US30006A

US30006A - Safety-gtjakd fob

Info

Publication number: US30006A
Authority: US
Publication date: 1860-09-11
Anticipated expiration: 1877-09-11

Description

vUNITED STATES PATENT UFFICE.

THOMAS STEVART, OF PITTSBURG, BENNSYLVANIA.

SAFETY-GUARD FOR RAILROADS.

Specification' of Letters Patent No To all whom t may concern:

Be it known that I, THOMAS STEWART, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and Improved Safety-Guard and Brake for Railroad Cars; and I do hereby declare 'that the following is a full, clear, and exact description of the saine, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a side sectional view of my invention taken in the line m, Fig. 4; Fig. 2 a transverse vertical section of the same taken in the line y, y, Fig. l; Fig. 3 a transverse vertical section of the same taken in the line e, e, Fig. l; Fig. 4, an inverted plan of the same.

Similar letters of reference indicate corresponding parts in the several igures.

This invention has for its object, firstly, the preventing of the throwing of the cars from the track by obstructions or other causes as well as the sustaining of the cars in case of the breaking of a wheel or axle; secondly, in a novel and improved brake forv expeditiously braking up the cars by a moderate application of power.

To enable those skilled in the art to fully understand and construct my invention I will proceed to describe it.

A, Arepresent the rails of a rail-road track which niay be laid as usual, and B, is a central rail parallel with A, A, but more elevated. This central rail B, is of T form, its tread or horizontal tlanch a, being sufficiently wider than its vertical part b, to form a projection a, at each side of b, as shown clearly in Figs. 2 and 3. This central rail B, may be constructed of wood and firmly bolted to the sleepers or cross ties c, on which the rails A, A, are secured and the edges of the projection ct, are faced with metal plates d.

C, is a car truck which is provided with t-wo axles D, I), having wheels E, attached as usual, and F, F, are two parallel bars which are fitted on the axles D, connected at their front ends by traverse pieces e, and braced by oblique bars f.

To a central traverse bar g, of the truck C, there are attached two pendants h, v, between which a roller Gr, is tted, the

. 30,006, dated September 11, 1860.

journals of the roller having their bearings in the pendants it, h. Each pendant L, has a hook c', attached to it, said hooks projecting under the edges a, a', of the flanch a, ofthe central rail B, as shown clearly in Fig. 2. The roller G, when the truck is supported by its four wheels E, is jus-t above the surface of the central rail B.

To the truck there are attached by oints y', two pendants H, H, which extend down between the traverse pieces c, c, of the bars F, F, and have each a shoe K, at their lower end, said shoes being directly opposite the edges a, of the iianch central rail B. Each pendant H, has a spring Z, bearing against its inner side, said springs having a tendency to keep the shoes 7c, off from the edges a', of the rail B, as will be fully understood by referring to Fig. 3. To the lower part of each pendant H, a rod I, is attached, said rods being also connected to the bars F, and serving as braces to the pendants. The pendants It, h, are also braced from the bars F, by rods m. The lower ends of the pendants H, H, have each a cord or chain, n, attached to them. These cords or chains n, pass up between rollers o, 0, which are tt'ed between the traverse pieces c, c, and said cords or chains are connected at their upper ends and pass over a roller f", and are attached to a lever J, on the truck,said lever being connected to an ordinary hand rod K, by a cord or chain g.

From the above description it will be seen that in case of the breaking of a wheel or an axle of the truck, the roller G, will tall on the central rail B, and support the truck, and it will also be seen that the hooks c', will prevent the car being thrown from the track. In order to brake up the car the hand rod K, is turned and the pendants H, thereby actuated so that their shoes 7c, 7c, will be pressed against the edges a', of the bar a, of rail B.

Bylthis arrangement a very simple and eectual means is obtained for guarding against the throwing of the car from the track and also against the breaking of a wheel or axle. A simple and eiiicient brake is also obtained which when' applied has a tendency to keep the car secured to the track.

Having thus described my invention what J, and rod K, all as herein shown and de- I claim as newand desire to secure by Letscribed. ters Patent is: Y n l The arrangement of the central roller Gr, THOMAS DTEWART' 5 rail B, pendants 71 and hooks i, with the Witnesses:

wheels E, rails A, pendants H, H, springs THos. OWsToN, Z, Z, rods I, bars F, F, rollers, o, o, f", lever' LEWIS BRoWN