US690403A - Car-truck. - Google Patents

Description

Patented lan. 7. |902. S. A. CRUNE.

C A B T H U C K (Application led Aug. 22, 1901.)

(No Mdel.)

l xNvENToR Jem W NESSES MEE..

No. 690,403. Patented lan. l7, |902.

S-. A. BRUNE.

GAR TRUCK.

(Application filed Aug. 22, 1901.)

(No Model.) 2 Sheets-skein 2.

UNITED STATES PATENT" FFICE.

sETH A. CRONE, or NEW YORK, N. Y.

CAR-TRUCK.

SPECIFICATION forming part of Letters Patent No. 690,403, dated January 7, 1902.

llpplication filed August 22,1901. Serial No. 72,861. (No model.)

To ctZZ whom, it may concern:

Be it known that I, SETE A. CRONE, a citizen of the United States, and a resident ofv New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Car-Trucks, of which the following` is a specification.

The invention relates to improvements in car-trucks; and it consists in the novel features, structure, and combinations of parts hereinafter described, and particularly pointed out in the claims.

My invention pertains more especially to a novel rocker-bearing disposed intermediate The springs which support the ends of the bolster and the transverse beam which connects the side 'frames of the truck and by means of which bearing the bolster is rendered capable of limited endwise movement. As a matter of choice I dispose the rocker-bearing embodying my invention below the spring-support for the bolster; but it is obvious that said bearing may be placed intermediate the bolster and the upper ends of said springs without departure from my invention.

The rocker-bearing of my invention when in its preferred forlnV for the locations referred to will comprise an upper member, a lower member, and two or more intermediate mem.

bers, the latter being arranged at right an'- gles to the length of the bolster and being elongated or elliptical in cross-section, with their sides or greater surfaces in contact With said upper and lower members,which present convex surfaces to said intermediate members.

The object of the invention is to producea highly efficient, durable, reliable, and desirable truck-bolsterbearing for permitting endwise motion of the bolster and one in which broadcontacting surfaces are presented to the moving parts and which will not become fouled or rendered inoperative by accumulations of dust or other foreign matter.

The invention and satisfactory means for carrying the same into effect will be fully understood from the detailed description hereinafter presented, reference being had to the accompanying drawings, in which- Figurel is a side elevation of a car-truck frame constructed in accordance with and embodying my invention. Fig. 2 is a vertical transverse section of same on the dotted line 2 2 of Fig. 1. Fig. 3 is a detached edge view, on an enlarged scale, of the members of the bearing. Fig. etis adetached top View of one of the intermediate members of the bearing; and Fig. 5 is a detached top face view of the lower member of the bearing, this figure also accurately representing the lower face of the upper member of the bearing, the facing surfaces of whosel members exactly correspond with one another.

In the drawings, 10 designates the side frames of the truck, ll the bolster therefor, 12 the beam connecting said side frames, and 13 'the springs which support the ends of said bolster, the said designated features being of Well-known construction and requiring no special description.'

Intermediate the springs 13 and the ends of the beam 12 is arranged the bearing comprising the upper member 14, the lower member 15, and the intermediate members 16,

the latter being two rockers which are elliptical or elongated in cross-section and provided at the ends of their upper and lower sides with teeth 17 to engage the end recesses 1S inthe upper and lower members 14 and 15, the longer axes of saidrockers or intermediate members being4 normally horizontal, so

that saidv rockers may present their upper and lower sides or more extended surfaces to the facing surfaces of the said upper and lower members. The rockers or intermediate members 1o' are arranged at right angles --to the bolster 1l, so that said bolster may have when required a movement transversely of the truck or in line with its length. The upper and lower members Hand 15 correspond, su bstantiall y, with one another, and each is in the form of a rectangular plate provided or'formed with the convex surfaces 19 and the aforesaid recesses 1S. The convex surfaces 19 are at right angles to the length of the bolster ll and parallel with one another, and the convex surfaces 19 of the upper memberl 14 are ldirectly over and face the convex surfaces 19 ofthe lower member 15. The rockers orintermediate members 16 are disposed between and contact with the convex surfaces '19 of the upper and lower members 14 15, as shown in Fig. 3, the con- Vex surfaces of the rockers 16 thus coperat- IOO 4o their normal position.

6o ment of the members of the bearing.

ing with the convex facing surfaces of the said upper and lower members.

The normal position of the members of the bearing is shown in Fig. 3, this being the position of said parts when the cars are traveling on straight tracks or when there is an absence of side thrust exerted against the bolster 11.- When, however, there is a lat- -eral thrust against the bolster 11, the latter ro may move in line with its length to alimited extent, and at such time the upper member 14, moving laterally, will eect a turning or rocking action in the rockers or intermediate members 16, the latter turning axially against the facing convex surfaces 19 of the upper and lower members 14 15 and being adapted to turn in either direction in accordance with the motion of said bolster. The cooperating teeth 17 and recesses 18 serve to center the zo rockers 16 at the apices of the convex surfaces 19 and prevent said rockers from losing their position.

The horizontal elongation or elliptic form of the rockers 16 is of importance for several z5 reasons, among which it may be mentioned that by reason thereof the rockers 16 while performing a turning action in either direction will force the upper member 14 upward against the pressure of the car-body and its 3o load, due to the increase of diameter in a vertical direction presented by the said rockers 16. The form of the rockers 16 is definitely such as to compel them to move the upper member 14 upward when they are turned from their normal position, and this lis important, since thereby they are resisted in their movementfrom a normal position by the load above them, and the weight of this load serves to 'force the rockers 16 back to The rockers 16 are of such dimensions that they never turn completely over, but merely rock or turn'axially to a limited extent in one direction or the other. The elliptic or elongated form of the rockers 16, whether one or more be used, is

also of great importance in that thereby adequate contacting surfaces are afforded and the tendency to flattening said surfaces is greatly diminished. The broad elongated 5o curved surfaces presented by the rockers 16 are also of importance in that by reason lhereofvnot only is flattening of the contacting surfaces in large measure avoided, but such flattening ofsurfaces is prevented from injuriously affecting the bearing, since by 'conditions the said limited surface became more readily iiattened and ythe flattening thereof had an immediate prejudicial eect upon the bearing as a whole. Attention should also be directedto the fact that in the construction of my bearing the rockers 16 are mounted on and between convex surfaces in lieu of being set into recesses or between Hat surfaces and that therefore the accumulation of dust or other foreign matter about said rockers is avoided.

The invention is not limited to any special construction of trucks or bolster nor to the employment of any special number of rockers 16, since in some instances it may be desired to use three rockers 16.

The curvature of the surfaces 19 is such as not to prevent the rockers 16 from, when turned from their normal position, forcing the upper members 14 upward against the stress of the load above them.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a car-truck, the bolster, and a springsupport for said bolster, combined with the interposed bearing below said bolster to permit endwise movementof the latter, said bearing comprising the upper and lower facing members 14, 15, both located at one end of the springs and each having the parallel convex surfaces 19, 19, extending at right angles to the length of said bolster, and the parallel intermediate rocker members 16, 16, also disposed at rightangles to the bolster, said rocker members being elliptic or elongated in crosssection and presenting their more extended convex upper and lower surfaces to the said facing convex surfaces 19, 19 of said upper and lower members; substantially as set forth.

2. In a car-truck, the bolster, and a springsupport for said bolster, combined with the interposed bearing below said bolster to permit endwise movement of thelatter, said bearing comprising the upper and lower facing members 14, 15, both located at one end of the springs and each having the parallel convex surfaces 19, 19 extending at right angles to the length of said bolster, the parallel intermediate rocker members 16, 16 also disposed at right angles to the bolster, and the end 'teeth and recesses 17, 18, for preserving the alinement and position of said rocker members, said rocker members being elliptic or elongated in cross section and presenting their more extended convex upper and lower surfaces to said facing convex surfaces 19, 19 of said upper and lower members; substantially as set forth.

Signed at New York, in the county of New York and State of New York, this 20th day of August, A. D. 1901.

SETH A. CRONE.

Witnesses:

CEAS.' C. GILL, GUNDER GUNDnRsoN.

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