US321392A

US321392A - Car-truck

Info

Publication number: US321392A
Authority: US
Publication date: 1885-06-30
Anticipated expiration: 1902-06-30

Description

W. H. H. SISUM.

(N0 Model.)

GAR TRUGK.

No. 321,392. Patented June 30, 1885.

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. UNITED Srrrrns PATENT FFlCE.

CAR-TRUCK.

.JPLIGIPICATION forming part of Letters Patent No. 321,392, dated June 30, 1885.

I Application died May 24, 1884. (No model.) 7 v useful Improvement in Car-Trucks, of which the following is a specification.

I will describe a car-truck embodying my improvement, and then point out the various features in claims.

In the accompanying drawings, Figure 1 is a plan or top view of a car-truck embodying my improvement. Fig. 2 is a side view of the same. Fig. 3 is an'end view thereof. Fig. 4 is a view of certain parts,takcn endwise of the car-truck. Fig. 5 is a section of certain parts, taken lengthwise of the car-truck and Fig. 6 is a sectional side view of a modification.

Similar letters of reference designate corresponding parts in all. the figures.

A designates wheels secured in the usual or any other suitable manner to axles B. The ends of the axles B lit in journal-boxes O, which are arranged in slideways in the truckframe, so constructed that the journal-boxes and axles may move in the direction of the length of the axles.

The truck-frame consists of two side pieces, D, and transoms E. The side pieces, D, severally consist of an arch-bar, a, and an inverted arch-bar, b, fastened together at the ends and to columns 0 by bolts (1, and extending one above and the otherbelow columns 6. The columns 0 form the slideways for the journalboxes 0. A tie-rod, f, also forms part of each side piece D, and extends from the lower part of the columns 0 under the columns 6. It is secured to the columns a e by bolts, preferably the same bolts which secure the archbars a I) to said columns. All the parts of these side pieces, D, may be made of iron or other suitable material.

The transoms E extend between the columns 8 of the side pieces, D, one bar being arranged near the lower ends and the other bar being arranged near the upper ends of the said columns. These bars are secured to the columns by bolts passing transversely through the columns. Under the upper transom E is a bar, F. Below this is an angle-piece, G. Trussrods H pass under the anglepiece G, and are secured by nuts working on screwthreads to shoulders on the transoms E. On the top of the upper 'bar is a bearing, 9, for a (ZGDlJePpiD. The transomE and bar F may be made of wood.

I do'not lay any claim to the construction of the truck-frame'already described; nor do I'wish to be confined to the use of my improvement in connection with such a truckframe, as variations may be made without at.

feeling the improvement.

I designates rockers, which are interposed between'the journal-boxes C and the parts of the side pieces, D, of the truck-frame, by which the weight of the truck-frame and carbody is transmitted to the journal-boxes. In

the present instance these rockers are interposed between the journal-boxes and the in verted arch-bars I). They may be made of iron, steel, or other suitable material. Said rockers are adapted to rock in a direction transversely to the length of the car-body or truck-frame. Each of these rockers I has on the under side a fulcrum-piece, h, which is approximately of semicircular shape, and fits in a seat, The seat 2' is also approximately semicircular, and in the present instance is formed in the top of a journal-box. Although the seat i is semicircular it forms part of a larger circle than that of which the fulcrunr piece 71. forms part, and for this reason a suffioient space is afforded at the upper end of the seat for the rocking of the fulcrum-piece therein. The upper surface, s, of each rocker is substantially arc-shaped where the adjacent inverted arclrbar b rests upon it, and at the ends of this arc-shaped surface lugs j extend upward on opposite sides of the said inverted arch-bar b. The sides of the lugs j which are adjacent to the inverted arch-bar b are slightly farther apart than the width of the inverted arch-bar b, and preferably they diverge toward the outer end, in order that the rockers may rock or oscillate. The arc-shaped upper surfaces of the rockers are of such eccentricity as to result in a cam-like action. Such surfaces may, therefore, be justly called cam-shaped surfaces. On thesides of the rockers arelugs 7a, which fit in recesses l in the columns 0. These lugs are not quite so wide as the recesses, and their sides are preferably arc-shaped, so as to IOO allow of the rocking or oscillating of the rockers. The arc-shaped upper surface, s, of each rocker is not concentric with the circle of which the fulcrum-piece h forms part, but it forms part of a much larger circle, and is so shaped in a direction transversely to the length of the car-body or truck-frame that it is more distant from the fulcrum at the ends than at the center; hence when the rockers are rocked or oscillated the truck-frame, and consequently the car-body, will be raised, and by gravity will force the rockers back to the central positions when the disturbing cause shall have been neutralized.

A surface which would produce the same effect as the arc-shaped surface 8, although not strictly an arc-shaped surface, would be in efrender the car-body more comfortable to the occupants.

In Fig 6 I have shown an equalizer-bar, J used in conjunction with a rocker, 0.

It is provided with a pin, m, which enters a cavity in the arc-shaped surface s of the rocker, but loosely enough to admit of the rocker rocking or oscillating.

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

l. The combination, with axles, of journalboxes inclosing bearings operating in conjunction with the axles so as to move with the latter in the direction of their length, a truckframe provided with slideways in which the journal-boxes and axles may move in the direction of the lengths of the axles, and rockers arranged upon the tops of the journal-boxes and supporting the truck-frame, the rockers having camshaped upper surfaces, whereby, when the axles and journal-boxes are moved laterally relatively to the truck'frame, the truck-frame will be raised, substantially as specified. v

2. The combination, with a car-body or truck-frame, of a slideway forming part thereof, a journal-box, O, fitting within but unconnected to the slideway, a rocker arranged between the journal-box and car-body or truckframe, and being adapted to rock in a direc tion transversely to the length of the car-body or truck-frame, and lugs k, extending from the rocker and entering recesses Z in the slideway, substantially as specified.

. WM. H. H. SISUM. Witnesses:

T. G. KEANE, WM. G. LIPsEY,