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US 4,382,269 AGranted
Magnetic head
AssigneesCanon Kabushiki Kaisha, Canon Denshi Kabushiki Kaisha
InventorMinoru Kato
Life of this patent
Estimating the term…
Abstract
The magnetic head of the present invention has plural core members in abutting relation to form a magnetic circuit in which one of the core members is notched deeper than the other to suppress the saturation and leakage of magnetic flux, and in which one of the core members is notched deeper than the lateral end of the coil facing the magnetic tape and even with the approximate center of the coil to reduce the distortion.
Claims18
A magnetic head comprising:
- a first magnetic core made of material having high magnetic permeability and providing a first sliding surface for a tape;
- a coil wound on said first magnetic core;
- and
- at least one second magnetic core mounted adjacent said first core and made of material having high magnetic permeability, said second core being formed with a protrusion providing a second sliding surface for a tape, which defines a common sliding tape surface with said first sliding surface provided by said first core, and a stepped recess extending from said protrusion to a terminal region, one end of said coil wound on said first core being intermediate said sliding surfaces and said terminal region.
1 more element
A magnetic head comprising:
- a first magnetic core made of material having high magnetic permeability and formed with a stepped protrusion defining a first sliding surface for a tape;
- a coil wound on said first magnetic core;
- and
- at least one second magnetic core mounted adjacent said first core and made of material having high magnetic permeability, said second core being formed with a stepped protrusion defining a second sliding surface for a tape, which defines a common sliding tape surface with said first sliding surface defined by said first core, and a stepped recess extending from said second sliding surface to a terminal region, one end of said coil wound on said first core being intermediate said sliding surface and said terminal region.
1 more element
A magnetic head comprising:
- a first magnetic core made of material having high magnetic permeability and formed with a stepped protrusion defining a first sliding surface for a tape;
- a coil wound on said first magnetic core;
- a plurality of second magnetic cores each mounted adjacent a different side of said first core and made of a material having high magnetic permeability, each of said second cores being formed with a stepped protrusion defining a second sliding surface for a tape, which defines a common sliding tape surface with said first sliding surface defined by said first core, and a stepped recess extending from said second sliding surface to a terminal region, one end of said coil wound on said first core being intermediate said sliding surfaces and said terminal regions;
- and
- a block made of non-magnetic material defining a U-shaped face and filling a void defined by said protrusion on said first core and said stepped protrusions and said recesses on said second cores.
2 more elements
A magnetic head comprising:
- a first magnetic core of material having high magnetic permeability and formed with a stepped protrusion defining a first sliding surface for a tape and a recess extending from said first sliding surface to a first terminal region;
- and
- at least one second magnetic core mounted adjacent said first core and made of material having high magnetic permeability, said second core being formed with a stepped protrusion defining a second sliding surface for a tape, which defines a common sliding tape surface with said first sliding surface defined by said first core, and a stepped recess extending from said second sliding surface to a second terminal region, said first terminal region being intermediate said sliding surfaces and said second terminal region.
A magnetic head comprising:
- a first magnetic core made of material having high magnetic permeability and formed with a sliding surface for a tape;
- a coil wound on said first core;
- and
- a pair of second magnetic cores each mounted adjacent said first core and made of material having high magnetic permeability, each of said second cores being formed with a recess therein, permitting a side face of said core to be exposed through each of said second cores.
1 more element
Dependencies are inferred from the claim text.