US809768A - Truck-bolster. - Google Patents

Description

PATBNTED JAN. 9, 1906.

J. C. BARBER.

TRUCK BOLSTER.

APPLICATION FILED MAM, 1905.

2 SHEETS-SHEET 1.

PNA@

PATBNTBD JAN. 9, 1906.

J. C. BARBER.

TRUCK BOLSTBR.

APPLICATION FILED MAM, 1905.

2 SHEETS-SHEET '2.

UNITED STATES PATENT OFFICE. V

TRUCK-BOLSTER.

Specification ofV Letters Patent.

Patented Jan. 9, 1906.

Application filed May 4, 1905. Serial No. 258,755.

T0 all whom it 17mg/ concern:

Be it known that I, JOHN C. BARBER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Truck-Bolsters, and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to truck-holsters, and especially to those that are made up chiefly of rolled metal of standard form, and has for its object to improve the same in point of simplicity and efliciency.

To the above ends the invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a plan view of the improved bolster. Fig. 2 is a view, partly in side elevation and partly in vertical section, on the line x2 of Fig. 1. Fig. 3 is a transverse vertical section taken approximately on the irregular line :v3 x3 of Fig. 2. Fig. 4 shows the bolster in end elevation, some parts being sectioned on the line x4 a4 of Fig. 1. Fig. 5 is a vertical longitudinal section through an end portion of the bolster, illustrating slightly-modified construction thereof; and Fig. 6 shows the bolster indicated in Fig. 5 principally in end elevation, but with some parts in vertical section;

As the compression member of the bolster I employ an I-beam 1, and for the tension member thereof I employ a flat bar 2.

In the preferred construction illustrated in Figs. 1 to 4, inclusive, the web portion of the I-beam 1 at its ends is cut away between the flanges of the beam in such manner as to leave inset transversely-extended shoulders 1a and short ribs 1b, which latter project inward from the flanges of said beam, as best shown in Fig. 4.

Riveted, bolted, or otherwise rigidly secured to the ends of the compression member or beam 1 are caps or joint-blocks 3, preferably of malleable iron or cast steel and formed hollow and with internal ribs. These caps 3 fill the spaces left in the ends of the beams 1 by cutting away the web thereof, and they are provided with slightly-upturned web extensions or plates 4, which at their inner ends are notched at 4LL to receive the shoulders 1a, formed at the cut ends of the web of the said beam 1. Preferably the extension-web 4 is .extended at 4b a considerable distance inward of the shoulder 1il and under the web of said beam 1. At their sides the caps 3 are formed with grooves 3a, that receive the ribs 1b, left on the flanges of the compression-beam l. Rivets 5 are passed through the flanges of the beam 1 and through the adjacent verticalwebs ofthe caps 3 to rigidly hold the said parts together, thereby insuring the close engagement between the ribs 1b and grooves 3a. As will hereinafter more clearly appear, the greater part of the shear, due to downward pull on the caps 3, is taken by the ribs 1b, the chief function of the rivets 5 being to hold said ribs in engagement with the grooves 3u. Above the web of the compression-beam 1 the caps 3 have upturned flanges which, as shown, are secured to the flanges of said beam by rivets 6. Also in the construction illustrated the caps 3 are provided with upwardly-projecting stop-lugs 7 and with laterally spaced depending guide,- legs 8. The stop-lugs 7 are adapted to engage with the side frames of the truck to limit the endwise movement of the bolster transversely of the truck, and the guide-legs S are adapted to cooperate with combined roller caps and spring-bases of lateral-motion devices, ap plied substantially as disclosed and broadly claimed in my United States Patent No. 573,636 of date December 22, 1896, entitled Car-truck.

The ends of the tension-bar 2 are passed through suitable seats provided therefor in the caps 3, and the ends are turned upward over the web extensions 4 of said caps, as shown at the left in Fig. 2. Rivets 9 are passed through the upper and lower folds of the end portions of the bar 2 and through the interposed web extensions 4, thereby rigidly uniting said parts.`

Incorporated in the improved truck-bolster I have shown a king-post or strut Vof novel construction, an eflicient form thereof being shown in the drawings Figs. l to 4, inelusive. This king-post is made up of a seat or base-section 10 and a body portion 11, the 'former having a cylindrical depres'sion 12 in its under surface and the latter having a correspondingly-formed upper end portion engaging therewith in such manner that said body portion 11 may be oscillated in apply- IIO ing it in working position. The base member 10 is riveted to the under surface of the central portion of the web of the compression-beam 1 and is provided with a king-bolt seat 13, that registers with a perforation 13L in the web of the beam 1 and with a perforation 13b in the upper portion of the said bodysection 11.

With the construction described it is possible to secure the ends of the tension-bar 2 to the caps 3 and to the ends of the compressionbeam 1 before applying the king post or strut member 11 in working position. Then the said member 1 l may be forced into position by a lateral oscillatory movement in a plane longitudinally of the members 1 and 2, and under such movement the tension member 2 will be drawn taut. The friction between the lower end of the post member 11 and the tension-bar 2 will under normal conditions be very great and will be further increased under the weight of the load on the bolster. Hence it is not throught that rivets or other devices will 'be found necessary to hold the said member 11 against pivotal movement and in working position. Such devices may, however, be provided, if found necessary or thought desirable.

The bolster described is capable of being very quickly put together and may be constructed at comparatively small cost. Furthermore, it affords a maximum of strength with a minimum of metal and provides an arrangement in which the rivets used to connect the v several parts of the device are not subjected to intense shearing strains, the said shear being taken chiefly by other parts. For instance, under the weight of the load on the central portion of the bolster, which will of course be transmitted thereto through a suitable center-bearing, (not shown) the shearing strain is between the shoulder 1a and the seat 41L and between the ribs 1b and seats 3a. The ends of the tension-bar 2 are so bent about the web extensions 4 of the caps 3 that the rivets 9 are required to resist but very slight shearing strains.

In the modified construction illustrated in Figs. 5 and 6 the web of the compressionbeam 1 instead of being entirely cut away is slit inward of the side flanges, so as to leave the ribs 1b, and this slit portion 1C is turned upward at an angle, as indicated in Fig. 5. Also in this construction the web extension 4 has its shoulder 4@L at its eXtreme upper end, so that it engages with the upper edge of the upturned web portion 1C. Also the rivets 9 in this arrangement are passed through both folds of the tension-bar2 and through the upturned web portion 1c and web extension 4. Furthermore, as shown, the caps 3 at their inner end are provided with upper and lower flanges 14, through which and said bar 2 rivets 15 are passed. Otherwise than described the construction illustrated in Figs. 5 and 6 is substantially the same as that illustrated in Figs. 1 to 4, inclusive. The numeral 16 indicates as an entirety a side bearing, which is applied to the web of the compression-beam 1, but which, however, forms no part of this invention.

From what has been said it will be understood that the bolster described is capable of modifications other than those specifically noted, all within'the scope of my invention as herein set forth and claimed.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is as follows:

1. In a trussed truck-bolster, the combination with a flanged compression member having its web cut at the ends thereof, leaving the ribs 1b, of caps or joint-blocks reacting against the end portions of the web of said compression member, and having grooves in their sides receiving said ribs 1b, and thereby interlocking the said parts, and a tension-bar having its ends benty and interlocked with the said caps or blocks, substantially as described.

2. In a trussed truck-bolster, the combination with tension and compression members rigidly attached at their ends, of a kingpost or strut interposed between the intermediate portions of said compression and tension members, and mounted for oscillatory movement to and from operative position, substantially as described.

3. In a trussed truck-bolster, the combination with tension and compression members, united at their ends, of a two-part kingpost or strut interposed between the intermediate portions of said two members, and made up of two parts, one being rigidly secured to said compression member, and the IOO other having a pivotal movement into and out of engagement with said tension member, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN C. BARBER.

Witnesses L. W. BARBER, A. M. LOVE.

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