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:
Sep. 21, 1978
Claude J Gergaud, Cagnes sur Mer, FR;
Etienne Grimanelli, Vence, FR;
Andre G Tracol, Cagnes sur Mer, FR;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Described is a decentralized data transmission system and a method of operating the system. A relatively high speed transmission medium connects a number of relatively lower speed terminals in a loop or similar configuration. A central or monitoring station is connected in the transmission medium which includes a memory table containing the listing of the station addresses connected to the transmission loop. The monitoring station operates as a control station for transmitting the address of a first station to be enabled to transmit a message. The addressed station recognizes its address and responds either with a message destined for another station or with a signal that no message is to be sent. At the end of a message, an enabled station sends a special character to notify the monitoring station that the next station in the memory table can be addressed to grant usage of the transmission medium.