US64040A - stanbery - Google Patents

Description

SHEWARD 5Lv SANBERY.

Car Brake. 4

Patented AprA 23, 1867.

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JAMES SHEWARD AND GEORGE A. STANBERY, OF DUN KIRK, NEW YORK.

Letters Patent No..64,040, dated.' April 23, 1867.

IMPROVEMENT IN UAR-BRAKES.

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TO ALL WIIOM I'I MAY CONCERN:

Be it known that we, JAMES Sl-'IEWARD and GEORGE A. STANBERY, of the town of Dunkirk, county of Chautauqua, State of New York, have invented a new and improved Method oi' Applying Brakes te the Wheels of Railroad Cars and other vehicles, for the purposes of regulating their motion and of placing in the hands ot' the engineer, conductor, or other single person, the power to apply the brakes o n a train of cars by one motion and from any given part of the train, and while the same is in motion; and we do hereby declare that the follow ing is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The 4nature of our invention consists in using a worm or endless screw upon the axle, and from this, by means'of a cog-wheel working into it, secure a slow motion under highspeed; and from the motion of the coglwheel', by means of a face-plate and friction, secure the winding up upon a shaft the chain attached to the lever of the brakes. The principal use designed for our invention is setting brakes on railroad cars.

To enable others to make and use our invention, We will describe its construction and operation, as applied to railroad passenger cars, with the assistance of the accompanying drawings.

Let Figure l represent part of a truck of a car, showing a wheel, part of the timbers, part of the axle, and our invention as applied in perspective. i

Figure 2 represents a sectional View of the various parts of our invention; and Figure 3 shows a sectional View of the worm or screw and the axle. lThe letters of reference are the same in each figure.

A and B are castiron bars, through which pass the wrought-irony rods C The wroughtiron rods C are about one and a halt' or one and three-eighths inch diameter, with a head on the lower end, at e e, anda -screw cut down nearly baliI their length, as shown in the drawings.` These rods pass through n. plank, R, of about two inches thickness, twelve inches width, and long enough to reach over and be securely bolted on`the safety timber of the truck S. Thenuts ci d d fZ CZ ci (Z d are used for the purpose of adjusting the cross-bars A fand B and for sustaining the frame on the plank R at the point needed to place Vthe cog-wheel K in line with the centre of the axle U. E is a wroughtiron shaft of one and a halt` inch diameter, upon which is -firnily fastened a. face-plate, I. This shaft passes through the cog-wheel K and into the erossbarB, as shown in fig. 2, and also through the plank R. Upon its upper end is a lever or pulley marked F. Resting upon the `upper l end of the shaft E is a bolt, H, f hardened steel, and having a shoulder upon which the lever G rests. This bolt passes through and is steadied hy the cross-bar A. Upon the lower face of the cross-bar A there arevtwo inclined planes marked y. Fitting upon these planes are two similar reversed ones on the lever Gr, the object of which is, upon moving the lever, tc force the bolt H down upon the shaft E. In the cross-bar B is a chamber, in which is placed a spring, L, of India rubber, or other material, with disks or plates, m m, above and below it, and the object of which spring is to keep the face-plate I apart from the cog-wheelK. The necessary strength of this spring is secured by the temper screw o. K represents a cog-wheel working loosely upon th shaft E and into the worm or screw, as shown in iig. 1. rIhis wheel is represented as about eighteen inches. diameter, and must be cast, with its cogs chilled, ct' iron. Upon the upper side of K is a face or disk marked T, and upon i which theface of the plate I lits. When the invention is not Vin use for setting the brakes the spring L keeps the face-plate I about one-eighth or one-sixteenth' of an inch from the face ot' the cog-wheel K,as shown in the.. drawings at 7. Between the erossbarA and the nuts Z CZ, in the upper end ot' the rods C C, are India-rubber springs, n n, for the purpose ofregulating the pressure of the bolt I-I upon the shaft E and .compensating for anyA irregularity that may erist in the faces ofthe plate and wheel at 7. Fig. 3 is designed to show how the worm or screw is attached toaxles already in use. (We propose to have the worin or screw manufactured of wrought iron upon new axles and forming a part thereof.) Upon the axle Utwo sections of the worin or screw, shown at T, are fastened by lugs and bolts, asv at :c: w rz; fc. The inner eoncavitics ot' these sections have a diameter larger than that ofthe axle, and after being bolted together around the axle, and adjusted so as to revolve truly, the intervening space is lled with lead, tin, or other sot't metal, by casting, as shown at u`v u t',-

ffig. 3, after which tho bolts are still further tightened and the screw is ready for usc. To insure accuracy and tightness in the adjustment of the worm or screw, Weinsert a slip ot' sheet iron between the ,joints until after the soft vmetal is cast'into the space intervening between the axle and the pieces of the worm, after which we withdraw the sheet-iron strips and tighten the bolts. s

Having constructed the frame of cross-bars A and B with the rods C C, having the shaft E, bolt I'I, lever Gr, and cog-wheel K in-their places1 as'shown in fig. 1, the plank R is bolted into the safety timbers of the truck-- so as to throw the cogs of K into the meshes of the screw or worm with the centre of the face of K on a line with the centre of the axle U. When the car moves the wheel K revolves around the shaft E with regular motion and slowly, producing no effect upon the shaft or face-plate I. Now pull the lever G, as shown in iig. '.l,

toward you. The inclined planes y immediately force the shaft E with the face-plate I down upon the face or disk of the wheel K until the two faces come together with a force equivalent to that applied upon the lever G.

As soon as these faces are forced together the face-plate I, being fast upon the shaft E, turns with the cogwheel, carrying the shaft and the lever or pulley F. The chain of the brake-lever, being attached to F, as shown at I), fig. 2, is woundv up or tightened until the pull upon it-coun'terbalances" the amount of friction created between the faces of the plate I and wheel K, after which the wheel K will continue to revolve, merely holding the face-4 plate I to the point of pull or tension already obtained. More power being Athen vapplied to the lever 'G,a further winding of the chain takes place, until at length the brakes are set enough to stop the revolution of the carwheels, when all further strain is impossible. 4. This arrangement we claim willlenable the brakenian to put any desired amount of set upon his brakes at will. In order to enable 'an engineer on his locomotive to control all the brakes upon his train, we propose to connect the end of the lever G, at Z, wit-h a cord running through the train to the cab of the locomotive, and sc arranged as that a pull upon any part of tbe cord will, in any 'part of the train, pull upon the'lever Grof each of the cars and thus force the faces of the plate I and wheel K together with a power of winding upthe brake-chain proportioned to the pull on the cord.

We do not claim as our invention any arrangement of the cord for operating uponthe lever (Jr we do not vclaim to have invented the worm or endless screw, or the manner of putting the same on; we do not claim to` have invented the use of friction for the purpose of'setting bra-kes, as these are devices or uses well known.

What wedo claim as our invention, and desire to secure by Letters Patent,-is- I The application of the worm or endless screw tothe axle of any vehicle, where the axle revolves in combination with a cog-wheel, to produce a slow mot-ion under a high speed, and a face-plate forced upon the face of the cog-wheel as described herein for the purposes set forth. A l v I JAMES SHEWARD,

GEO. A. STANBERY.

Witnesses:

WM.- S. ALToN, GEO. H. SnEwAnD.

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