US70696A - chase - Google Patents

Description

S. A. CHASE.

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A. CHASE, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF- AND STEPHEN SMITH, 0F SAME PLACE.

Letters Patent 1%. 70,696, dated November 12, 1867.

IMPROVEMENT IN GAR-TRUCKS.

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Be it known that I, S. A. (blasts, of Boston, county of Suffolk, and State of Massachusetts, have invented certain new and useful Improvements in the Running Mechanism of Railway-0ar Trucks; and do hereby declare the following to be ai'ull, clear, and exact description of'thesame, due-reference being had to the accompanying drawings, making part of this specification, and in which Figure 1 is a. plan,

Figure 2 a side elevation, and v Figure 3 a vertical and transverse section of a railway-car truck constructed in accordance with my invention.

The,object ofthis invention is to obtain an increase in power for propelling a railway or other carriage, as well as to reduce the friction upon the bearings of the rolling portion of such car-truck.

The invention also has for its object to start the carriage for a short distance with the application of very little power, its value for this purpose being chiefly applicable to horse-railways.

The invention consists in the employment of two sets of axles and wheels, one disposed over the other, and with the load resting upon and sustained by the upper axles, the rollers of which rest and roll upon the lower axles, or'upon small hubs applied to the lower wheels, the journals of such lower axles being upheld in vertically-- sliding boxes, substantially as hereinafter explained. v

The invention further consists in the mode of applying the journals of the upper axles to their boxes or bearings, in such manner as to allow such journals to roll along forward within such box a short distance, until the vz's inertia: of the weight of the carriage is overcome, and impetus created upon such carriage by the employment of very little power, as well as to keep the journals well lubricated. I i i In the accompanying drawings, A denotes a car-truck frame, constructed in the ordinary or any proper manner. The upper axles are shown at B B, and their wheels at B B B. B, the lower axles being shown at C O, and their wheels at C C O C, the periphery of the upper rollers resting upon and supported by the lower axles or hubs a a, fixed to the outer sides-of the lower wheels. 1 The journals a a of the lower axles are supported in position by guides or slides b I), extending downward from the side rails or trusses D D of the truck A, and so as to be capable of vertical movements therein. The journals c a of the upper axles B are situated over the lower journals .1 a, and are disposed within horizontal slots or apertures cl (1, made in metallic blocks e e, aifixed to and depending from the trusses D D, and making part of or joined to the guides 6 la, before mentioned. A small lip or. ledge,f, upon each side of the apertures oi oi, forms a chamber, 6 or 6 of the lower part of such aperture, which serves to contain oil of other matter for lubricating thejournals c c; and in order to prevent escape of such lubricator, the journals are made somewhat larger than the miles, the inner one of the lipsf extending upward alongside-of the shoulder thus formed, as shown in fig. 3 of the drawings. In order to make this enlargement of the journals, I have contemplated applying to such journals'a hardened-steel tube, thus obtaining the most durable hearing at a small cost. Similar chambers to the chambers Z1 6 are to be formed below thelower journals or a,- for a like purpose. The blocks e e rest upon the top of the upper journals c-c; consequently the weight of the car and its load is supported upon such journals, and not upon the lower ones.

The operation of the above-described arrangement of parts is as follows: As the lower wheels 0 C, etc., roll and advance along the rail or surface of the road, they are, theoretically, the driving power. The lower axles or the hubs a a not upon the large circumference ofv the upper wheels, to propel them with a great increase in power, the gain being in proportion to the increase in size of the upper wheels or rollers 13 B B B over the hubs a a. As' the load rests upon the upper journalsc c, the entire weight of such load is transmitted, by the hubs a a and the wheels or rollers B B B B, from the wheels 0' C C G to the said upper journals 0 c.

It might be urged as an ofi'set to this gain that I employ two bearings instead of one; but as both the lower and upper journals bear but upon one point only in their circumference, the friction upon such journals is reduced to an exceedingly small amount.

It might also be said that the upper journals would wcar'out rapidly; but the fact is, thcslow rotation of these upper journals diminishes the wear which would result from the more rapid revolution of the lower journals, and thus'equalizes the loss resulting from'thc employment of two bearings.

It is well known that in starting horse-cars the horses are frequently thrown down, and always more or less strained in the attempt. By my construction of the hearings of the upper journals, such journals will roll along the under or bearing surface of the blocks e e, until the via inertia: of the'weight of the carriage and its load is overcome, and a momentum gained by the expenditure of very little power upon the part of the horses. By my construction of.the bearings there is no possibility of such bearings becoming heated. To lubricate such journals, it is only necessary to replenish the amount of oil contained in the chambers about them, which needs to be done only at long intervals.

Having now described my invention, and the manner in which the same is or may he carried into effect, what I claim, and desire to secure by Letters Patent, is-- 1. The combination, with the main axles and wheels of a car-truck, of the upper rollers, when supported in elongated hearings, substantially as and for the purposes described;

2. The combination, with the journals 0 c, of their elongated bearings and lubricating chambers, substantially in the manner and for the purposes set forth.

S. A. CHASE.

Witnesses:

FREDERICK Goons, E. C. GRIFFITH.

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