The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 1976
Filed:
Mar. 27, 1975
Frederick Henry Koster, Granite Springs, NY (US);
American Telephone and Telegraph Company, New York, NY (US);
Abstract
In a cable restoration system neon devices and light-emitting diodes are utilized to identify corresponding conductors in a broken cable by an arrangement that does not require the assistance of a lineman at the central office. The apparatus identifies a central office line by means of a neon device and ringing bridge arrangement which replaces the neon indicating bulbs used in prior art systems. After identifying a customer line at a cable break by using indicating devices in a conventional manner, a maintenance man at the break location dials the central office over a spare pair. When ringing is applied to the desired central office line, a glow discharge occurs in the neon device, which discharge heats a bi-metallic strip and causes the strip to move and establish a metallic short across the line. The short trips ringing extinguishing the discharge. The bi-metallic strip cools and the short is removed from the line. The maintenance man then applies a high frequency tone signal to the spare pair which signal appears on the desired line after passing through the central office. The tone is detected by a ringing bridge and used to illuminate a light-emitting diode which identifies the desired line.