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. 03, 1992
Filed:
Mar. 16, 1990
Walter Braun, Wettingen, CH;
Walter Hagmann, Suhr, CH;
Datawatt B.V., Wolvega, NL;
Abstract
A method of exchanging data in a network having a master station (M), at least one subscriber station and a common data channel according to a hierarchical token-passing principle comprises the following steps: a) at the start of the data exchange the master station (M) has sole possession of the control token; b) in order to initiate a data exchange the master station (M) sends a telegram with a time limit (T0L) specified by it to at least one receiver (E1); c) at least one receiver (E1) accepts the control token for a period limited by the specified time limit (T0L); d) at least one and every subordinate further receiver (E1, E2, E3) either passes the control token with a telegram and a further time limit (T1L, T2L) not exceeding the specified time limit (T0L) on to a subordinate further receiver (E2, E3), or allows the specified time limit to expire without relinquishing the control token; e) after expiry of the time limit (T0L) specified by it, the master station (M) again accepts sole possession of the control token.