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:
Jul. 07, 1987
Filed:
May. 01, 1984
Jacques Lewiner, 92210 Saint Cloud, FR;
Claude Hennion, 75005 Paris, FR;
Other;
Abstract
For reading a coded sequence of magnetic signals recorded on a card, which sequence is formed of bits of identical duration the reading of which results, for the 0s, in a single change of level of an electric voltage, and for the 1s, in two such changes evenly spaced apart in time, the real duration of each bit read is measured, and the time of identification of each bit is adjusted depending on the real duration t.sub.0 of the preceding bit and on the nature of this preceding bit by giving to the time interval T which separates the end of reading of this preceding bit and the time of identifying the following bit, if the preceding bit is a 1, a value T.sub.1 equal to 5/8 of t.sub.0 or to 11/16 of t.sub.0 and if the preceding bit is a 0, a value t.sub.0 equal to 7/8 of t.sub.0, or else equal to 13/16 of t.sub.0 if the bit preceding the above 0 was again a 0 and to 15/16 of t.sub.0 in the opposite case.