US1801121A - Lateral-motion roller assembly - Google Patents

Description

April 14, 1931- T. H. sYMlNGToN LATERAL MOTION ROLLER ASSEMBLY Filed July 12. 1928 ll l I n f, 1 f I l l l l l l l 1 l 1 l 1 1 I f l l l Patented Apr. 14, y1931 UNITED STATES PATENT OFFICE THOMAS H. SYMINGTON, BALTIMORE, MARYLAND, ASSIGNOR TO T. H. SYMINGTON i `8c SON, IN C., 0F BALTIMORE, MARYLAND, A CORPORATION OF MARYLAND I LATERAL-MOTION ROLLER ASSEMBLY 'i' Application `filed July 12, 1928. `Seria1 No. 292,187.

yThe invention relates to railway ear trucks, particularly that type provided with rollers beneath the end portions of the truck `bolster for the purpose of permitting lateral motion of the truck bolster and body bolster as a unit vwith respect to the truck side frames.

It is a common practice to provide rollers located between the end portions of the truck bolster and an element or seat engaged upon the truck springs. Two, three or possibly more rollers 4may be used at this location for the purpose of facilitating lateral motion of Vthe truck bolster. In 'actual practice it has Vbeendiscovered -that incase of derailment of a truck the rollers fall out and are consequently lost resulting in obvious disadvantages on account ofthe necessity for replacement and the expenditure involved therein.

It is with the above facts in view that I have devised the present invention which has for its general object the provision of a roller assembly having means whereby the rollers are positively retained in place so that loss thereof under any circumstances will be prevented. VAn important object of the invention is to Aprovide a roller assembly in which the roller retaining means is` removable vin case it is desired to replace a broken or worn roller or to disassemble the parts for any other reason. v

Another object of theinvention is to provide an assembly in which the `ordinary bolster fmay be used .without change, or in which the bolster may be modified Vso as to accommodate the roller retaining means, the cooperation of the retaining `means with the bolster=preventing any displacement of the former in service, it being necessary, in such an instance, to remove the entire assembly from the truck before the retaining means be .detached for liberating' the rollers.

A further object of the invention is to provide a rlateral motion roller assembly inwhieh the retaining means for the rollers may be formed as separate elementssimply attached,

or in which the retainingmeans may form an integrallpart ofthe roller seat member. de- Ypending upon the will of the manufacturer Y andthe contemplated cost of production. Y

An additional object is to provide an assembly of this character which will be simple and inexpensive to make, easy to assemble, positive in action, efiicient and durable in service, and a general improvement in the art.

To the attainment 'of the foregoing and other objects and advantages, theinvention Y preferably consists in the details of construc- Figure 3 is a side elevation of one form of roller,

Figure 4 is a view partly in elevation and partly in section showing a modified roller, Figure 5 is a perspective View of the assembly detached and illustrating the retainving means as diderently located,

*igure 6 is a detail longitudinal or vertical section through one end of a bolster modied for use in connection with the modified type of assembly shown in Figure 5.

Referring more particularly to the drawing, the numeral l designates a truck side frame havingthe usual window opening 2 which receives the reduced end portion 3 of jdie truck bolster 4.l The bolster is shown as having a center bearing 5 receiving the center plate, 6 on the body bolster 7 which in the present instance is represented as provided with depending bearing elements 8 cooperating with side bearingst) on the truck bolster. The side bearing structure does not enter into the presenty invention but is shown simply as being conventional. The numeral l0 designates the spring plank which supports the spring nest ll illustrated ,diagram-` matically, the nest `including any desired number of helical or other springs, as is customary, located between the spring caps l2. These springs support the truck bolster and it is between the springs and the bolster that Sli] -, 1928, though this A' complished invarious ways thev lateral motion roller assembly is mounted.

In carrying out the invention, I provide an assembly which includes a seat member indicated generally at 13 which is preferably of general, rect-angular shape and of a size to fit within the window opening 2, the member having spaced outstanding ribs 111 engaging against the opposite sides of the pedestal guides or sides of the window opening.

The underside of the memberv 13 .is preferably recessed or formed with aperipheral flange 15 so as to receive the upper spring cap 12. The top surface of is shown as formed withsimilar curved portions 16 which may, if desired, have the Vsame shape as disclosed in my co-pending application Serial No. 292,186 filed July 12,

is not necessary. AThe rollon the curvedfsurfaces 16 surfaces 18 ers 17 are mounted and in turn bear against curved on the underside of the bolster. ferred number of rollers is two though I do not wish to be limited'in this respect as more may be employed if desired. It is preferable that the underside of the bolster be onset upwardly as illustrated so as to permit the use cfvrollers of greater diameter than "ould otherwise be possible without changing the dimensions of the other parts. While the surfaces 16 and 18 are shown and described as preferably curved it will be understood that they might be inclined instead if such should be found desirable for any reasonV and it is contemplated that they may 'I be made in this shape or that there may be a combination of curved and inclined surfaces, for instance as set forth in said co-pending application aboveidentified. A

The principal feature of the invention is the provision of means ers in place with respect to the seat member 13 so that theV entire assembly will constitute a unit capable of being handled as such without disconnection or disassociation ofl jdie parts, this feature being of prime importance in preventing loss of the rollers in case of derailinentof afcar. T iis result may be acy and in Figures v1 andf2 I have shown the 'rollers as provided at their ends with reduced extensions or trunnions 19 engaged by metal straps orbands 2O y which exl end the length of the seat member v therethrough and pro] 13 in embracing'relationthereto with their end port-ions curved downwardly at 21 and terminating in hooks 22 engaged beneath the flangesl. 1 y

.Instead fof being formed with the trunnionsl 19, the rollers may be constructed as shown in VFigure 4 Vwherein the roller 17L is disclosed fas havinga shaft 23 extending thereof. v Whether the shaft be loose or tight 1 is immaterial.

have illustrated a '-InvFigures' 5 and 6 I need lmediiicationV in which the rollersv 17b the seat member 134 The pre-V for retaining the roll' ecting beyond the ends` not be provided with either the trunnions 19 or the shaft 23 inasmuch as use is made of a single retaining strap or band 24 similar to the bands 20 and hooked under the lian-ge 15 as above described. This single band is preferably loc-ated'at the center of the seat member 13 and bears directly upon the rollers themselves. In this instance the underside of the bolster end must be grooved as shown at 25 for the accommodation jof the retaining strap or band andA it will be observed that when theband is engaged within this groove it cannot become displaced laterally, that is to say lengthwise of the rollers. It cannot become displaced in the other direc tion asthe hooked ends are engaged beneath the flanges 15.

The assembly is installed within the truck in substantially the saine manner as one unprovided with retaining means for the rollers and it is obvious that in operation the rollers will act in identically the same manner as those in other devices of this general type. It is well known that when there is any tendency lof the car bodyfto move sideways, as for example when rounding a curve or when passing over a low spot in a rail, they truck and body holsters will, as a unit, move later4 ally with respect to the truck side frames, the surfaces v16 and 18 cooperating with the rollers to permit this movementv and at the same time to effect a lifting action which neutralizes or at least partially counterbalances the tendency of thecar to move laterally. The underlying Vtheory relating to the provision of lateral motion devices is so well known that further detailed explanation of the operation is` thought to be superfluous.` The principal feature in the present structure is that even though a truck be derailed the rollers cannot 'work out and become lost.

.that the construction, operation and advantages will be readily apparent to one skilled in the art without further explanation.

IVhile I have shown and describedl pre ferred Aembodiments of the invention, it should be understood that the disclosure is merely an ex'einplification of the principles involved as the right is rreserved to malte all such changes in the details of construction as will widen the fiel'dof utility and increase the adaptability of the device provided such changes constitute no departure vfrom Vthe spirit of the invention or the scopel'of the claims hereunto appended. f Y

VHaving thus described the invention, I claim: v

1. yIn a railway car truck including a truck bolster and supporting 'springs therefor, a seat member mounted upon the springs, rollers interposed between theseat member and the underside ofthe bolster, and means em-` V` bracing the seat member transversely of the rollers for retaining the rollers upon the seat member.

2. In a railway car truck including a truck bolster and supporting springs therefor, a seat memberniountedupontliesprings, rollers interposed between the seat member and the underside of the bolster, and means embracing the seat member and continuously over lying the rollers for retaining the rollers upon the seat'member.

3. In a railway car truck including a truck bolster and supporting springsV therefor, a seat member mounted upon the springs, rollers interposed between the seat member and the underside of the bolster, and means for retaining the rollers uponthe seat member, said means being received within the bolster.

4. In a railway car truck including a truck bolster and supporting springs therefor, a seat member mounted upon thersprings, rollers having their axes transverse to the bolster interposed between the seat member and the underside of the bolster, and means for retaining the rollers upon the seat member, said means comprising a metal band overlying the rollers and having its ends embracing the seat member.

5. In a railway car truck including a truck bolster and supporting springs therefor, a seat meni-ber mounted upon the springs, rollers interposed between the seat member and the underside of the bolster, and means for retaining the rollers upon the seat member, said means comprising a metal band overlying the rollers and having its ends connected with the seat member at the underside thereof.

6. In a railway car truck including a truck bolster and supporting springs therefor, a seat member mounted upon the springs, rollers interposed between the seat member and the underside of the bolster, and means for retaining the rollers upon the seat member, said means comprising a metal band overlying the rollers and terminating in hooks engaging beneath the edges of the seat member.

7. In a railway car truck including a truck bolster and supporting springs therefor, a seat member mounted upon the springs, rollers interposed between the scat member and the underside of the bolster, and means for retaining the rollers upon the seat member, Y said means comprising a metal band overly ers with its ends detachably connected be neath the edges of the seat member.

9. In a railway car truck including a truck bolster and supporting springs therefor, a seat member mounted upon the springs, rolleis interposed between the seat member and the underside of the bolster, and means for retaining the rollers upon the seat member, said means comprising a metal band located above and extending transversely of the rollers with its ends detachably connected beneath lthe edges of the seat member, the bolster having a longitudinal groove in its underside accommodating said band.

l0. A roller bearing assembly comprising a seat member adapted to rest upon the spring nest iii a railway truck of the lateral motion type, rollers mounted on said seat member, and means engaging said rollers and extending transversely thereover for preventing disengagement thereof from the seat member.

ll. A roller bearing assembly comprising a seat member adapted to rest upon the spring nest in a railway truck of the lateral motion type, rollers mounted on said seat member, means engaging said rollers for preventing disengagement thereof from the seat member, said seat member having a depending peripheral flange, and said means being detachably connected with said flange.

l2. A roller bearing assembly of the charaetei` described comprising aseat member Lavmg flanges at its opposite ends, rollers mounted on the seat member, and a metal band engaging portions of the rollers and terminating in hooks engageable beneath said flanges.

13. A roller bearing assembly for use in a lateral motion truck, comprising a seat member adapted to rest upon a truck spring nest, a plurality of rollers mounted on said seat member and adapted to cooperate with the truck bolster, and means on said seat member received within the bolster and'overlying portions of the rollers for maintaining the same against disengagement from the seat member.

lll. In a railway car truck including a truck bolster and supporting springs therefor, a seat member mounted upon the springs, rollers interposed between the seat member and the underside of the bolster, and means embracing the seat member and overlying the axes of the rollers for retaining the rollers upon the seat member.

In testimony whereof I aiiix my signature.

THOMAS H. SYMINGTON.

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