US467257A - mcarthur - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

J. MGARTHUR.

OAR BRAKE.

Pa, nted JaJn. 19, 1892.

JNVENTOR,

2W A TTORNE x5 (No Model.) 2 Sheets-Sheet 2.

J. MOARTHUR. GAR BRAKE.

No. 467,257. Patented Jan. 19, 1892.

WITNESSES;

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JNVENTOR, 4

- UNITED STATES PATENT OFFICE.

JAMES MCARTHUR, OF ROCHESTER, NElV YORK, ASSIGNOR OF ONE-HALF TO CHARLES J. lVIOI-IMAN, OF SAME PLACE.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 467,257, dated January 19, 1 892.

Application filed August 18,1891. Serial No. 403,013- (No model.)

To adl whom it may concern:

Be 1t known that 1, JAMES MCARTHUR, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Car-Brakes; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings and the letters of reference thereon.

My present invention has for its object to provide an improved brake for cars adapted to be operated by hand or power, which may be readily applied with great force to suddenly arrest the momentum, or, if desired, so as to gradually and easily check the car; and to these ends consists in certain novelties of construction and combination of parts, all as will be hereinafter fully described, and pointed out in the claims at the end of this specification.

In the drawings, Figure 1 is a side elevation of a portion of a car provided with my invention; Fig. 2, a bottom plan view of the same; Fig. 3, a longitudinal sectional view; Fig. 4, a cross-sectional view of Fig. 3; Fig. 5, a View showing the manner of applying the wheel-shoes in full and the track-shoes in dotted lines.

Similar letters of reference indicate similar parts.

Aindicates the sill of the car-body, provided with the depending bolts a, passing loosely through the lower horizontal frame A and encircled by the spring A bearin g on the up per sides of the journal-boxes B, in which the axles B, carrying the wheels B rotate. O indicates the truck in which the journalboxes are secured and on which the car-body rests through the springs A These parts are of the ordinary or any preferred construction and form no portion of my invention.

Extending across the truck is a beam D, having near its central portion a depending housing D ,in which are journaled two small rollers d, and near its outer ends are depend ing lugs cl cl, between which are pivoted levers D connected at their inner ends by links with the ring D to which are connected the ends of cords or chains E, extending to the vertical shafts E at the ends of the car, adapted to be rotated by the handles E Arranged on opposite sides of 'the truck, between the wheels, are two pairs of brake-shoes F, preferably having flanges f, each pair connected by a rod f, and one of each pair fastened to or formed with a rod or arm G, said arms being pivoted together in line with the beam D and connected by links 9 with the hooked ends of levers D Pivoted to the upper portion of the shoes F are brake-shoes H,adapted to cooperate with the wheels, and by reason of their pivotal connection have a firm and even bearing thereon when pressed into contact, and arranged upon the lower bars of the truck-fra me are lugs or projections G, against which the arms G of all the shoes are normally held by means of springs J, secured to said track-shoes and to the upper part of the truck. It will be noted that the bars G form toggles and that the springs are so arranged as to keep them flexed upward, the location of the lugs G being such that when in this position the shoes will be removed from the wheels and track; but when it is desired to apply the brakes and arrest E-hGIDOVGIllGHl) of the car the operator, by turning the handle E winds the chains E on the shaft and draws the inner ends of the levers D upward, thereby straightening out the toggles formed by bars G, when their outer or lower ends will be turned slightly upward by the springs J, (the bars pivoting on the lugs G,) causing the shoes H to be applied to the wheels, as in full lines, Fig. 5, by the pressure of the springs, which will give sufficient friction to arrest the car under ordinary conditions. If, however, it is desiredto arrest the car suddenly or apply more brakepressure, a further movement of the levers D will force the shoes F down upon the track, at the same time applying the shoes H with more power to the wheels, being assisted by the springs J, and it will be understood that with the parts properly arranged and proportioned the car could be lifted bodily upon the track-shoes and be thereby arrested, if desired. By such a construction as mine, therefore, either ordinary or, when desired, extraordinary brake-power can be applied, and this without the employment ofcomplicated mechanism.

Of course many modifications in the construction of the various parts could be made without departing from the spirit of my invention, so as to adapt it to six-wheel trucks, for instance, and the means for applying the brake could be greatly modified and air or steam operated pistons employed for moving the levers D The feature of allowing the springs to apply a portion of the pressure when the toggles are straightened is desirable, the operator moving the wheel-shoes so that the springs can act.

\Vhile I have in the claims employed the term frame, I do not wish to be understood as confining my invention to a construction employing a truck-frame on which the wheels are located as-neeessarily separate from the car-body and connected only by the spring, as the invention could as well be employed in other structures.

I claim as my invention 1. The combination,with the frame and the wheels thereon, of the toggle-arms pivoted together, the brake-shoes thereon co-operating with the wheels, the stops or lugs on the frame with which the toggle-arms co-operate, the springs connected to said arms, and means for operating the toggles, substantially as described.

2. The combination, with the frame and the wheels thereon, of the toggle-arms pivoted together, having the track shoes, the wheel brake-shoes pivoted thereon, the stops or lugs on the frame with which the toggle-arms eooperate, the springs connected to said arms, and means for operatingthc toggles, substantially as described.

3. The combination, with the frame and the wheels thereon, of the toggle-arms pivoted together, having the track-shoes, the wheelshoes pivoted thereto, the stops or lugs on the frame with which the toggle-arms co-operate, the springs connected to said arms and operating to hold them against the lugs and to press the shoes on the wheels when the toggles are operated, and means for operating the toggles, substantially as described.

4. The combination, with the frame and the wheels thereon, of the toggle-arms pivoted together, having the wheel and track shoes thereon, the springs for retracting said shoes, the levers pivoted on the track and connected to the pivots of the toggles, and the operatin g-chains connected to the other ends of said levers, substantially as described.

5. The combination, with the frame and the wheels thereon, of the toggle-arms pivoted together, having the wheel and track shoes thereon, the springs for retracting said shoes, the cross-beam, the housing and the rollers located thereon, the levers pivoted on said beam and connected to the toggles, and the chains connected to the levers, substantially as described.

JAMES MOARTII'UR. lVitnesses:

FRED. F. Cannon, ll. L. ()seoon.

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