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:
Feb. 03, 1987
Filed:
Dec. 07, 1984
Wayne D Crowe, Houston, TX (US);
Ferranti-Subsea Systems, Ltd., London, GB;
Abstract
A multiple-mode electrical power and communications interface includes a command encoder (10) modulating the frequency generated by a variable frequency power source (12) for transmission over one of two signal transmission paths (16/26) to a remotely located data acquisition and transmission network (32). The signal transmission paths (16/26) are connected via inductive couplers (20/24) to different directional control stages (50/52) which selectively enable corresponding frequency separators (54/62) for filtering the command component from the power component and applying the former to a command decoder (56). The direction control stages enable one of a pair of local transmitters (58/64) to send information encoded by a data encoder (60) over the other of the two signal transmission paths. A mode shifting transmit/receive switch (15) simultaneously and separately connects the two signal paths to the power source (12) and a data decoder (30). In the event of loss of one of the two signal paths, the mode shifting switch (15) can sequentially connect the power source (12) and data decoder (30) to the same signal transmission path.