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. 08, 1977
Filed:
Feb. 12, 1976
Herbert D McClain, Quaker City, OH (US);
Bipin D Parikh, Cambridge, OH (US);
John K Burkey, Cambridge, OH (US);
NCR Corporation, Dayton, OH (US);
Abstract
A data communication system for asynchronously transmitting intermittently generated digitally encoded data between a data processor and a plurality of data terminals associated therewith is disclosed wherein the allowable communications line distance between the data processor and the terminals is substantially increased. Asynchronous data from the terminals is intercepted by a novel repeater, retimed in accordance with a newly generated retiming clock to eliminate bit-shift or other errors from the data, and retransmitted to the central processor over an extended length transmission line, with the repeater being substantially transparent to the flow of data. Decoding of an appropriate code by the repeater which is indicative of the receipt of a data character causes the switching from a data derived clock to a retiming clock for reencoding and retransmission of the data.