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:
Oct. 07, 1980
Filed:
Aug. 30, 1977
John M Holland, Shawsville, VA (US);
International Telephone and Telegraph Corporation, New York, NY (US);
Abstract
A control system for the simultaneous and independent transmission of a plurality of command signals includes a transmitting device and a receiving device interconnected by an optical waveguide. The transmitter simultaneously receives a plurality of command signals at parallel inputs and converts the signals to consecutive serial signals which are utilized to modulate a light source that is optically coupled to the optical waveguide. The receiver detects the consecutive serial optical signals and generates corresponding electrical signals which are thereafter converted to simultaneous parallel output signals that may be used to activate command functions. The unique use of an optical waveguide provides for dielectric isolation between the transmitter and receiver so that an operator may be electrically isolated from potentially dangerous high voltage equipment. The system is particularly useful in areas subjected to electromagnetic interference where radio-type controls or hard-wired metallic conductors would be adversely affected by strong electromagnetic interference.