US402533A

US402533A - Tunnel-yoke for cable railways

Info

Publication number: US402533A
Authority: US
Publication date: 1889-04-30
Anticipated expiration: 1906-04-30

Description

(No Mode-1.) 2 Sheetsj-Sheet 1.

C. A. MARSHALL. l

TUNNEL YOKB FOR CABLBRAILWAYS.

10.402,533. Patented Apr. 3o, 1889.

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L: 'l #fw e n W'xmeisses. Xmemc.

, 3 shows a section taken atthe line J J through Fig. 5 shows in perspective the UNITED STATES PATENT OFFICE.

CHARLES A. MARSHALL, OF JOHNSTOWN, PENNSYLVANIA, ASSIGNOR TO THE JOHNSON COMPANY, OF KENTUCKY.

TUNNEL-YOKE FOR CABLE RAILWAYS.

SPECIFICATION forming part of Letters Patent No. 402,533, dated April. 30, 1889.

Application led October 21, 1887. Serial No. 252,956. (No model.)

To all whom it may concern:

Beit known that I, CHARLES A. MARSHALL, of Johnstown, in the county of Cambrial and State of Pennsylvania, have invented a new and useful Channel-Yoke for the Tunnels of Cable Railways, which invention is fully set forth andl illustrated in the following specification and accompanying drawings.

`The object of this invention is to make strong and durable built-up yokes for the tunnels of cable railways, which yokes shall combine great strength with a minimum weight of metal.

The invention will first be described in detniil, and then fully set forth in the claim.

In the accompanying drawings, Figure l illustrates in front elevation one type or form of built-up yoke.V Fig. 2 shows a side elevation of Fig. 1,looking to the left, the slotrail S and track-rail F being omitted. Fig.

Fig. l. Fig. 4 shows a section taken at the line K K through Fig. l, looking to the right.

yoke illustrated geometrically in Fig. l.

In said figures the several parts are indi-y cated by letters, as below described.

The whole Astructure in the several ligures being entirely composed of angle metal and plate metal, the interior angles are indicated by the letter A and the exterior angles by the letter B. The arms for supporting the trackrails are indicated by the letter b.

The letters C C indicate plates which form the lower web portions of the structure, and D D the bottom angle pieces or stiffeners.

E E indicate re-enforcing plates, which, by lapping the lower web-plates, C, and upper web-plates, G, at their joints, strengthen said joints. l

F indicates a Tbar support for the trackrails, which may be of any desired type or form of rail, two different forms being shown, as vindicated by the letter F.

H, Fig. l, indicates another form of chair or rail-support for therail F, thereon mounted, devoid of lower ange. Any type of chair or other rail-suppport may be used, as such sup ports form no part of this invent-ion.

The letters S S indicate the slot-rails, which 5o may be made of any desired form suitable for the purpose, the slot for the passage of the cable-grip being indicated by the space shown between said slot-rails.

In types of yoke shown in Figs. l and 5, respectively, it will be observed that the channel form is preserved throughout, which construction imparts great strength to said struct= ures. It is obvious that instead of anglepieces T-bars may be used; but in such case 6o it is also obvious that the costof the structure will be much increased.

Practical tests have demonstrated that a structure such as illustrated in Fig. l is about as rigid or offers as great resistance to the o5 closing of the slot for the passage of the cablegrip as can be made with a given weight 0f metal. It will thus be observed that, with the exception of such pointsas those at which the bottom binders, D D, overlap the two side 7o structures, C G, the shape of the section ofmetal preserved is that of achannel. That portion of the bottom binders which gives the measure of their whole strength is through the vertical line oc oc. In this, also, is the channel form preserved, so that the measure of the stiffness of the yoke throughout is that of a channel-section, the only point where said section is not preserved being that wherein the bottom binders overlap the side members 8o for purposes of construction. l

Having thus fully described my said invention of yokes for cable railways, I claim- A built-up yoke for the tunnels of cable railways constructed entirely of angle metal Y and plate metal, so that said yoke presents a channel-section viewed either through its side walls or through the center of its bottom binders orbrace, substantially as set forth.

CHAS. A. MARSHALL.

Witnesses: E. B. EN'rwIsLn,

W. MCLAIN.