US905165A - Car-truck side frame and brake-hanger. - Google Patents

Description

G; G` FL-DYD. GAB 'mimi am; FRAME ,um msm mem Patente Bec: l, 1908.Y

AEHLQAIDE FILED 1320.30, 1907.

UNITED sicariosV Pri ENT OFFICE GEGRGE G. FLOYD, 0F GRANITE, ILLLXOIS, ASSIGXUR TO AMERICAN STEEL IPOUNDRLFS,

OF'NEW YORK, N. Y., AND CHICAGO, ILLINOIS, .XAORPGRATION OF NEW JERSEY.

CARTRUGI FRAME AND BRZIE-ANGER.

Speeicaton cf Lettera Patent.

Patented Dec. 1, 1808.

Applicatiunled December 30, 1907. Serial No. 408,679.

To all who/m 'it may concern:

Be it knownV that I, Gronchi-2 G. FLorn,

- a citizen of the Ifnited States, residing at `'in cross-section, but, in order to do so, it has `heretofore been necessary to use a solid dry sand core of approximately 50 in. in length for each frame,`the manufacture and positioning of such core in the mold for each frame' being a souiize of considerable expense and annoyance. Another disadvantage of the use. of such a core lies in the Vfact that when the frame cools and shrinks lengthwise against the resistance offered by such core. not infrequentl,v are cracks produced in thc casting near the ends of the frame. 'lo avoid the use of such a core and the disadvantages incident to such use I have modified somewhat the cross-sectional shape of the compression portionof the frame without destroying its general channel shape or losing the advantages of such shape of beam. To accomplish this 'result I malte one of the flanges or legs of the channel section. preferably the outer one, much narrower and considerably thicker than is customary. thereby forming what may be called a bulb. and using therein approximately the same amount of metal as in a flange or leg of the ordinary, dimensions. Owing to the cuililoynieut of such contracted lmt nevertheess strong, bulb the molders are enabled to ram the sand between the two flanges. or more correctly between the bulb and iiangc or leev of the channel, sutlicently well so that no rysand core whatever is required. Since in a mold of this kind there are no junctions between dry and green sand.' the cost of finishing and'chipping the castings is reduced because there are no tins formed as is usual at such junctions. In my improved pattein for the production of such side-frames, the portion corresponding to the bulb or small thickened la e is divided at the center of the frame, and t e two .inrts are separate from the pattern proper. ter the pattern has been removed from the sand, the two bulb portions are withdrawn lengthwise in opposite directions, sufficient room or :space being provided -for this purpose the cavities produced by the core-prints of the cores forming the openings over the journalboxes. To secure the best results the compression member of the frame should b e curved in accordance with an arc of a true A circle.

When the portions of a. cast-metal side frame which are adapted to bear on the tops of the journal-boxes are made lla-t they are very likel not to be in the same .plane or parallel unes. as one end may cock u and the other down. As a .result the wo d` not bear level on both boxes alike. o overcome .this defect and ditlieulty I slightly Tround these surfaces, that is malte them convex,

whrieupon there is secured a true bearing.

exactly over the middle of each box without the necessity of any chipping or pressin of the ends ot the frame up or down. ,he

radius of this circle or curva-ture is so gagedv that it will take care of the usual foundry variation at this point without any further work on thc casting. Such a construction also makes doubly sure that the load delived by the side-frame tothe journals will be directly over the centers of the journals through the boxes, wedges, and the brosses. Instead of constructing the fra-me so that the tension member leads or starts directlyv away from those portions of the frame that bear on the tops-of the journal boxes, I make a slight depression or groove at each of these jumtious so that if either v.part which bears on the boxes is rough, uneven, untrue, swollen. or strained, and requires chipping, this may be accomplished without cutting into and weakening the tension member, which at these particular .points is subjected to considerable and severe strains.

Since the area of the surface of the ordinary railway car-truck side-frame on the top of the journal or oil :box is'largely in excess of the actual requirements for' bearing or crushing value, and since it is sometimes necessary to chip this surface smooth, an expensive operation by the wey, l' have provided each of these portions of the `trame with a hole extended therethrough,

whereby the cost of chipping is greatly reduced when finishing 1s required.

There is an especial tendency forcracks to appear near the upper ends of the divergent legs of the downwardly/bowed or bellied tension member. tendency and reduce the foundry loss occasioned by such defects, I make the outwardly-extended flanges of the legs of the tension member. or at least their upper parts, somewhat; thickened, the thickness grad ually decreasing downwardly.

I have also devised a new 'and improved brake-hanger and method of supporting and fastening the same in lace, The hanger consists of a vertically ung rod having a hook or loop at its lower end, its upper end being bent at right angles to the vertical strip and inserted in an aperture of the sideframe. A cutter-pin passed through a transverse hole at the inner end of the hanger prevents its outward displacement, while the vertical leg of the hanger itself prevents inward displacement. Y A

On the accompanying drawing, forming a part of this specification, I have illustrated a preferred and desirable embodiment of my invention, and on this drawing Figure l. is a partial side elevation and partial' longitudinal vertical section of a cast-metal railway car-truck side-frame embodying: my invention. The left-band portion of Fig. 2 is ad top plan view of the frame shown in Fig; '1, while the right-hand portion of the i same figure-is a bottom plan view of the same; Fig. 3 is an enlarged vertical section through thc brake-hanger on line 3--3 of Fig. l, as viewed in the direction indicated by the arrow; and Fig'. 4 is a fragmentary section through a portion of the mold aud 1 the compression member part of tbe pattern used for the production of the si le.fi'arnc illustrated in Fin'. 1.

The railway cartruck side-frame illustrated of the same general shape and contour as those now in ordinary use. though ,it varies materially from the latter in .-e\'

eral structural features. The top compression member or portion of the frame l0.' which has depending from its inner margin or edge a flange ll of the ordinanuulinwnsions and from its outer edge an cnlarg ment or bulb l2 (fcc Fig. 3) considerably narrower and thicker than the llaujge llfis bowed or curved upwardly. as' is clearly illustrated, in accordata-e with the arc of a true circle, a portion of the radiusmf which shown on Fig. l. As has been explained irl tlnintroduction, the purpose of ,this cnrvatnre is to facilitate the withdrawal or ren'ioal ot the two parts of the. pattern corresponding tothe bull.l l2. lt should. be nolice-: that the top of the frame. at each cud To overcome this i foundry practice that by using a pattern l and that the parts 14 ofthe frame, which l are adapted to rest on the tops of the journal boxes, are also supplied with substantially triangulanshaped apertures 15. The

cdreprints on the pattern which form in the sand recesses `or cavities for thesnpport of the cores used for the-production of the openings 13 form recesses in the mold suliciently large to permit the lengthwise withdrawal of the pair of pattern bulb strips 12, one of which is illustrated in Fig. 4. ln this figure the parting line is indicated at .fny, i and the compression portion of the pattern is shown embedded in the sand. The part i of the pattern corresponding to the a ge 1l lof the casting has been characterized 11, g while the main body of the compression i member has been characterized 10. Tt will be apparent to those skilled in bulb of the shape indicated at 12. which occupies a comparatively small space., the melder is Acnab ed to thoroughly ram the sand between the parts 11* and 12* so that; the green sand alone may be employed for the production of the channel compression member, no dry sand core beine,r used for this part. After the main pattern for the side-frame has been-withdrawn from the sand in the usual manner, the two bulb or' enlargement strips l2a are withdrawn lengthwise or endwise in opposite directions through the cavities or recesses produced in the sand by the`core-priuts at the ends of lie-frame. This absence of use of :i comparatirely large dry sand core. and the l avoidance of its` careful positioning' in Vthe mold. means a large financial saving in the production of the side-frames.` and this savj .ng is accomplished without saorilicing the strength of the completed frame. Furthcri more. since by eliminating1r thc use of the dry sand core no junctions between 'the saine and the green sand are occasioned in the l mold. the production of fins on the casting, l which ha re to he chipped util-.is also avoided.

lteterrin.;r again lo the surfaces ll adapt- ;cd to bear upon the tops of the' journal :boxes: it will be noted from the drawingr 1 that these surfaces are convex or curved lon- 115 ritudintlly of the frame.. The. reason for this construction is that wlicrc the two suil faros are flat il. is quite dillicult to cast. the

i frame so that these surfaces will be in the .fanaplanc unlessl they are chipped er tln- 12o i hed in sonic other manner. ily makingr them curved. as has been indicated, a truc heal-inf,r can alwaysl be secured directly over the middle of each box without any chipl pin.;r or prt-usiner of' the ends of the frame up 12F:

or down. which insuresl that the loud trans- 1 milled through the side-frame t0 the journals will bc directly mer the. centers et the I journals.

is supplied with an elongated opening lil, The downwardly-bowed or bellied tension 13u inemberut of the side-frame has a leg i7 in l ,the same vertical piane as tlie flange 11 of l the compression member, and also luis an outwardlyextended flauwe 18, the u wardly 2 divergent portions of which are clinracterized i9. Instead of having the ends of liis tension member jcin the surfaces 14 di` rectly, as is customary. I provide tlie small transverse grooves or recesses 20 'at their i junctions so that if for any reason the sur faces 14 require chipping or finishing. tliis f can be readily accomplished withoiit cutting into and weakening the tension member f al its top ends, whieb portions of this men ber are ordinarily subjected to severe strains.

I have indicated above that. the under surfaces or Walls 1+i are provided with substantially-triangular apertures l5. the olijelli: be ing te reduce the amount. of surface to be chipped, if for rinv reason these. surfaces rei qnire finishing am enabled to use these apertures without weakening the structure i because in the ordinary side-frame the area I i oi tbe frame bearing on tbe top of the jonrnal boxis considerably larger than is re quired for the bearing or crushing value. ln cast-metal sideframes of thisv general character there is a tendency for defects and cracks to occur in tlie legs or tliirecs 19 f of the tension member, and in orcer to strengthen this part of the ianie and prerent the occurrence of such cracks. I have made. the upper portions of tliese flanges or l legs thicker than is usual and have tapered the. thickness downwardly, as is clearly E shown in Fig. 1.

Extended inwardly from the vertical colif umn portions of tlic side-frame connectingy tlut compression and tension members arc a pair of centrally-apcrtnred hubs or lios-ses :2l integral witli tlie sidesfiaineandstrcngilr f cned by nicans of integral brackets or braces 'l`lic axial bore oi' eacli of these bosses l passes con'iplctcljr tlirougli tbc. Walloi' the side-frame permitting tbc intuincd leg or portion 23 ol a bent brake-hanger rod Q-l t0 pass"tlii'oii;1li thc boss and extend somewhat g beyond tlic inner surface of tlic frame. as is i clearly indicated in Fig. 2%. This protrndiiuir portion of tlw brake-hanger is transversely apci'tnrcil unil adapted io :iccmnniodate a critter-pin 5 wliieli prevents iuiinteutional n'itlidr-.in'al ot tlic hanger. This hanger has :i central vertically-extended pari 25 and itsv lower end nia)y lic equipped n'itli a nook :2 or :i loop or other form of supporting menus. lt will be readily apparent to illuso skilled in the art. that each of tlwsc hangers is tirinly j, economically manufactured, simple construction.

ield in place and prevented from dislodg nient or displacement by its cotter 9,5 and its vertical leg cr poi-tion 26. This is a particularly simple and convenient forni of brake-imager for use andjs readily and owing to its Although I have described in detail a number of structural tentures of my iniproved side-frame and brake-hanger. my inuentic-n is nevertheless not limited to .'fie precise construction shown and described. since it.- inay be varied considerably in minor de tails without departure from tiie heart. and essence of my invention as set forth iiL tbe appended claims. Por example, instead of pr Widing tiic :apertures i5 for the reduction l of the. surfaces. M, recesses in the surfaces could be used to accomplish tbe same result..

l. A cast-inetal car-truck side-franie liaring a compression member of gene-ral chan nel shape. one of the flanges or legs of which is in the 'forni of a bulb or thick narrow flange. substantially as described.

i'. A cast-nietal ear-truck sideframe ha ving :i compre 'ion member curved iii sul initial accordance withl an are of a true circle, said compression member bein g ot gen- I eral channel shape in cross-section substentially as described.

A cast-metal car-truck side-frame hav in" a compression member ci* general channel` sliape curved in substantial accordance with an :irc ot' n true circle. one of the flanges or legs of said cmuprcssion member being in ille foi-in of a bulb or iliiclr narrow flange, substantially as described.

4. A cast-metal car-truck side-fraaie lim'- Q ing` the surfaces of those portions tlicreoi` adaptedY tu rest on the journai boxes curved longitudinally of the frame, substantially. :is described; f

5. A. cast-nietal car-truck side-frame ha in;lr a recess at cacn ot" the junctions of tbe tension member with those portions oi the frame adapted to rest on 'tbe journal boxes, snbstantialy as described.

(i. A cast-metal car-truck sidefranie in which those portions adapted to rest on tlie journal boxes are apcri'uretl whereby tlie Surfaces to be chipped it' linisliing is required are reduced in area. substantially as de-

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