US1752741A - Bolster - Google Patents

Description

April 1, 1930. G. T. JOHNSON ET AL BOLSTER Original Filed April 15, 1928 2 Sheets-Sheet 1 Aprill, 1930. I G. T. JoHN aN ET AL 1,752,741

BOLSTER Original-Filed April 15. 1928 2 Sheets-Sheet 2 Patented Apr. 1, 1930 UNITED STATES GI'DBGE '1. JOHNSON AND HARRY W. STERTZBACH, OF COLUMBUS, OHIO, ASSIGNORS PATENT OFFICE TO THE BUCKEYE STEEL OAS'IINGS COMPANY, OF COLUMBUS, OHIO BOLSTEB Original application tiled April 13, 1928, Serial No. 269,692. Divided and this application filed January 3,

1929. Serial Nd. 830,068.

This invention pertains to railway rolling stock, and more particularly to an improvement in railway cars, and the present application is a division of our application Serial No. 269,692, filed April 13, 1928.

This divisional application relates to the construction of heavy capacity cars of the type in which .the bolster is within the body cavity, in contradistinction to cars of the type having the bolster positioned beneath the body. Inside bolsters have heretofore usually consisted of two trusses integrally united at their inner ends by a member of rectangular form placed over the center sill of the car. The rectangular member, unless its entire web is a continuous or uninterrupted plate, or unless it is provided with struts or braces extending between its diagonally opposite corners, does not successfully resist deforma tion in the plane of the rectangle, when there is an unsymmetrical vertical loading condition imposed on the structure as an entirety.

Like in our parent application, it is the object of this invention to overcome this diflioulty, and to produce a bolster of truss form throughout, having the portionimmediately over the center sill region of the car so arranged that diagonal elements are called upon to resist deformation in this part of the bolster, when the body is not uniformly loaded, or the rolling of the car causes the side bearings to come into action.

A further object is to provide a bolster of this character in which the central portion of the same is provided with a substantially conical reinforced portion designed to take strains from substantially all directions.

With the foregoing objects outlined and with other objects in view which will appear as the description proceeds, the invention consists in the novel features hereinafter described in detail, illustrated in the accompanying drawings, and more particularly pointed outin the appended claims.

Referring to the drawings,

Fig. l is a fragmentary viewpartly in elevation and partly in section, of a car body and bolster therein, showing one embodiment of the invention.

Fig. 2 is a bottom view bolster.

Fig. 3 is an elevation of the central portion of the bolster, shown resting on the center clusive, 1 designates the side of a car body consisting of metal plates having a reinforcing channel bar 2 secured along their upper edges, and an angle bar 8 secured along their lower edges, the outer edges of the fioor plates l being also secured to the an le bar 3, as shown, and as will-be understoo The medial portion of the floor plates is supported by the center sill, which consists essentially of a pair of parallel channel bars 5 and a cover plate 6 secured thereon. The bolster 7 forming the main feature of the present invention, rests directly upon the floor plates, with its ends abutting against the oposite sides of the body. This bolster is preferably a one-piece casting formed on; both of its faces with lateral marginal flanges 8, through which rivets, are fastened to secure it firmly to the car sides and floor. On the top of the bolster, at each end thereof, is a central longitudinal rib 9 tov which is secured the lower end of a wing plate 10, which is also secured to the car side by'any suitable means, such as rivets. V

Primarily, the bolsteris acentral vertical web which has in addition .to its marginal flanges 8, other flanges hereinafter referred to. The web, in the interest of lightness, is

of one-half of the not continuous or solid but is provided with openings 11 separated y diagonal struts 12 which join the top and bottom portions of the bolster. These struts are not arranged in fact that a strut 14, of s cial shape, unites.

, bars of the a haphazard manner, but they are specially arranged to minimize the eflect of shifting of the load in the car, and to furnish the requisite stren h. Due to the diagonal arrangement o the struts, most of the openings 11 are of triangular form, but the central penings 13 are of other forms due to the the same ange at the top of the bolster.

Theflange 8 at the bottom of the bolster is provided with widened or projecting portions 18, 19, at four properly spaced points, to provide an ample surface for the attachment of side bearings 15. If the side bearings are to be located near the sides of the car body at the outer side of the truck wheels, they will be attached to the extensions 19. On the other hand, if the are to be located at the inner side of the w eels, and near the central sill, they will be attached to the extensions 18. At this point it ma be noted that the extensions are arranged irectly below the point of joining the struts to the bottom of the bolster, so that any strains imparted to the extensions 18, 19 will be transferred to the struts, and vice versa.

In the form shown in Figs. 4 and 5, the strut 20, which corresponds with the strut 14 in Fig. 3, terminates at its lower portion in diverging webs 21 which are concaved horizonta ly, and these webs are reinforced by longitudinally extending webs 22 and transverse webs 23. Webs 22, as well as the webs 23 diverge downwardly.

It may be also seen from Fig. 5 that the medial portion of the bottom of the bolster is provided with oppositely extendin lugs 24 to accommodate this s ecial form 0 webs at the central portion of t e bolster.

The modification shown in Figs. 6 and 7 differs from that shown in Figs. 4 and 5 in having the lower end of the vertical strut member 25 developed into a conical or helllike web 26 of elli tical form at its base, and the bottom of the olster is widened at 27, to correspond with said elliptical base. An elliptical opening 28 is formed in the bottom of the bolster, and within the bell the strut 25 terminates in a cruciform foot 29.

1. An inside bolster for car bodies of truss form from end to end, and provided at its medial portion with a centrally disposed strut having downwardly diverging portions united with the bottom of the bolster.

2. A one-piece inside bolster for car bodies of truss form from end toend, and provided at its medial portion with a vertical strut having downwardly diver gbranches, said strut oining the top an bottom portions of the bolster.

3. An inside bolster for car bodies having diagonal strut members joining the top an bottom portions of the bolster, a vertical strut having its upper end united with the medial portion of the bolster at the point of meeting of a pair of diagonal struts, the ver tical strut merging at its lower end into diverging portions which connect the vertical strutto the bottom of the bolster.

4. An inside bolster for car bodies of truss form from end to end, and bottom at each side of its medial portion with a pair of transverse extensions adapted for attachment to either inside or outside bearings.

5. In a car construction, a center sill, and a bolster having strut members extending diagonally upward from the sides of the S111 and terminating in a common strut that is united with the top of the bolster.

6. In a car construction, a center sill, and an inside bolster having diagonal strut members extending from the bottom of the bolster, and meeting at the top of the same over the center sill, and a vertical strut member extendindownward from the meeting point of the diagonal strut members, and having its lower end divided into divergin 7. An inside bolster for car bodies, provided at its medial portion with a downwardly flared reinforced annular web.

rovided at its members extending to the bottom of the ho ster.

8. An inside bolster for car bodies, provided at its medial portion with a downwardly flared reinforced. annular web, the bottom of the bolster having an opening leading into the cavity formed by said web.

9. An inside bolster for car bodies, provided at its medial portion with a down- Wardly flared reinforced annular web, the bottom of the bolster having an opening lead ing into the cavity formed by said web, and a cruci-form reinforcement arranged in the cavity and joining the web to the bottom of the bolster.

'From the foregoing it is believed that the 10. A one-piece inside bolster for car 13.9

bodies of truss form, from end to end, and

.provided at its medial portion with a. verti cal leg which branches at its lower end into diverging nortions that unite the vertical of the bolster, the bol-

Images