US449117A - Theodore graham gribble - Google Patents

Description

' (No Model.) I T'. G., GRIBBLB.

-GONSTR'UOTING STREET RAILWAY TRACKS.

No. 449,117. Patented Mar. 31, 1891.

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THEODORE GRAHAM GRIBBLE, OF LONDON, ENGLAND.

CONSTRUCTING STREET-RAILWAY TRACKS.

SPECIFICATION forming part of Letters Patent No. 449,117, dated March 31, 1891.

Application filed January 13, 1891. Serial No. 377,620- (No model.)

To all whom it may concern:

'Be it known that I, THEODORE GRAHAM GRIBBLE, a citizen of London, England, residing in the city of Yonkers, State of New York, have invented a new and useful Improvement in Constructing Street-Railway Tracks; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed .drawings, making the same a part of this specification, in which Figure 1 represents a transverse section of the metallic box, gage-bar, rail, and concrete foundation. Fig. 2 shows a perspective view of web I) of the box and slot 0 for the introduction of the gage-bars. Fig.3 represents the gage-bar having wedge-shaped ends.

My improvement particularly relates to a form of railway-track having for the support of the railway-rails a continuous longitudinal metallic support open at the top, bottom, and sides for the introduction of concrete or other analogous material, for which I have already made application for Letters Patent, Novemher 8, 1890, Serial No. 370,815..

The object of my present improvement is to effect a more perfect anchorage of the metallic box or longitudinal stringer and to give greater lateral stiffness and strength to the structure without the use of holding-down bolts, rivets, spikes, or similar attachments and to dispense with the metallic yoke system now employed in cable roads. I attain this object by giving to the metallic sides of the box-shaped stringer, Fig. 1, a taper or enlargement at the bottom or top I) b, so that it will underlie and engage with the concrete 6 when the latter has been deposited and has set inside the box. The connection between the box and its foundations will be preserved by their mutual tenacity. I first lay the bottom bed of concrete 6 or other analogous material, after which I place the metallic box I) b in position and fill on the outside of the box (Z for a few inches in depth. The inside of the box is then filled completely by means of openings in its upper surface, as shown in the drawing annexed to my first specification, to which I refer. The upper portion of the concrete e is laid before the lower portion 6 has set. Thus a monolithic mass is obtained, inclosed in the metallic box I) b.

In order to increase the lateral strength and stiffness of the track and structure, I

have invented a new method of attaching with the entire metallic yoke system now in use upon cable roads.

By this device I hold in place laterally the rails and structure, maintaining a uniform gage throughout the entire track, and thus prevent the rails from spreading. I attain these objects by casting slots 0, Fig. 2, opposite one anolher in the vertical webs b of the metallic box, the outside slot being slightly larger than the inside to receive the metallic gage-bar c, which is tapered at both ends to correspond with the difference of width in the slots. The bar 0 is thus engaged with and is held by the slot 0 laterally in the web and vertically by the cement filling and overhanging part of the web and rail. The bar is inserted in the slot 0, Fig. 2, when the metallic box is placed in position, but before the same is filled with concrete, and is held in place temporarily by props while the concrete is being filled in the web and underneath the bar. When the box is filled with concrete, the bar becomes wedged in the slot and embedded in the concrete and metallic mass.

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

1. The combination, with the bed of concrete or like material, of abox-like longitudinal support open more or less at the bottom and top, the lower parts of web and side walls being provided with enlargements adapted to underlie and engage with part of the concrete bed, as set forth.

2. A metallic gage-bar having wedge-shaped or tapered ends and fitting with slots contained in a metallic longitudinal support for railway-tracks, in combination with a bed of concrete and a box-shaped longitudinal support for railway-rails, as set forth, said gagebar being held in place without the use of bolts, spikes, or rivets, or other attachments, except the aforesaid slots and the cohesion of concrete.

THEODORE GRAHAM GRIBBLE.

Witnesses:

H. L. GARRISON, PERCY GRIFFITH.

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