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Two gap read/write head assembly

  • US 3,959,824 A
  • Filed: 01/25/1974
  • Issued: 05/25/1976
  • Est. Priority Date: 11/30/1970
  • Status: Expired due to Term
First Claim
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1. In a two gap read/write head assembly used for magnetic recording which comprises a housing, a write pole-piece contained in said housing, a read pole-piece contained in said housing and placed very close to said write pole-piece followingly to said write pole-piece in the direction of motion of a magnetic recording medium, respective gaps of said write pole-piece and said read pole-piece being exposed out of said housing so that said gaps may be engaged with said magnetic recording medium, a write coil wound to said write pole-piece, and a read coil wound to said read pole-piece, magnetic shield means interposed between said pole-pieces to assist in reducing feedthrough signal due to stray fluxes therebetween, an improvement comprising a pair of auxiliary pole-pieces placed at both sides of said read pole-piece so that said read pole-piece is placed between said auxiliary pole-pieces, respective gaps of said pair of auxiliary pole-pieces being aligned to the gap of said read pole-piece, and auxiliary coils wound to said respective auxiliary pole-pieces reversely to said read coil in the winding direction, said auxiliary coils and said read coil being connected in series.

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