US26307A - Alfred f - Google Patents

Description

A. F. TOULMIR.

Car-Brake.

No. 26,307. Patented Nov. 29, 1859.

Witnesses;

0 Inventor:

RAILROAD-CAR BRAKE.

Specification of Letters Patent No. 26,307, dated November; 29,

To all whom. 'it may concern: I

Be it known that I, ALFRED F. TOULMIR,

of Ellicotts Mills, in the county of Howard,

inthe State of Maryland, have invented a new and Improved Car-Brake; andflI do hereby declare that the following is a full and exact description thereof, reference be ing had to the accompanying drawings, whereof-- v Drawing No. 1 is a view of the bottom of the car (as seen from the track) with the car in motion, and the cams free of the brake-blocks, or in other words the brakes up. Drawing No. 2 is a view of the bottom of the car (as seen from the track) with the car coming to, or at, a rest, (with cams pressing against the brake blocks) or in other words the brakes down. Drawing No. 3 represents the elevation of either end of the car, showing the connection between the engineers, brakemans, or conductors brakecord and the brakes.

For convenience of representation the trucks are not shown, and similar letters and figures will designate like parts in the various. drawings. I

To enable others skilled in the art to make I and use my invention I will proceed to describe its construction and operation.

I construct my car in any of the known forms, and apply thereto the usual appendages, such as trucks, brake-blocks, cam rods and cams, and also an engineer, brakesman, or conductors brake-cord communicating with the engine and each and every end of every car,(1n the manner to be described) so that when this brake-cord or brake-chain is pulled a simultaneous putting down of the brakes may be effected. Toward the center and beneath the bottom of each car I place a swivel bar (b) moving upon a pivot (p). On the oppositesides of the swivel bar, and pressing in opposite directions are springs (S S). To the ends of the swivel (6) bar are fastened chains (0 0 running to the cam-rods (R) The tongues of the camrods and their cams are perpendicular to the bottom of the car when the cars are in motion, either forward or backward, but the cams are pressing against the brakeblooks, and the tongues of the cam rods (t t) are inclined toward the swivel bar and the swivel bar (6) at right angles to the sides of the car: (and the springs at rest) when the cars are coming to, or at, a rest or stop. To the cam rods or their tongues, chains by means of aslotflj(0.-,t) .thelo p .motive is moved forward ,thecouplingb r drawn towardithe ends of thef swivel bar C C are also attached, runningin th op posite direction to ,the chains; c? c? hese chains O Q are fastened lto lal slide )bhto w; which slide,iat the other endvof it,f;the;c n p-1560 ling pin (a) I is} yqconneotedwandg "passes. through, allowing thejslide and the coupling bar (c-b) tomovenforwardand backward j (0-2)) draws the slidel ;forwardt}.(andi the 'ik I chains C C. are of .suclra lejrigt th when1 drawn toward theflendsjfofIthe c ,I the tongues of the cam.rodstlareperpendicular to the bottom of the car I the cams become free from the brake-bloc ,and the brakes up. A cross piece X is lattached tothe slide (Z), and one end (A) ofthecrosspiecei drawn up an inclined planefl until it is: caught by a shoulder of avtrigger as repre -f sented at (P), and whenthusjcaughtthe brakes are up untilthe engineerwor con ductor shall choose to putthem down. gThe train now can moveforward or backward 1 without hindrance fromthe brakes; 89 E When the engineer or thei conductorjor I brakesman desires I to put; down. the brakes he pulls the brakecOrdQ;(E,Qcd) or chain which runs through each (car (after the manner of the v.sconnnon vgconductor sdsignalI8 cord to the engineersbell) andis connected 6 j (at each platform, to. theunderflportion of; the projection of the. roof) to a wheel (with spiral spring. withln to bring; wheel, after being revolved, backto its jnor mal condition). This wheel [is attached to I the engineers brake-cord j,(E,fic-d); and

when the cord is pulledpby the engineer brakesman or conductor the wheel revolves upon a pivot until its revolutionhasbrought a lip 71-? in .contactwith and against the bell crank lever (is), pivoted at (K), and pushed the crank (as shown by dottedqlines on Drawing No 3) untilf the (crank in its movement has pulled the cord. ('I,jd). This h cord (r-d) releases the crosspiece X yfrom the shoulder of the trigger at The icross II piece being released, the slide (Z), thechain .f C G, and the tongue (at) Qrt cammark (R), are innnediately} drawn.1 toward; the swivel bar (1)) by the force of the springs? (S S) actinmthrough; the chain fe cfliandjfi the tongue 2; t) ofthe camQr d beingthus 1 (b) the spread ofthe cams is thrown against.

the brake blocks,and thuscheckjthe motion of the cars. Thiswheel movesiniitsy revolution, in a direction exactly contrary to the spring within it, and by means of this spring returns to its normal condition so' soon as the pull upon the cord, in the hand of the conductor or engineer, ceases. Thus it will be seen that not a second of time elapses from the moment when the engineer or conductor pulls the brake-cord to the period when the brakes are simultaneously applied throughout the entire train, and in the second place it will be observed that it requires no greater power to put down the brakes, simultaneously through the entire train, than is now requisite to pull the common signal cord to the engineers bell.

I do not claim as new or novel the releasing of brakes by the forward or tractive movement of the train, but

I claim as my invention 1. The mode described of simultaneously applying, or putting down, brakes by means of the brake-c0rd (E-0-d), the box spring (W) the crank lever (is), the trigger (P),

the cross piece (X), the slide (Z) and the swivel bar (1)) with its springs S S and S S, arranged as described.

2. I also claim the mode described of instantaneously freeing, relieving, or raising the brakes, and of keeping them free when raised, (until the engineer, conductor or brakesman shall desire to apply them,) by means of the forward or tractive movement of the train in combination with the slide (Z) the cross piece (X) and the trigger with its shoulder (P), arranged and operating as described.

ALFRED F. TOULMIR. Witnesses:

R. SNOWDEN AN DREWS,

- 7'. M. WOOLDRIDGE.

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