US392739A - Bolster for car-trucks - Google Patents

Description

(No Model.)

H. LORIING.

BOLSTER-FOR GAR TRUCKS.

No. 392,739. ,Patented Nov. 1s, 1888.

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HARRISON LORING, OF BOSTON, MASSACHUSETTS.

BOLSTER FOR CARVFRUCKS.

SPECIFICATION forming part of Letters Patent No. 392,739, dated November 13, IESS.

Application filed February 1, 188B. Serial No. 262,620. (No model.)

To @ZZ whom, it may conceive.-

Be it known that I, Hnnnrson Loraine, of Boston, county of Suffolk, and State of Massachusetts, have invented an Improvement in Bolsters for Gar-Trucks,of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to metallic bolsters employed in the construction of car-trucks, substantially such as shown and described in uUnited States Patents Nos. 361, S45 and 361, 846, dated April 26, 1887.

The bolsters shown and described in the patents referred to are made of sheet-steel, preferably about thrce-eighths of an inch in thickness,which is bentinto substantially n shape.

Bractical experience has demonstrated that a bolster composed of sheet-steel of substantially the thickness referred to and strengthened by angle-irons of substantially the same shape as the bolster is not sufficiently strong to sustain an excessive load. This defect might bc overcome by increasing the thickness of the sheet-steel from which the bolster is made; but this would add materially to the cost of the bolster and therefore to the car-truck of which it forms a part.

It is the object of this invention to materially strengthen the bolster,so that it may sustain a very heavy load,without materially increasing` the cost of the same.

I accomplish my object by iirst bending inwardly the substantially vertical sides of the n-shaped bolster, so that the said inwardlybent portions lie substantially parallel with the top of the bolster, and with the bolster so bent I employ two or more rigid or unyielding braces, each provided, preferably,with lips to engage the inturned edges of the bolster, as will be hereinafter described.

My invention therefore consists, essentially, in a metallic bolster having its sides provided with inturned iianges combined with internal rigid braces connected thereto and supporting the said bolster, substantially as will be described.

Other features of my invention will be pointed out in the claims at the end of this specification.

Figure l is a side elevation of a bolster embodying my invention; Fig. 2, an under side View ofthe bolster shown in Fig. l; Fig. 3, a side view of a portion of the bolster shown in Fig. l, on an enlarged scale; and Fig. 4, an enlarged sectional view of the bolster on line w m, Fig. 1.

v The bolster a, of sheet metal, preferably steel, has its sides a a2 for a portion of their width bent inwardly toward the center of the bolster to form flanges b Z. Each iiangebb near the ends of the bolster is reduced or made smaller, as at b2, (see Fig. 2,) to enable the bolster to be .properly supported upon the bolster-sustaining springs of the car-truck shown in the patents referred to.

The bolster c, as shown in Fig. d, is substantially oblong in cross-section, and it is strengthcned in accordance with my invention by substantially oblong unyielding braces c, preferably two or more, on each side ofthe bolstercenter. Each oblong brace cis composed, preferably, of malleable cast metal iianged at its outer edges or made angular, and each brace has lips, as c3, against which abut the inturned flanged edges b Z) of the bolster. The braces are preferably left open at their centers for lightness. The lips referred to are originally cast, as shown, at the right of Fig. 4; but when the iianged edges b b are in place the said lips are bent up,as at the left of Fig. 4, to thus aid in holding the flanges firmly in place. These angle-braces are riveted in place within the bent bolster-shell by rivets, as at c".

A bolster constructed as above described is enabled to sustain a very heavy load without buckling or otherwise being injured.

The cost of my improved bolster is not materially greater than that of the bolster shown in the patents referred to; but in my bolster I estimate that cach additional pound of metal added enables the bolster to support about one ton additional load or weight. I prefer to employ the lips c on the brace; but, if desired, the same may be omitted and the inturned flanges b b be riveted to the said flanges of the braces.

I claiml. A metallic bolster having its sides provided with inturned flanges, as b b, combined with internal rigid braces connected thereto and supporting the said bolster, substantially as described.

2. A. metallic bolster having its sides pro- IOO In testimony whereof I have signed my nme Io to this specification in the presence of two subscribing witnesses.

vided with inturned flanges, combined with y rigid braces having lips to hold the edges of the flanges, substantially as described.

3. A metallic bolster having its sides provided with inturned flanges, combined with rigid angle-braces extending entirely across HARRI'SON LORING.

the bolster from side to side near both upper l Witnesses: and lower sides of the bolster, substantially as G. W. GREGORY, described. l J. C. SEARS.

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