US598062A - Hermann biermann - Google Patents

Description

(No Model.)

H. BIERMANN. DEVICE FOR PREVENTING ACCIDENTS 0N RAILRQADS. No. 598,062. Patented Jan. 25, 1898.

Will! UNITED STATES PATENT HER-MANN BIERMANN, OF BRES'LAU, GERMANY.

DEVICE FOR PREVENTING ACCIDENTS ON RAILROADS.

SPEGIFIGAT ICN forming part of Letters Patent No. 598,062, dated January 25, 1898.

Application filed April 6, 1896. Serial No. 586,444 (No model.) I

To all whom it nmyconccrn:

Be it known that I, HERMANN BIERMANN,

, merchant, of Paradiesstrasse, Breslau, in

the Province of Silesia, Kingdom of Prussia, German Empire, have invented new and useful Improvements in Means for Preventing Accidents on Railroads, of which the following is a specification.

My invention relates to a device for preventing aocidents on railroads caused by the breaking or loosening of rails or of the connecting parts, as fish-plates, screws, and the like; and the object of my, invention is to actuate bymeans of electricity the alarm and safety apparatuses of the train when a rail has broken or a fish-plate is loosened before the train has reached the defective spot. I attain this object by means of arrangements illustrated in the accompanying drawings, in which- I Figure 1 shows the back view of a locomotive provided with the current-generator and the conductors. Figs. 2 and 3 show diagrammatically a part of the track with a main line and a secondary line.

The track is used as a main line for the electric current flowing from the current-generator c2 of the locomotive and is divided in several fields u b c, non-insulated from each other by means of wires 19 o p o p n or other conductors. At the end of each field a contact device is arranged for the purpose of interrupting the main line of each field and conducting the current over thenext field and back to the current-generator by means of a secondary line formed by means of the wires is 71; 70 insulated from each other at q q respectively. For everydirection in which the train passes a secondary conductor is required, althoughin the drawings the arrangement is shown only for one direction. (Indicated by arrow.) At the end of the field a the rails a and c are connected with the wires and o, and these wires are passed through the contact device 9, connecting the wires by means of a spring r and a contact '6, the spring r forming the armature of an electromagnet l, electrically connected with the rail a and with the wire ktoo by means of a wire s.

At the end of the field b the contact device h is arranged, having the same construction and the same connection to the rails h b and the wire is of this field, as well as the contact device 9 with the rails and wire of its field a. The arrangement of the contact device i, connected with the rails c c and the wire of the field c, is made similarly to that of the contact device of the field a. In the three contact devices similar reference-letters refer to similar parts, and the letters of the contact device I) and a have the additional numerals 1 and 2, respectively.

The locomotive has two contact-levers e and f. The lever f is provided with" two rolls f and o, insulated from each other and from the lever f and connected with the one terminal of the current-generator (Z by means of wires .2, while the roll 6 of the lever e is connected with the other terminal of the current-generator by means of a wire 2. With the wires .2 connecting the roll f and c with the current-generator a secondary conductor 2' is connected, in which alarm and safety apparatuses and a resistance 2 are put;

When the train A passes into the field a, (see Fig. 4,) the roll 0 slides over the wire 70, and a'secondary current flows from the rail a through the electromagnet Z, wire 8', wire 10, roll 0, and back to the currentgenerator, whereby the armature r is attracted and the electrical connection between the rails a and a is interrupted. The primary current flowing from the currentgenerator through the roll c and the rail a cannot pass any morethrough the contact device h, the rail a roll f, and back to the current-generator,but is compelled to fiow through the rail b of the field 1), wire '0 contact device 1', Wire 19 rail b rail a roll f, and back to the currentgenerator. However, when a resistance of a greater intensity than that of the resistance 2 put in the secondary conductor a is produced in the field I) through the loosening of a fish-plate or the breaking of a rail, the re sistance 2 will be overcome and the primary current flows through the secondary conductor 2" back to the current-generator and actuates in this way the alarm and safety apparatuses of the conductor ,2. In this mannor the field b is controlled by the currentgenerator in the field Ct. The same control of the field 0 may be efiectcd when the current-generator passes into the field b, where by the field a has become without current.

' ranged in thetrain, with a main-line circuit Having now described my invention, What I claim, and desireto secure by LettersPatvent; is'

1. In a device for preventing railroad accidents through break or loosening of rails,

the combination of a current-generator an adapted to "be put in electrical connection with the current-generator and consisting of the rails of the track and divided in'several fields, each field being connected by means of two wires witha contact device adapted to be put out of the circuit of the main line, a secondary-linecircuit comprising wires insulated from each other-at the end of each field of the main 1ine, sa;id circuit being connected with the main-line circuit through thecontact device and a secondary conductor on the cab connecting the terminal wires of the con rent-generator and containing a resistance and the alarm and safety apparatuses of the train,substantially as and for the purpose set forth.

' 2. In a device. for preventing railroad ac cidents through break or loosening of 'i'ails, the combination of a current-generator arranged in the train, With a main-line circuit adapted to be put in electrical connection with the eurrenbgenerator and consisting of the rails of the track and divided in several fields by means of wires, a secondary-line circuit comprising Wires insulated from each other at the end of each of said fields; said circuit being put in the circuit of the main line, a secondary conductor on the cab connecting 'the terminal WlIG'S'Of the currentgenerator andcontaining a resistanceand HERMANN BIERMANN.

Witnesses:

EWALD BoEHM, HERMANN BARTSCH.

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