending across the cars, as shown, and have their ends secured to the beam 2 and to theI timbers of the car. In the middle of these hangers 3 are formed alining bearings, wherein is journaled a shaft 4, on the projecting end portions of which areiiX- cdly mounted pulleys 5, provided with duplicate grooves, as indicated. In each groove is secured the end of the chains 6 7, which are so secured to e pulley as to act in the same direction,and rom the pulley the chains are carried horizontally in opposite directions and at right angles to the shaft of the pulley and have their end portions carried about grooved rollers or pulleys 8, journaled on depending stud-shafts 9, secured to the car, and

have their ends connected to rods 10, the other ends of the rods 10 being connected to the ends of chains 11,vvhich are carried around brake-actuating frame. This brake-actuating frame is made up of an upper brake-lifting bar 21, oppositely-arranged depending bars 22 23, having their upper ends secured to the bar 21 and their lower ends secured to a bar 24, the ends of which extend a proper distance outwardly and have the inner ends of the brake-bars pivotally connected thereto,as shown.

The brake-arms 25 consist of substantial metal bars pivotally connected to the crossbars 24:, as stated, and so placed as' to stand at a downward incline from their pivotal point and of such length as to bear with force on and against the rails when their pivotal points are lowered. On the outer and free end of each brake-bar is suitably fastened a brake-shoe 26, consisting of a proper bar of iron or steel of the desired length and secured at its end to the end of the brake-bars, substantially as shown. The shoes are braced against lateral displacement by braces 27 and are also braced against endwise displacement by brace-rods 28 29, having one end secured to the shoes and the other adjustably secured to the car, as seen at 30.

On the shaft 4 is mounted an eccentric or cam 32, arranged to bear on the cross-bar 24 and move it downward and cause the brakearms to extend and the brakes to be applied, and then when the brakes have served their purpose the cam is reversed and lifts and releases the brakes by bearing on the liftingbar 21. Chains 33 connect the lifting-bar 2l to the brakebars,so that when the bar moves upward the bars, with the brake-shoes, are lifted from contact with the rails. u

It is apparent that While we have shown the brake-shoes as formed to engage on the tread and against the iange of a common well-known street-rail any one skilled in the art can adapt the shoes toset in proper braking relation on other shapes of rails.

The operation is readily divined from the purview of the description; but it may be stated when the call is made or the exigency arises for the brakes to be applied the brakeman turns the handle, which communicates rotation to the pulley 14: and through the rnedium oi' the chains imparts rotation to the pulley 5, turning the cam and moving the brake-frame down, thus extending the brakearms and putting on the brakes. The reversal of the handle will, through the described connections, throw the brakes off.

Having thus fully described our invention, what we claim as new isf l. In a car-brake of the rail class, a hori- Zontally-mounted grooved pulley, an eccentric on the shaft of the pulley, a verticallyreciprocable frame actuated by the eccentric, brake-arms extending in opposite direction, pivotally connected to the reciprocable frame, shoes on the outer ends of the brake-arms to engage on the track-rails, and means to rotate the grooved pulley substantially as described.

2. A car-brake of the rail class, comprising a vertical brake-staf, a grooved pulley on the lower end of the brake-staff, oppositely-extended iexible members connected to the pulley, a horizontally-mounted shaft disposed endwise on the car, a grooved pulley on the shaft having the flexible members connected thereto, an eccentric or cam on the shaft, a vertically-reciprocable frame actuated by the cam, oppositely-extending brake-arms pivotally connected to the frame, brake-shoes carried on the outer ends of the brake-arms, and means connected to the brake-staff to actuate all the elements.

In testimony whereoil we aiix our signatures in presence of two witnesses.

JOSEPH A. MAYS. CHARLES MAYS.

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