US486568A - B rake-beam - Google Patents

Description

(No Model.)

H. B. ROBIsGHUNG. BRAKE BEAM.

No. 486,568. Patentea Nov. 22, 1892.

' they occur.

UNITED STATES PATENT OFFICE.

HENRY B. ROBISCHUNG, OF KALAMAZOO, MICHIGAN.

BRAKE-BEAM.

SPECIFICATION forming part of Letters Patent No. 486,568, dated November 22, 1892.

Application filed April 2, 1892.

To aZZ whom it may concern:

Be it known that I, H ENRY B. ROBISCHUNG, a citizen of the United States, residing at Kalamazoo, in the county of Kalarnazoo and State of Michigan, have invented certain new and useful Improvements in Brake-Beams; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, Wherein-- Figure 1 is a plan view, partly in section, of a trussed brake-beam embodying my invention. Fig. 2 is an enlarged front elevation of a portion of the compression member. Fig. 3 is an enlarged rear elevation of a portion of the compression member. Fig. 4 is a longitudinal central section of a portion of the compression member on the line r 11', Fig. 2. Fig.5 is a transverse section of the compression member on the line s 8, Fig. 1, the strut being shown inelevation. Fig. 6 is a transverse section of the compression member on the line t t, Fig. 1. Fig. 7 is a transverse section of the compression member on the line w x, Fig. 4; and Fig. 8 is an end view of the compression member.

Like symbols refer to like parts wherever My present invention relates to the construction of trussed brake-beams, and has for its object the production of a beam of the Character specified wherein the metal of the compression member shall be so distributed as to obtain increased strength at the parts of greatest strain with the least available weight of metal and cross-section of the compression member, considered as a whole.

To this end the main features of my invention, broadly stated, may be said to iconsist in vthe arrangement of reinforces in the lines of strain, the general form given to the compression member at different points in its length, and the utilization of malleable or cast steel metal in order to conserve the strength of the compression member at points where the tension and compression members of the structure are united.

I will now proceed to describe my invention more fully, so that others skilled in the art to which it appertains may apply the same.

In the drawings, A iudicates the compres- Serial No. 1:!271522. (No model.)

sion member, B the tension member, and C the strut or post, of a trussed brake-beam supplied with the usual or any approved form of head D.

The Character of the tension member and strut are not material and may be of any ap- .drawings, said sections 3 4 3 of the compression member are cylindrical iu cross-section; but it will be evident to a person skilled in the art that said parts or swells may be of any other desired cross-section which. will adapt them to the purposes specified.

Extending inwardly from the head-swells 3 3 or on the rear face of the section l l of the compression member and so positioned as to resist the strain of the tension-rod B and reinforce the compression member at said points of strain are longitudinal ribs 5, which preferably taper oif and terminate about midway between the center and ends of the compression member, though said ribs 5 may be carried up to within a short distance of the strut-swell 4, if desired.

Owing to the general form given the compression member, as hereinbefore set forth, the same can be most readily produced by casting, and is therefore generally so produced, the subsequent malleableizing of the compression member giving to the beam the resiliency and tensile strength so Very desirable in the trussed beams and especially cambered trussed beams, while the thin ribs and reinforccs enable the thorough malleableization or consequent reinforcementof the compression member at the points of greatest strain Where, owing to the union of the tension and compression members, such beams are usually, as now constructed, necessarily reduoed in strength in proportion to their cross-sectional area.

Having thus descrlbed the nature of my invention, What I claim, and desire to secure by Letters Patent, is-

1. In a trussed beam, the combination, with a tension member and strut, of a malieabieiron compression member having a' iongitndinal tapering rib or ribs extending inwardly from the ends thereof and arranged in the line of strain of the tension member and which terminates short of the middle of said compression member, substantially as and for the purposes specified.

2. In a trussed brake-beam, the combination, with a tension member and strut, of a malleable-iron compression member having hoilow or tubuiar swelis at its ends and Iongitudinai tapering ribs extending inwardly therefrom, substantiaily as and for the purposes specified.

3. In a trussed brake-beam, the combination, With a tension member and strut, of a compression member having a central and end swells, said end swells being hoilo'w'or tubular, and longitndinal reinforce-ribs on its rear face, which extend inwardly from the end swells of said compression member, substantiaily as and for the purposes specitied.

4. A compression member for trussed brakebeams, said member having a central and end sectionsof hollow or tnbnlar form, adapted to receive a strnt and brake-heads, and intermediate sections of I or H Shape in cross' section, snbstantially as and for the purposes specified.

5. A compression member fortrussed brakobeams, said member having a central and end Sections of hoilow or tnbuiar form and intermediate portions of substantially I or H cross-section, the rear face of the said intermediate Sections having ribs or reinforces which extend inwardiy from the hoilow end Sections, substantiaily as and for the purposes specified.

In testimony WhereofI aflix my signatn re, in presence of two witnesses, this 10th day of March, 1892.

HENRY B. ROBISCHUNG.

Witnesses:

E. T. WALKER, E. B. LEIGH.

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