US256635A - James b - Google Patents

Description

( o Model.) I

J. B. BRAY.

GARBRAKE. No. 858,88 Patented Apr. 18,1882. 8

.8 Y i F? t INVBNTOR I ATTORNEYS.

Uivi'rm) STATES PATENT ()FFICEQ JAMES B. BRAY, or WAVERLY, NEW YORK.

CAR-B RAKE.

' SPECIFICATION forming part of Letters Patent No. 256,635, dated April 18, 1882.

Application filed January 25, 1882.

To all whom it may concern Be it known that I, JAMES B. BRAY, of Waverly, in the county of Tioga and State of New York, have inventeda ncwand Improved iica-tion, in which- Figure l is a vertical longitudinal section of a car and the rear portion ofthe tender. Fig. 2 is a rear end view of the tender. Fig. 3 is a detail, showing a modified arrangement of spring for applying the brakes.

My invention relates to an improvement in car-brakes of that general form in which all the brakes ot' the train are applied from the locomotive by means of a steanrpiston acting.

upon a buffer, which abuts against a corresponding bufi'er of the adjacent car, and each of which cars is provided with a continuous buffer-rod extending the whole length of the car, and terminating at each end in heads that act upon the adjacent buft'ers of the next car, so that all of the brakes are simultaneously applied from the same point.

My improvement in this general form of brake consists in running short stiff bufferrods through the trucks at each end of the car and connecting these short buffer-rods directly to the brake-beams by springs, then joining the two inner ends of the short buffer-rods to form a continuous connection by means ot'a traction rod running from truck to truck of the car, which traction-rod is at each outer end connected to the inner ends of the buffer-rods through a lever, all as hereinafter more fully described.

In the drawings, A represents one of the cars of the train, and B represents the locomotive or tender, upon which is located a buffer-rod, O, that is projected to the rear (when the brakes are to be applied) by means of a steam piston on the end of the same fitting within a cylinder whose inlet-valves for steam are under the control of the engineer. Each of the cars of the train is fitted with the same appliance, which I willnow proceed to de-' scribe.

D D are short stiff tinder-rods passing (No model.)

through the trucks at each end of the car, and made stout enough to resist bending or doubling up under the compressive strain to which they are subjected. These buffer-rods are provided with buffer-heads at their outer ends to receive the impact of the adjacent buffers, and

the-power applied to them is transmitted directly to the brake-beams E E E E through the medium of springs F F F F, interposed between guide-plates on the brake-beams, and

a rigid collar, or, on each of the buffer-rods.

Now, it will be seen that if both the bufferrods were one and the same, extending the full length of the car, the strain on it being a compressive strain, it would be certain to spring or double or bend up unless it were made so heavy as to be impracticable. I therefore discontinue the stout buffer-rods between the trucks and connect them by levers G G and a relatively small traction-rod, H. These .70

levers I fulcrum upon abar, I, extending from the truck-frame, and they serve to change the character of the strain between the bufferrods proper from a compressive strain into a tensile strain or traction, which permits me'to '75 use very light iron between the two bufferrods and still connect the latter by a practically continuous connection, which causes the driving in of one buffer-head to effect a protrusion of the other or rear buffer-head of the 30 same car, and this, transmits a similar effect to-the next car in the rear.

Now, it will be seen when the cars are moving in the direction indicated bythe arrow 00 and a strain from the locomotive-buffer is brought against the front buffer of the next car the front buffer-rod moves to the remand applies, through its collara and the spring F, a strain upon the rear brake-beam,E, of the front truck; and the movement being transo the opposite direction and the buffer-rods are projected in the opposite direction, then their collars a act through the other springs, F F, and the otherbrake-beams,E E, are applied.

The object of' the springs .F F is to permit the strain transmitted to be equally dist-rib no uted to the front and back trucks. These springs do not bear always against the brake beams, but are removed therefrom when the brakes are not applied a distance equal to the distance between the buffers of two cars.

To hold the outer end of the buffer-rods in proper position they are swung by rods J to the bottom of the car.

In modifying my invention I may not use the spiral i'prrn of springs shown in Fig. l and run thebiifier-rod through guide-plates on the brake-beams; but I may in some cases run the butl'errod beneath the brake-beams, as in Fig. 3, and interpose aspring, F of rubber or other material, between the brake-bar and a lag or abutment on said bufl'enrod. I may also locate the lovers G G between the two pairs of wheels of each truck, instead of back of the trucks, as shown.

In defining my invention more clearly still, I would state that I do not claim broadly connecting the short independent buffer-rods by a traction-rod, as 1 am aware that this has been done heretofore by a chain and pulley connecting the buffer-rods and the traction-rod, and I claim this feature only when the buffer-rods .have a direct bearing against the brake-beams nection with a steam-cylinder on the engine,

I may employ any other mechanical means for projecting the buffer-red that may be found desirable.

Among other advantages of my invention may be mentioned the fact that its use does not require any alteration of or injury to the common appliances already in use.

Having thus described my invention, what I claim as new is 1. In a car-brake in which the brakes are applied by pressure upon a butter-rod transmitted from the engine, the combination of short buffer-rods extending through the tracks, the brake-beamshaviug a direct connection with the buffer-rods through springs, a traction-rod extending from track to truck for transmitting the movement of one buffer to the other, and levers for connecting the buffer-rods to the traction-rod, as and for the purpose described.

2. The combination of the brake-beams, the short buffer-rods extending through the trucks and passing through a guide attached to the brake-beams and having rigid collars a,spiral springs arranged between the collars and the brake-beams, the levers G r, and the tractionrod H, as and for the purpose described.

3. The combination of the brake-beams, the short bufiferrods with collars a, extending through thetrucks and passingthrough aguide attached to the brake-beams, the springs arranged between the collar a and the brakebeams, thefulcrum-bar I, attached to the truckbeam, the levers G G, and traction-rod H, substantially as shown and described.

The above specification of my invention signed by me in the presence of two subscribiug witnesses.

J. F. SnonMAKEn, EDWD. WV. BYRN.

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