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. 27, 1987
Filed:
Nov. 22, 1983
Akira Hirota, Chigasaki, JP;
Masahiko Tsuruta, Yokohama, JP;
Abstract
A rotary transformer is employed in a 4-head type recording and/or reproducing apparatus which has a rotary body which is wrapped with a magnetic tape, and four heads mounted 90.degree. apart from each other on the rotary body for recording and/or reproducing a video signal onto and/or from the tape. The rotary transformer device comprises a rotary core which has five circular grooves formed in one surface thereof and is rotated unitarily with the rotary body, a first short-circuiting ring embedded in a center groove among the five grooves of the rotary body, first through fourth ring-shaped coils embedded in the remaining four grooves of the rotary body, a stationary core which is stationary at a location separated from and opposing the rotary core and has five circular grooves, a second short-circuiting ring embedded in a center groove among the five grooves of the stationary core, and fifth through eighth ring-shaped coils embedded in the remaining four grooves of the stationary core. The first and second ring-shaped coils which are located on one side with respect to the first short-circuiting ring, are coupled to one pair of mutually opposing heads among the four heads. The third and fourth ring-shaped coils which are located on a side opposite from the one side with respect to the first short-circuiting ring, are coupled to the other pair of mutually opposing heads.