US667990A - Antifriction side bearing for railway-cars. - Google Patents

Description

m. W390. Patented m. I2, l90l. J. E. uonwoon.

ANTIFRIGTION SIDE BEARING FOR RAILWAY CARS.

(Application filed June 8, 1900.)

(No mam.

f TATES JOHN E. NORXVOOD, OF BALTIMORE, MARYLAND.

thhl'l'lFalUTiQN SEDE BEARlNG FOR HAlLWAY- CARS.

SIE'EGIIEIGATTUN forming part of Letters iEatent No. 667,990, dated February 12, 190 1.

Application filed June 8, 1900- Serial lilo. 19,494. tllo model.)

'0 (tZZ whom it may OOH/66PM.

Be it known that l, JOHN E. NoRwooD, a citizen of the United States, residing at Baltimore, State of Illaryland, have invented certain new and useful Improvements in Antitrietion Side Bearings for Railway-Cars, of which the following is a specification.

My invention relates to antifriction side bearings for railway-cars; and its object is to provide a side bearing which will prevent side motion of the car-body when rounding a curve, which will be kept cleared of dirt, and in which the autifriction-balls will be automatically and positively brought back into a central position whenever the weight of the car-body is taken oft the side bearing on the truck-bolste1x The invention consists in certain constructions, arrangements, and combinations of the parts,\vhicl1 will be hereinafterfully described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which Figure l is an elevation of the truck and body bolsters of a railway-car employing side bearings constructed according to the principles of niyinvention, one side bearing being shown in section and the other in elevation. Fig. 2 is a plan viewof the truck-bolster, the upper ballboxes being removed and one cover-plate K for the separator-frame being also removed. Fig. 3 isa detail plan view of a lower ball-box. Fig. 4 is a detail cross-section of the wearplates and an end elevation of the separator-frame and antifriction-balls. Fig. 5 is a detail plan view of one of the wearplates. Fig. 6 is a detail side view of the centering-wheel. Fig. 7 is a detail edge view of the centering-wheel with a part of the hub broken away to show the centering-spring. S is an enlarged transverse section of one side bearing, and Fig. 9 is a detail view of the cover-plate for the hub of the centering-wheel.

Referring to the drawings, A designates the truck-bolster, B the car-body bolster, and C the center bearing.

The truck-bolster A near each end has secured thereto asegmental box D formed with two parallel curved sockets d, in which are secured by rivets d two wearing-plates E,

formed of hardened steel and each of which is provided with a curved channel 6, angular in crosssection, as shown particularly in Fig. at. The car-body bolster B is also provided with a ball-box D near each end in registry with the box D and provided similarly to the box D with two hardened-steel wearing-plates E, each formed with a curved channel 6, angular in cross-section. Two sets of autifriction-balls F F roll and are confined between the juxtaposed angular curved channels 6 and c, and I provide by this arrangement what I term a four-point bearingthat is to say, each ball has four diametrically-opposed points of contact with the wearingplates E and E and are compelled to move in the direction of curvature only, and hence side-slipping motion of the ear-body when rounding curves is eiitectually prevented.

G designates a ball-separator frame formed with two rows of cageholes g g, which are slightly smaller in diameter than the balls, and the frame Gr fits down over the balls with each ball projecting up through one of the holes, so that all the balls of each set are retained. in the same relative position with respect to one another and move back and forth with the frame. At each end of the separatorframe G are two downwardly-extending V-shaped flanges having inclined side edges and fitting down in the channels 6 6, so that as the frame moves the flanges g in the channels will push all the dirt out of the channels and keep the latter clean. The ball-separator frame G is provided between the two rows of cage-holes g g with a slightlycurved row of apertures h, and underneath the frame in horizontal bearings Z, which are formed between the two curved sockets d of the box D, is journaled a centering-wheel H, having oogteeth 7t on its periphery taking in the said apertures h. This wheel also has a tubular hub 7;, each end of which has one-half cut away, as at j, fora short distance, and thus the cut-away side is a little shorter than the other side, and shoulders 7" are formed on the long side. A torsional helical springJ is within the tubular hub, and each end 70 of this spring is bent laterally and rests upon the shoulders j and extends over into engage ment with the said bearings Z. W ith this arrangement the spring J will be compressed when the wheel H is rotated in either direction by the movement of the separator-frame G, and as soon as the pressure which moves the frame is relieved the spring and wheel will bring the said frame back to its central normal position.

A slotted cover-plate L fits down over the hub of the centering-wheel H and holds it in its bearings Z, and a narrow curved coverplate K has position over the separator-frame G between the two rows 9 g of cage-holes and prevents the frame from jumping out of engagement with the teeth of the wheel when the pressure of the car-body is suddenly relieved.

As shown particularly in Figs. 6 and 7, the centering-wheel H has an opening m, communicating with a slot m in the tubular hub i, through which the bent ends kof the spring pass when the spring is inserted in the hub.

While I have shown each ball-box provided with two wear-plates E and two rows of antifriction-balls, I do not wish to confine myself to such exact arrangement, as it is obvious that one wear-plate and one row of balls may be dispensed with, and I may construct the bearing with a single row of balls.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a side bearing for railway-cars, the combination of the upper and lower ballboxes; curved wear-plates secured in said ball-boxes and formed with V-shaped channels angular in cross-section; antifrictionballs rolling within said channels; and a ballseparator frame interposed between the upper and lower wear-plates and having cageholes in which the balls are received and at its ends downwardly-extending flanges having inclined side edges fitting in the channels of the lower wear-plates whereby to keep said channels clear of dirt.

2. In a side bearing for railway-cars, the combination of the upper and lower ballboxes; autifriction-balls rolling bet ween said boxes; a ball-separator frame interposed between said upper and lower boxes and having cage-holes receiving said balls and a row of apertures h; and a centering-wheel having teeth which take in said apertures.

3. In a side bearing for railway-cars, the combination of the upper and lower ballboxes; antifriction-balls rolling between said boxes; a ball-separator frame interposed between said upper and lower boxes and having cage-holes receiving said balls and a row of apertures g; a centering-wheel having teeth taking in said apertures, and provided with a tubular hub; and a spring in said hub which normally keeps the said frame in central position;

4:. In a side bearing for railway-cars, the combination of the upper and lower ballboxes, the lower ball-box being formed with horizontal bearings; antifriction-balls rolling between said boxes; a ball-separator frame interposed between said upper and lower boxes and formed with cage-holes receiving said balls and a row of apertures; a centeringwheel journaled in the said horizontal bearings and having teeth taking in said apertures and provided with a tubular hub formed with shoulders; and a torsional spring in said hub having its ends in contact with said shoulders and in engagement with the said bearings.

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

JOHN E. NORWOOD. Witnesses:

THOS. O. BAILEY, CHARLES L. VIETSCH.

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