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. 13, 1977
Filed:
Dec. 05, 1975
Applicant:
Inventor:
Barry Sheldon Bosik, Parsippany, NJ (US);
Assignee:
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ; H02J / ;
U.S. Cl.
CPC ...
320 21 ; 179 / ; 320 23 ; 363 16 ;
Abstract
A single channel carrier system for telephone service is disclosed including at the remote terminal a battery charger for charging a battery which powers the carrier electronics at the remote terminal. A ringing generator and supervisory circuits are disclosed to provide normal telephone supervison on the carrier-derived channel. The battery charger includes a dc-to-dc converter to increase the rate of battery charging and an interface unit to minimize the effect on the telephone line by the charger. In one embodiment, the interface unit disconnects the charger to permit leakage testing of the line.