US106152A - Improvement in car-brakes - Google Patents

Description

it nai-Tfr W. o R I sw o to, `o F N n W Y o n le@ "atri/ni @ittica w IMPROVEMENT 1N CAR-BRAKES..

f 13mm-g paient N .-106,152, dated August 9, 1870- The Schedule referredltoiu these Lettere Patent and making of the same I, MERRITT W.l G nrswoen, of the city, county,

. `and'State of-'Ncw York, have invented a new and im`` ling is a` specieation; 1 y Y My invention relates` to the suspension of a pivotcd proved Brake for RailroadOal-s, of which thefbllowoscillating or' rocking har or fraaie from the truck of `a railroad car, Vin `iront ot' or between the wheels thereof, in-sueh nianneras that one end of tlie'banoiframe may bezldropped down upon the track, audio t fthe combination oi'fsueh a bar orfanie with theol- V14 dinary wheel-brakes, by means oi.' suitable links or joints, in such manner as `that .the friction 'of' said i brakes, when appliecbsball automatically operate upon x. the oscillating .bar or frame, and f'oree one endthereoidoivnaipon the'rrail jwith apower.proportionateto that with which thewheel is carried forwardandthe brake `brought to bear thereon, the object of my invention being to combine, with the resistance `of theordinary" brakes applied to the-wheels vof a car, the resistance if a brak-e applied to the rail, and to operate them both bythe ordinaryderiees and mechanical appliancesnowinuse t Inthe accompanyingdrawingfi ligure l is a sidey view oi' af car-truck to which my improved voscillating bar and brake is attached, illustratug the railaml'wheelllnakes applied and in operation. y i i,

Figure 2 is a longitudinal section taken through the 7 truekinside 0f the wheels-and ylooking outward, illustrating, in elevation, the inner side of thebar and its attachments and supports, the wheel-brakes being shown, however, `as at `rest,withdrawn from contact `with the wheel'sand rail.` t y Figure 3 illdstrates, in elevation, a modified 4form of: my rail-brake,.consisting oi' an' oscillating fraaie `working againsttheral, instead of asixnple barthc 'wheel-brakesbeing supported by -slides working upon the upper bar of `the frame.

" Figure 4 `is an end, view of ,the oscillating bar andl of the improved shoe secured thereto to bear upon the rail, illustrating the grooves cut in one side off ,said shoe, to facilitate the. breaking oiiV oi tl1e`edgeslas the .Ads the car-truck,y of any approved cnstruction. B,-its'wheels. y v 1 i (J,v the brake-bars of the truck, extending across the same transversely, and made. to slide to and from the wheels, in the`usual manner, byineans of a lever and cl1aius,workedby a brake-wheel and post on the plat.- i'ormof the car,y or by other customary and wellknown devices for the purpose. I

The brake-bars;however, instead of sliding `upon horizontal ways toand` from the wheels, are supported by such horizontal wayslonly `when drawn entirely back from the wheels.. *When thrown out to come into Contacttherewith, they are upheld. by the. action ot' supporting springs, in combination with the oscillating baror frame, as hereinafter more fully explained.

D D are the brake-blocks,- bearing against the peripheries of the ,wheels B B, and operated by the aetonof the brake-bars .0, in the usual manner.

A lfhnsyfaritbe brakes and appliances, as described,

and the mode ofoperating thesame, are old and wellknown devices, such as are ,in common use upon the railways ofthe country. i F is my oscillating-or'roeking rail-brake.

-It consists of a bar, F, pivoted centrally at S, be-

tween a hanger-bar, H, (extending on the outer` sideA of the track and wheels from oneaxle to `the other,

and seeuredtbereto by the same bolts and nuts used to fasten the ordinary horizontal braeeA', which extends between the same, as shown ii1fig.1,)and a lhanger-frame, I, secured' ou the inner side of the wheels tothe bottom of'the lower transverse truckbeam J, and made to clamp 0r embrace the sides thereof', as shown in iig. 2ot` the drawing.

`E 'E are the links, pivoted to .,tllebar Fat eit-h'er end thereof, and whose upper ends are secured to the ends of the brake-bars O,.bet\veen said bars yand thebrake-blocks D, these brake-blocks being` hinged to said links instead of being Yjointed directly tosaid bars, as is ordinarily the ease.

G G are detachable shoes or blocks, iir'mly secured nponthe under sides of the ends of the bar F, so as i to receive the wear and tear incidental to the application' of the brake to the rail, as hereinafter morel fully set forth. y y l '.lhese brake-shoes G are grooved longitudinally upon one side, (see fiff. 4,) so that, as they are worn down `(mnt-rally by contact with the head of then'ail, `the lip -or iange consequently formed upon that side ot' the bottom of the shoe will break off as soonas the shoe is worn down to one of the said grooves, andthe liability to accidents, which would follow were the lips or flanges formed on 'each side allowed' both .to remain so asto yembrace the rail, thus be avoided.

In iig. 2,'i t" are horizontal projections from theupper side of `the hanger-frame 1, npon'which the brakebars G 0 rest when drawn back to relieve the brakes' I). Y v

(e care rods or pins, secured to the under side of said bars U G, to bear upon the ends ot' springs K', se-

cured to the under side of thelower truck-beam J,'s`o as to project therefrom, asshown in iig. 2 ofthe drawing. t

lhese springs serve to` uphold the ba 's O C, after they. have been thrown out {remt-he rests it', in a horizontal plane therewith. It is evident that `various forms ot' springs may be thus applied vfor the purpose of supporting the brake-bars.. f

In operating the improved brakes, constructed as above described, when thel brake-blocks D are thrown ont and forced against the wheels B, turning in the directionindicated by the arrows in iig. 1, they first strike against the saine, each iu the horizontal plane in which they are upheld by the action of the springs K K, supporting their transverse connecting-bars C (l, (see iig. 2,) but so soon as they come into `close contact with the revolving wheels, the brake-blocks bearing against the front wheels are drawn upward, earrying up with them the corresponding arm ofthe pivoted bar, to which they are connected by the links E, while the brakes against the hind wheels are sinnlitancously forced downward, bearing down with them, to a corresponding extent, the opposite arm of the pivotcd bar F and the end of the-spring K, upon which the brakelbar C rests.

By the movement of the piroted bar F, thus pro.- dueed, thc. rear end thereof is brought to bear down upon the rail l with a degree of pressure proportionate to that of the brake-blocks upon the wheels and the velocity oi' their rotation. 1

So soon as the brake-blocks are withdrawn.from the wheels, the resistallce of the spring under the depressed rear brake-bar, combined with the weight of the elevated front brakc-bar, will operate toA bring these bars and the brakes to their original horizontal position, when they may be dra-wu back upon their rests ,t i, iig. 2, and thus secured against accidental.

vContact with the wheels.

L L', Vtig. 3, represent lny invention when constructed in the form of a frame. The lower bar, L, of theframe corresponds, in all essential particulars, with Y the bar G, above described, and is pivoted centrally,

in like manner, to 'a hanger, N, suspended from the trnck-bean1 or its frame-work.

At each end of this lower bar "L are two uprigh'ts, connected by an upper horizontal bar, L', so as to form the fra|ne,as illustrated in fig. 3.

M M are boxes or siides embracing the ,upper bar L of the frame, and made to slide smoothly back and forth thereon.

The ends of thetransverse bars C of the truck are secured to the rear ends of these slides, and to their forward ends are jointed the ordinary brake-blocks I). rJthe horizontal position of the bar L', when at rest, may be enforced by springs, placed under or otherwisc combined with the brake-bars C C, as before described.

The operation of the brakes, when applied tothe wheels, will serve to cause the frame to tip, so as to bring the rear end of its lower bar, L, to bear against the rail, substantially as described, with reference to the rail-brake G.

I contemplate, as a modification of my invention, employing a bar, G, pivoted at one end only, and connected with a single brake-bar, operating alone, as may be illustrated by considering the operation of the rear halt' of the bar G, in ti'wl, if parted beyond its pivot from the remainder thereof, and connected to and operated by the rear brake-block alone.

I claim as my inveution- ,1. A pivoted oscillating or rocking bar or frame, so supported from the truck of a railroad car and combined with its wheel-brakes, as that the friction of the latter upon the wheels shall operate to depress 'and force down upon the rail one end of said bar or frame, substantially in the manner and for the purpose herein set forth.

2.2. Lateral grooves formed in the sides of a railbrake-bar or shoe, G, substantially as and for the pur pose herein set forth.

Witness my hand to the foregoing specification this 22d day of January, A, I). 1870.

" MERRITT W. GRISWOLD.

Witnesses:

DAVID A. BURR, H. H. YOUNG.

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