Abstract: A magnetic head assembly comprising a read/write head unit adapted for reading and writing data and provided with a magnetic core 1 having a thin sheet of an Mn-Zn ferrite. The magnetic head assembly also has erase head units bonded to the read/write head unit and adapted to erase the edges of the data, each of the erase head units being provided with a magnetic core 2 having a thin sheet of an Ni-Zn ferrite. The read/write head unit and erase head units are bonded by means of a glass 6.

Abstract: A magnetic disk recorder which applies an azimuth recording system and which can use all of the tracks of a magnetic disk. In particular, a plurality of magnetic head chips, each of which is formed with a head gap having a predetermined azimuth angle, are respectively assembled into separate head sliders along with dummy heads, and the head sliders are driven by separate actuators.

Abstract: A magnetic reading head includes two juxtaposed magnet cores each having a reading gap and an electric winding. The reading gaps are in alignment and each gap has a width which is at most equal to half the width of the information track to be read.

Abstract: This invention relates to a magnetic head for providing azimuth information therefrom relative to a signal recorded on a magnetic tape. The magnetic head of the invention has first and second coils for providing a reproduced signal corresponding to a recorded signal on the entire width of a recording track and a reproduced signal corresponding to a recorded signal on a part of width of the said recording track.

Abstract: Optically or visually perceptible lapping and grinding patterns are provided in a thin film transducer structure by depositing conductive material both between the magnetic pole pieces and, external to such pole pieces. The conductive material between the pole pieces is so positioned as to determine the zero throat point of the transducer and is in predetermined aligned relationship with the external pattern by, for example, being formed during a single masking step.

Abstract: A thin film head array has at least two stacks, each stack having a selected number of recording heads. The two stacks are joined such that the gaps in the heads of the first stack are interleaved with respect to the gaps in the heads of the second stack, and when such an array is used for recording and reproducing data on a magnetic medium, a plurality of recording tracks are provided. In a second embodiment, two assemblies, each having a plurality of stacks according to the first embodiment, are joined in a V-shape. Each gap in the heads of each stack occupies separate tracks on the recording medium and each recording gap has a magnetizing orientation that is 3.degree.-15.degree. with respect to that of the adjacent heads.

Abstract: A magnetic head for writing and/or reading information in mutually parallel tracks of a magnetic recording medium includes a transducing gap having a depth of the same order of magnitude as the longest wavelength on the recording medium. The gap also has a slope of less than or equal to 45.degree. relative to the head surface which faces the medium.

Abstract: A method for making magnetic recording heads suitable for mass production with high accuracy.The track width tw or w of the head core is defined by a photolithographic etching method.First, larger grooves are formed by mechanical machining or electrolytic etching to form an outline of the pole piece parts, and then further smaller and shallower grooves are formed with very high accuracy by an etching process, such as electrolytic etching, sputter etching or ion etching at the edges of the first grooves. Thus, the track width of the head core is accurately determined by means of a photolithographic process.

Abstract: A single multi-track head having a plurality of head gaps aligned on a center axis thereof is arranged to assume respectively first and second inclined positions with respect to a transverse axis of a magnetic recording tape. The number of the head gaps equals a half of the total number of tracks to be formed on the tape, and the head gaps are equidistantly spaced so that only odd tracks are formed to record a digital signal when the tape runs in one direction with the multi-track head in one of the first and second inclined positions. When the tape has come to the end, the tape is turned upside down to continuously record the digital signal on even tracks. Before forming the even tracks, the multi-track head is manually or automatically operated to assume the other inclined position. With this operation, the odd and even tracks have different azimuths from each other preventing cross-talk between adjacent tracks.

Abstract: A magnetic head for acoustic instruments. The head is composed of at least two units. Each unit, in turn, is composed of a shielding case half, a core holder, cores, etc. The core holder and/or the cores are easily positioned in the shielding case half at the time of assembly of the unit. The units are joined to each other to form a complete magnetic head.

Abstract: A composite head structure having a front core consisting of a non-magnetic spacing device for separating a read-write magnetic flux path from an erase magnetic flu path and first and second core chips adhered together with the spacing device interposed between them. A read/write gap is formed at the central portion of the first core chip which is parallel to the longitudinal direction of the spacing device and whose width is defined by first and second notches which extend from respective side edges of the first core chip. Erase gaps are formed in the second core chip which extend between the side edges of the second core chip parallel to the longitudinal direction of the spacing device and whose widths are defined by a third notch formed at a position substantially corresponding to the read/write gap as viewed along the direction of the arrangement of the first and second core chips.

Abstract: A thin film magnetic read/write transducer has a substrate of magnetic material forming a pair of disparate pole pieces. Arranged adjacent a movable magnetic medium, the disparate pole pieces are constructed so that the leading pole piece has a greater distal surface area than the trailing pole piece. In an alternative arrangement the leading pole piece distal surface is disposed a greater distance from the medium than the trailing pole piece. In yet another arrangement the trailing pole piece distal surface is disposed at an acute angle to the medium, and the leading pole piece surface may be at a lesser angle or parallel to the medium. The disparate pole pieces, so constructed and arranged, introduce compensating non-linearities to the writing magnetic field to substantially counteract the non-linear properties of the medium and of the recording process.

Abstract: A method for delineating vertically configured thin film magnetic heads formed upon silicon wafer substrates. A plurality of thin film magnetic head arrays are formed on a (110) oriented surface of a single crystal silicon substrate so that the edges of the arrays are aligned parallel to the {111} planes of the substrate. Following photolithographic formation of a mask, ion beam milling perpendicular to the (110) oriented surface of the silicon substrate delineates the thin film magnetic head array structures. Thereafter, the remainder of the silicon substrate is anisotropically etched to completely delineate the individual array structures.

Abstract: A magnetic head suitable for a reversible stereo cassette tape recorder is disclosed. The magnetic head had a larger operating gap for the recording head than for the reproducing head. This is accomplished by a thicker spacer between the core pieces for the recording head than for the reproducing head. The two spacers are in line, and the core pieces are held on one hand by a common holding member and on the other hand by separate lower and upper holding members.

Abstract: A multitrack magnetic head is made from an electrically conductive first helix formed on an iron wire that is, in turn, wound to form a second helix. By cutting or lapping a longitudinal flat along one side of the second helix, the first helix is severed into respective discrete coil-wound gapped cores.

Abstract: In a multichannel head of the type wherein a plurality of transducers scan signal tracks of information across a magnetic tape within a system; and wherein each transducer includes a magnetic core having two pole pieces between which a gap is disposed while at least one turn of a conductor is magnetically coupled to the gap, the plurality of transducers are sequentially bonded together in an integral unit with their gaps disposed at essentially tandem locations.

Abstract: The invention relates to recording and reading heads used in the field of magnetic recording.In the case where the same magnetic head serves for these two operations, the invention proposes giving to the two rectangular facing polar surfaces defining the effective air gap, different transverse dimensions, leading to a wide recorded track due to the leakage flux and a narrow read track. This difference minimizes the influence of lateral instability in movement of the mobile magnetic support medium.

Abstract: A thin film inductive transducer is shown comprising three magnetic layers (10, 11, 12) deposited on a slider substrate (13) for perpendicular recording of magnetic transitions on a movable magnetic medium. Two magnetic closures are provided. One is defined by electrical contact of one outer magnetic layer (12 or 10) with the intermediate magnetic layer (11 or 11') within the area bounded by conductive turns (a-h) of single layer coil (19 or 19'). The other is defined by electrical contact (10, 12 or 10', 12') outboard of the conductive turns (a-h). Magnetic transitions may be read by conventional peak detection techniques because the disclosed transducer has three pole tips (P1, P2, P3), the central one P2 of which is approximately 33-40% of the thickness of the outer pole tips (P1, P3). To avoid "wrap-around", the pole tips (P1, P2, P3) are progressively narrower in width as their distance from the substrate (13) increases.

Abstract: A multielement magnetic head is formed with a closure section having a nonmagnetic ceramic substrate on which a thin layer of magnetic ferrite is deposited and processed. The thin ferrite layer is cut to define the separate transducing elements and data track separation. The closure section is joined to a wafer formed from a ferrite substrate and a thin film conductive coil means.

Abstract: In a two-head helical scan video tape recorder, a pair of rotary erase heads are provided, and in order to avoid undesirable erasure by fringe flux, each rotary erase head integrally formed with one of two video recording heads and is positioned on a rotary member so that the scanning position thereof is always displaced from the scanning position of the associated video recording head by at least one video track interval in the scanning direction of the heads, in case of guardbandless azimuth recording.

Abstract: A multichannel magnetic head has a Hall element which is disposed in a magnetic circuit which is traversed by a magnetic flux to be detected and which is used as magnetic/electric converting means. The Hall element comprises an amorphous magnetic thin film consisting of an alloy containing a rare earth element and a transition metal. To the amorphous magnetic thin film are connected a pair of current terminals and a plurality of Hall voltage terminals corresponding in number to the number of channels of the multichannel head, and the amorphous thin film is arranged in magnetic circuits of a plurality of channels.

Abstract: A tape recorder employing a miniature tape cassette and capable of automatic reversible operation is provided, including a pair of record/playback magnetic heads. One of the heads is disposed so as to be aligned with a track or tracks on a magnetic tape which are available for record or playback operation during the time the tape runs in a forward direction while the other head is disposed so as to be aligned with a track or tracks on the tape which are available for record or playback operation during the time the tape runs in a reverse direction.

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.

Abstract: A multi-channel magnetic transducer head is formed by combining two core blocks with a magnetic gap therebetween. On the confronting surface of one of two core blocks, there is provided a plurality of parallel grooves. On the confronting surface of another core block, there is provided a gap defining a groove extending perpendicular to the parallel grooves. A plurality of first conductor strips are formed on the confronting surface of the one core and in the parallel grooves and the strips extend in the direction substantially perpendicular to the parallel grooves. Another surface of the one core opposite to the confronting surface is ground until the conductor strips are disposed on the surface and the cores are separated into a plurality of core elements. Second conductor strips are formed on the opposite surface to form coils around the core elements in co-operation with the first conductor strips.

Abstract: A batch fabricated multi-element head is made from interlocking ferrite parts to form a low contoured surface for interfacing with a magnetic medium, such as a flexible disk. On another surface, a multi-turn conductive coil is formed by thin film process and cooperates with a flux path bar to define the magnetic flux field.

Abstract: A magnetic head assembly is disclosed comprising a housing having a front surface including a slot formed therein and extending through the housing; a read/write transducer positioned within the slot and including a read/write gap of predetermined dimensions substantially in the plane of the front surface, the lengthwise extent of the read/write gap being skewed with respect to a first axis running perpendicular to a second, principal axis of the housing; and a pair of erase transducers positioned within the slot on either side of the read/write transducer, each erase transducer including an erase gap of predetermined dimensions substantially in the plane of the front surface, each erase gap being positioned on the opposite side of the first axis from the read/write gap.

Abstract: A method of manufacturing a novel ferrite magnetic head assembly utilizes two ferrite pieces having extending fingers of closely similar dimensions that are joined in interleaving fashion and bonded to a ceramic substrate. The resultant assembly is sliced to provide closure sections for multi-track magnetic heads. Each closure section is joined to a ferrite wafer such that the wafer and closure section define a transducing gap therebetween.

Abstract: A method for making a multitrack head is disclosed wherein, by use of two separate alignment structures, a head having a large number of perfectly aligned cores, with perfect track-to-track spacing, is provided. The described multitrack head, by virtue of the inventive alignment technique, acquires a plurality of lead-protecting channels, the leads which are associated with the head coils being carried through such channels.

Abstract: A magnetic recording and reproducing head arrangement utilizing the azimuth recording method which has an even number 2n of magnetic heads mounted in the head assembly. The carriage holds the head assembly at rest during recording or reproduction and moves the head assembly at right angles to the direction of transportation of the magnetic recording medium to change the tracks to be recorded or to be reproduced. The centers of the head gaps of the magnetic heads fall in a straight line which is at right angles to the direction of transportation of the magnetic medium and the separations therebetween are determined by the conditions that almost all the tracks are tracked by the magnetic heads, practically without leaving any unrecorded tracks within the recording region of the magnetic recording medium, and that magnetic interference between the magnetic heads is negligible.

Abstract: A metallic magnetic head core-holder which supports a plurality of head cores of a multi-track head is provided with at least one slot for improving the crosstalk characteristic of the multi-track head. The slot is located between adjacent head cores, and extends along the entire width of a front wall, which is to abut on a magnetic medium, of the core holder. The slot further extends such that each portion of left and right side walls, which are respectively connected to the front wall, of the core holder is removed.

Abstract: A magnetic record and/or reproduce head, comprised of electrically conductive magnetic core material, has an electrically conductive transducer gap having a magnetic gap length of less than about 15 microinches. The head is selectively actuable by passing a current through the core material via the gap.

Abstract: Elimination of cross talk in an array of integrated magnetic transducing heads by not arranging the electric input and output leads to which the individual transducing elements are connected in one plane but stacking them one on the other with the interposition of an electrically insulating layer.

Abstract: In a magnetic card recording and/or reproducing apparatus, one edge of a magnetic card having a magnetic track parallel to the one edge is guided by a guiding member. The magnetic card is driven by a magnetic card drive member, and signals are recorded on, and reproduced from the magnetic card by a magnetic head. The magnetic head includes two head cores whose gaps are so arranged as to align with each other. Signals are recorded on the magnetic card by the two head cores, and the recorded signals are reproduced from the magnetic card by the one of the two head cores located at an upper position with respect to the guiding member.

Abstract: A multitrack magnetic head is made from an electrically conductive first helix formed on an iron wire that is, in turn, wound to form a second helix. By cutting or lapping a longitudinal flat along one side of the second helix, the first helix is severed into respective discrete coil-wound gapped cores.

Abstract: A multitrack magnetic head is made from an electrically conductive first helix formed on an iron wire that is, in turn, wound to form a second helix. By longitudinally cutting along one side of the second helix, the first helix is severed into respective coils on discrete gapped cores.

Abstract: A multichannel magnetic head with a plurality of U-shaped cores each contacting at both ends a magnetic tape, in which the plurality of cores are arranged in two series, as viewed in the head face, in such a manner that one end of two legs of each core in one series is disposed between the ends of two adjacent legs of a core or cores in the other series.

Abstract: A multiple leg magnetic transducer has two corresponding core portions abutting at a transducing gap plane. Each portion has a transducing gap defining pole and a multiple leg back core contiguous with the pole. A nonmagnetic side piece supports the pole and intermediate leg portions while a rear leg portion most distant from the pole is unsupported by the side piece. The thusly supported portions are pressed together in a direction towards the transducing gap plane while the rear leg portions flex in the opposite direction to obtain an intimate contact between all corresponding end faces of the abutting core portions. In the preferred embodiment the flexed leg portions are firmly supported by a bonding material.

Abstract: Members of magnetic material are attached at a front end surface of a multichannel magnetic transducer to form an asymmetric magnetic circuit. A member is attached to one magnetic pole of each pair of poles forming a transducing channel. The members on consecutive adjacent channels are attached alternatively to poles located on the opposite sides of the transducer front end surface. The members are placed out of contact with the recording medium and at a distance from the transducing gaps to prevent magnetic coupling therewith, respectively.

Abstract: The transducer has a pole tip plate containing magnetic pole tips defining transducing gaps and a core housing providing electric shielding and containing magnetic cores engaging the poles. The tip plate has a first part of a wear-resistant, nonmagnetic, machinable material in the transducer-to-medium interface area, providing long wear, and an integrally joined contiguous second part of a conductive, nonmagnetic, machinable material, providing electric shielding.In accordance with the method, corresponding surfaces of a first block portion made of nonmagnetic, wear-resistant, machinable material and of a second block portion made of a nonmagnetic, conductive, machinable material are integrally joined together. Pole tips are secured into parallel grooves machined transversely to the joined surfaces to form a half-tip plate.

Abstract: A magnetic head assembly for reading and/or writing a track of magnetic information on a moving magnetic medium and for erasing edge portions of the track. The head assembly comprises a central data transfer magnetic core including a pair of core portions providing a data transfer gap on an active face of the head assembly with a read/write coil on one of the core portions. The head assembly comprises also an erase core which includes a pair of erase core portions extending along and in contact with one of the write core portions, another pair of erase core portions respectively in alignment with the first named erase core portions and providing therewith erase gaps on the active face of the head assembly that extend transversely of the direction of movement of the magnetic medium on the active face and a core portion on which an erase coil is disposed bridging and between the last two mentioned erase core portions.

Abstract: An integrated, multitrack, magnetic reading head in which a Hall effect or magneto-resistive material strip is deposited on a silicon substrate. The voltages produced in this strip are sampled by a group of amplifiers for the parallel-charging of a charge-coupled device, which is then read in series to obtain the output signal. Lateral tracks energize circuits making it possible by means of two resistive lines and a system of comparators to open the input gates of the charge-coupled device in order to correct the skew of the reading head.

Abstract: A magnetic erasing head including a rear part on which an exciting coil is wound, side parts extended from the rear part, a front part on which two or more gaps are formed with each spacer made of a non-magnetic substance. An angle of one of the gaps is different from an angle of the other gap.

Abstract: A combined magnetic tape head having a recording head and a reproducing head disposed in a side by side relationship with a recessed wedge shaped area therebetween. A shielding plate is interposed between the heads to reduce cross feed therebetween. The top portion of the shielding plate is bent into L-shape so that the bent tip confronts the recording head. The remainder of the wedge shaped area is covered with a resin material, or an auxiliary plate can be positioned over the plate extending between the heads. In order to maintain the combined head free from dust accumulation, the top portion of the L-shaped shielding plate or the auxiliary plate is tapered so that it has a substantially trapezoidal cross-section with either straight or curved inclining sides.

Abstract: A multi-channel record/playback head is disposed which is used with a magnetic recording medium of vertical magnetization type. The head comprises a plurality of magnetic head elements each including a magnetic record/playback pole disposed opposite to the surface of the medium and a flux conducting pole disposed opposite to a lateral end face of the medium. The elements are arranged so that the individual record/playback poles define different tracks across the width of the medium.

Abstract: High track density multitrack magnetic heads are batch-fabricated from a stack of wafers which are photolithographically processed to provide lands and grooves on the wafers. Thin magnetic films are deposited in the grooves; and coils respectively inductively cooperative with the films are photolithographically formed about the films, the lands serving both to provide track-to-track spacing and to protect the magnetic films from magnetostriction-producing stress.

Abstract: A thin film magnetic head having a contact surface which, when such magnetic head is in use, slidingly contacts a magnetic information carrier, such as a magnetic tape, drum or disc, for the information recording or reproduction. The magnetic head comprises a support substrate on which a thin magnetic layer and a non-magnetic layer are deposited in side-by-side relation to each other. The non-magnetic insulating layer has a wear resistance equal to or higher than that of the thin magnetic layer. A method for the manufacture of the thin film magnetic head is also disclosed.

Abstract: A combined magnetic tape head for use in recording equipment comprises a recording head covered by a shield case, a playback head covered by a shield case and a flat chip for providing a preferable wrap angle of recording tape. The recording and the playback heads are combined into a unitary element by means of a tightening mechanism and/or adhesive agnets. The shield cases are provided at their arcuate front surfaces facing the recording tape with cut portions which are adapted to receive the flat chip, thereby making it possible to readily position the flat chip at a desired position.

Abstract: A method of making a thin film inductive head assembly, which has separate read and write transducers, comprises the steps of depositing the elemental layers of one thin film transducer on a substrate; sputter depositing on the transducer a thick transparent insulating layer; flat lapping the thick insulating layer; depositing the elemental layers of a second thin film transducer on the flat lapped insulating layer; and depositing a thick insulating overcoat on the second thin film transducer. The substrate is then configured as a slider element for flying in transducing relation over a record medium, such as a rotary magnetic disk. The resultant structure includes thin film read and write transducers with a thick transparent insulating layer therebetween, all deposited successively in layers on one surface of the substrate, and having a protective insulating overcoat.

Abstract: A method of producng magnetic head-carrying platforms for supporting one or more integrated transducers arranged on an insulative base and having electrical output strips and an insulating protective member covering the transducer and the output strips provides for joining of the protective member to a substrate with the output strips disposed between the substrate and the member. The surface is treated to expose the ends of the strips which extend beyond the treated surface such that connections to the ends of the output strips may be made by superimposed conductive layers deposited on the treated surface of the substrate. In the fabricated platforms some transducers are in partial alignment in a common plane parallel to the axis of the conductive layers so that at least one output strip of those transducers in partial alignment may be connected by a common output conductive connector.

Abstract: A process for the manufacture of pole structures for magnetic transducing heads is described in which the configuration of the non-magnetic gaps is formed by abrading the ferrite pole structure through a mask to erode recesses in the gap area which have inclined walls. The final dimension of the gap defining face of one or the magnetic elements is determined by removing material from the masked face of the structure until the dimension between the recesses has the desired value.