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| Number | Title | Issue Date |
| 4118747 | Composite magnetic head A composite magnetic head including a record/playback gap and an erase gap comprises a straight central core, a pair of arcuate lateral cores having their ends disposed in opposing relationship with the opposite ends of the central core disposed therebetw... | 10/03/1978 |
| 4115827 | Magnetic transducer for narrow track recording and playback A transducer core having a magnetic core defining a non-magnetic gap and being integrally joined with a superposed composite body. The composite body has a nonmagnetic front portion spanning the nonmagnetic gap and a contiguous magnetic back portion. The ... | 09/19/1978 |
| 4100584 | Transducer head with narrow core structure In the manufacture of a transducer head, a plurality of elongated slots are formed in a non-magnetic substrate to receive magnetic cores having a transducing gap. A sealing composition bonds the cores in the slots and the cores are then laser trimmed to p... | 07/11/1978 |
| 4091429 | Device for the magnetic recording by means of a magnetic strip domain as a recording/playback head The invention relates to a device for magnetic recording which is provided with a layer of a magnetizable material which is provided on a support and has an easy axis of magnetization which is at least substantially perpendicular to the plane of the layer... | 05/23/1978 |
| 4086639 | Magnetic head which minimizes the effect of minute variations in the head gap The magnetic head of the present invention has a core thickness set up in accordance with the range of the permeability drop starting frequency of the core material which is determined to reduce the influence imparted to the reproducing frequency characte... | 04/25/1978 |
| 4085429 | Magnetic head having optimum spacer thickness disposed between dummy and write-in core segments In a magnetic head comprising a write-in excitation core and a read-out excitation core having a narrower track width than that of the write-in excitation core and forming a closed magnetic circuit with a gap interposed between the two cores, a non-magnet... | 04/18/1978 |
| 4084199 | High density multitrack magnetic head The front face of a multitrack magnetic head has a stack of track defining pole pairs and spacers between the pole pairs of adjacent tracks. The spacers are slotted, and shields reside in the slots. A chamfer runs longitudinally of the stack. Embracing op... | 04/11/1978 |
| 4079430 | Magnetic head Amorphous metal alloys are employed in a magnetic head as core materials in the present invention. Such alloys are generally composed of M and Y, wherein M is at least one of Fe, Ni and Co and Y is at least one of P, B, C and Si. The amorphous metal alloy... | 03/14/1978 |
| 4072993 | Multi-element magnetic head A multi-element magnetic head having a plurality of magnetic heads, in which a common electrode common to the coils of the individual heads is provided. By this construction the number of electrodes is reduced and also the area required for contact betwee... | 02/07/1978 |
| 4044394 | Thin film magnetic head with a center tap A narrow track width magnetic head can be formed using an integrated circuit formation techniques such as evaporation plating, chemical etching, etc. But, there has been such a problem that it is difficult to provide a center tap in a conventional thin fi... | 08/23/1977 |
| 4024583 | Magnetic head A magnetic head, in particular for erasing video tapes over their full width. To permit arranging the head as closely as possible to the head wheel with the video heads, it has a circular-symmetrical construction and is placed together with a guide drum o... | 05/17/1977 |
| 4012783 | Magnetic head A magnetic head comprises a pair of core pieces with a spacer interposed therebetween which defines a gap, a yoke which interconnects the ends of the both core pieces located remote from the gap, a bobbin into which the both core pieces and the yoke are f... | 03/15/1977 |
| 4009491 | Distortionless modulation head A magnetic head with capability of eliminating or attenuating distortion having a magnetizable core and coil means formed thereon. Some cores have cavities internal thereto, one has no cavity and another has a window therein. All cores are tapered and mos... | 02/22/1977 |
| 4001841 | Recording head array with passive pole A recording head array for magnetic printing machines comprises a flat sheet pole spaced from a line of magnetic pin poles. Spaces between image elements recorded by adjacent poles are thereby reduced. The sheet pole may be magnetized to provide a direct ... | 01/04/1977 |
| 3999216 | Material for magnetic transducer heads A magnetic head assembly wherein the material of the pole tips or of the pole pieces comprises a hot-pressed sintered iron-silicon-aluminum alloy, the particles of such alloy preferably being provided with a nitride layer or coating prior to sintering for... | 12/21/1976 |
| 3986210 | Magnetic head device using printed circuit techniques A small magnetic head is directly formed on a semiconductor substrate by using diffusion or evaporation techniques. A number of such small magnetic heads may be formed on the same substrate with high precision and high uniformity, and this is useful for c... | 10/12/1976 |
| 3978523 | Multi-channel dual-gap magnetic head A multi-channel dual-gap magnetic head. The head has a plurality of magnetic head tips which are separated magnetically from each other by non-magnetic materials, and each having two magnetic gaps. A plurality of magnetic back cores are connected to said ... | 08/31/1976 |
| 3947889 | Electromagnetic transducers An electromagnetic transducer based on the magnetoresistive effect is made of a stack of members each of which comprises a magnetoresistive layer enclosed, with interposition of non-magnetic insulating layer, between two thicker high permeability layers, ... | 03/30/1976 |
| 3943570 | Semiconductor magnetic head A semiconductor magnetic head in which a polycrystal thin film of a semiconductor material containing at least a crystal particle having a longitudinal diameter of at least 30 μm is employed as a magneto-sensitive element is disclosed. The semiconductor ... | 03/09/1976 |
| 3940797 | Shielded magnetoresistive magnetic transducer A magnetoresistive (MR) layer is placed offcenter the distance between two shields to enhance self-biasing. Information is carried on a magnetizable medium as recorded magnetic areas. The shields are spaced apart by a distance on the order of and less tha... | 02/24/1976 |
| 3936884 | Magnetic tape head with clamped core holders A magnetic tape head includes a pair of core holders containing the core elements of magnetic cores. The tips of the magnetic cores are urged towards each other when the core holders are clamped in abutting relation by a metallic U-shaped clip. The bight ... | 02/03/1976 |
