US489023A - Car-brake - Google Patents

Description

A. MILLER.

GAR BRAKE.

M L m WW. g M f. N M

' fiat upper andlowcn sides and a cylindrical UNITE STAT PATENT OFFICE.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 489,023, dated January 3, 1893.

Application filed September 8, 1892. Serial No. 445.386. (No model.)

To. all whom it may concern:

Be it known that I, ARNOLD MILLER, a citizen of the United States, residing at Medford,

in car brakes and consists in the construction.

and arrangement of parts hereinafter described and definitely pointed out in the claims.

The aim and purpose of this invention is the provision of improved, simplified, eihment. and inexpensive means for setting the brakes of cars. This object I accomplish by the construction illustrated in the accompanymg drawings wherein like letters of reference indicate corresponding parts in the several views and in which.

Figure l is a perspective view of the brake mechanism. Fig. 2 is a detail perspective of the brake shoe. Fig. 3 is a similar view w th its parts separated and, Fig. 4 is a detail view of a connecting bar for the beams.

In the drawings A represents the brake beams, formed of angle iron preferably trough-shape in cross-section and inclined from their centers toward the ends.

A is the truss rod uniting the ends otthe beams. These beams are suspended from the base of the car by the jointed hangers a. On the ends of these beams are the brakeshocs, which are of the following construction.

B is the shoe proper having semi-circular flanges b-arranged with an intervening space between their ends and a circular central space. These flanges have vertical open ends with a semi-circular recess (1 on itsoutcr face,

into which extends, a headed pin' (1 having head as 0 The widthof the stem of the pin is less than the space between the ends of the flanges on the shoe. Vertical openings are passed through the yoke and stem 2. short distance back from the head. The head is of a diameter to exactly fit in the central space between the flanges of the shoe and owing to the difference between the stem and space between ,the ends of the flanges, the shoe has a slight tilting movement. When the yoke and shoe are united suitable pins are placed in the apertures of the former which pins also pass into the grooves b and the shoe is locked against lateral displacement. The tops of the yokes are perforated, and suitable hangers C are passed therethrough which are attached to the base of the car and support the brake.

in connection with the jointed hangers a.

The beams are arranged on opposite sides of the wheel so that the samemay be effectively blocked. To make the draw in opposite directions and simultaneous a lever D is pivoted-in a cross-castingDat the apex ot one of the beams. The lower end of the lever has an adjustable connecting link D thereon which has a chain'D connccted'to its opposite end, passing over a pulley D mounted ina casting d on the beam at the opposite side of the wheel. This chain is carried back and passes over a pulley D on the outer side of the adjacent wheels and thence forward to the beam on the opposite side of the rear wheels, where it is secured. It will be apparent that by drawing on the arm of lever D, which has the proper connection with the braking motor, the entire series of brakes will be setand all simultaneously. The construction of cast, ing D, is such that the beam passes and snugly fits in a trough-shaped recess in their larger ends, and have seats in their opposite ends in which the truss-rod rests. These castings servethe'dual purpose of braces for the beams and supports-for the pulleys, and lover.

To prevent side swinging of the mechanism, suitable butter rods E are secured to'the' castings F which have ears f on their underside spanning the bcamsandare locked in To force the bra'kes'frorn the wheelsI form place by cross bolts f engaging in the ears below the beams. The upper portions of these castings have conical shaped vertically arranged grooves G there the .taper beingin opposite direction respectively. In these grooves the ends of a rod Hare placed the extreme ends of which are provided with suitable enlargemen' to prevent the same from becoming separated from the castings. On the rod II are collars eand between the collars and castings are springs h sleeved on the rod. The rod is prevented from moving vertically in the groove by passing suitable pins through the casting above the rod.

When the brakesare set the springs are compressed, andserve to force the shoe apart as soon as the pressure is released. The object of making the grooves in the castings, conical is to allow of a swinging or lateral movement of the rod. x

I am aware that many minor changes in the detail of construction of the invention can be made and substituted for those herein i shown and described without in the least de- -1-. In a car brake, the combination'with four or more trussed beams carrying shoes on their ends, of cross pieces at the apex of the beams and trusses, pulleys -in certain cross pieces, a lever in one cross piece and a flexible connection between the lever and all'the beams, substantially as" described.

2. In a car brake, the combination. with the beam, of a yoke supported thereon having a recessed face, a pin in the recess, having a cylindrical head a shoe having severed flanges surrounding the head of'the pin and formed with grooves in their edges and means for locking the shoe from lateral displacement, substantially as described.

3. In a. car brake, the combination with two brake beams located on opposite sides of the wheels, of castings on the beams having conical grooves therein rods in thegrooves haying fixed collars thereon and. springs sleeved on the rods between the collars and castings, substantially as described.

In testimony whereof I ailix my signature in presence of two witnesses.

' ARNOLD illllilil llt.

\v' itn esses:

A max MATH n r, 1 1. ll. SCnwnri-n.

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