US415998A - Jean b - Google Patents

Description

(No MddeL') J. B. Z. 'DUMAIS GAR BRAKE.

No. 415,998. Patented Nov. 26, 1889.

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, UNITED STATES PATENT OFFICE.

JEAN I Z. DUMAIS, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO JOSEPH DONNERSBERGER, OF SAME PLACE.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 415,998, dated November 26, 1889.

Application filed September 19, 1889- Serial No. 324,456. (No model.)

To all whom, it may concern.-

Be it known that I, JEAN B. Z. DUMAIS, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Oar-Brakes, which are fully set forth in the following specification, reference being had to the accompanying drawings, in which Figure 1 represents a bottom plan of a car with my improved brake applied; Fig. 2, a longitudinal vertical section of the same right side up and taken on the line 1 1 of Fig. 1; Fig. 3, a detail cross-section of the same, taken on the line 2 2 of Fig. 2; Fig. 4,a similar longitudinal section taken on the line 3 3 of Fig. 3; Fig. 5, a plan view of the toggle-levers detached, and Fig. 6 a plan view of a portion of the mechanism for operating the toggle detached from Fig. 4c of the drawings. Figs. 1 and 2 of the drawings are upon time scale and the remaining figures upon another scale enlarged from the former.

My invention relates to abrake mechanism which may be operated separately on each car, or may be connected from car to car and thence to the driver on a grip-car, so that the brakes maybe applied to all of the cars from the latter, thus adapting the invention particularly for use upon cars running on cable railways.

I will proceed to describe in detail the construction and operation of a brake mechanism in which I have embodied my invention in one way, and will then point out definitely in claims the special improvements which I believe to be new and wish to protect by Letters Patent.

In the drawings, A represents the bottom or platform of a street-railway car, which is mounted upon trucks B in any ordinary manner. The brake-bars C are placed on the inside of the respective wheels, and are provided with brake-shoes c, and are suspended by swinging hangers c, all these parts being of ordinary construction. A toggle D is arranged in the central space between the respective truck-wheels near the ends of the car, the members (Z cl of which are forked at their outer ends to provide a circular bearing (1*, which rests upon a corresponding circular section a of the respective brake-bars, as shown in Figs. 1 and i of the drawings, the

respective brakebars being cut down to eireular form at these points for the purpose of receiving the ends of the respective togglelevers. The toggle may be connected to the respective brake-bars in any other suitable Way which will permit the required motion. The toggle-levers are pivoted together, as usual, at their inner ends by a pivot-pin (1 which extends somewhat beyond the toggle on each side thereof, as shown in Figs. 1 and 3 of the drawings.

Two brackets E are fastened to the bottom of the car and depend therefrom about midway of the car. These brackets are set side by side parallel with each other and a little distance apart, this distance being just sufiicient to easily accommodate the central portion of the toggle, which is received between the brackets. The depending portion of the brackets e is something like a plate, and preferably somewhat tapering, and in each there is a slot or recess 6, cut in from the lower edge upward, in which the respective projecting ends of the pivot-pin (l are respectively received. The toggle is thus held in place and guided in its vertical movements by these slotted or recessed plates. A rockshaft F is mounted in suitable bearings in the brackets E at one end and near the upper portion thereof. This shaft is pro vided at its central portion, between the bracketplates, with a crankarm f, either fastened rigidly to. the shaft or made in one piece therewith, the outer end of which is pivoted to the upper end of a yoke F, the lower end of which is connected to the toggle by the pivot-pin of the latter, which passes through it. Upon each end of the rock-shaft, outside of the bracket, is fixed an arm or lever G, and these two arms extend outward and downward toward the end of the car, being arranged parallel to each other. Each arm G carries at its outer end a journal'pin g, extending outward from each arm toward the respective sides of the car, and there is mounted upon each of these pins a pulley g. Back of these pulleys are pulleys II, mounted in brackets 7L depending from the bottom of the car. These brackets are short and so arranged that the pulleys mounted therein will be somewhat higher than the pulleys g, but will be in about the same vertical plane respectively as the latter. Still further in front or toward the end of the car are pulleys I, each of which has two grooves i 1', and is mounted in a bracket 1' depending from the bottom of the car. These brackets are arranged so that the pulleys I are somewhat higher and in front of the pulleys G, and so that theouter grooves in each will be in the respective planes of the pulleys 9, while the inner grooves 1" will be about in the respective planes of the ends of the arms G, as seen in Fig. 1 of the drawings.

On each side of the car is a rope or cable J, which is passed under the car over the outer groove in each of the pulleys I, thence around under the pulley g on the arm G, thence up over the pulley II to the other end of the car. Now it is evident that if either end of one of these cables is fastened to the car a pull upon the other end will tighten the cord underneath the pulley g and tend to raise it, which of course will lift the outer end of the arm G, on which the pulley is mounted, thereby vibrating the rock-shaft F in a direction which will turn downward the crank-arm f, thereby depressing the yoke F, and so bringing a downward pressure upon the toggle, whereby the brakes are set. The cord or cable should be fastened in any suitable Way at the rear end of the last car, and the cords of the several ears are connected by suitable hooks or linksj from car to car, and thence forward to any suitable lever mechanism upon the grip-car, so that the driver of the grip can at will bring a strain upon these continuous cords and so apply the brakes simultaneously to all of the cars. At the end of the car where the pulley mechanism is situated there is also another rope or cable K, which is fastened at one end to the free end of the arm G 011 this side of the car, and thence passes over the pulley I in the inner groove 1" thereof, and thence to the end of the car, where it is attached to a handbrake device K, which may be of any ordinary construction, and therefore requires no further explanation. On the opposite side of the car is another cord or cable L, which is fastened at one end to the free end of the other arm G, and is then passed forward under and over the other pulley I in the inner groove L. thereof, and thence backward to the opposite end of the car, where it is attached in like manner to any ordinary handbrake device L. It will be seen that with this arrangement of the secondary cables K and L the brakes on any one car may be applied by hand independently of the other cars and ateither end of the car, for whenever the strain is brought by the hand-brake device upon either of the cables K and L it is evident that one or the other of the arms G will be lifted, thereby vibrating the rockshaft to apply the brakes, as already described. These secondary devices do not at all interfere with the operation of the continuous braking mechanism applied to all of the cars by the driver on the grip, and, on the other hand, the continuous mechanism does not interfere with the working of the independent hand-brake'on any one of the ears in train whenever desired. The means for connecting the cables from car to car by suitablehooks and links will permit the cars to be readily disconnected, and any one may be used separately, being drawn by horses or otherwise, if occasion requires, in which case it will be provided with a complete braking mechanism, operated by hand, as usual, at either end of the car.

Instead of cords or cables and plain pulleys, chains and sprocketpulleys may be used, if desired, and in some cases may be found preferable. In the details of construction and special arrangement of devices changes may be made without losing the main characteristics of my invention, Hence I do not wish to be understood as limiting myself in all particulars to the precise details of construction and arrangement herein shown and described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The brake-bars, in combination with a toggle applied to said bars, a rock-shaft connected to the toggle and arranged to operate it, an arm fixed on said shaft and provided with a pulley on the free end thereof, two pulleys arranged above the pulley on said arm and in front and rear thereof, and a cord or cable passing over the latter pulleys and under the former, whereby the arm may be lifted and the toggle operated to apply the brakes, substantially as and for the purposes specified.

2. The brake-bars C, in combination with the toggle D, the rock-shaft F, provided with a crank-arm f, the yoke F, connecting the toggle with the said crank-arm, the arm or lever G, fixed on said rock-shaft, the pulley g on the end of the arm G, the pulleys II and I, and the rope or cable J on each car and adapted to be connected from car to car, substantially as and for the purposes specified.

3. The brake-bars, in combination with the toggle, the rock-shaft connected to the toggle, the arm G, fixed on said shaft, the twogrooved pulley I, and the cable attached at one end to the end of the arm G and passing over the pulley, and the hand-brake device at the end of the car, to which the other end of the cable is attached, whereby the brakes may be'applied on each car independently, substantially as and for the purposes specified.

4. The brake-levers, in combination with the toggle, the rock-shaft connected to the toggle, the arm or arms G, fixed 011 the rockshaft, a cable device applied to said arm and pendent hand device on the car upon which it is located, substantially as and for the pur- Io poses specified.

JEAN B. Z. DUMAIS. Witnesses:

A. M. BEST, J. M. THAcHER.

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