Abstract: A record reproduction apparatus having a loading member operative to pull a tape out from a tape cassette for winding around a rotating head drum wherein a clutch mechanism transmits a rotating force of the loading member to a tape reel stand depending on the rotating direction of a loading ring so that a transmission of the rotating force by the clutch mechanism occurs only during unloading of the tape and not during fast forwarding and rewinding of the tape.

Abstract: A recording and/or reproducing device arranged to use a cassette containing a recording medium such as a tape, includes a tape loading mechanism operative to displace the tape contained in the cassette to a position at which the tape is in operative relation to a recording head. A cassette displacing arrangement into which the cassette is first loaded is movable to a position where the cassette is in operative relation to the tape loading mechanism. A member on the displacing arrangement serves to hold the cassette at a certain position relative to the displacing arrangement so that the cassette will be moved into operative relation with the tape loading mechanism by the displacing arrangement.

Abstract: A mechanism for controlling the return movement of cassettes in slide-in type tape decks by utilizing a movable frame to return the cassettes and momentarily interrupt the return movement of the movable frame at a point in its travel where at least one of the drive members penetrating the cassettes in the operative position is still engaged in the cassettes.

Abstract: For recording on, and reading of, a magnetic tape guided around a cylinder, there are several magnet heads arranged on a common circle diameter. The magnet heads revolve about a common axis extending obliquely with respect to the travel direction of the tape. The magnet heads interact with the tape through a slot-shaped aperture formed in the cylinder.For the purpose of achieving a very simple tape-guiding system, the tape is guided in a direction perpendicular to the cylinder longitudinal axis over a cylinder surface which, at least in its tape-guiding zone, and viewed in a section perpendicular to the cylinder longitudinal axis, corresponds at least approximately to a projection of the circular motion performed by the magnet heads in a direction perpendicular to the tape travel direction.

Abstract: A cassette loading/unloading apparatus for a slot-in type cassette tape recorder is provided with a toggle spring and an ejecting spring. The toggle spring is so disposed that a drawing-in stroke is larger than a pushing-in stroke at cassette insertion. The ejecting spring is disposed independently of the sliding stroke of a slider which slides together with a cassette inside a cassette holder at the cassette insertion. A biasing force is charged in the ejecting spring in concert with the ejecting stroke of an ejecting plate at cassette ejection, thereby applying an ejecting force to the slider.

Abstract: Magneto-optic media and system optimization including a set of optimized magneto-optic media for use in a magneto-optic recording and readout system employing an incident readout light beam of a given fixed power, P.sub.o. The beam is delivered in a linearly polarized state to the magneto-optic media and the magneto-optic radiation received from the media is detectable by the system. Each member of the set of media comprises a reflective layer having a predetermined thickness, a first transparent layer overlying the reflecting layer and having a predetermined thickness and refractive index and a second light transmissive layer having a predetermined thickness and exhibiting absorptivity at the wavelength of said incident readout light beam and having magneto-optic conversivity and perpendicular anisotropy. Members of the set of optimized magneto-optic media may further included a third transparent layer overlaying the second transmissive layer and having a predetermined thickness and refractive index.

Abstract: A cassette loading/unloading apparatus for a slot-in type cassette tape recorder is provided with a toggle spring and an ejecting spring. The toggle spring biases a slider which slides together with a cassette inside a cassette holder at cassette insertion. The ejecting spring is stretched between the cassette holder and an operating plate slidably attached to the cassette holder, functioning as a return spring for the operating plate. The ejecting spring is charged with a biasing force in concert with and only by the slide of the slider at the cassette insertion, and is disengaged from the slider to be locked to a charged state when the slider passes the neutral point of the toggle spring. The charged biasing force of the ejecting spring is caused to act as an ejecting force on the slider at cassette ejection.

Abstract: In an apparatus for recording and/or reproducing signals on a flexible disc which is freely rotatable between opposed walls of a substantially flat cartridge, a holding device is movable in respect to a base member from a cartridge receiving position to a loaded position at which a cartridge in such holding device is operatively disposed for engagement of the disc by a drive extending from the base member through first openings in the cartridge walls centered in respect to the disc for rotating the latter while a head mounted on the base member extends through second openings in the cartridge walls to record or reproduce signals on a surface of the disc. A guide plate mounted on the base member has an aperture through which the head extends and a first disc guiding surface surrounding such aperture, and a positioning plate is mounted on the holding device and has a second disc guiding surface which, in the loaded position, is in parallel, spaced confronting relation to the first disc guiding surface.

Abstract: A method for positioning and maintaining a disc head over a desired track centerline on a disc rotatably carried on a disc drive. The distance between the current position of the disc head and the desired track centerline is monitored, and a signal generally proportional to that distance is applied to the disc head moving mechanism to cause the disc head to move toward the track centerline. The control signal is clipped if it exceeds predetermined maximum and minimum values.

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 tape recorder or player with automatic azimuth control, utilizing a single pieozoelectric element inside the head's magnetic shield. A bimorph has one end rigidly connected to the head and the other end rigidly connected to the head support, for pivoting the head about an axis in line with the head gap.

Abstract: In a magnetic-tape cassette apparatus with an electrical power supply (43, 62), a power switch (5, 40, 61) for switching the power supply on and off, a capstan (24) for tape transport, and a speed switching element (20, 54, 67) which can be switched between a first and a second position, for switching the capstan drive to a first and a second speed respectively, switching means (12, 14; 42, 45; 64) are arranged between the power switch and the switching element. The switching means are such that at least during normal operation, each time that the power switch is switched off and is subsequently switched on, the switching element is set to the first position in response to the actuation of the power switch.

Abstract: A magnetoresistant transducer for reading data present on the tracks of a multitrack magnetic carrier, comprises at least one magnetoresistant element perpendicular to the direction of travel of the data, and first and second magnetic screening means situated at either side of the element.The magnetoresistant transducer comprises deflecting means for deflecting the magnetic field generated by the current flowing through the element. The deflecting means are situated between the latter and the first and second screening means to intercept and deflect the magnetic field lines transmitted by the data items on the track. The deflecting means includes a plurality of mutually parallel thin magnetic blades separated from each other by thin non-magnetic laminations the thickness of which is such that the magnetic coupling between two adjacent laminations is weak. The laminations and magnetoresistances are of anisotropic material and have their axes of easy and difficult magnetization parallel to each other.

Abstract: A flexible magnetic disk cassette having a disk enclosed in a cover formed of an upper half and a lower half, the lower half having a driving hole through which a center positioning pin of a driving means may extend into a center aperture of a center core disk rigidly and non removably secured at the center of the disk, the center core disk being further provided with driving and positioning means for receiving a driving pin of the driving means, said driving and positioning means structured so that engagement with the driving pin will cause the disk to move to bring the center aperture of the attached center core disk into proper centering engagement with the positioning pin.

Abstract: A flexible magnetic disk cassette includes a flexible magnetic disk. A center core disk is also provided having a center hollow and raised fringe, and is attached at a center of the flexible magnetic disk with the raised fringe. A cover having an upper half and lower half for containing the flexible magnetic disk with the center core disk is provided. The lower half of the cover has a driving hole a little larger than an outer diameter of the center hollow of the center core disk.

Abstract: The present invention is directed to improvements in a perpendicular magnetic recording-reproducing head. One of the improvements comprises the use of a magneto-resistive effect element to form the main pole of the magnetic head. This feature of the invention enables a stable and faithful reproduction of information recorded in a magnetic recording medium up to the shortest wavelength and to obtain a sufficiently large reproducing output signal. Another improvement comprises the use of such magneto-resistive effect elements in layers. The multilayer structure permits production of a large reproducing output and also an optimum S/N ratio even if the width of track is small.

Abstract: A process for making magnetic reluctance effect type magnetic heads comprises forming the magnetic sensor, first lead and second lead sections in series by use of the same material. The noise in the magnetic head is reduced, yet the output is increased by making the first lead section of a width larger than that of the magnetic sensor and second lead sections. The reproducing sensitivity of the magnetic head is increased by forming a plurality of magnetic sensor sections in series within a rectangular area. The control of the magnetic characteristics of the head are controlled for providing less dispersion by providing a substrate on which a magnetic reluctance effect type material varying in electric resistance in response to any magnetic field is formed into a film, the substrate being optionally etched by the use of photolithography to form the magnetic sensor sections, the first lead section and the second lead section on the substrate in given configurations.

Abstract: A tape recorder in which an inter-music detecting function and either a fast-forward or rewind operation can be simultaneously activated with one finger. Cuts are formed in adjacent sides of a fast-forward operation button and a rewind operation button with the inter-music detector operation button arranged within the cuts. The inter-music detector function is latched upon simultaneous actuation of the inter-music detector actuating button and one of the fast-forward operation button and rewind operation button. The locking may be performed either mechanically or electronically.

Abstract: A high-speed tape transport system in a magnetic reproducing apparatus. The reproducing apparatus includes a reel for taking up a magnetic tape on which an information signal and a control signal have been recorded. The system comprises a control head for reproducing the control signal from the magnetic tape, a frequency-voltage converter for producing a voltage corresponding to the frequency or period of the control signal thus reproduced. Moreover, the system includes a reel motor for rotating the reel and a circuit for controlling the reel motor's rotational speed in response to the voltage produced by the frequency-voltage converter. Consequently, the rotational speed of the reel motor is controlled so that the magnetic tape is travelled at a constant high speed.

Abstract: A ceramic-ferrite head for use with a flexible data-storage disk comprises a cylindrical body composed of magnetically soft ferrite and formed internally with a cup-shaped recess open at one end and a boss provided with a window at the opposite end. The core assembly is received in this boss and is bonded therein with a glass-resin composition while the coils of the assembly are found in the recess and are connected, together with the ground lead through a cap of the same material as the body, to a printed circuit board on the opposite side of this cap. The recess is lined with a conductive coating which is likewise grounded to the printed circuit board by the ground conductor.