US799330A - Car-bolster. - Google Patents

Description

P-ATENTED SEPT. l2, 1.905.

No.l 799,330.

J. GREEN. UAR BOLSTER.. APFLIGATION FILED JAN. 29l 1904.

Fig. 4.

Attorneys.

UNITED ETATS PATENT OFFICE.

JOHN GREEN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO IN H. BENNERS,

OF ELIZABETH, NEW JERSEY. 4

CAR-BOLSTER.

Specification of Letters Patent.

Patented Sept. 12, 1905.

Application led January 29, 1904. Serial No. 191,125.

To all whom it may concern:

Be itlmown that I, JOHN GREEN, a citizen of the United States, and a resident of the city of Louis and State of Missouri, have invented a new and useful improvement in Car-Bolsters, of which the following is a specification.

My invention relates to car-holsters, either truck-holsters or body-holsters; and its prin-l cipal objects are to cheapen the cost of manuoi' holsters of given strength, to provide a bolster that may be made of cast-steel with a greater economy in pattern material and core materiai, to provide a bolster of such construction that the pattern will be easy to draw from the mold and may be drawn without danger of injuring the mold, to provide a bolster that may be used withtransom-trucks,

A with a resulting economy of both material and 2o space, and otherobjects hereinafter more fully appearing.

My invention consists in the parts and in the arrangements and combinations of parts hereinafter described and claimed.

In the accompanying drawings, forming a part of this specification,and wherein like symbols refer to like parts wherever they occur, Figure l is a fragmentary sectional view through atruck and car, showing my improved bolster applied both as a truck-bolster and body-bolster. Fig. 2 is a section on the line 2 2 of Fig. 1, omitting the details of the truck. 3 is a section ou the line 3 3 of Fig, 1. Fig. 4 is a section similar to that of Fig. 2, showing the bolster as used with a transomtruck; and Fig. 5 is a plan view of a truckbolster. f

My improved bolster consists of a wide and comparatively thin top 'member 1, a narrow and comparatively thick bottom member 2, and substantially egcs-shaped members 3 4f, which are externally convex at their upper portions and externally concave at their lower portions, the curves mergingeither with each other or with a substantially straight portion connecting them. Thesemembers have this form throughout the length of the bolster, being modified in proportion only from the wide and deep central portion to the narrower and shaliower end portions. The bolster thushas asubstantiallytriangular section. In the case of a truck-bolster the section at the extreme ends is substantially rectangular in order to provide the necessary column-guides 5 6, which are of facture of car-holsters, to reduce the weightA the usual form. The top member of the truckbolster is provided with the usual center plate 7 and side bearings 8 9. From the center of the center plate 7 a king-pin post 10 extends from the top member 1 down to the bottom member 2. The king-pin post has an outer diameter equal to or greater than the width ofthe bottom member. By this construction the king-pin post serves as a strut to transmit the load to the bottommember and distribute it over the entire width of the latter. The bottom member'of the body-bolster is provided with the usual side bearings 11 12 and center bearing 13. At the center it is provided with a kingpin post 14, extending from the top member 1 to the bottom member 2. vThe king-pin post thus serves 'as a strut in .the body-bolster as well as in' the truck-bolster. As the bolster is an integral cast-steel article, the top members and the side members have a plurality of holes 15 produced by the core supporting members of the mold and through which the core may be removed from the casting.

In combination with the cross-tie trucks, as

illustrated in'Figs. 1 to 3,k the truck-bolster extends below the cross-ties 16 17. The bol- ,ster being narrow at the bottom, it may extend between the cross-ties, and thus may be made deeper without raising the center plate. As the metal is more efficient in resisting iiexure the farther from the axis it is placed, it follows that less metal is required vto produce a bolster of given strength. The same advantage obtains inthe use of the truckbolster in transom-trucks, as illustrated in Fig. 4. The body-bolster also has peculiar advantages when used with transom-trucks. Because of the narrow bottom member there is suncient room for the lateral movement of the body-bolster between the transoms 18 19. Hence it is unnecessary to raise the center plate and side bearings of the truck-bolster above the transoms, and therefore the carbody may lower, space being saved vertically. Car-holsters are subjected to horizontal as well as vertical forces, and they are in substantially the plane of the top member. The holsters illustrated have improved eiiiciency in taking ca re of the horizontal strain, for the side members, externally convex at their upper portion, provide metal at the point where it is most ciiicient for this purpose. l

As the bolster converges fromthe top member to the bottom member, it'necessarily follows that the pattern thereof will draw easily from the mold and the vdanger of injuring the mold'in drawing the pattern is lessened.

;Obvi o'usly my improved bolster Vadmits of considerable modilication within the scope of my invention, and therefore I do-not wish to be limited to the specific construction shown and described.

What I claim` as my invention, and desire to secure by Letters Patent, is

1. An integral car-bolster comprising a top member, a bottom member, and' side members connecting the top and bottom members to form a substantially triangular cross-section.

2. An integral car-bolster comprising a wide top member, a narrow bottom member, and

side members converging from the sides of said topme b er down to said bottom member.

3. A car-b lstbr comprising. a top member, a bottom member, and side members connecting said top and bottommembers, said side members being externally convex at their upper portions and externally concave at their lower portions. r

4. A car-bolster comprising a top member,

a bottom member, and substantially ogeeshaped'side members connecting said top and bottom members.I

5. A car-bolster comprising a top member,

a bottom member, downwardly-convergjngV side members connecting said top and bottom members, and a king-pin post extending from said top member to said bottom member and arranged to distribute load over the entire width of said bottommember.

6. A car-bolster comprising awide top member and side members connected to the sides of said top members and downwardly converging to form a substantially triangular crossl section. A A

7 The combination of a oar-truck, 'having separated cross-ties, and a bolster having a wide top member, a narrow bottom member and downwardly-converging side members connecting said top and bottom members, 'said bolster being narrow enough at its lower edge to enter between said cross-ties.

8. The combination of a car-truck, transoms therein, a truck-bolster of substantially triangular cross-section the middle lower portions of said bolster extending between and 10. In a bolster, the combination withI a topl plate at throughout the greater portion of its length, a bottom plate inclining or curving upward from its center toward the ends of the top plate, and inclined webs connecting l side edges of the top and bottom plates.

11. A bolster of one integral casting, comprising a top plate, a bottom plate, inclined side webs connecting them, enlarged ribbed ends on the bolster having recesses in their sides, integral center and end bearings on the top plate, and a hollow post in the center of center bearing and depending therefrom.

In testimony whereof I have signed my name4 l to this speciication in the presence of two subscribing witnesses TJOHN -GREEN. Witnessesr. T. W. Remi/inns, FRED F.. RnIsN'ER.

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