US414891A - Teen twenty-fourths to bernard j - Google Patents

Description

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' CAB. BRAKE.' l 414,891. Patented Nov. 12, 1889.

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110.414.891. Patented Nov. 12, 1889.

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N. PETERS, Pholo-Llihogmphor. Wuhngon. D. C.

UNITED STATES PATENT OFFICE.`

CHARLES V. ROTE', OF LANCASTER, PENNSYLVANIA, ASSIGNOR OF SEVEN- TEEN TWENTY-FOURTHS' TO BERNARD J. MCGRANN AND EUGENE G.

SMITH, OF SAME PLACE.

CAR-BRAKE.

SPECIFIGAYTION forming part of Letters Patent No. 414,891, dated November 12, 188 9.

- Application filed March 28, 1889. Serial No. 305,069. (No model.)

. citizen of the United States, and a resident of Lancaster, county of Lancaster, and State of Pennsylvania, have invented a new and useful Improvement in Car-Brakes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification.

My invention relates to a novel arrangement of brake-levers and their connectingrods in connection with the brake-shoes and the power for applying the latter whereby such power is more fully utilized in applying the brakes.

In the ordinary application of steam-power or atmospheric pressure for the application of the brake-shoes to the wheels a large part of such power is wasted or lost through the supposed necessity heretofore exist-in g of con'-` necting one arm of the lever with a fixed point on the truck-frame, and, supposing such fixed point to be at one end-of the lever and forming the fulcrum therefor, the power to be applied to the lever centrally of its length for moving, and the brake-rod l'to be moved to be attached to the other or swinging end of the lever, it will readily be seen that the power applied will be divided between the brake-rod to be moved and the fixed point on the frame, at which latter point it accomplishes nothing but to afford a point on which the lever can be vibrated, the power or pull applied thereto being otherwise lost or wasted. I propose to remedy this difficulty by making the lever to which the power is applied a floating lever and connecting both its ends, through suitable rods and lever or levers, with the brake beams or shoes in such manner that all the power exerted, except such loss as may be due to friction of the parts, shall be utilized for apylying the brakes, as hereinafter described and claimed.

In the accompanying drawings, Figure lis a plan view of a car-truck with my improvements applied in the form they would assume when brake-shoes are applied on one, (the outer) side only of the wheels; and Fig. 2 is a similar view showing the arrangement of brake-levers, &c., for applying the brakeshoes to both sides of the same'wheels.

Referring first to Fig. l as showing the simpler arrangement of parts, A A indicate longitudinal bars of the truck-frame; A2 and A3, transverse bars thereof, the last-named bars A3 A3 giving support to the bolster, through which connection is made with the car-body in any usual manner.

B is a lever to which at or near the center of its length a rod bis pivoted, said rod at its opposite end connecting with the piston of a steam 0r air cylinder, or with other suitable motor from which the power for applying the brakes is derived, in any usual or preferred manner. To one end of the lever B is connected one end of a rod c, which at its opposite end connects through achain c with the shaft of a hand-wheel C, which may be operated in the usual manner for applying the brakes by hand, said shaft and the chain and rod connected therewith forming, in the ordinary arrangement of these parts, the iiXedpoint or fulcrurn on the frame on which the lever B is vibrated. The opposite end of the lever B has connected toit one end of a rod d, which at its opposite end is connected to the upper long arm of a lever D, which is fulcrumed in a swiveling yoke or bracket e, secured in the brake-beam E, the upper arm of which moves in a guiding-loop F, secured to the truck-frame.

The lower short arm of the lever D has one end of a rod d' connected to it, said rod extending under the bars A3, and being connected to the lower end of a second lever D',

pivoted in a swiveling yoke attached to the brake-beam E. The upper arm of lever D passes through a guiding-loop F', in which it yis held at any desired adjustment by means of a pin passed through any one of a series of perforations f in said guiding-loop.

The lconstruction and arrangement of parts thus far described are similar to such as are in common use, and in operation whenever the rod b, which connects with the steam or other power for operating the brakes, as stated, is drawn outwardit vibrates the lever B on its fixed fulcrum or point of attachment to the rod and chain c and c', which are held taut for that purpose by the hand-wheel shaft to which the chain is attached, and, the power being applied at the center of the length of said lever B, it will readily be seen that of each pound of power applied to vibrate said lever one half of said power will be utilized to operate the brakes, while the remaining half will be exerted in a direct pull on the lever fulcrum or rod c, and thence on the hand-wheel shaft or other point of attachment of the lever and thus lost or wasted.

It is the object of my invention to utilize this lost or wasted power, and to this end, while I use the arrangement of levers and rods described, I leave slack in the chain c', as indicated at c2, when the hand-wheel C is not in use without preventing or interfering with the use of said hand-wheel for applying the brakes when required, and thereby leaving the lever B free to movebodily, so far as the rod c is concerned, and making it constitute what I term a floating lever. To the same end of the leverB to which the rod c is connected I attach the outer end of a second rod g, which at its inner end is connected through a chain g' with one end of a lever G, pivoted at or near the center of its length in one end of the transverse bars A3 or to any other suitable support on the truck-frame. The opposite end ofthe lever G has one end of a rod h connected with it, the opposite end of said rod being b'ifurcated and having its fork-arms h' liattened and perforated at frequent intervals in their length to receive a through-pin h2, securing itV to the upper end of thebrake-lever D. The chain g' permits relative movement between the connected ends of levers G and B for adapting the lever B to be operated from the hand-wheel when required, and the perforations in the forked end h' of the rod 7L permit the adjustment of the lever D' and the pin h2 to take up any unnecessary slack in the brake-connections.

The pin in the guide-loop F', (indicated at 5o f-,) instead of passing through a slot in lever D', as usual, is inserted behind or outside of said lever, thereby not only leaving said lever free to rise and fall in the guiding-loop, but also free to be drawn inward when acted upon by the lever G, said pin being adjusted to prevent unnecessary play of the lever D.

The operation of the parts last above described will readily be understood. The end of the lever B to which the rod c is connected being left free to move outward by the slack in chain c', when power is applied to the rod b the movement of the said end and the power applied thereto is transferred, through the rod and chain g g', to the lever G, thence to the lever D', and through the connection of the latter with the lever D,

and said levers D and D' being connected with the brake-beams, as explained, all the power applied to the rod b is utilized for the application of the brakes, instead of one-half only, as in the ordinary arrangement of the brake rods and levers.

In Fig. 2 my improvement is shown applied to a truck adapted to receive brakeshoes on the inner adjacent sides of the truckwheels as well as on the outer sides thereof, the parts in said figure, so far as they correspend with the parts of Fig. l described, being indicated by the same letters.

E2 and E3 indicate the brake-beams (broken away) to which the inner shoes are applied; G, the supplemental lever, applied in this instance to the opposite end of the truck from lever B, (instead of at the center thereof,) and D2 D3 the brake-levers connected to the intermediate brake-beams E2 and E3. The levers B and G have each upon their free ends a sheave or grooved pulley b2 or g2, and the'connection between the levers B and G, instead of being direct by means of arod h, as above described, is made through rods t' t" and an interposed chain 2, the latter passing around the sheave b2 and connecting the rods z' and t', the former connecting with the brake-lever D and the latter with the lever D3, as shown. The brake-lever D' is connected with the brake-lever D2 by a similar arrangement of rods jj' and chain j?, the latter passing around the pulley g2 on the lever G. By this arrangement it will be seen that when the rod b is drawn outward its power will be expended, through the levers B and G and the connections described, upon the levers D, D', D2, and D3, and will all be utilized in the application of the brakes to both the outer and inner faces of the wheels. It will also be readily understood that the arrangement of the several levers and their connections can be varied to suit the arrangement of the brake-shoes relative to the wheels and to each other without departing from my invention.

Having now described my invention, I claim as new- 1. The combination, with the floating lever B and the brake-levers connected therewith, of the supplemental lever connected to said floating lever and also to the brake-levers, substantially as described.

2. The combination of the floating lever B, the lever G, connected therewith, and the brake-levers D and D', connected to the brakebeams, to each other, and to the levers B and G, substantially as described.

3. The combination, in a power-actuated brake mechanism, of the iloatinglever B, the brake-levers D, D', D2, and D3, the supplemental lever G, connected with said lever B and the brake-levers, and the interposed connections between said levers B and G and the brake-levers, all substantially as described.

4. The combination of the floating lever B IOO IIO

and the supplemental lever connected there- In testimony whereof I have herennto set with, said levers carrying the sheaves b2 and my hand this 25th day of Mal-oh, A. D. 1889. 1o

g2, the connection between said oating level` and the hand-Wheel shaft, the brake-levers CHARLES V. ROTE. D, D', D2, and D3, and the connections between said brake-levers and the floating and Witnesses:

supplemental levers, all substantially as and I. C. ARNOLD,

for the punpose described.

C. REsE GABY.

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