Abstract: A magnetic head device includes a magnetic head, a mount on which the magnetic head is provided, and first and second pairs of tape guides. The first tape guides are provided on the mount at positions approximately adjacent to and on opposite sides of the magnetic head. The second tape guides are provided on the mount at positions separated from the magnetic head such that one of the first tape guides is positioned between each of the second tape guides and the magnetic head. The mount is formed of a high-accuracy material, and the first and second tape guides are formed of materials having low friction properties which include portions molded into holes provided in the high-accuracy material to form an integral unit. The inner wall of one of the projections of each of the first tape guide is formed as a perpendicular surface and the inner wall of the other projection of each of the first tape guides is formed as an inclined surface.

Abstract: A magnetic head is manufactured by the steps of accommodating a core chip blank into an elongated hole provided in a slider blank, joining the core chip blank and the slider blank together with glass and then grinding the surface to form a surface which makes sliding-contact with a recording medium. Glass for joining the core chip blank and the slider blank together is obtained by melting a glass rod mounted in a predetermined position on the slider blank. In order to prevent the core chip from being positionally moved by surface tension of the molten glass when the glass rod is melted, the edges of the elongated hole are partially provided with protrusions for positioning the glass rod so as to prevent surface tension of the molten glass from positionally moving the core chip.

Abstract: A magnetic head for floppy discs has a shielding member surrounding a core and coil of the head so as to prevent the head from being adversely affected by an external magnetic field. The shielding member is a stack of sheets and each sheet is made of magnetic metal such as permalloy and is fixed on a gimbal plate together with the magnetic head. Insulator layers made of thermoplastic resin may be provided between sheets of the stack of sheets to adhere the metal sheets to one another and to electrically insulate the metal sheets from one another.

Abstract: A one inch high tape drive which can play a tape that is 0.315 inches (8 millimeters) wide. The tape drive includes a head that is defined by a first edge, a second edge and a centerline that is equal distance from each edge. The head is typically 0.64 inches high and includes a transducer which has a centerline that is offset from the centerline of the head by approximately 0.010 inches. The head is coupled to a stepper motor assembly which can move the head from the first edge of the tape to a location 0.010 inches from the second edge of the tape. The 0.010 offset allows a 0.315 inch (8 mm) wide tape to be played in a 1 inch high tape drive that has total tolerances of .+-.0.050 inches.

Abstract: A magnetic head for writing and/or reading out data into and/or from a magnetic tape has surfaces defining a reference plane for determining a position of an edge of a traveling magnetic tape and defining an inclined plane for urging the magnetic tape to the reference plane, and a tape travel surface defined between the reference and inclined planes. A recess is formed at a portion of the tape travel surface extending along at least one edge of the magnetic tape.

Abstract: A magnetic head connecting structure includes a back of a magnetic head held by a tape guide covered with a backshield made of a metal strip and a flexible board soldered to lead terminals of the magnetic head which project from openings of the backshield. In such a magnetic head, a pair of temporarily retaining pawls projecting toward the tape guide are integrally molded on both sides of the backshield, and the temporarily retaining pawls are inserted and temporarily retained in corresponding fixing holes formed in a back of the tape guide.

Abstract: A supporting device to support a magnetic head in close proximity to a photographic film passage so that the track section of the magnetic head is brought in contact with a magnetic layer on the film, includes a supporting member, a fixing member on which the magnetic head is fixed, two supporting resilient arms one ends of which are fixed to the fixing member and the other ends are fixed to the supporting member. The two supporting arms are fixed in such manner that the two supporting arms are inclined relative to a surface of the fixing member and imaginary lines which are colinear with and extend from the two first supporting arms cross each other at an imaginary line which is colinear with and extends from a magnetic gap of the track section of the magnetic head.

Abstract: An optical head includes an objective lens for converging a light beam emitted from a light source onto a rotating recording medium, a carriage for holding the objective lens, a fine adjusting device for finely moving the carriage along an optical axis of the objective lens and/or a tracking direction and a movable head portion. The movable head portion is provided with a first opening facing the objective lens and a second opening connected to the first opening. The second opening is located off the optical path and has a dust filter mounted therein. Such a construction of the optical head prevents dust or the like from entering into the inside of the optical head due to the negative pressure generated upon rotation of the recording medium.

Abstract: A magnetic sensor unit includes an elongated nonmagnetic sensor case, magnets, magnetic sensors, and positioning portions. The sensor case has a plurality of sensor housing recesses formed in a row in its upper surface in its longitudinal direction, and magnet housing recesses formed in a row in its lower surface at positions respectively corresponding to the sensor housing recesses. At least the upper surface of the sensor case is covered with a nonmagnetic cover. The magnets are respectively housed in the magnet housing recesses of the sensor case. The magnetic sensors are respectively housed in the sensor housing recesses of the sensor case and have magnetoelectric transducers magnetically biased by the magnets. The positioning portions are respectively formed in the sensor housing recesses of the sensor case and respectively position the magnetic sensors in a longitudinal direction thereof and a direction perpendicular thereto.

Abstract: A housing apparatus is operable to align a record/playback head with respect to different parallel tracks on a moving magnetic tape in such a manner as not to disturb the positioning of the tape as it passes longitudinally along its transport path. The housing apparatus includes a housing body having a convex, rounded front face lying in contacting relation with respect to the moving magnetic tape at two closely spaced-apart areas. A record/playback head is transversely movable with respect to the housing body and extends through a provided opening in the body to lie in contact with the moving tape between the two tape contacting areas of the housing body front face. Means is provided to move the record/playback head transversely with respect to the tape while the moving tape is in contact with these two areas on either side of the head.

Abstract: A magnetic sheet control member, for use in a device for recording and reproduction using a magnetic head in sliding contact with a rotary flexible magnetic sheet, to guide the magnetic sheet to the magnetic head by a negative pressure, having upstream-side and downstream-side inclined surfaces disposed respectively at the upstream side and the downstream side with respect to the rotational direction of the magnetic sheet and inclined to become more distant from the free rotary surface plane of the magnetic sheet towards the downstream side, and stabilizing surfaces disposed respectively at the outer side and inner side with respect to the radial direction of the magnetic sheet to connect the upstream-side inclined surface and the downstream-side inclined surface, thereby obtaining a stable head contact over the entire recording area from the innermost side to the outermost side of the magnetic sheet.

Abstract: A rotating drum for use in a magnetic recording system. A magnetic head is mounted on the rotating drum, and a magnetic recording medium is wound on the rotating drum, and the rotating drum is rotated so as to read and write signals. Alternatively, the magnetic recording medium is mounted on the rotating drum, and signals are read and written by a magnetic head fixed exteriorly of the rotating drum. The rotating drum has at least one opening or notch in a magnetic recording medium-winding surface thereof. In order to restrain the deformation of the rotating drum during the rotation thereof, the center of gravity of the drum is disposed substantially in registry with the axis of rotation of the drum.

Abstract: An adjustable head mounting system for a magnetic recording device. The head mounting system includes a head tray for receiving a magnetic head and a bracket. The head tray is formed of a resilient material and has a first portion for receiving the head, a second portion intersecting the first portion along a first joining line, and a third portion intersecting the second portion along a second joining line. The three portions of the head tray each have a substantially planar surface and an adjustable coupling device to connect the surface to the bracket. The orientation and position of the head can be adjusted by adjusting the coupling device to pivot the head about the joining lines.

Abstract: A magnetic disk control member having a flat opposing surface opposing a rotating magnetic disk that defines a free rotary surface plane and provided protrudingly with a magnetic head, a protrusion for generating a negative pressure disposed at the upstream side with respect to the rotational direction of the magnetic disk, and an inclined surface disposed at an end of the opposing surface at the downstream side with respect to the rotational direction of the magnetic disk and inclined so as to gradually become closer to the free rotary surface plane towards the downstream side with respect to the rotational direction of the magnetic disk.

Abstract: A magnetic head affixed to the underside of a carrier body mounted at the periphery of a head-wheel for scanning oblique tracks on a magnetic tape is provided with shielding of ferrite, mu-metal or amorphous iron, to reduce magnetic crosstalk. The shielding surrounds the part of the magnetic head that projects beyond the head carrier body except for a small portion near the polished surface that needs to be left uncovered to avoid interfering aerodynamically with the contact of the magnetic head with a magnetic tape. One piece of the shielding is of rectilinear shallow U-shaped profile, forming a pocket for the magnetic head below the carrier body and extends beyond the tip of the carrier body, where the second piece of shielding material completes an annular shielding ring around the end of the magnetic head. This shielding is particularly useful for an after-check playback head used during recording to check on the quality of the recorded signals.

Abstract: Structures of magnetic heads having superconducting shields are disclosed for spatially directing magnetic recording/playback fields. One embodiment is a thin film magnetic head with a layer of superconductor material associated with its throat. Further embodiments provide intertrack shielding and concentration of recording/playback fields into relatively small pole tip regions.

Abstract: A method of simultaneous manufacture of a plurality of planar magnetic heads on a wafer or a slab made of non-magnetic material designed to be cut out to separate each head. The method can be applied to magnetic heads of the type including a micro-gap formed between two magnetic poles, facing a gap defined between two wire-wound ferrite cores. The method consists in depositing said thin layer magnetic poles on a first face of a wafer made of non-magnetic material and in hollowing out, in the face opposite to said wafer, at least one cavity for housing said wire-wound cores so as to obtain a calibrated spacing or a junction between the upper part of each of said wire-wound cores and said thin layer magnetic poles.

Abstract: A magnetic sheet control member, for use in a device for recording and reproduction using a magnetic head in sliding contact with a rotary flexible magnetic sheet, to guide the magnetic sheet to the magnetic head by a negative pressure, having upstream-side and downstream-side inclined surfaces disposed respectively at the upstream side and the downstream side with respect to the rotation direction of the magnetic sheet and inclined to become more distant from the free rotary surface plane of the magnetic sheet towards the downstream side, and stabilizing surfaces disposed respectively at the outer side and inner side with respect to the radial direction of the magnetic sheet to connect the upstream-side inclined surface and the downstream-side inclined surface, thereby obtaining a stable head contact over the entire recording area from the innermost side to the outermost side of the magnetic sheet.

Abstract: Grooves are formed on the armor portion of a magnetic head. Elastic pieces having nails for linking to the grooves of the head, and a concave portion for positioning the head are integrally molded with a mounting arm for mounting the head. Linkage of the head to the mounting arm is achieved by the linkage of the elastic pieces to the grooves.

Abstract: A magnetic recording and reproducing head unit which includes a tape guide unit including a set of spaced two tape guide substrates, a spacer provided between the tape guide substrates so as to dispose the two tape guide substrates through a predetermined distance in an approximately parallel relationship to each other, and guide poles for guiding the surface of a magnetic tape, arranged to extend through front portions of the tape guide substrates in a direction generally perpendicular to surfaces of the tape guide substrates, and a plurality of magnetic heads fixed, in a state where their postures are adjusted, to the tape guide unit.

Abstract: A vertical recording magnetic head is disposed for movement close to or into sliding contact with a vertical recorded magnetic medium for purpose of magnetic recording and playback. To prevent the influences of external magnetic field upon a recording or reproduced magnetic field, a main magnetic pole of the head is surrounded by a block of a magnetizable material which exhibits a high permeability, which serves as a magnetic shield.

Abstract: A method of making a magnetic recording and/or reproducing head having a head support and a head core. The head core is inserted in a slit defined in the head support and is retained in position on the head support by means of a fixing jig to hold the head core immovable relative to the head support. Thereafter, a glass frit for temporarily fixing the head core relative to the head support is fused by the application of a laser beam to partially connect the head core and the head support together. After the fixing jig has been removed and a glass frit has been mounted on the head support so as to cover the slit above the head core, the assembly is loaded into a heating furnace to fuse the glass frit thereby to permanently interlock the head core and the head support together.

Abstract: A thin-film magnetic head has a first ferrite block on which a plurality of transducing elements are aligned on a predetermined surface, and a second ferrite block bonded to the first ferrite block, and has multi-track capabilities in accordance with the transducing elements. Eithr bonding surface of the first and second ferrite block is formed with an insulating film layer, the entire bonding surface is coated with an adhesive or formed with a plurality of recesses to be externally filled with the adhesive, and the adhesive is filled in gaps defined by the recesses and the surface of the opposed ferrite block. Thus, since the bonding portions of the first and second ferrite blocks are distributed over a wide region, the bonding strength can be largely increased, the transducing gap lengths are uniformly maintained, and the transducing element characteristic is not affected by the aging of the adhesive thereby improving the reliability of the magnetic head.

Abstract: A permanent magnet type demagnetizing head is made by successively molding a resin-magnet which forms a body having a magnetic member forming a part of a tape contact surface and a resin which forms protection member forming a remainder part of the tape contact surface, and therefore a manufacturing process is simplified, and further quality of the demagnetizing head is improved, since size precision is enhanced.

Abstract: A magnetic-tape-cassette apparatus (1) includes a head-mounting plate (10) and a magnetic head (3) arranged on the head-nounting plate (10) and having a cylindrical tape-contact face (12) and an air gap (25). The magnetic head (13) forms part of a head unit comprising a head support (16) which, viewed in the direction of tape transport, includes a tape guide (18) before and after the magnetic head (13), which tape guide has cylindrically curved guide surfaces (21) which at one side are bounded by alignment surfaces (23) at one of their axial ends. Each of the guide surfaces (21) is adjoined by a control edge (24) which is inclined relative to the guide surface (21) to urge the magnetic tape against the relevant alignment surface (23) during tape transport, the axial length of the guide surfaces (21) being smaller than or equal to the tape width (b).

Abstract: A magnetic head assembly has a plurality of magnetic heads of magnetic ferrite bonded in a single piece faceplate of magnetic ferrite. The magnetic heads are substantially surrounded by the magnetic ferrite faceplate. The bulk shielding properties of the magnetic ferrite faceplate effectively shield each magnetic head from crosstalk produced by other heads. Preferably, the faceplate and magnetic heads are formed from the same magnetic ferrite. The magnetic head assembly of the invention has application for use in magnetic tape recorders and magnetic disc drives.

Abstract: In a magnetic head slider having a air-bearing surface facing a magnetic medium, and a taper surface inclined with respect to the air-bearing surface, the above-mentioned taper surface is shaped as a convex surface with the curvature facing the magnetic medium.

Abstract: A magnetic-tape-cassette apparatus having a magnetic head fixed in a head mount and carried on a head mounting plate. The head mount includes a cylindrical tape guide disposed to each side of the magnetic head air gap, in the direction of tape travel, a height limiter at one axial end of each guide surface, and an obliquely disposed control surface at the other end of each guide surface for biasing magnetic tape against the height limiters, so that the magnetic tape always has a constant orientation with respect to the air gap.

Abstract: A thin film magnetic head having a substrate, a magnetic head and a superstrate formed of materials which are highly resistive to being abraded by a magnetic media being moved thereacross is shown. The magnetic head includes a bottom pole piece having a front gap section and a rearwardly extending portion positioned at predetermined locations on the substrate. The bottom pole piece forms a bottom support for a coil having a plurality of coil windings. An insulating structure having a thin gap defining section and a thick coil windings enclosing portion is located on the bottom pole piece such that the thin gap defining portion establishes the thickness of a magnetic transducing gap and the thick coil windings enclosing portion encloses and surrounds that portion of the coil windings supported by the bottom pole piece.

Abstract: A process for producing a floating-type magnetic head comprising a head core and a slider by forming a glass layer over a core chip to cover the portion thereof to be opposed to a magnetic recording medium, and thereafter fitting the core chip into a core groove in a slider chip. The core chip is fittable into the groove without the likelihood of causing damage to the medium opposed portion since this portion is covered with the glass layer. The glass layer is melted to bond the core chip to the slider chip, and the assembly is machined to form a medium opposed face to complete the magnetic head.

Abstract: This invention proposes to form a pair of protruding or projecting stripe portions along the tape-gliding face of magnetic tape and to reduce the pad pressure to magnetic tape thereby reducing the gliding resistance of magnetic tape without increasing its spacing loss (first embodiment), to incline the plane of the projecting stripe portions in a decreasing direction in the vicinity of the tape-gliding face in order to stabilize the pad contact (second embodiment), to form grooves on the tape-gliding face of the magnetic core in the transversal edge portions at least in the tape entrance side thereby facilitating prevention of tape squeaking (third embodiment), to increase the height of one of the projecting stripe portions in the vicinity of head mounting position compared to that of the other stripe portion thereby preventing one-sided abrasion of the tape-gliding face (fourth embodiment), and to form tape guide members on the magnetic head for guiding the magnetic tape closer to one of the projecting strip

Abstract: A magnetic head for reading or writing information magnetically encoded on a substrate is disclosed. Included in the head are a magnetic core and a boron carbide contact surface which the substrate rubs against during reading or writing. The boron carbide contact surface is electrically conductive and is resistent to wear. Grounding of the conductive boron carbide contact surface avoids static electric charge build up on the contact surface caused by rubbing of the substrate against the magnetic head.

Abstract: A composite magnetic and optical head comprises a magnetic sensor including a magnetic core which is adapted to detect a magnetic pattern recorded on a record medium; an optical sensor including a nonmagnetic light transmitting member located along a distal gap of the magnetic sensor and an optical fiber bundle having one end connected to the light transmitting member, and adapted to detect an optical pattern recorded on the record medium; and a holder containing the magnetic and optical sensors in the internal space thereof, the holder having two opposite side walls extending at right angles to the distal gap of the magnetic core and one end face from which the distal gap projects outward.

Abstract: A magnetic head supporting device for supporting at least one magnetic head in contact with a flexible magnetic disk so as to record and reproduce signals in and from the flexible magnetic disk. The magnetic head supporting device comprises a gimbal spring having a central portion to which the magnetic head is secured at one side thereof; and a pivot which contacts on the opposite side of the central portion of the gimbal spring so as to support the center of the magnetic head through the intermediary of the gimbal spring.

Abstract: A method including the following steps: (1) providing a single piece magnetic ferrite faceplate which has a face region and which has at least two aligned slots which open on the face region and extend into the faceplate; (2) providing a multihead magnetic ferrite "breadslice" core structure which includes an elongated base portion connecting at least two in-line magnetic heads which extend from the base portion; (3) bonding the magnetic ferrite breadslice core structure to the faceplate so that the magnetic heads extend into the slots; and (4) removing the base portion from the breadslice core structure so that individual magnetic heads remain bonded in their respective slots in the faceplate.

Abstract: A method for connecting a magnetic head core (1) with a mounting plate (2) in which the magnetic head core consists of ferrite and is separated from a preformed core block (4). Prior to separation the core block is soldered to a metal block (5) and the magnetic head core is then separated jointly with the mounting plate, from the overall block.

Abstract: For use with a stretched surface recording disk, a recording head having a spherical surface and a series of parallel grooves adjacent the disk and a support arm assembly which maintains the recording head in proper attitudinal relationship to the disk.

Abstract: A back core fixing structure of magnetic head is provided, in which a back core is fixed to magnetic cores in such a manner that a holding member provided with a resilient tongue segment having pinching power is attached to the open end on the opposite side of a pair of magnetic cores to the confronting side facing opposite a magnetic medium with the resilient tongue segment opened on the side of the open end, and the back core is fitted in the space between the magnetic cores and the resilient tongue segment, whereby position adjustment of the back core is achieved easily and fixing work is simplified and can be automated.

Abstract: In a magnetic head carriage assembly which includes a head carriage for mounting a magnetic head for slidably contacting with a rotating magnetic disc and a clamper for mounting a clamp shoe disposed to oppose the magnetic head and biased toward the head carriage, there is provided a pivot for confining the movement of the clamp shoe in a direction perpendicular to the direction of rotational plane of the magnetic disc and a cantilever spring for mounting the magnetic head on the carriage or clamper.

Abstract: A thin film magnetic head comprising a thin film magnetic head structure and a protective plate thereon such as glass or the like has an improved bonding interlayer between them. The interlayer is formed by fusing together registered solder areas which have been preformed respectively on the mirror image positions of the upper surface of the head structure and the lower surface of the protective plate.

Abstract: A magnetic head device comprises a magnetic head assembly and a holder which is inserted with the magnetic head assembly and has a generally ring shape which is electromagnetically open so as to minimize magnetic induction.

Abstract: A magnetic head comprises a first magnetic core having a first gap on an exposed surface side; a second magnetic core having a second gap on an exposed surface side forming an identical surface with an exposed surface of the first magnetic core, and disposed in the vicinity of the first magnetic core; and a magnetic film disposed in the vicinity of the second magnetic core and for magnetically short-circuiting a magnetic circuit of the second magnetic core without passing through a coil wound around the second magnetic core. The magnetic film prevents crosstalk to the first magnetic core from the second magnetic core.

Abstract: A magnetic head device according to the present invention comprises a head core formed of a magnetic material. The head core includes a sliding portion having a magnetic gap defined therein and adapted to be in sliding contact with a magnetic record medium, and a pair of leg portions formed integrally with the sliding portion. A coil is wound around one of the leg portions of the head core. The head core is held between a pair of holder shells, which each have one end coupled to the sliding portion of the head core and the other end extending toward the other ends of the two leg portions of the head core to be coupled thereto. At least one of the holder shells is formed integrally with a connecting portion which, formed of a magnetic material, constitutes part of the other end of the holder shell, so that the connecting portion and the head core define a closed magnetic path passing through the magnetic gap.

Abstract: A magnetic head comprises a magnetic pole placed at a position to effect a magnetic function to a magnetic recording medium to be driven; a medium supporter which is placed opposing the magnetic pole with respect to the magnetic recording medium with a certain gap between the medium supporter and the magnetic recording medium, and which has a cavity at the portion opposing said magnetic pole and a flat portion having a spread surface area formed around the cavity opposing the magnetic pole; and a fluid supplied to the cavity so that the magnetic recording medium is brought to contact with the magnetic pole by a force of the pressurized fluid from the cavity and is supported by a negative pressure produced at the flat portion.

Abstract: One of the preferred embodiments of the present invention provides an entirely novel thin-film magnetic-head assembly for a digital-signal recording/reproducing system using multiple tracks. The assembly comprises electronic-circuit components including a combined capacitor/resistor a constant-current source, an amplifier, and an analogue-signal multiplexer, all located inside a casing that surrounds the thin-film magnetic-head. These electronic circuits are present on the upper and lower surfaces of the casing and are connected by means of an elastomer so that these circuits are integrally connected to the thin-film magnetic head.The thin-film magnetic head of the casing may alternatively be bent and extended so that electronic-circuit components can be mounted to it.

Abstract: A method for decreasing the time taken for an adhesive to set is disclosed. In a small gap (e.g. 0.005 inches or less) an adhesive such as LOCTITE 420 sets in approximately two seconds. If the gap is larger than this, the set time can be as long as fifteen minutes or more. The present invention is directed to the use of a piece of corrugated material in the gap so as to provide small gaps (i.e. 0.005 inches or less) in which the adhesive can set in a short time period (of a few seconds duration). A specific application to a magnetic read/write head is disclosed.

Abstract: The present invention is to construct a combination magnetic head apparatus in which thin film type magnetic head element portions, circuits and circuit parts accompanying therewith are mounted on first and second magnetic shield plates to thereby construct a recording head and a reproducing head and both the magnetic shield plates are bonded together at the back surfaces thereof with the result that the apparatus can be made small in size, the assembling thereof can be simplified and the accuracy thereof can be improved.

Abstract: A magnetic head for recording and reproducing information on and from a flexible magnetic recording tape. The active face of tape supporting protrusions formed in the magnetic head is so configured that the contacting area between the supporting protrusion and the recording tape is smaller at both end portions of the protrusion than an intermediate portion thereof as viewed in the direction widthwise of the recording tape, whereby improved contacting state and floating state between the magnetic head and the recording tape can be assured over the whole width of the flexible recording tape.

Abstract: A nonmagnetic holder is made having a plurality of precisely located parallel grooves. Each groove has a reference lateral surface provided therein. Individual magnetic transducers are inserted in each groove with a lateral surface abutting the reference lateral surface within that groove. The transducers are preferably made by well known batch fabrication techiques. A locating element, such as a leaf spring, is provided in each groove to urge the transducer core against the reference surface and to firmly hold the transducer in a desired position during alignment and assembly. The modular structure allows inspecting the individual transducers for mechanical or electrical damages and their replacement, if necessary, prior to the final assembly. The multichannel head is then integrally joined together, for example by bonding. The rejection rate of the resulting modular multichannel head is significantly reduced.

Abstract: A method of manufacturing a multitrack magnetic head, including positioning and securing sets of core parts on major portions of base plates, arranging the base plates such that sets of core parts face each other, placing a screening plate between and transverse to the major portions, pressing the major portions against the screening plate, and then securing the major portions directly to the screening plate while maintaining the major portions under pressure.