US408993A - Six-wheeled car-truck - Google Patents

Description

(No Model.) 2 Sheets-Sheet '1.

' W. A. SCOTT. SIX WHE ELED UAR TRUCK Patented Aug. 13; 1889.

(No Model.) 2 Sheets Sheet 2.

W. A. SCOTT. SIX WHEELED OAR TRUCK.

*z No. 408,993. Patented Aug. 13, 1889.

NY PETERS. Phoiwlflhognwher, Washington. ac.

.cally in contact.

' UNITED STATES PATENT OFFICE.

\VALTER A. SCOTT, OF ST. PAUL, MINNESOTA.

SIX-WHEELED CAR-=TRUCK.

SPECIFICATION forming part of Letters Patent No. 408,993, dated August 13, 1889.

Application filed May 16, 1339. Serial N0. 310,976, (No model.)

To all 1072 0717, it may concern.

Be it known that I, WVALTER A. SCOTT, of St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Six-Vheeled Car- Trucks, of which the following is a specification, reference being had to accompanying drawings, and to letters of reference marked thereon.

The chief objects of my invention are to diminish friction and binding between flanges of the wheels and rails; to permit the locomotive to draw a much heavier load than usual; to reduce the wear and tear on rails and on the wheels of truck; to lessen danger of derailment and relieve flange-friction on curves, and to cause cars to ride with greater case than heretofore.

The invention, briefly considered, embodies a central pair of flat or flangeless wheels the end or lateral play of 'whose axle is diminished or practically prevented by use of a pcculiar construction of the hub of wheel and the back of axle-box, means being employed whereby a constant or sufficient lubrication may be maintained between the adjacent surfaces of the hub and axle-box, respectively, which during the running of car are practi- A stop-wedge of peculiar construction is used in the front end of the I box, so that upon wear of the hub-face or the box a stop-wedge for acting in conjunction with the back of the box and face of the hub for effecting such limitation of movement in the axle. Neither have such inventions embraced nieans whereby constant or sufficient lubrication between the back of the box and adjacent face of the hub, respectively, could be maintained In the accompanying drawings, Figure 1 is a side view of a six-wheeled truck embodying my invention. Fig. 2 is a plan view of the rails and wheels of the truck. Fig. 3 is an enlarged longitudinal section showing the construction and arrangement of the central wheels, boxes, and axle. Fig. 4 is a section at A B, Fig. 3.

Similar letters of reference indicate similar parts in the respective figures.

Arepresents the bodyof the truck, of which B B are the end wheels.

B B represent the central pair of flat wheels. Theend wheels 15 B are flanged in the ordinary manner and their axles given the ordinary play in the boxes. The central pair of wheels B are made flangeless or flat, as shown. The hubs a of the central pair of wheels are extended toward the axle-box and accurately turned or faced. The backs or adjacent faces a of the axleboxes O are also accurately faced, so that the two faces a a are adapted to work together, when brought in contact, with the least possible friction. The greatest distance apart of the faces a a is intended to be one-sixteenth of an inch.

' The axle-boxes O are each provided with a stop-wedge D, thespace between which and the end of the axle E is intended (when the faces of the hub and adjacent back of the axlebox are separated one-sixteenth of an thrust-bearings to thewheels, and are each provided with an oil-recess I), having a communicatin g channel 0, which leads to the space between the adjacent surfaces of the box and hub, so that a constant or sufficient lubrication may be maintained between said surfaces.

Figs. 3 and a show the construction of the stop-wedge and that part of the axle-box which receives it. The stop-wedge D is a brass having a soft-metal filling (Z, the wedge having grooves d, which fit over a fixed stand 6, cast as a part of the box. This construction allows the wedge to be readily removed and replaced.

It is found that the use of the central pair of wheels, having their end movement limited or reduced to, say, one-eighth of an inch in the manner described, tends greatly to diminish the friction and binding between the flanges of all the wheels of the truck and the rails, and it is found that a higher speed can be obtained with less likelihood of derailment on curves than with a truck of different construetion.

A six-wheeled truck embodying my invention, as hereinbefore described, can be operated with as little flange friction and wear as can the ordinary four-wheeled truck, while my truck is found to possess much easier-riding qualities than any truck with which I am familiar, the flange-friction being reduced to the minimum.

The power necessary to haul a'train of cars on six-wheeled trucks embodying my invention will be greatly reduced 011 a straight track, and on curves at large percentage of power will be saved. Ithas been found that the cost of maintenance in using my truck is more than one-third less than in the use of the ordinary sixwheeled truck. orn-out tires of flanged wheels can be used for producing flat center wheels, and, as has been demonstrated, a mileage of from one to four hundred thousand miles can be safely obtained from a tire which has ordinarily been considered valueless except for scrap.

Having described my invention, I claim- 1. In a six-wheeled car-truclgthc following elements in combination: a frame, end wheels flanged in the ordinary manner, a central pair of flat wheels having hubs with outer-turned faces, central axle-boxes having their backs trued or faced and provided with end stop wedges, the spaces between the outer face of each hub of the central pair of wheels and the back of each central box and between the end of the axle and the stop-wedge of each central box being each reduced to the minimuln say one-sixteenth of an inch each central axle-box being provided with a recess and a channel for the supply of oil between the hub and box, substantially as set forth.

2. An axle-box having its back made extra heavy and provided with an oil-recess I) and a communicating channel 0, substantially as set forth.

3. An axle-box provided with a fixed stand 6, cast as a part thereof, combined with a stopwedge I), having soft-metal filling (I, and grooves (1', which fit over the fixed stand c, substantially as set forth.

In testimony whereof I hereunto set my hand and seal.

W. A. SCOTT. [1,. s]

\Vitnesses:

D. HELAKER, N. K. POTTER.

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