US352700A

US352700A - Sidney

Info

Publication number: US352700A
Authority: US
Publication date: 1886-11-16
Anticipated expiration: 1903-11-16

Description

llNiTEn STATES PATENT OFFICE SIDNEY o. MAHANAY AND BEN. L. CAMPBELL, on NEAR MANCHESTER, Mo.

ELECTRIC'RAILWAY-SIGNAL.

SPECIFICATION forming part of Letters Patent No. 352,700. dated November 16, 1886.

being had to the accompanying drawing, and

' to the letters and figures of reference marked thereon, which form a part of this specification.

The figure of the drawing represents a plan view of the invention. I

This invention relates to an improved electric alarm to be placed at a railroad-crossing; and it consists in the devrcvfifeih'aftefset forth.

In the annexed drawing, the letter A indicates a portion of a railroad-track at an ordinary crossing. On oneside orline of rails are three sections, a b 0, insulated from one an other and the rest of the rails. On the opposite section, parallel with these three sections, is another section, d, coextensive with the three sections a b 0, and in like manner insulated from the rest of the track. At a convenient distance from the track are placed an alarm, B, and relay 0, and battery D. A wire, E, connects the battery-with the track-section d. Running from the batteryD to the alarm 13 is a wire, I). This wire b is connected also by another, b with the binding-post o of the relay, from which post the wire 0 connects with relay-coils, and another wire, 0 passes thence to the other bindingpost, 0. A wire, b connects this post 0 with the middle track-section, b, and another wire, 0 connects said post a with the armature front stop, f. The back stop, f, is connected with the alarm by a wire, f tions at and c are connected by a bridge-wire, at, around the section b, and from this bridgewire runs another wire, of, connecting with the wheel of the armature F, the latter nor mally resting against the back stop, f, and therefore normally open. This produces five metallic circuits. One includes the middle section,- b, and section d, passing through the p The two sec Application filed April 14, 1886. Serial No. 198,825. (No model.)

other four consist of two sets of two circuits each, one set including sections a and d, the other set sections 0 and 01, each set including an alarm-circuit which has the relay-armature as part thereof, and another circuit which includes the relay-coils and the relay-armature. The alarm-circuit is open at the track only, and the other at the track andthe armature.

a As a train approaches in the direction of the arrow 1, as soon as the front wheels touch the sections d and a the alarm-circuit is closed through the engine, section d, wire E, battery D,wire b, alarm B,wire f backstop f, armature F, wire a bridge-wire a", and section a, and the alarm is sounded. This circuit continues closed until the front wheels reach the section b, when the shorter circuit through sec- ,circuit, and the alarm ceases. As the train passes onto section a, the circuit from section b continues closed until the whole train leaves such section b. At thevery instant this takes place, the armature F being closed, a circuit is formed throughthe train, section cl,wire E, batteryD, wires 1) c relay-coils, wires 0 0 front stop, f, armature F, wires a a and section 0. I and prevents the alarm-circuit being closed through the track-section c, which would hap-- pen were the armature allowed to fall open. As soon as the train leaves the section 0, the armature falls open, and, resting against the back stop, the alarm-circuit is ready for another train. Should a train approach in the direction of arrow 2, the same action would ensue. The alarm-circuit would be closed through sections (2 and 0. wires a a", and .E, and the This still holds the armature closed,

other parts, as already described, then the rewhen the train approaches the crossing, the other circuit being to keep the alarm-circuit broken as the train passes the section in leaving the crossing.

Having described our invention, What we claim is 1. The combination of the sections a b c of one line of track-rails and the section d of the other line of track-rails, sections 2) and 01 being parts of a re1ay-circuit, which circuit is normally open, the armature resting on the back stop, and sections a and d and c and (1 being, each set, parts of an alarm-circuit which includes the relay-armature, and each set also parts of another circuit which includes the relay-coils and relay-armature, as set forth.

2. The combination of the sections a, b, c,

in presence of two witnesses.

SIDNEY O. MAHANAY. BEN. L. CAMPBELL.

Witnesses:

W. J. HOLLOOHER, FRANK J. HOFSTETTER.

Correction in Letters Patent No. 352,700.

It is hereby certified that in Letters Patent No. 352,700, granted November 16, 1886, upon the application of Sidney O. Mahanay and Ben. L. Campbell, of near Manchester,

Missouri, for an improvement in Electric Railway-Signals, an error appears in the printed specification requiring the following correction: In line 48, page 1, the Word Wheel should read heel and that said Letters Patent should be read with this correction therein that the same'may conform to the record of the case in the Patent Office.

Signed, countersigned, and sealed this 23d day of November, A. D. 1886.

[SEAL-.1 D. L. HAWKINS,

Acting Secretary of the Interior. Gountersigned:

R. B. VANCE,

Acting Commissioner of Patents.