Spare channel system for sectionalizing a communication line circuit

Abstract

Abstract A COMMUNICATION LINE CIRCUIT CONNECTS A CONTROL OFFICE STATION WITH A PLURALITY OF SUCCESSIVE REMOTELY SPACED FIELD STATIONS. AN AUXILIARY LINE CIRCUIT EXTENDS FROM THE CONTROL OFFICE TO THE MOST REMOTE FIELD STATION. THE COMMUNICATION LINE CIRCUIT IS NORMALLY ENERGIZED, AND A LINE DETECTOR RELAY AT EACH STATION SENSES SUCH ENERGIZATION. IN CASE OF LINE CIRCUIT FAILURE, THE DROPPING AWAY OF THE DETECTOR RELAYS AT VARIOUS STATIONS ACTIVATES SECTIONALIZING MEANS AND INDICATORS AT THE CONTROL OFFICE MANIFEST THE GENERAL AREA OF THE FAILURE. CONTROLS FOR DESECTIONALIZATION CAN BE TRANSMITTED FROM THE CONTROL OFFICE TO THE SEVERAL FIELD STATIONS TO PUT THE LINE CIRCUIT BACK TOGETHER STATION-BY-STATION AS DESIRED TO COMMUNICATE WITH FIELD STATIONS AHEAD OF THE FAILURE DIRECTLY FROM THE CONTROL OFFICE OVER THE COMMUNICATION LINE CIRCUIT AND TO COMMUNICATE WITH FIELD STATIONS BEYOND THE FAILURE THROUGH THE SECTION OF THE COMMUNICATION LINE CIRCUIT BEYOND THE FAILURE AND OVER THE AUXILIARY LINE CIRCUIT TO THE CONTROL OFFICE.

Inventors

• 👤 William M Barker

Bibliographic Details