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:
Sep. 21, 1982
Filed:
Jan. 04, 1980
Applicant:
Inventors:
Ryoichi Imanaka, Hirakata, JP;
Seizou Tsuji, Hirakata, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 43 ; 369 51 ; 360 73 ; 360 77 ; 360 86 ;
Abstract
A recording system of the type wherein the information is recorded on a spiral track on a disk-shaped recording medium, which is rotated by a signal transducer which is moved radially with respect to the recording medium. Both the rotational speed or angular velocity of the recording medium and the velocity of the radial movement of the signal transducer are so controlled, in response to the radial position of the signal transducer or the time elapsed after the recording was started, that the relative velocity of the signal transducer with respect to the recording medium may be always maintained constant.