Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS284790 A
Publication typeGrant
Publication dateSep 11, 1883
Filing dateFeb 5, 1883
Publication numberUS 284790 A, US 284790A, US-A-284790, US284790 A, US284790A
InventorsRomas Abt
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Permanent wat foe mountain railways
US 284790 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

(No Model.)



Patented Sept. 11, 1883.


fiV VENTOR N, mans Phoko-Lihngnphu. Wuhingwn. ac



SPECIFICATION forming part of Letters Patent No. 284,790,-da.ted September 11, 1883.

Application filed February 5, 1883. (No model.) vPatented in Germany November 30, 1882 {in France December 16, 1882, No. 152,677, and in Italy March 31, 1883, XVI, 14,971, and XXX, 32.

To aZZ whom it may concern:

Be it known that I, ROMAN ABT, a citizen of Switzerland, and a resident of Paris, France, have invented certain Improvements in Permanent lVays for Mountain Railways, of which 7 the following is a specification.

My invention relates to certain improvements in the construction of the racksor toothed rails of inclined railways, as more fully described hereinafter.

In the accompanying drawings, Figure 1 is a transverse section of my improved toothed rail. Fig. 2 is a transverse section of a modification; Fig. 3, a transverse section of a further modification; Fig. 4, a side view of the compound rail shown in Fig. 1; Fig. 5, a transverse section of a railway provided with my improved rack-rail.

My improved rack-rail, into which the toothed driving-wheel on the locomotive is intended to gear to draw the train up the inclined railway, is intended to be laid midway between the usual smooth rails, as shown in Fig. 5. Instead of being made in one piece, as usual, it is made up of two or more rackbars, A A A supported at intervals on and bolted to flanged supports or chairs B B, as shown in Figs. 1, 2, and 4. The teeth of these rack-bars, instead of being of the usual gear shape, are wedge-shaped, tapered upward, as

shown in Fig. 4, and the bars are spaced apart, Figs. 1 and 2, and so arranged in relation to each other that the teeth of the several bars are out of line witheach other, as in dicated in Fig. 4. The lengths of the several bars are also preferably arranged so as to break joints. Where the joints occur, the bars are united 'by bolts and a suitable fishplate, I), Fig. 4, in any convenient way. The rack-bars A A may themselves be flanged, as shown in Fig. 8, if desired.

The setting of the teeth of the compound rack-rail out of line-with each other insures the direct engagement of the corresponding toothed drum on the locomotive, so that this drum may be driven direct from the engine and intermediate transmission-wheels dispensed with. It also admits of a rate of travel as high as twenty-five kilometers per hour without affecting the smooth running of the train. I

I claim as my invention 1. A compound rack-rail for inclined railways, composed of a number of united bars having their teeth arranged out of line with each other.

2. A compound rack-rail. composed of a number of united bars having tapering or wedgeshaped teeth.

3. The combination of flanged chairs with a compound rail composed of rack-bars A A, spaced from each other.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.




Cooperative ClassificationA47L15/06