US1741845A

US1741845A - Car-truck side frame

Info

Publication number: US1741845A
Application number: US280315A
Authority: US
Inventors: George T Johnson; Harry W Stertzbach
Original assignee: Buckeye Steel Castings Co
Current assignee: Buckeye Steel Castings Co
Priority date: 1928-05-24
Filing date: 1928-05-24
Publication date: 1929-12-31
Anticipated expiration: 1946-12-31

Description

1929- G. T. JOHNSON ET AL CAR TRUCK SIDE FRAME gnue'ntow 3 Sheets-Sheet 2 1929- GT. JOHNSON ET AL CAR TRUCK SIDE FRAME Filed May 24. 192B 4 I 1 I l l I I I I i -w i l l i i F -.WWWWWWWM WH i Dgc. 31, 1929. s. T. JOHNSON ET AL.

GAR TRUCK SIDE FRAME Filed May 24, 1928 5 Sheets-Sheet 5 fizz/4,1717% 7 ratiaea Dec. 31, 1929 UNITED" STATES P T NT OFFICE GEORGE r. .ronnsorr AND mar w. s'rii'n'rznncn, or COLUMBUS, on o, ASSIGNORS TO THE BUCKEYE srnnr. CASTINGS COMPANY, or COLUMBUS, onro GAR-TRUCK srnE FRAME Application filed May 24.

This invention relates to car'trucks of the flllbOflId type in which the side frames and ournal boxes are arranged inwardly in respect to the car wheels, and the primary oba structure which will efi'ectually withstand the stresses imposed 'by use and which may be economically manufactured. The invention is illustrated in the accompanying drawings and will be hereinafter fully described" and particularly defined.

In the drawin s, Figure 1 is a side elevation of a side frame embodying the invention;

Figure 2 is a top plan view of the same;

Figure 2 is a bottom plan view thereof;

Figure 3 is a central transverse section;

Figures 4 and 5 are detail sections taken on the lines 4-4 and 55, respectively, of Fig. 1;

Figure 6 is a detail end elevation;

Figures 7 8, 9 and 10 are detail sections taken, respectively, on the lines 77, 8 8, 99 and 10-10 of Fig. 1.

In the drawings, the numeral 1 designates the top or compression member, 2 the bottom or tensionvmember, and 3 the columns of a side frame connecting the top and bottom members, the car wheels in the fully assembled and mounted truck being arranged outwardly from the side frame, as indicated by the dotted lines in Fig. 3. The columns are straight and vertical on their opposed faces whereby the bolster opening defined by the columns and the top and bottom members will be of uniform width through its entire height so that the assembling of the side frames with the truck bolster will be facilitated and straight movement of the end of the bolster 'into the bolster opening will bring the parts 192;. Serial No. 280,315.

' into the roper relation. It will also be noted upon re erence to Fig. 3, that the top of the side frame, over the truck bolster opening slopes inwardly, thereby providing ample clearance betwetnthe side frame and the car bolster. The spring seat member 4 is located between the lower ends of the columns, and

it will be noted. particularly upon reference to Fig. 1, that the topandbottom of the tension member are in horizontal planes extend-.

ing to points well beyond the columns from which points the tension members curve upwardly, as at 5, to merge into straight upwardly inclined portions 6. From the straight portions 6 side plates 7 rise to merge into the top or compression member,

as shown in Fig. 1, said plates extending to The innermost the ends of the side frame. edges, 8, of these side plates extend upwardly to the top member on lines nearly ata right angle to the respective straightportion 6 of the bottom member and are reenforced by ribs or flanges 9 on their inner sides. Large openings 10 are thus formed through the side frame-at the outer sides of the columns 3 through which the brake beams are accessible so that the brake beams may be applied or taken down without removing the brake heads from the beams.

The ends of the brake beams pass through these openings so that if a brake han er should break, the tension member of the side frame, which is underneath the brake beam,

. will constitute a safety support and prevent the beam dropping to the track and derailing the car, it being noted that the brake hanger brackets 11 are located at the top ofthe respective openings "-10. opcnin 's 12 are formed through the-side plates F near the top or compression member and to avoid loss of strength reenforcing ribs or flanges 13 are formed on the inner faces of the plates around said openin s.

The previously mentioned curved ormation of the tension member causes bending stresses to be set up, and there is also a tendency toward high unit fibre stresses on the concave side of the member. To counteract this condition and provide an eflicient distribution of metal throughoutthe curved To reduce weight V areato absorb the direct tensile stressand to also have the centre of gravity as close to concave side of the member as possible. The

tension member is of box form in cross section, as shown in Fig. 3, and extending longitudinally-thereof is a'central rib 14 which terminates just beyond the curved portions of the member,.the sides and bottom of the box terminating near the .upper ends of the straight portions 6, and through-the lower portions of said rib are openings 15 wh ch tend to throw the locus of centers of gravity toward the concave side. As the load is placed upon the spring seat 4: and supported at the 'j ournal centers, the top or compression member may be considered as a beam deflecting in unison with the bottom or tens on member, and the' vertical members, including the sideplates 7 and the columns are hangers joining the bottom member w th the top member.

In order to have the most efiicient action,

and derive maximum support from the top member as a beam the hangers should be of a form most suitable for'taking axial loads. For this reason, the construction shown in Fig. 10 and previously described s employed, the same furnishing suitable edges to withstand any secondary bending stresses which may be set up in the side plates due to differences in flexure' between the top and bottom members. For the same reason, the-columns 3, as shown in Figs. 7 and 8 are of channel type with their side webs turned away from the bolster opening and provided with inwardly projecting ribs or flanges 16 along their edges, providing maximum area consistent with the spacing available and favorable manufacturing conditions. ln their lower portions, the columns have their flanges 16 united by a web 17 and corner ribs 18 connect the columns with the outer portions of the spring seat.

grooves 19 to engage the same, and the crown of the arch is box-like in cross section, as shown in Fig. 5 to attain the necessary strength. To reduce weight, the extremities of the frame are cut away as indicated at 20.

Having fully described our invention what we claim as new and desire to secure by Letters Patent, is

1. A side frame comprising atop member, a bottom member, and columns connect ng said members, the bottom member extending horizontally across the lower ends of the columns to points beyondithe columns and then curving upwardly, and a central longitudinal rib between the top and bottom walls of the curvedportion of the bottom member.

2. A side frame comprising a top member, a bottom member, and columns connecting said members, the bottom member extending horizontally across the lower ends of the columns to points beyond the columns and thencurving upwardly, and a central longitudinal rib between the top and bottom walls of the curved portion of the bottom member, sai d rib -having openingsthrough its outer portion.

3. A side frame comprising a top member, a bottom member, and vertical members connecting the top and bottom members, said vertical members being reinforced at their lower ends by a central vertical longitudinal rib which extends into said vertical members.

fl. A side frame comprising a top member, a bottom member, and columns connecting said members, the bottom member being straight between the columns and the columns being of channel formation with their side members directed outwardly and provided with reentrant ribs on their inner faces along their edges over the whole length of the collar. i

5. A side frame comprising a top member, a bottom member having-a web with an upturned -end, and columns connecting said members, the bottom member being straight between the columns and the columns being of channel formation with their side members directed outwardly and provided with reentrant ribs on their inner faces along their edges which connect with the upturned end of the bottom member web.

6. A side frame comprising a top member, a bottom member, columns connecting said members, the bottom member being straight betweenthe columns and curving upwardly beyond the columns, and upwardly converging inclined hanger elements connecting said top and bottom members and spaced outward- 1y from the columns whereby to define an opening through which a brake beam may be passed.

7 A side frame comprising a top member, a bottom member, straight columns connecting said members and defining therewith a bolster opening of uniform width, and upwardly converging inclined hanger elements connecting the top and bottom members and spaced longitudinally of the frame from the columns.

8. A car truck side frame including a compression member, a tension member, the ends of said members merging into each other and forming arc-shaped ends-for the side frame,

columns connecting said members, and

9. A car truck side frame as claimed in claim 8, including brake hanger brackets projecting laterally from the side frame, and arranged substantially centrally over the openings defined by the columns'and hanger elements.

10. A side frame for car trucks, comprising a top member, a bottom member and vertical members connecting the top and bottom members, the bottom member having its end portions extending in opposite directions and merging into the ends of the top member, said side frame having a bolster opening between the vertical members, and brake beam openings at opposite sides of the vertical members, each of said openings being sub stantially equal in area to each of the other openings, upwardly converging hanger elements connecting the top and bottom members and defining the outer walls of the brake beam openings, and webs extending from the hanger elements to the ends of the side frame. In testimony whereof, we have signed this specification.

GEORGE T. JOHNSON. HARRY W. STERTZBACH.

DlSOLAIMER 1,741,845.-George T. Johnson and Harry W. Stertzbaeh, Columbus, Ohio. CAR- TRUCK SIDE FRAME. Patent dated December 31, 1929. Disclaimer filed March 17, N32, by the assignee, The Buckeye Steel Castings Company.

Hereby enters this disclaimer to that part of the claims in said specification which are in the following words, to wit:

5. A side frame comprising a top member, a bottom member having a webwith an upturned end, and columns connecting said members, the bottom member being straight between the columns andthe columns being of channel formation with their side members directed outwardly and provided with reentrant ribs on their inner faces along their edges which connect with the upturned end of the bottom member web.

said members, the bottom member being straight between the columns and curving upwardly beyond the columns, and upwardly converging inclined hanger elements connecting saidtop and bottom members and spaced outwardly from the columns whereby to define an opening through which a brake beam maybe passed.

7. A side frame comprising a top member, a bottom member, straight columns connecting said members and defining therewith a bolster opening of uniform width, and upwardly converging inclined hanger elements connecting the top and bottom members and spaced longitudinally of the frame from the columns.

8. A car truck side frame including a compression member, a tension member, the ends of said members merging into each other and forming arc-shaped ends for the side frame, columns connecting said members, and hanger elements connecting said members and spaced outwardly from the columns, whereby to define pairs of openings, some of said openings perm'tting the brake beams to be passed therethrough, each of said last mentioned openings being of substantially the same height as the openings beltween columns, and being of only slightly less width than the opening between the co umns.

9. A car truckside frame as claimed in claim 8, including brake hanger brackets projecting laterally from the side frame, and arranged substantially centrally over-the openings defined by the columns and hanger elements.

10. A side frame for car trucks, comprising a top member, a bottom member and vertical members connecting the top and bottom members, the bottom member having its end'portions extending in opposite directions and merging into the ends of the top member, said side frame having a bolster opening between the vertical members, and brake beam openings at opposite sides of the vertical members, each of said openings being substantially equal inarea to each of the other openings, upwardly converging hanger elements connecting the top and bottom members and defining the outer walls of the brake beam openings, and webs extending from the hanger elements to the ends ofthe side frame.

[Ofiieial Gazette April 12,1982] 6. A side frame comprising a top member, a bottom member, columns connecting