US1637970A - Car-truck side frame - Google Patents

Description

Aug. 2 1927.

H. W. STERTZBACH ET AL CAR TRUCK SIDE FRAME Filed March l1. 1925 2 Sheets-Sheet l ation was Aug. 2 1927.

H. W. STERTZBACH ET AL GAR TRUCK SIDE FRAME Filed Marchll. 1925 2 Sheets-Sheet 2 @H01 new Patented Aug. 2, 1927.

UNITED STATES PATENT OFFICE.

HARRY: WALTER STERTZBACH AND MERRITT RASMUS HANSEN, OF COLUMBUS, OHIO, ASSIGNOBS TO THE BUCKEYE STEEL CASTINGS COMPANY, OF COLUMBUS, OHIO.

CAR-TRUCK SIDE IFRAME.

Application led March 11, 1925. Seria1.No. 14,782.

This invention relates to car truck side frames of that type in which the entire frame is cast as 'a single integral structure exemplified in Letters Patent No. 1,523,793, granted to us January th, 1925, and No. 1,378,794 granted to George T. Johnson and Harry W. Stertzbach May 17th, 1921, and has special reference to the formation of the connection between the spring seat and the tension member. In the side frames to which this invention is applied, the transverse horizontal webs of the tension members form a continuous element with the top plate of the spring seat, which top plate is relatively widened to properly support the superimposed springs. The wldened portion of the plate is a part ofthe tension member and, due to bending, it is subjected to localized stress at the ends of the spring seat. This widened plate is most effectively utilized'by keeping it alined with the web of the tension member. One ob]ect of the present invention is to provide a con- -struction which will effectively withstand this localized tensile stress.

In `the manufacture of'steel castings it is highly desirable to avoid enlargement or so-'called wads of metal that are caused by two or more members meetin on a common line or ata' common point. T iese wads necessitate 'the yuse of chills to prevent shrinkage which adversely affect the soundness of the casting. Another object of the invention, therefore, is to avoid the formation of wads in the casting. The invention willbe hereinafterA fully described with reference to the accompanying drawing, and consists in certain novel features which will be particularly pointed out in the appended claims.

In the drawing, Figure 1 is a side elevation of so much of a side frame asis necessary to an understanding of the invention;

Figure 2 is a top plan view of the same;

Figure 3 is a transverse section on the line 3-'3 of Fig. 1;

Figure 4 is a view similar to Figure. 3 but showing a slightly different embodiment of the invention;

Figure 5 is a bottom plan view showing a form diifering from the forms shown in the receding igures;

Figure 6 is a horizontal section taken in the planel indicated by the line 6-6 in Fig'- ure 1 but showing the construction indicated in Figure 5.

Figure 7 is a transverse section corresponding to Figure 3 but showing the form of Figure 5;

Figure 8 is a transverse section showing a form diierinfr somewhat from Figure 7.

In the drawing, 1 designates the tension member, 2 the spring seat, and 3 the column at the side of the spring seat. As indicated at 4, the top plate or shelf of the spring seat is expanded laterally or widened to furnish an adequate support for the springs, and the end portions of the shelf gradually decrease in width and merge into the top plate or web of the tension member approximately at the base ot' the column. In casting the frame, wads tend to form at the junction of' the column with the springseat and the tension member at the point marked 5 in Figs. 1 and 3. 'With the ordinary construction, these wads extend across the entire width of the spring seat and also extend longitudinally of the frame. lNe form an opening 6 in the web of the column at the lower end thereof and thereby eliminate the wad to the extent of the total width of the lowerend of the opening, and the outstanding ribs or flanges 7 are provided on the sides ofthe column to furnish strength to meet transverse forces applied to thel column. We -also arrange the depending side walls 8 of the spring seat in outwardly odset-relation thereby rendering the'longitudinal extent of the wad negligible., The lower edges of the side walls 8 are preferably connected by a horizontal web 9 forming a box yunder the Spring seat which may have a trapezoidal or other cross section, as long as theoii'set relation of the walls to the sides of the column is maintained. The bottom connecting web may even be omitted. This disposition of the depending side walls reduces'thc overhang of the shelf so that it may resist the tend- 'ency to c url upward under load. It also makes it possible to omit the outstanding flanges 7 when desired, the rqusite'strcnath in the column beingmaintaind by reducing the width of the opening `Gand forming integral ribs 10, as shown inV Fig. 4'. Illasmuch asthe wad is most injurious atthe point' where the spring seat andthe trans'- verse .web 0f the column unite, the'value of the offset formation lessens toward the ends of the frame and it becomes to lconinverted channel form of the ber, as indicated at l1.

' In Figs. 5 to 7 inclusive, the extreme width of the column 3 at its lower end is somewhat greater than the width of the tension member. The side walls of the box under the spring seat'are vertical but the side walls 12 of the column are offset relative thereto so that the longitudinal wad is very materially reduced, the transverse wad being minimized by the provision of the opening 6.v In Fig. 7, the opening 6, is less 'than the full width of the column while in Fig. 8 the opening is as wide as the box and the increased width of the column takes the form of external ribs 13 which strengthen the web 4 of the spring seat.

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

1. A cast side frame for car trucks including a tension member, a ispring seat merging into the tension member, a column rising vertically from the spring seat at the junction of the same ywith the tension member, and longitudinally extending depending side walls on the bottom of the spring seat, said walls being oli'set relativeA to the sides of the column.

2. A cast side frame` for car trucks including a tension member the lower end of which is of inverted channel formation in cross section, a spring seat having a longitudinal box or channel section `on its under side merging at its ends into the channel of the tension member, and a column rising vertically from the spring seat at the junction of the same with the tension member, the sides of the column being otl'set relative to the sides of the box or channel section and there being an opening through thecolumn immediately at the spring seat.

3. A cast side .frame for car trucks including a tension member, a. vertical column, and a spring seat merging into the tension member at the base of the column, there being an opening through the column at the spring seat and the spring seat having a longitudinal box or channel section on its under side,

the side Walls of the box or channel section having their upper edges offset relative to the sides of the column.

In testimony whereof, we have signed this specification. A

HARRY WALTER STERTZBACH. MERRITT RASMUS HANSEN.

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