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Magnetic Head

IP.com Disclosure Number: IPCOM000098625D
Original Publication Date: 1959-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 84K

Publishing Venue

IBM

Related People

Poch, LJ: AUTHOR [+3]

Abstract

Magnetic recording of digital information at high bit densities is achieved by a magnetic head having a core consisting of five laminations folded in a horseshoe shape. The inner lamination is longer than the other laminations. Hence, portions of the legs of the folded inner lamination extend beyond the other laminations to form pole pieces, while the other laminations, all being of the same length but having different radii of curvature, form steplike backing laminations for the purpose of decreasing the reluctance in the core path and adding some stiffness to the core assembly.

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Magnetic Head

Magnetic recording of digital information at high bit densities is achieved by a magnetic head having a core consisting of five laminations folded in a horseshoe shape. The inner lamination is longer than the other laminations. Hence, portions of the legs of the folded inner lamination extend beyond the other laminations to form pole pieces, while the other laminations, all being of the same length but having different radii of curvature, form steplike backing laminations for the purpose of decreasing the reluctance in the core path and adding some stiffness to the core assembly.

The inner surfaces of the longer portions of the inner lamination contain electrically deposited copper which effectively forms a gap between the pole pieces.

Each leg of the core is embraced by a coil having leads extending into holes in a terminal block disposed within a housing having an inner conical contour for locating the pole pieces therewithin. The housing is provided with a small opening through which the pole pieces are exposed.

The terminal block, as well as the laminations of the core, are apertured to receive a locating stem of a cap member for the housing. The housing is slotted at its upper end for the purpose of permitting the entrance of lead wires tipped with taper pins, which are adapted to plug into the holes in the terminal block and make contact with the leads of the coil windings. The slot in the housing also enables encapsulation of the elements wit...