US752508A - Metal bolster - Google Patents

Description

No. 752,508. PATENTED FEB. 16; 1904. A. B. BELLOWS. METAL BOLSTER.

APPLICATION FILED JULY 20, 1903.

N0 MODEL. 2 $HEETS-SHEET l.

INVENTOR I .3 ZQZT 'PATENTED FEB. i6,,1904.

A. BLBELLOWS.

METAL BOLSTBR. APPLICATION FILED JULY 20, 1903 N0 MODEL.

2 SHEETS-SHEET 2.

WITNESSES m: annals PETERS ca. PHOTO-LIT"?- wmkmcmmn, r.

. of the joint of'Fig. 8.

UNITED STATES Patented February 16, 1904.

PATENT OFFICE.

ARTHUR B. BELLOWS, OF PITTSBURG, PENNSYLVANIA. I

METAL BQLSTER.

, SPECIFICATION forming part of Letters Patent No. 752,568, dated February 16, 1904.

Application filed July 20, 1903. Serial N0.166,225. (No model.)

To all whom it may concern:

have invented a new and useful Metal Bolster,

of which the following is a full, clear, and exact description, reference being bad to the ac companying drawings, forming part of thisv specification, in which Figure 1 is a top plan view, partly broken away, showing one form of my improved bol- F1g. 2 1s a side elevation of the same, 4

ster.

Fig. 3' is an end are detail perspective views showing, respectively, the inner box member, the end of the tension-bar, and the outer box member.

Figs. 7 and 8 are detail side elevations show-I ing modified forms of the end 'joint.

Fig. 9' is a vertical cross-section of the end joint of Fig. 7, and Fig. 10is a similar cross-section My invention relates to the class of metali bolsters for trucks and cars, and is designed to afford a light, strong, and cheap device of this character. 5

The invention consists in a peculiar end joint by which the necessity for rivet-holes in the tension member is done away with,

. thereby enabling me to reduce its weight and greatly decrease the amount of labor and workmanship in assembling the parts- It further consists in the construction and arrangement of the end joint, as hereinafter more fully described and claimed.

In the drawings, referring to the form of Figs. 1 to 6, inclusive, I showthe bolster as having a tension member consisting of a bar of rectangular cross-section, having portions 2 2 inclined upwardly in opposite directions from its center, where it. bears against the lower head of an I-beam strut 3. The outer end portions 4 4 of this tension-bar are bent downwardly at anangle to the parts 2 and are held between the correspondingly-inclined faces 5 and 6 of two castings 7 and 8. 'Referring to Figs 4, 5, and 6, the lower box-casting 7 is of general trough form with vertically-projecting sides 9 9, which are preferably ribbed externally, as shown at 10 10, to provide column-guides. The floor 7 of the Y I member.

. ends of the block 11.

box is provided with an upwardly-projecting hollow block 11, whose front face fits the angle of the-tension member, while the rearface 6 fits the downwardly-bent portion 4. The block 11 is preferably cored out for lightness and is of less width than the box, leaving recesses between its ends and the box sides. The box is provided with side rivet-holes 12 and also with rivet-holes l3,extending through the bottom of the casting and through and at right angles to the face 6.

The top casting 8 is of less width than the lower casting and has depending sides 14, which are provided with inwardly-projecting front lugs 15, arranged to engage the front edges of the sides 9 of the lower bar. The rear edges of the sides 14 butt against a crossbar 16 at the rear end of the lower casting. The face 5 of .the upper casting is formed on an inclined partition 17 between the depend- ,ing sides 14 and reinforced by a central web,

between the sides of the upper box and fitting I down over the apex 19 of the bent tension The casting 8 is provided at its rear end with an upwardly-projecting rib 20, which butts against the rear ends of the top members 21. I have shown these top members which form the compression member of the bolster as consisting of two angles whose flanges fit neatly between the sides of the box 7 and the depending sides of the box Sat the These parts are secured together by side rivets, which extend through the sides of the two box-castings and through the flange of the angle held between them.

The webs of the top members 21 are secured to the casting 8 by rivets 22 extending vertically through them. The strut 3 butts against a reinforcing-plate 23, secured to the under face of the angle-webs by rivets, which also extend through the usual center-plate 24. 25 represents the side bearing members, which are secured to the angle-webs.

Instead of using two castings, as in the form above described, I may employ a single casting, which is formed with two faces at an angle to each other to receive the bent end portion of the tension member. Thus in Figs. 7

. ends of the angles fit against the rib 20" on the casting. The single casting in this form amounts practically to a combining of the two castings of the first form into one.

In Figs. 8' and 10 I show a form similar to that of Fig. 7 except that the angular slots in the casting 7 are of suflicient depth to receive both the tension member and the webs of the angles forming the compression members. In this case the angles 21 are slotted and bent down, as shown in Fig. 8. The parts in these figures are designated. as in the first form, adding the exponent a. I

It will be noted that in each case the lines of the centers of gravity of the tension and compression members intersect over the axis of the spring-seat and the center of gravity of the end joint is in the vertical axis of the nest of springs. This avoids the eccentric bending moment in the bolsters members near the ends common in all bolsters of the truss type.

The advantages of my invention result from doing away with rivets which pass through the tension portion of the tension member. The full cross-section of this member is thereby utilized, enabling it to be made of less size and weight and materially reducing the amount of labor in assembling the parts. The bent end of the tension member being held between the parallel surfaces of the box or holder gives a secure grip and does away with a large number of securing-rivets, the only rivets used being to secure the clamping-surfaces together. It also saves thelabor of drilling a large number of holes for these rivets in the tension-bar, it being necessary to drill all such holes on account of the thickness of the bar. The castings may be easily and cheaply made, preferably from steel or malleable iron, and the work of riveting is small. The riveting is all external and may be done by a machine. The eccentric bending moment of other bolsters is avoided.

The compression member may be formed of a channel I-beam or other shape, the form of the casting or castings may be varied, and instead of the casting the box may be formed of a channel-section with pressed shapes or castings, and many other changes may be made in the form and arrangement of the parts without departing from my invention.

1. A metal bolster having a tension member with its outer end portion bent down to form and a tension member having its end portion bent to fit over the apex and secured to place; substantially as described.

4. In a metal bolster, an end joint comprising a box structure, a compression member having vertical legs or flanges fitting the sides of the box, and a tension member having an end portion bent down to form an apex and held within the box; substantially as described.

5. A metal bolster having an upwardly-extending tension-member portion with the end of such portion bent down to form an apex and perforated to receive rivets or holdinglugs, the tension portion of the member adjacent to the apex being imperforate; substantially as described.

6. A metal bolster having a tension member with its ends bent at an angle and held between parallel'surfaces in an end-joint box, said .box having holding devices extending through the bent end portion of the tension member; substantially as described.

7 A metal bolster having an end joint comprising a casting having vertical sides, and an inclined floor, a tension member with a bent end clamped on the floor by an upper parallel surface, and a compression member having vertical flangeainterfitting with the sides of the castings; substantially as described.

8. A metal bolster having an end joint with two interfitting castings having a ridge portion and sides, a tension member having a downwardly-bent end portion arranged to fit on the ridge between the upper and lower castings, and a compression member having vertical flanges arranged to fit the sides of the casting; substantially as described.

9. An end-joint box for bolsters comprising two interfitting castings arranged to hold the end of the tension member between them, said castings having coacting end lugs independent of the tension member to prevent end movement of one relative to the other; substantially as described.

10. A metal bolster'having an end box with a ridge arranged to fit the bent end edge of the tension member, said box having sides, a

compression member having flanges coacting with the sides, and rivets extending through the box sides and said flanges; substantially as described.

11. A metal bolster having tension and compression members, the tension member having sion and compression members; substantially its outer end portion bent down to form an as described. 1o apex with its adjacent intermediate portion; In testimony whereof I have hereunto set, and secured in an end-joint structure, and a my hand.

spring-seat beneath the structure, the vertical ARTHUR B. BELLOWS. axis of the spring-seat passing substantially Witnesses: through the intersection of lines through the GEO. B. BLEMING,

centers of gravity of and parallel to the ten- L. M. REDMAN.

Images