US374305A - Truck for locomotives - Google Patents

Description

(No Model.)

J. JOHNSTON.

TRUCK PoR LoeoMoTIvBs.

Patented Deo. 6, 1887.

N. PEIERS. Phan-Limusnpim. wan-hingen, D. t;

' UNITED STATES PATENT OFFICE.

JOHN JOHNSTON, OF JERSEY CITY, NEV JERSEY;

TRUCK FOR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent No. 374,305, dated December 6, 1887. Application mea Ju1y11,1es7. stl-ini No. 43.947, (No mode.)

To all whom it may concern:

Be it known that I, JOHN JOHNSTON, of Jersey City, in the county of Hudson and State of New Jersey, have invented an Improvement in Trucks for Locomotive-Engines, of which the following is a specification.

Trucks for locomotive-engines have heretofore been constructed with cross-bars passing in front and behind a bearing-block, upon which the forward end of the boiler rests, and in which there is a cylindrical recess receiving a similar projection below the boiler, so that the truck may swivel at 'this place, and between the bearing-block and the cross-bars of the truck-frame there are inclined suspending-linkstwo atreach side-which allow the truck to move laterally as the engine runs around a curve. A device of this general character as first employed may be seen in Letters Patent No. 32,377, granted to A. F. Smith February 11, 1862.

In trucks of this character there is a very heavy strainand wear upon the joints of the links, it is difficult to lubricate the parts, andthe dust lodging upon them increases the rapidity of wear, and in practice it is found necessary to replace the links and the bolts very frequently, and in oase it becomes necessary to separate the truck from the locomotive, for repairs or otherwise, it can only be done by the removal of six or eight nuts or bolts.

The object of my present invention is to distribute the weight over a large area, so as to prevent the metal cutting under the weight and motion, and to provide for separating the truck fronfthe bearing-block with facility.

In place of usingv the four suspending-links, I introduce two hook shaped suspendingplates extending from one cross-bar to the other, so as to obtain the largest surface possible for the weight to restupon, and at the same time the principal parts of the truck remain unchanged and the efficiency is not injured.

- rIhe wheels A, axle B, side frames, C, springs D, and cross-barsE are such as are usually employed in locomotive-trucks, and these parts vary according to the character of the locomotive.

F is the bearing-block, havinga circular cavity, 2, at the central upper part for the reception of the cylindrical projection below the forward part orflue-chamber ofthe boiler, and this bearing-block F has the downwardly-projecting flanges and arms 3, as heretofore usual; but instead of separate links being bolted to the four projecting ends of the arms, thesearms are connected by cylindrical bearings 4, either cast with or bolted tothe arms, so that these cylindrical bearings run fore and aft at the lower side portions of the bearing-block; It will be observed that the bearing-block is between the transverse frames or cross-bars E, as usual; but instead of four links-two on each side-- being bolted to these cross-bars E, I makeuse of two bolts, G-one on each side-parallel to but closer together than the cylindrical bearings 4, and the suspending-plates II are of a width corresponding to the distance between the cross-bars E, and they are made with tubular eyes 8 at the upper ends, through which the bolts G pass, and with hook-shaped lower ends, 9, that pass beneath and inclose these cylindrical bearings 4 upon the bearingbloek F.

By the foregoing construction the truck' as a whole can turn or swivel at the cylindrical projection that enters the recess 2, and the truck-frame can slide laterally, the cross-bars E moving in front and back of the bearingblock F, and in so doing the suspending-plates H swing upon the bolts G, and the hooks 9 turn slightly upon the cylindrical bearings 4. The length of surface upon the bolts G and upon the bearings 4 is so great that the weight of the locomotive is distributed upon a large area, and the surfaces in contact do not cut into each other, and it is easy to lubricate such surfaces by oil applied upon the tops of the bearings 4, and also within oil-cups that may be applied at 10 upon the tubular bearings of the suspending-plates II; and when the truck-frame is to be separated from the bearing-block it can be easily done by raising up IOO such bearing-block until the lower ends of the ings 4, and tubular eyes 8, extending from one Io suspending-pi'ates unhook from the cylindrierosshzu to the other, and the bolts G, which cal bearings 4. pass through the tubular eyes and cross-bars,

I daim as my invention.n substantially as set forth.

The c01nbnation,With the truek-frmnehav- Signed by me this 5th day of July, 1887. ing the cross-bars E, and the bearing-block F, JOHN JOHNSTON. having cylindrical bearings 4 between such Vitnesses: cross-bars, of the suspending-plates H, hav- JOHN JELLY, ing hook-shaped lower ends, 9, for the hear- THOMAS S. JOHNSTON.

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