US602910A - Rolled-steel bolster for cars - Google Patents

Description

'(No Model.)

No. 602,910. Patented Apr. 26, 1898.

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UNrrED STATns A'rnivr JOHN M. MARIS, OF CHICAGO, ILLINOIS.

ROLLED-STEEL BOLSTER FOR CARS.

SPECIFICATION forming part of Letters Patent No. 602,910, dated April 26, 1898.

Application filed December 9, 1897. Serial No. 661,252. (No model.)

T0 zr/ZZ 'whom t may concern.-

Be it known that I, JOHN M. MARIS, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have linvented a new and useful Improvement in Rolled-Steel Bolsters for Cars, of which the following is a specification.

My invention relates to steel or metal bolsters for cars formed of rolled beams having an upper and lower flange andan intermediate web and which are given a truss shape by inclining or bending one or both of the flanges at an angle to the other, a wedge or gore shaped piece being cut out of the web at each side of the middle to enable the upper and lower flanges of the beam to be bent or inclined to the required truss shape.

By my :invention instead of cutting out a rectangular area of the web at each end of each beam where the flanges are required to be parallel to each other I simply slit the web and offset it, so that one edge of the slit web will pass the other, the offset portions forming shoulders to abut together, and I then secure the lapped portions of the web together by rivet-s or other suitable devices inserted through the lapped portions of the web. A triangular or gore-shaped area is cut out of the web at each end back of the slitted portion and extending back as far toward the middle of the beam as it is desired to have the upper and lower flanges incline toward each other.

In the accompanying drawings, forming a part of this specification, Figure l is a side elevation of a car-bolster embodying my invention. Fig. 2 is a plan view. Fig. 3 is an enlarged side elevation. Fig. 4 is a cross-section through one of the flange-beams of the bolster on the line et 4 of Fig. 3. Fig. 5 shows in side elevation the blank for forming the truss-shaped beams of the bolster, showing the same after the web is slitted and the triangular area cut out of the same, but before the upper` and lower flanges are bent or inclined toward each other to give the beam its required truss shape.

In the drawings I have illustrated my invention as constructed with the particular style or shape of rolled-steel beams commonly known as deck-beams and in which the upper flange is `flat and the lower one round; but

it will be understood by those skilled in the art that in practicing my invention ordinary I-beanis 0r channel-beams may be used or other shaped beams having upper and lower flan ges and an intermediate web.

In the drawings, A represents the bolster, the same being composed of two flanged beams B B, placed side by side and secured together by suitable castings C C and each having an upper flange b, a lower flange b', and an intermediate web b2.

The upper and lower flanges Z) b" are bent or inclined toward each other, one or both, as may be preferred, from the middle portion of the bolster toward each end, as indicated in the drawings, (the upper and lower flanges being, however, parallel to each other for a short distance, preferably about one foot, at each extreme end,) to give the beam the required truss shape. This is done by forming a slit b3 in the web at each end extending toward the middle, preferably about twelve inches, or as far as the parallel portion of the upper and lower flanges in the finished beam, and by cutting out a triangular or gore-shaped piece b4 from the web at each side of the iniddle of the beam and extending as far as the upper and lower flanges, one or both, are inclined. On each side of the slit b3 the web is offset, forming shoulders b5 and portions be, that lap past each other when the upper and lower flanges of the beam are bent or inclined toward each other to give it the truss shape. After the upper and lower flanges, one or both, are thus bent or inclined toward each other the lapped portions h6 b of the slitted web are secured together by rivets D or other suitable devices inserted through holes drilled in the lapped portions of the web, thus forming and rigidly securing together the upper and lower severed members of the flanged beam. In the bolster A two of these trussshaped rolled-steel flange-beams are secured together side by side by the center plate C and other castings C, one preferably at each end.

The slitted and shouldered portion of the web may be extended back any length desired butI prefer to only extend the slit and shoulders back the length of the parallel portion of the beam at each end and not along the inclined portion of the flange or flanges IOO of the beam, as in practical manufacture it is more convenient to make the offsets and shoulders inthe web parallel to the slit than it would be to forni such offset and shoulders also at an angle to the slit to give the necessary taper or trussshape tothe beam.

In the drawings at Fig. l l have shown my invention as applied both to an upper or body bolster and kto a lower or truck bolster, both, however, being substantially the same in constructiolnexcepting that in the body-bolster the upper iiange of the beams' is straight throughout, the lower flange alone being inclined or bent, `and in the lower or truck lool-k ster both the upper and lower iianges arek preferably bent or inclined.

I claiml. In a car-bolster, a rolled-steelk truss-vL shaped beam having upper and lower iianges and aninterrnediate web, the Web being longitudinally slitted at each end of the beam, and

yprovided with shoulders and offset portions lapping pastv each other, and rivets or other devices inserted through the lapped portions `of said` web for securing the same together,

kthe upper and lower iianges 'of the beam being bent or inclined, one or both, at an angle of said Web for securing the same together,

theL upperand lower ilangesof the beam bef ing bent or inclined, one or both, at an angle Y to each other, and said Web having also a triangular or gore-shaped piece cut out on each side of the middle of the beam to enable said upper andlower flanges to be bent or inclined toward each other, and the slittedand shouldered portion of the web lapped,-substan tially as specified.V i

3. The combination in a car-bolster of a pair i i of truss-shaped rolled-steel beams placed side byside and secured together, and each having upper and lower flanges and an intermef diate Web, the Web having a longitudinal slit at each end and provided with abutting shoulders and offset portions lapping past each other and rivets securing the lapped portions together, the upper and lowerflan ges of each of truss-shaped rolled-steel beams placed side by side and secured together, and each hav-` ing upper and lower iianges and an intermediate web, the Web having a longitudinal slit at each end and provided with abutting shou li ders and offset portions lapping past each vother and rivets securing the latter portions together, the upper and lowerlianges of eachV f beam being bent or inclined, one or both, at

specified;

JOHN M. MARIS.

lVitnesses: n

H. M. MUNDAY, EDMUND ADcocK.

7o ran angle to each other, and said web having also a triangular or goreshaped'piece rcut outy at each side of the middle, substantially as

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