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:
May. 29, 1979
Filed:
Dec. 15, 1977
Richard G Delagi, Sharon, MA (US);
George Trenkler, East Providence, RI (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A magnetic transducer head has a plurality of magnetic laminations secured together in stacked relation to each other to form a magnetic core having a pair of pole faces disposed in spaced, facing relation to each other with a small gap therebetween and to define other surfaces of the core adjacent to the gap which are adapted for sliding engagement with the magnetic surface of a recording tape. Electrical coil means are inductively coupled to the core. Alternate magnetic laminations of the core incorporate materials of different magnetic and physical characteristics so that the laminations cooperate in determining the characteristics of the core. The materials of some laminations preferably display a relatively high maximum induction while other laminations incorporate materials having a relatively high initial permeability, thereby to facilitate use of the transducer both in recording and reproduction. Preferably the materials of some of the laminations have a relatively greater physical hardness than the materials of the other laminations to improve the wear characteristics of the core surfaces which are disposed in sliding engagement with the recording tape.