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:
Aug. 02, 1977
Filed:
Sep. 12, 1975
John F Bagby, Encinitas, CA (US);
Spin Physics, Inc., San Diego, CA (US);
Abstract
In a video head assembly employing ceramic-ferrite transducer heads, the present invention proposes modification of head assembly components, i.e., the recording tape vacuum guide and the head wheel, so that a head assembly may be provided which possesses an operating lifetime commensurate with the ceramic-ferrite transducer heads. The invention proposes a head wheel having an outer surface which will wear to an unacceptably out-of-round condition at a significantly slower rate than present head wheels. To complement the proposed head wheel, the invention further proposes a tape guide having a guide surface so constructed as to wear more slowly than present tape guides so the radius as defined by the SMPTE will be maintained for more tape hours, thus helping to retain the proper guide surface contour throughout the life of the transducer heads.