US550906A - Car-bolster - Google Patents

Description

(No Model.) 2 Sheets$heet 1.

W. CASE.

GAR BOLSTER. No. 550,906. Patented Dec. 3, 1895.

(No Model.) 2 Sheets-Sheet '2.

.W. CASE. GAR BOLSTEB.

No. 550,906. Patented ec. 3, 1895.

I I I N I yew ANDREW B.GRMIAM PHO'TO-LITKQWASHINGI'ON. D.C.

UNITED STATES- PATENT OFFICE.

IVILLIAM CASE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE NATIONAL MALLEABLE CASTINGS COMPANY, OF CLEVELAND, OHIO.

CAR-BOLSTER.

SPECIFICATION forming part of Letters Patent No. 550,906, dated December 3, 1895.

Application filed February 5, 1895. Serial No. 537,357. (No model.)

To all whom it may concern:

Be it known that I, \VILLIAM CASE, of Chicago, Illinois, have invented certain new and useful Improvements in Car Bolsters, of which the following is a specification.

The object of my invention is to provide a simple, economical, and efficient car-bolster; and the invention consists in the features and combinations hereinafter described and claimed.

In the drawings, Figure 1 is a plan view of the bolster and other parts; Fig. 2, a side elevation of the same; Fig. 3, an enlarged sectional elevation taken on line 3 of Figs. 2 and 4; Fig. 4, a horizontal sectional view of a portion of the bolster, taken on line 4 of Fig. 3; and Fig. 5, details of parts hereinafter described.

In the usual forms of car-bolsters that are constructed with a body portion having permanent or rigid side-bearing portions the whole being so constructed and arranged with regard to the other parts of the car that the car rests normally upon the center bearing and seat of the bolster, leaving generally a space of from three-quarters of an inch to an inch between the side-bearing posts and the upper portion of the car, so that if the car be heavily loaded-enough to deflect the body portion of the bolster-it will strike these side-bearing seats and a portion of the Weight be sustained thereon. The disadvantages of this construction are that in turning a sharp curve at any speed or any curve at a high rate of speed there is danger of derailing the car, from the fact that the bolster is apt to be held rigidly with the car and not allow the truck to turn. In order to overcome some of the disadvantages when the bolster has become flexed, a set of plates have been inter-- posed on the center seat in order to raise it back to its normal position. This is expensive and not always satisfactory, from the fact that it is difficult to obtain the proper amount of rise. My invention, therefore, is

intended to overcome all these objections by providing a bolster having a pocket or recess to receive the side bearings and other parts hereinafter described.

In constructing my improved bolster I use a bolster Ain this instance preferably made of one integral casting, but which can be of any of the usual formsand provide it with a center-bearing seat a, so that the usual centerbearing may be affixed in any desired manner. I provide it with side portions B B, havingpockets to receive the bearings proper, which are constructed as follows: Inserted in the usual pockets are tension-springs C, adapted to support a platen D, which is provided with an internal threaded opening. Engaging this threaded opening of the platen is the bearing portion proper E, which has a cylindrical threaded portion 6, that enters the threaded opening, while the upper portion E is adapted to form the bearing and be contacted by the upper-bearing seats of the car proper. By providing the platen and the bearing with threaded parts itwill be seen that the relation between the spring and the seat may be changed to any desired distance, so that the upper face of the bearing may be brought within certain limits as high or as low as desired.

In order to prevent the bearing from turning, I prefer to make it of the general shape shown in Fig. 4Ethat is, approximately a square, but having round corners-so that when the bearing is in its pocket it cannot turn in any manner to disturb the adjustment or relation of the antifriction rolls hereinafter described, and, further, to prevent tampering by outsiders with this adj ustment unless more than ordinary means are used. In order to minimize the friction of the engaging partsthat is, the upper side bearing of the car and the bearing of the bolster-I prefer to make the side bearing E hollow and with a U shaped recess e, adapted to receive and form a chamber for a short cylindrical shaft G. Mounted on this shaft'is a hollow cylindrical roll H, which leaves an annular chamber h between it and the cylinder and shaft. In this annular chamber are a series of small antifriction-rolls h, so that the shaft itself, as a general thing, remains stationary, while the roll revolves on these small antifriction-rolls when the bearing portions are in engagement with each other and the car is going around a curve or coming back into a straight line.

The advantages of my improved bolster and its adjustable side bearing are, first, that it furnishes a yielding side and bearing seat to prevent a rigid engagement with the side bearings of the car, which ordinarily might cause the derailing of a train; second, this tension yielding side bearing is made adj ustable and allows a deflection of the center member orbody portion; third, that the mak ing of the bolster vdth a pocket to receive the side bearings permits an interchangeability, as it were, of the sidebearingsthat is, arigid side bearing can be used or a plain adjustable bearing or a railway-bearing or a plain yielding bearing, or, as shown and described, it may be provided with a roller, antifriction, adjustable, and yielding side bearing.

In describing my invention I have not entered into any minute description of the bolster proper, as such structures are well known to those skilled in the art and do not form a material or novel part of my invention; and while I have entered more or less minutely into the details of my invention and described it as being embodied in precise forms, I do not desire to be limited thereto unduly, any more than is pointed out in the claims. On

the contrary, I contemplate all proper changes in form, construction, and arrangement, the omission of parts, and substitution of equivalents, as circumstances may suggest or necessity render expedient.

I claim- 1. A car bolster, provided with pockets at each side adapted to receive side bearings, and yielding adjustable side bearings removably secured to such pockets, substantially as described.

2. A car bolster, provided, with pockeis adapted to receive side bearings, and antifriction adjustable yielding side bearings removably secured in such pockets, substantially as described.

3. A car bolster, provided with pockets adapted to receive side bearings, a yielding tension spring in such pockets, a platen resting on such spring and provided with a threaded portion, and a side bearing provided with a threaded portion engaging with the threaded opening of such platen so that the relation between thetwo may be adjusted, substantially as described.

4. A car bolster, provided with pockets at each side to receive side bearings, a spring or springs in such pocket to support the side bearing in a yielding manner, a platen on such spring or springs provided with a threaded opening to receive a side bearing, an antifriction side bearing provided with a threaded portion engaging the platen so that the relation between the two may be changed as desired, substantially as described.

\VILLIAM CASE. \Vitnesses EPHRAIM BANNING, THOMAS B. McGREGoR.

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