USRE22630E - Railway frog body - Google Patents

Description

c. w. B REED ETAL Re. 22,630

RAILWAY FR OG BODY April 17, 1945.

ori inal Filed July 27, 1942 2 Sheets-Sheet 1 III.

v. KN,

. MN v i, a /uw GEORGE R; BURKHARDT n'Y AT'IIY.

April 17, 1945. w BREED ETAL Re. 22,630

RAILWAY FROG- BODY Original Filed July 27, 1942 2 Sheets-Sheet 2 INVENTOBS CHARLES w. csonc: n. au

BREED RKIIARDI v v T'IY.

Reissued Apr. 17, 1945 UNITED STATES PATENT OFFICE j Charles W. Breed, Western Springs, and George R. Burkhardt, Chicago, Ill., assignors to American Brake Shoe Company, New York, N. Y., a

corporation of Delaware Original No. 2,335,994, dated December 7, 19 43, Serial No. 452,478, July 27', 1942. Application. for reissueDecember 2, 1944, Serial No. 566,332

9- Claims. (01. 246-470)- This invention relates to cast or forgedv bodies of railway track frogs, of either the type in which the body comprises the frog point and wing rail elements cast or forged; in one piece, or the. typestated, is exceptionally strong with respect to" supporting wheel loads, a special and important object of the invention is to construct said body of box-girder form, while providing a body which is very unlikely to become cracked or broken by wheel loads or shocks imposed upon the same in service. A further and important object of the frogbody are transmitted to the bases of the wing: rails.

invention is to provide only longitudinally extending vertical members or'webs, to the exclusion of transversely extending vertical members or webs, between the top and the bottom chord members of the box-girder structure, thereby to avoid in manufacture cracks or Weaknesses which would be likely to occur due to the slower cool ing of: the greater masses, of metal at the junctions of the longitudinal and transverse verticalmembers than in said members, if transversely extending vertical members in addition to long-itudinally extending, vertical members were used.

Further to. the end of providing, a frog (body which is exceptionally strong and unlikely to be-.

come cracked or broken in service, a special and important object of the invention. is not only to. construct said body of box-girder form, devoid of transversely extending vertical members between the top and the bottom chord members" thereof and including only'longitudinally'extendi-ng vertical member-s between the said top and bottom chord members thereof, but to dispose saidlongitudinally extending members substantially beneath the 'traflic bearing portions of" the top chord member so as-most effectively 'to rein"- force and stiffen said trafiict bearing portions; In this connection and with particularreference to a frog body of the insert type, another special and important object of the invention is to construct.

the frog body so that the lower chord thereof rests at its sides upon the base flanges of the wing rails, whereby traflic loads imposed on. the

According to the invention the frog, body may, as aforesaid, be cast in one piece, or it may be composed ofseparate top and. bottom chord members which may remain separate from each other or which may be welded together toform a unitary structure. In any event, another special and important. object of the invention. is to form said body with. suitably located openings to en-- able. either casting ofv the same in one piece or convenient welding. together of the top and the bottom chord members thereof it these members are formed separately from each other.

With: the foregoing and other objects in view, which will. become more fully apparent as the nature of the invention is better understood, the same consists in a frog body, or, in case the frog body is of the insertv type, in a composite frog structure, embodying the novel features of construction, combination and. arrangement of parts sidered as a whole; and; the frog body in the formof an insert embody the featuresof the invention.

Figures 2, 3 and 4- are transverse sections on the lines 2-2, 3 -3 and 4-4, respectively, of Fig. 1'.

Figure 5' is a top plan view of a frog body of the type in which the frog point and wing' rail elements are of one-piece-construction, and which embodies features of the invention; and Figures 6', 7 and 8 are transverse sections onthe. lines 6-0, l -1* and 8-4,, respectively, of Fig", 5. h

Referring to the drawings in detail, first with particular reference to the embodiment of the invention illustrated in Figs. 1' to 4, A designates,

generally, a frog of the insert type and of extending vertical members l4, to the exclusion of transversely extending vertical members, between said top and said bottom chord members. The top chord member I2 is provided with wheel flange accommodating depressions, or channels I5 forming the frog point I6 and the wheel-engaging portions I! to either side of said Ifrog point, and, as shown, said portions IT extend, as usual, in converging relationship to each other to a point I8 in advance of the sharp end of the frog point I6 and then in diverging relationship to each other to the end of the frog body remote from said frog point I'B.

Generally speaking, the frog body A is of blunted-point, arrow-head shape as viewed in plan and includes, at the end thereof toward which the frog point I6 diverges, a shank I9 which tapers inwardly to relatively outwardly extending shoulders at the junction of its narrower, inner end with the main portion of said body A;

I The inner end portions of the wing rails Ill, II] are disposed against the outer sides of the shank I9 and at their inner ends abut the shoulders 28. Onthe other hand, the inner end portions of the wing rails II, II are disposed against the outer sides of the main portion of the frog body A and have terminal portions which extend into overlapping relationship to the inner end portions of the wing rails I0, Ill, respectively.

Between the webs of the overlapping inner end portions of the wing rails I0 and II at each side of the frog is interposed a filler block 2|, while extending through the said overlapping inner end portions of said wing rails,'and through said filler blocks 2|, and through the shank IQ of the frog body A, are tie bolts 22 by means of which the inner end portions of the wing rails II],

III are clamped against the outer sides of said shank l9 and the relatively overlapping or terminal portions of the wing rails II, II are clamped against the interposed blocks 2|, thereby providing a rigid, composite, rail and frog bodyv structure at the related end of the frog.

At the outer sides of theinner end portions of the wing rails I I, I I are short rail sections 23, 23 and between the webs of these rail sections and the webs of the said inner end portions of the wing rails II, II are interposed filler blocks 24, while extending through 23, and through the filler the inner end portions of the wing rails II, II and through the frog body A, are tie bolts25 by means of which the inner end portions of the wing rails II, II are clamped securely against the'outer sides of said frog body, thereby forming a rigid, composite, rail and frog body structure at this related end of the frog.

blocks 24 and through In accordance with usual practice and as is,

of course, understood, the tops of the wing rails I8 and II are flush, or substantially flush, with the top of the frog point I6 and the tops of the wheel engaging portions I'I, respectively, of the frog body A and the wheel flangeengaging or gage sides of the heads of said wing rails are flush, or substantially flush, with the related sides of the frog point l6 and the wheel engaging portions II, respectively, whereby said frog point I6 and said wheel engaging portions II form, in effect,-continuations of the wing rails I0 and II.

The shank I9 of the strong box-girder frog body A is formed at its sides to fit in the fishing spaces at the outer sides of thewing rails I8, and the main portion or said frog body is formed at said short rail sections the other end portions of said vertical members its sides to fit into the fishing spaces at the inner or gage sides of the wing rails II, between the heads 26 and the bases 21 of said wing rails, respectively, and in accordance with the invention the solely longitudinally extending, to the exclusion of transversely extending, vertical side members I4 of said box-girder frog body follow the general shape of said body as viewed in plan, being disposed, generally speaking, parallel to each other. The end portions of said vertical members I4 which are coextensive in length with the shank I9 in part underlie the heads of the wing rails III, III as shown in Figs. 1 and 2, and

which are coextensive in length with the main portion of the frog body A in part underlie the heads of the wing rails II, II as shown in Figs. 1 and 4 and in part underlie the depressions I5 of the top chord member I2 at opposite sides of the frog point I'6 as shown in Figs. 1 and 3. In addition, a central, longitudinally extending vertical member '28 between the top and the bottom chord members I2 and I3 underlies the depressed or channeled portion I5 of the top chord member I2 beyond the point or tip of the frog point I6 and extends a sufficient distance beneath said point or tip to firmly support same. 'Thus, loads imposed on the, wheel engaging portions of the top chord member I2 of the frog body are transmitted through the vertical members I4 and 28 to the lower chord member I3 and through the latter member to the bases of the wing rails, the vertical members I4 serving eifectively to sustain the wheel contacting portions ll of the top chord member I2 and the vertical member 28 serving effectively to sustain the channeled portion of said top chord member in advance of the point or tip'of the frog point I6.

The top and bottom chord members I2 and I3,

' together with the vertical members I4 and 28 may, as aforesaid, be cast in one piece, in which event an opening 29 may be provided in the bottom chord member I3 beneath the frog point I6,

and the end of the frog body opposite the shank I9 may be open, as shown, to accommodate means for supporting the mold core, Alternatively, the top and the bottom chord members I2 and I3 may be cast or forged as separate, units with the vertical members I4 and 28 formed as parts of either ofsaid units or as parts of each of them. According to the embodiment of the invention illustrated in Figs. 1 to 4 the top and the bottom chord members are formed as separate units and the vertical members I4 and 28 are formed in part on each of said units. The separate units may remain. separated or they may be welded together, as indicated at 30, at the point where the vertical members I4 and 28 are divided, openings 3| being provided in the portions of the members I4 which lie to either side of the member 28 for the insertionof electrode or other means employed for frog point Ili and, as in the case of the insert type of frog body shown in Figs. 1 to 4, the vertical members M extend generally parallel to each other longitudinally of the frog beneath therail engaging portions l l'--- of the top chord member l 2- and beneath the channeled portions of said top chord member to either side of the tip portion of the frog point It so as effectively to sustain the wheel engaging and channeled portions of said top chordmemberi' Alt the ends of the frog body are portions 31. against: which the wing rails (not shown) are to be bolted with the tops and the gage sides of their heads disposed flush with the tops and the gage sides of the frog point I6" and the wing rail elements H respectively. In

the bottom chord member I3 are openings .il

which may accommodate means for supporting the core employed in casting the frog body A.

Due to the absence of any transverse vertically extending members between the top and the botton chord members of both the insert type of 'frog body shown in Figs. 1 to 4 and the onepiece type of frog body shown in Figs. 5 to 8, the chord members ll and I3 and the vertical members I l cool substantially uniformly with the re sult that there are avoided cracks and weaknesses such as might occur due to slower cooling of relatively large masses of metal at the junctions of transversely extending vertical members with the vertical members l4 if transversely extending vertical members were employed in addition to the longitudinally extending vertical members M Without further description it is thought that the features and advantages of the invention will be readily apparent to those skilled in the art, and it will of course be understood that changes in the form, proportion and minor details of construction may be resorted to, without departing from the spirit of the invention and scope of the appended claims.

We claim:

I. A railway frog body of box-girder form comprising a top chord member, a bottom chord member, the top chord member having channels defining a frog point and wheel engaging portions one to either side thereof, and, with respect to said body, longitudinally extending vertical members between said chord members, a pair of said vertical members being disposed one adjacent to one side and the other adjacent to the other side of 'said'body and each in part underlying awheel engaging portion and in part underlying a channeled portion of said top chord member, and another of said vertical members being disposed approximately medially of said body and underlying the tip portion of the frog point and the channeled portion of said top chord member in advance of the tip portion of said frog point.

2. A railway frog body of box-girder form comprising a top chord member having channels in the top thereof defining a frog point and wheel engaging portions one to either side thereof, a bottom chord member, a. pair of side vertical members between said chord members each in part underlying a part of the wheel engaging portion of the top member at the related side of the.

body and in part underlying the channeled portion of said top chord member, and another vertical member between said chord members extending longitudinally of said frog body medially thereof and in part underlying the tip portion of said frog point and in part underlying the channeled portion of said top chord member in advance of the tip portion of said frog point, said chord members being formed as separate units each carrying a part of each of said vertical members, and welds joining the parts of the respective vertical members together, the side vertical members havingopenings to accommodate an implement for chord member having channels defining a frog point and wheel engaging portions one to either side thereof,'said longitudinally extending vertical members being disposed generally parallel to each other and in part underlying the wheel engaging portions and in part underlying the ch'anneled portions of said top chord member, and at least one vertical member intermediate said longi-' tudinally extending members underlying a channeled portion of said top chord member and at- 'tached only to said top and bottom chord members.

5. A railway frog body of box-girder form comprising a top chord member, a bottom chord member, and, with respect to the axis of the frog point, longitudinally extending vertical members connecting the top and bottom chords, the top chord member having channels defining a frog point and wheel bearing'portions, one at either side thereof, said longitudinally extending vertical members having portions generally parallel to each other and including portions underlying the wheel bearing portions of the top chord member, and at least one vertical member intermediate said longitudinally extending members underlying the frog point of said top chord member and attached only to said top and bottom chord members.

6. A railway frog body of box-girder form comprising a top chord member, a bottom chord member, and, at each side of the axis of the frog point, vertical members connecting the top and bottom chords, the top chord member having channels defining a frog point and wheel bearing portions, one at either side thereof, said vertical members underlying said wheel bearing portions of the top chord member, and at least one additional vertical member underlying the frog point, said vertical members being attached to each other only through the top and bottom chords.

7. A railway frog body of box-girder form comprising a top chord member, a bottom chord member, and, at each side of the axis of the frog point, vertical members connecting the top and bottom chords, the top chord member having channels defining the frog point and wheel bearing portions, one at either side thereof, said vertical members at least in part underlying the wheel bearing portions of the top chord member, and at least one additional vertical member disposed intermediate the others and connecting the top and bottom chords, all said vertical members being of substantially uniform thickness throughout their length and being attached only to the top and bottom chord members.

8. A railway frog body of box-girder form comprising a top chord member, a bottom chord member, and, at each side of the body, vertical members connecting the top and bottom chords, the top chord member being channeled to define a frog point and wheel bearing portions, and at least one additional vertical member disposed intermediate the others and connecting the top and bottom chords, said vertical members being attached to each other only through the top and bottom chords. f

9. A railway frog body of box-girder form comprising a. top chord member, a. bottom chord member, and, at each side of the body, vertical members connecting the top and bottom chords, the top chord member being channeled to define a vfrog point and wheel bearing portions, said vertical members being disposed generally parallel to each other, and at least one additional vertical member disposed intermediate the others and connecting the top and bottom chords ad- "jacent the frog point, said vertical members being attached to each other only through the top and bottom chords. v

CHARLES W. BREED. GEORGE R. BURKHARDT.

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