Abstract: Magnetic tape cassette apparatus (1) having a drive mechanism which is used for playing magnetic tape cassettes and has a cassette loading mechanism which by means of a lift lever (3) moves a cassette tray (1a) with a cassette (2) accommodated by the latter between an eject position and a playing position, a cassette catch (9) being guided in a guideway of the lift lever (3) so as to be displaceable in the draw-in direction of the cassette tray (1a) between an eject and a draw-in position and the cassette tray (1a) being raised into the eject position when the cassette catch (9) is in the eject position, and the cassette catch (9) having spring arms (26) which, in the eject position, press resiliently against parts of the cassette tray (1a) and of the lift lever (3).

Abstract: A film magnetic head in which a soft metal magnetic film having uniaxial magnetic anisotropy is employed as a magnetic pole material, and a magnetic circuit having a magnetic path direction substantially perpendicular to the easy axis direction thereof is provided. The magnetic head records and reproduces signals having frequencies of 1 MHz and higher. According to a first embodiment of the invention the length W of a magnetic pole film in the easy axis direction forming a magnetic path is defined as follows:0.2.ltoreq.d/W.ltoreq.0.3, or d/W.ltoreq.0.15,where d is the 180.degree. magnetic domain wall distance in the magnetic pole film. Alternatively, the length W of a magnetic pole film in the easy axis direction forming a magnetic path and the uniaxial anisotropic constant Ku is defined as follows:50 .mu.m.ltoreq.W.ltoreq.200 .mu.m and 100 J/m.sup.3 .ltoreq.Ku.ltoreq.400 J/m.sup.3, or700 .mu.m.ltoreq.W, and Ku.ltoreq.300 J/m.sup.3.

Abstract: The present invention performs improvement in travelling characteristics of magnetic tapes and scanning chracteristics of magnetic heads by forming a tape running face which is made to run along a part of a course of a magnetic tape bent by a magnetic head to support the magnetic tape ranging over the full width, an opening which is located in the tape running face and made to run along an area of movement the magnetic head, and guide members for guiding the both edges of the magnetic tape to the both sides of the tape running face.

Abstract: Write precompensation data is recorded on a disk of a magnetic disk drive indicating the write compensation to be provided for each of a plurality of head/media combination which may have relatively wide variations in performance characteristics. Apparatus is provided for transferring and storing this write precompensation data in the disk controller at start-up and for accessing this stored data during each write operation to provide a "tailored" write precompensation for the particular head/media combination to be employed for the writing operation.

Abstract: An optical disk drive apparatus includes a tray into which an optical disk or a cartridge housing therein an optical disk may be inserted. The tray is movable first in a horizontal direction and then in a vertical direction. A cone arm having a cone disk rotatably supported at its distal end is provided and the proximal end is fixedly supported near the entrance of the apparatus where an insertion slot for inserting an optical disk or cartridge is located. The cone arm is flexible and elongated in shape and has its intermediate portion operatively coupled to a bracket fixedly mounted on the tray, so that as the tray moves horizontally and then vertically, the cone arm is automatically deflected to bring the cone disk in engagement with the optical disk, thereby causing the optical disk properly mounted on a spindle motor. Further, an oil damper is interconnected with both a loading/ejecting arm and a shutter opening and closing member.

Abstract: A magnetic head support device is characterized in that a first magnetic head is supported such that it inclined with respect to a surface of a flop disk, and a second magnetic head is supported such that it moves parallel to the other surface of the floppy disk. The second magnetic head is mounted on a carriage of the device via a support element. A movable portion of the support element on which the second magnetic head is mounted is coupled by two parallel gimbal plates to a stationary portion of the support element connected to the carriage.

Abstract: A tape cassette for a recording and reproducing apparatus, for example, a video tape recorder, has: a cassette housing which passes a tape housed therein along an opening in the front surface thereof; a front cover pivotally attached to the cassette housing such as to cover the front side of the passed tape; a rear cover pivotally attached to the front cover such as to cover the rear side of the passed tape; a pin to be guided and provided on the rear cover; and a guide groove provided on the cassette housing such as to guide the pin. When the front cover is pivoted in the cover-opening direction, the pin is guided along the guide groove, whereby the rear cover, together with the front cover, is pivoted in the cover-opening direction while the lower end portion of the rear cover is being pivoted with respect to the front cover so as to separate to the rear of the front cover.

Abstract: An air bearing slider according to the present invention provides a programmable slider wherein the fly height of the read/write head may be conveniently controlled using electrical signals. In an air bearing slider according to the present invention, the rear of the slider is made to fly lower by altering the angle of attack of a rear air bearing region. In one embodiment of the present invention, a slider configuration includes a first air bearing region at the leading edge of the slider and a second air bearing region at the slider's trailing edge. The first air bearing region includes a tapered region. A deformable central region, including a non air bearing surface, joins the first and second air bearing regions and controls the relative angle between the air bearing surfaces. The relative angle is adjusted by deforming the central region using a layer of piezoelectric material which overlays the central region.

Abstract: Apparatus for cleaning the recording/playing head, capstan and pinch roller of cassette-type audio recording/playing machine comprises a cassette-type housing; a first cleaner rotatably and slidably mounted in the housing; a drive for simultaneously rotating and sliding the first cleaner to clean the peripheral surface of the recording/playing head and at least a second cleaner pivotably mounted in the housing for simultaneously contacting and cleaning the capstan and pinch roller of the audio recording/playing machine.

Abstract: A tape cassette push-out device for a tape recorder includes a push-out mechanism for pushing the rear face of a tape cassette (A) thereby moving the cassette to a cassette insertion opening (2) of the recorder. Before the push-out mechanism is operated, a cassette box (7) for holding the cassette is first moved from a tape driving position to a position adjacent to the backside of the cassette insertion opening. After operation of the push-out mechanism, the mechanism is retractable away from the cassette.

Abstract: A cassette tape player provided with a rotary head drum including a magnetic head to reproduce or record data from/to a tape including a tape loading mechanism for loading the tape onto the drum, a tape pulling slider operated by the tape loading mechanism for holding the tape against the drum during reproducing or recording operation a link mechanism for moving the tape pulling slider into reproducing or recording position and providing a first force to hold the tape pulling slider there during the reproducing or recording operation and a spring operative to apply a second force to the tape pulling slider to retain the slider in the reproducing or recording position during the reproducing or recording operation.

Abstract: The hard disk drive permits a decrease in the number of component parts and a reduction in the power consumption by having the lock mechanism provided with a lock member having an engaging part for locking the carriage at the position prescribed for locking the carriage by being brought into engagement with a counter-engaging part disposed on the carriage, a first spring for urging the lock member in the direction in which the engaging part is brought into engagement with the counter-engaging part disposed on the carriage, a second spring partially made of a shape memory alloy the shape of which changes from a first shape to a second shape on exposure to heat generated by flow of electric current therein, the second spring for urging the lock member in the direction in which the lock member releases engagement with the counter-engage member disposed on the carriage according to a change of the shape memory alloy's shape from the first shape to the second shape when electric current flows in the shape memory a

Abstract: A disc cartridge capable of preventing entering of dust into a casing and ensuring a stable and positive operation without damaging a disc while satisfactorily exhibiting a cleaning effect and keeping proper contact between a recording head and the disc. A casing is provided thereon with a slide area which is formed by a slide area defining section of the casing. The slide area is formed with at least one head inserting hole. The slide area defining section is provided on an inner surface thereof with at least one thick-walled portion in a manner to extend along a whole periphery of a portion of the head inserting hole overlapping a sheet-like liner and inwardly project from the inner surface of the casing, so that the liner may be pressed against the disc at a force of a constant level over a wide area of the disc and block a communication between an exterior of the cartridge and its interior through the head inserting hole.

Abstract: A head transfer apparatus includes a magnetic substance disposed on a movable unit assembly driven by a magnetic circuit in a tracking direction. The magnetic substance is operative, under the force of a leakage flux of the magnetic circuit, to produce a magnetic force to urge a bearing of the movable unit assembly against a guide, thereby controlling a clearance between the bearing and the guide or lowering a bearing pressure imposed on the bearing by the weight of the movable unit assembly.

Abstract: Improvements in the perpendicular magnetic recording and reproducing head of the type in which a main magnetic pole and an auxiliary magnetic pole are arranged as a unitary structure on one side of a magnetic recording medium. Problems are solved in relation to pseudo pulses in the output signals and change in the level, contributing to improving the sensitivity for recording and reproduction. The magnetic head is used for perpendicular VTR's. The perpendicular magnetic recording and reproducing head of the invention comprises a support block which consists of a main magnetic pole, a non-magnetic block which holds said main magnetic pole to form a surface opposed to the magnetic recording medium, and an auxiliary magnetic pole block which supports part of said main magnetic pole and which supports said non-magnetic block; and a magnetic block provided on the side surface of said support block in the direction of track width.

Abstract: A magnetic disk apparatus has a disk assembly including a single servo disk and a plurality of data disks, a servo-head supporting structure for supporting a servo head and data-head supporting structures for supporting data heads. These heads are so disposed as to cooperate with respective disks. The servo-head and data-head supporting structures are driven by an actuator to move the servo head and the data heads to the required positions on the corresponding disks. The servo-head supporting structure and each of the data-head supporting structures have different proper oscillations to prevent the occurrence of a resonance during a seek operation.

Abstract: An improved thin film magnetoresistive (MR) sensor uses an alloy comprising Fe.sub.(1-x) Mn.sub.x, where x is within the range of 0.3 to 0.4, as an antiferromagnetic layer to provide longitudinal exchange bias in the ferromagnetic MR layer. In a specific embodiment the exchange bias is at a high level and is independent of thickness of the antiferromagnetic layer over a wide range.

Abstract: In a flexible magnetic disc comprised of a circular flexible magnetic sheet, an elongated metal spring plate having a main portion and support portions at respective ends of the main portion, and a hub structure secured to the flexible magnetic sheet at the center thereof and having an opening extending axially therethrough; the hub structure has a pair of positioning surfaces at locations spaced apart from each other about a central axis of the opening, and a pair of seats for receiving the support portions of the elongated metal spring plate so as to mount the elongated metal spring plate on the hub structure with the main portion of the elongated metal spring plate positioned in opposing relationship to the pair of positioning surfaces, and a portion of the spring plate contiguous with, and extending along a lower edge of the main portion of the metal spring plate is bent away from the central axis of the opening.

Abstract: A magnetic recording and/or reproducing apparatus is disclosed, comprising a rotary head device, in which a magnetic tape is drawn out of a cassette and brought into contact with the rotary head device or the like. A tape draw-out device doubling as a tape guide forms a predetermined tape path and guides the drive of the magnetic tape after drawing out the magnetic tape. The apparatus further requires a fixed magnetic head and other tape guide mechanism which are movably arranged on the path of the tape draw-out device during the apparatus operation for reducing the size thereof. With the tape loading operation, the fixed magnetic head and the other tape guide are moved by a common drive mechanism and held in position by a common stopper.

Abstract: In the magnetic disc apparatus of the present invention, an air filter for filtration has a filter element bent in a zigzag form with a pitch equal to an interval at which plural magnetic discs are separately housed in a closed casing. The bend lines of the filter element are set on planes where the centers in the thickness direction of the magnetic discs are positioned. The air flow is caused by rotation of the magnetic discs so as to enter the air filter, and is not liable to have stagnation thereof in front of the filter element. Static pressure of the air flow in front of the filter element is substantially uniform.