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:
Feb. 04, 1992
Filed:
Apr. 12, 1990
Sony Corporation, Tokyo, JP;
Abstract
A rotary head drum for a video tape recorder includes a stationary lower drum member having a base portion and inner and outer cylindrical portions extending generally upwardly from the base portion to define an internal cavity therebetween. A rotary assembly is rotatably mounted on a rotor shaft coaxial with the lower drum member and has at least one rotary magnetic head mounted thereto for recording digital signals on and reproducing the signals from a magnetic tape wrapped about the drum. A motor for driving the rotary heads, a rotation detector or tach generator for detecting the rotation of the motor, and a multi-channel rotary transformer for transferring digital signals to and from the rotary head are all housed in the cylindrical internal cavity surrounded by the base portion, and inner and outer cylindrical portions of the lower drum member which thereby reduces the overall axial height of the video tape recorder.