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:
Jun. 24, 1980
Filed:
Oct. 02, 1978
Herbert U Ragle, Thousand Oaks,, CA (US);
Norman S Blessum, Thousand Oaks,, CA (US);
Burroughs Corporation, Detroit, MI (US);
Abstract
Techniques and associated apparatus for recording and detecting data; and especially for detecting and processing recorded data with greater accuracy. Recording information (computer data bits) is recorded in 'A-form' or 'B-form' as oblique parallel marks along adjacent information strips (tracks) on a medium, using a 'di-gap' transducer system comprising at least one related pair of transducer gaps aligned to register and sense information along a common record track, with the gaps being skewed oblique to the track direction, and aligned transverse to one another to register with respective A-form or B-form marks. One form of mark is preferably recorded along the ODD-number tracks, at a first frequency (f.sub.1) while the other form of mark is recorded along the EVEN-number tracks at a second, different frequency (f.sub.2). Output detect means are arranged to distinguish between these frequencies for improved recording (--e.g., head-position-servo control).