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, 1981
Filed:
Feb. 22, 1979
Alan J Fisher, Huntsville, AL (US);
Other;
Abstract
A system for reading binary digital data, represented by two possible spacings between abrupt flux reversals appearing on a magnetic track of a credit card, as the credit card is transported by hand by and in engagement with a magnetic head of the system. A read head having an unusually large read aperture is used to translate the two possible encoded lengths into two possible waveform amplitudes which are independent of transport speed. Then, by means of amplitude discrimination, the '0' bits are detected; and by zero slope detection, the '1' bits are detected. Mechanically, the read head is located centrally in an obtusely angled long side of a housing and is opposed by a contoured Teflon pillow that substitutes for one-half of the usual card slot. This unidirectional pillow is shaped and spaced from the head so as to cause the credit card to be slightly bent around the head's face in passing.