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:
Jan. 03, 1995
Filed:
Mar. 22, 1993
Takayuki Okafuji, Kanagawa, JP;
Norio Tanaka, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A helical scanning type recording/reproducing apparatus provided with a dynamic tracking head which is moved in a direction perpendicular to a recording track on a magnetic tape and which is controlled by a movement controlling unit to trace the recording track accurately. The recording/reproducing apparatus includes a control phase data memory 10 for storing tape feed phase data, a head height data memory 6 for storing head height data during tracing by the dynamic tracking head and a control signal detection circuit 4 for detecting whether or not the control signals are being reproduced. When the control signals are not being reproduced, the head height position is controlled to be a predetermined head height position, based on data stored in the control phase data memory 10, at the same time that tracking control is performed based on the data stored in the head height memory 6 and the data corresponding to the current head height position.