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:
Apr. 04, 1995
Filed:
Oct. 26, 1992
Nobuyuki Ishiwata, Tokyo, JP;
Toshiyuki Okumura, Tokyo, JP;
Haruo Urai, Tokyo, JP;
Mitsuo Tamura, Miyagi, JP;
Masataka Konno, Miyagi, JP;
NEC Corporation, Tokyo, JP;
Tokin Corporation, Miyagi, JP;
Abstract
In order to improve a wear resistance and recording and reproducing properties of a magnetic head which has a magnetic core having a magnetic gap and a penetrated hole, a pair of reinforcing members holding the magnetic core therebetween, each having an opening corresponding to the penetrated hole, and a winding wound onto the magnetic core and the reinforcing members through the penetrated hole and the opening, each of the reinforcing member is a non-magnetic substrate which is made of a ceramic material essentially consisting of 2-30 weight % CaO, 2-50 weight % TiO.sub.2, and 30-80 weight % NiO and having an average grain size of 2 .mu.m or less. Alternatively, another ceramic is used which essentially consists of 2-30 weight % CaO, 2-50 weight % TiO.sub.2, 30-80 weight % NiO, and 0.2-1 weight % Al.sub.2 O.sub.3, and having an average grain size of 2 .mu.m or less, excluding zero.