US1617811A - Bolster spring seat stop - Google Patents

Description

Feb. l5, 1927.

v v C. F. HUNTOON 'l BoLsTER sPRINs SEAT STOP Filed Oct. l2, 1925 Patented Feb. 15, 1927.

UNITED STATES PATENT OFFICE..

BOLSTER SPRING SEAT STOP.

Application filed October 12, 1925. Serial No. 62,050.

The invention relates to improvements in truck belsters ot' the type shown in Patent No. 1,210,478, January 2. 1917, and more particularly to the manner ot holding the spring seat block to prevent the same from shifting and breaking the cast end guides.'

It is chiefly characterized by providing a stop or lug secured to the top wall of the inverted spring` seat pocket, which lug is engaged by a suitable recess in the upper surface of the spring block.V The spring block, in other respects, fits loosely in the pocket.

It has been found that in many instances in the present practice of loosely fitting a wooden or cast iron spring block into the wedge-shaped pockets in the ends of the bolster, the breakage of the end castings has been due to lateral shifting of the spring block under the strain of the lurching and side swaying` of the car body.

It would be manifestly impractical to secure the spring block in any ordinary manner to the end castings against lateral shifting. but it is entirely practical to attach a stop against such shifting to the upper wall of the pocket because the upper wall is furnished by the truss members which are made of rolled steel material.

An object of this invention is to provide such a stop which is simple and substantial and will not add materially to the cost of the bolster.

Further objects and advantages will appear in the following description with reference to the accompanying drawings, in which an illustrative embodiment of this invention is shown.

In the drawings:

Figure 1 is an elevation of the truck bolster.

Fig. 2 is an inverted' plan view.

Fig. 8 is a central section of Fig. 1.

Fig. 4 is a perspective view of the spring block.

Fig. 5 shows the stop member.

In a trussed truck bolster the upper member is an inverted channel, bowed upward in the center and having the ends bent upwardly to join the ends of the inversely bent flat lower member. The lower member is thickened at the ends to provide a shoulder for abutting with the outer ends of the web of the upper member to prevent shearing the rivets, of which there are usually three at frames each end. and which fasten the ends of the upper and lower members together. A cast iron end member is ordinarily used to enclose the ends of the truss for reinforcing it and providing lateral wearing and guide surfaces for engaging with the truck side and for providing an inverted pocket, formed by the walls of the end member and the under surface of the lower truss member, into which is loosely fitted a cast iron or wooden spring seat block. Y

In the present improvement a cylindrical stop member, having a concentric counterbored hole, is placed under the middle rivet head with the head fitting in the counterbored recess. This provides a shouldered projection secured to the upper surface of the pocket.

The spring block is provided with a recess in its upper surfacewhich closely engages the stop member, while the remaining lateral surfaces of the spring block clear the adjacent surfaces of the pocket. i

Referring in detail to the drawings, the truck bolster 1 receives, with limitedA pivoting, kthe center of the car bolster, which supports the end of the car. on thecentrally located member 2. The ends 3 of the truck bolster 1 engage with openings in the truck side. frame and rest on the car springs 4, and side rocking of the car is stopped by the side bearings 21. This is more fully illustrated in my Patent No. 1,176,063, grant-ed March 21, 1916.

The upper truss member 5 is bowed upwardly in the center and the ends 6 are upturned to rest on the ends 7 of the flat lower truss member 8. The medial portions of 5 and 8 are spaced by the strut 9 and the ends 6 and 7 are secured together by the rivets 10, of which there are usually three, spaced as shown.

The inverted spring pocket 11 is formed at the ends of the bolster 1 by means of the end casting 12, which laterally encloses the said ends and is secured to the marginal fianges 13 of the upper truss member 5 by the rivets 14. Side movement of the bolster 1 is stopped by the vertical shoulders 15 formed on the end member 12, which abut the inner flanges of the openings in the truck frame.

Thus it will be seen that the pocket 11 is necessarily wedge-shapedin transverse section and the upper wall 16 formed by the Cil lower surface of the truss member 8 slopes inwardly. The spring seat block 17 fits loosely in the pocket 11 and is recessed as at 18 to clear other lateral surfaces.

To prevent lateral shifting, l provide a recess 19 in the upper surface of the spring block 17 which is adapted to closely engage with the stop 2O secured to the rolled steel member 8.

The stop Q0 is cylindrical with a central hole 21 having' the concentric recess 22 and is placed under the head of the middle truss rivet 10', with the rivet head Q3 countersunk in the recess 22.

Thus the improvement is accomplished by the addition of one simple member Q0, and

a rivet 10, which is already in the bolster, is used for securingthe stop in place.

It is manifest that with the car in motion, sudden and severe shocks are received by the spring blocks, as for instance in a side lurch beingstopped by the side bearing 21. @wing to the slope of the top 16 of the pocket 11, considerable force is developed to drive the wedge-shaped spring block 17 outwardly against the end wall of the member 12, which may easily be sufficientto break the same. l

It can also be seen that forces are constantly being developed for shifting` the spring` block 17 about in the pocket 11, and that the shifting is now stopped in a very simple and efficient manner without weakening` the spring block.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that the construction shownl may be altered without departing from the spirit of this invention as defined by the following claims.

I claim:

1. In a truck bolster having,` an inverted pocket formed at each end thereof, a cylin drical member secured to the upper wall of the pocket forming a shouldered projection, a spring seat block loosely fitting' in said pocket and having, a recess adapted to closely engage with said member.

2. In combination, in a trussed truck bolster havinga channel-shaped upper truss member hafiirq upturned ends. a lower flat truss member joined at the ends to the web at the ends of the upper truss member by means of rivets. and end reinforcing member secured over the joined ends of the truss 3' members, forming," at each end an inverted pocket with an inwardly sloping top Wall in which are located the heads of said rivets, a recessed disk member under the heads of one centrally located rivet, and a spring block fittingl loosely in said pocket and having a recess adapted to engage said disk member.

3.111 a truck bolster having inverted pockets having inwardly slopingtop walls and a rivet head located therein, a recessed cylindrical member under the rivet head and receivingthe head in the said recess and forming a shouldered projection, and a spring` block loosely fitting in the said pocket and having` a recess engaging;` said shouldered projection.

Signed at South Pasadena, California, this 3rd day of September, 1925.

CHARLES F. HUNTOON.

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