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:
Mar. 23, 1976
Filed:
Mar. 04, 1974
Claude Melvin Hurlocker, Raleigh, NC (US);
International Telephone and Telegraph Corporation, Nutley, NJ (US);
Abstract
There is disclosed herein a redundant carrier frequency selection arrangement for an FDM communication system. The selection arrangement includes a source of n pairs of carrier frequencies, where n is an integer including one. Each carrier frequency of one pair of the n pairs of carrier frequencies are equal and the carrier frequency of each pair of the n pairs of carrier frequencies are different. n plurality of FDM communication equipment requiring a carrier are coupled to the source of n pairs of carrier frequencies and each plurality of the communication equipment of the n plurality of communication equipment responds to a different pair of the n pairs of carrier frequencies. An electronic switch is disposed in each of the n plurality of communication equipment to select either one of the carrier frequencies of an associated pair of the n pairs of carrier frequencies.