Abstract: A disk pack spacer ring has formed thereon a plurality of pairs of intercommunicating scoop/pump channels which prevent formation of solid body rotation of air between closely spaced disk surfaces so that the entire space between the disk surfaces is ventilated. A scoop channel angled into the direction of rotation scoops air into the channel, and a intercommunicating pump channel angled away from the direction of rotation pumps the scooped air out in a direction opposite to disk rotation. In one embodiment, the scoop and pump channels are disposed on upper and lower surfaces of the ring and a flow through channel disposed on the inner surface of the ring connects the two.

Abstract: The communications monitor and logger preferably uses reel-to-reel tape recorders to continuously record communications over multiple channels such as multiple telephone lines. Each tape recorder uses a pair of capstans and pinch rollers to move the tape during recording and play-back. The pinch rollers are engaged with the capstans by means of a solenoid through a linkage and spring coupling. The spring is stretched by the solenoid only after the pinch roller makes contact with the capstan, thus reducing the force required from the solenoid. The spring is pre-loaded so as to improve the accuracy with which the force applied to the pinch roller is determined. The solenoid is used to apply force to the spring only when the solenoid plunger approaches its seat, so as to make the most efficient use of the solenoid and minimize its size and electrical power usage.

Abstract: A recording and/or reproducing apparatus arranged to use a rotary type record bearing medium, including a rotating member for rotating the medium about an axis, a recording and/or reproducing head, a head carriage carrying the head and movable to shift the head relative to the medium, a carriage guide for movably supporting the carriage and for guiding the movement of the carriage, a chassis for supporting the guide, and a plurality of adjusting members provided between the guide and the chassis for adjusting the guide in at least two directions different from each other relative to the rotation axis of the medium.

Abstract: A read/write head for use in a disk drive and including a head body having a vertically extending core slot that extends longitudinally from a front surface of the head body in near proximity to one side thereof. A side winding slot extends horizontally from the same side to the front surface of the head body at a predetermined angle. A ferrite core member is disposed within the core slot to support a core winding in the side winding slot.

Abstract: A magnetic head having a recording capacity for sufficiently deriving performance of a high coercive magnetic tape and capable of recording and reproducing signals of very high frequencies at high efficiency. The magnetic head of the present invention includes ferromagnetic thin films and insulative thin films alternately laminated one upon another to form a multi-layered film magnetic core which constitutes part or all of a magnetic path, with the ferromagnetic thin films being so arranged that the directions of their anisotropy are different from each other, and thus, Snoek's limit, due to ferromagnetic resonance, is broken through, thus, making it possible to record and reproduce signals in an efficient manner up to high frequency band regions.

Abstract: A flexure for a rotary actuated load arm for use in a data storage system is disclosed. The flexure attaches a slider to the load arm. The slider carries a transducer over a track on a disk. The disclosed flexure has a high enough radial stiffness to prevent the slider from sliding and sticking in a position where the transducer cannot read or write data on the desired track.

Abstract: In a recording disc assembly comprising a recording disc, a hub made of plastic resin material, having a pair of reference surfaces formed on the inner surface of a rotational shaft insertion hole for positioning the disc assembly in a recording device by engagement of a rotational shaft of the recording device and a supporting plate made of metal integrally formed with the hub, the supporting plate is provided with at least a stepped portion near the reference surfaces so as to assure good accuracy of the flat plane of the reference surfaces when the hub is molded.

Abstract: Apparatus for cleaning microfloppy disc drive heads comprises two hinged leaves (38a, 38b) forming an openable shell (38) and a replaceable disc of cleaning material (70) sandwiched between the leaves. Each leaf has an aperture (16) through which a disc drive head (not shown) may contact a cleaning disc when the shell containing the cleaning disc is inserted into the disc drive, and one aperture is covered by a removable label (62) for use in a single-sided drive which is removed for double-sided use. The label is on the interior surface of the leaf. The hinge is formed by another larger label member (90) on the exterior of the shell.

Abstract: A magnetic head having a first core half body constituted by a first non-magnetic base and a magnetic layer made of a high-permeability magnetic material and formed on the first non-magnetic base, and a second core half body constituted by a second non-magnetic base and a magnetic layer made of a high-permeability magnetic material and formed on the second non-magnetic base. This magnetic head is provided with a track width regulation groove communicating with at least one of recording medium sliding surfaces of the first and second non-magnetic bases, the track width regulation groove being filled with the magnetic layer; and abutting surfaces formed on the sides of the track width regulation groove opposite to each other in the widthwise direction of the track, the abutting surfaces being parallel to the surface of mating one of the first and second core half bodies when the abutting surfaces abut there-against.

Abstract: A cassette loading apparatus has a clutch mechanism provided with a first sliding member which is capable of moving horizontally along a guide member provided on one side of a side plate; a second sliding member having an elongated hole with which a projection provided on the first sliding member is engaged, and mounted such as to slide with respect to the first sliding member by being connected to the first sliding member by a resilient member; and an auxiliary sliding member resiliently engaged with the second resilient member having tension which is greater than that of the first resilient member.

Abstract: In a head carriage guiding mechanism for guiding a carriage carrying a magnetic head along a guide shaft thereby positioning the magnetic head in the radial direction of a magnetic sheet contained in a magnetic sheet pack, the guide shaft extends slidably through a chassis and is secured at one end thereof to the carriage so as to facilitate replacement of the carriage and improve the head positioning accuracy.

Abstract: A linear actuator comprises a pair of central poles symmetrically arranged parallel to the direction of motion of a carriage for transducers. Four permanent magnets are disposed around each central pole leaving predetermined gaps. Four ambient poles and one terminal pole surround the permanent magnets and each central pole. Two driving coils are slidably movable in the predetermined gaps therebetween. Upper and lower flat plate members support the driving coils so they may be fixed to the carriage. The central poles each have a rectangular cross-section, the permanent magnets surrounding the exterior four walls of the central poles leaving the predetermined gaps in which the driving coils are disposed. The ambient poles and terminal poles surround the central poles and form closed magnetic circuits. The flat plate members of the carriage are composed of ceramic material. The driving coils, arranged inside the predetermined gaps, are mounted at the ends of the flat plate members.

Abstract: A flexible disk jacket for accommodating therein a disk-like magnetic recording medium to form a flexible disk is formed by folding and bonding a plastic sheet into a bag-like shape. The plastic sheet is of a composite sheet material formed by laminating an outer layer and an inner layer respectively consisting of at least one plastic layer. The outer layer is colored and has heat sealability and antistatic properties. The inner layer has heat sealability.

Abstract: A cassette tape recorder wherein lateral widthwise movement of a tape can be limited to assure stabilized feeding of the tape and prevent eventual damage to the tape. The tape recorder comprises a pair of cassette guide posts securely mounted on a stationary main base plate, and a tape guide mounted on a movable head carrying plate and having an upper widthwise movement limiting projection and a lower shorter widthwise movement limiting projection formed respectively adjacent upper and lower ends of a tape contacting face thereof for limiting lateral widthwise movement of a tape being fed along the tape contacting face of the tape guide. At least one of the cassette guide posts which opposes to the tape guide has a tapering profile presenting a lower large diameter portion and an upper small diameter portion which are opposed respectively to the lower and upper widthwise controlling projections of the tape guide.

Abstract: A rotatable magnetic head assembly for use in a magnetic tape recording/play-back device of the helical scanning type, the assembly comprising two diametrically oppositely located magnetic transducing heads (12, 12'). In order to enable recording of a number of tracks simultaneously without the use of a protective band, the heads (12, 12') are constructed and aligned relative to other so that they each form two oblique tracks (38A, 38B) on a magnetic tape (6) and a given intermediate space. At least one track (39A) is formed in the intermediate space by the other head.

Abstract: As an alternate to two separate video tape recorders are operated to perform dubbing or the like, the present invention provides a double video cassette tape recorder for dubbing, wherein one of two video tapes is inserted at an upper position and another tape at a lower position in the same or separate cassette by front loading, and the two tapes can be separately or simultaneously driven to record and play back using a common capstan and cylinder heads for each tape in the limited space of housing. The double video cassette tape recorder for dubbing according to the present invention does not take up space for installation, and the inside mechanism can be used commonly to conventional VCR to save cost.

Abstract: An actuator mechanism for positioning magnetic heads includes arms that support a magnetic recording/reproducing head at one end thereof. Each of the arms is mounted about a shaft and supported for rotation. A coil support member is attached to the end of the arms opposite the head, and is made of a molded resin that integrally covers a voice coil motor used for causing the swinging movement of the arms. The molded resin of the coil support member is a synthetic resin mixed with a powered metal having a known specific gravity and thermal expansion coefficient. Thus, the weight of the synthetic resin can be adjusted to balance a portion including the magnetic heads and the arms with the coil support member in relation to the shaft.

Abstract: The magnetic data storage system includes a magnetic transducer head-suspension assembly with an inline suspension slider with a reduced height leading portion that provides for gimballed connection to the suspension load beam and a full height rear portion that enables the use of the increased height portion for the transducer coil windings. The suspension includes a single piece combined gram form and load beam with the entire head-suspension assembly being contained within the height of the slider full height portion to enable minimization of the head-suspension overall height required in magnetic disk drives with closely spaced disks and back to back transducer heads or minimum height head-suspension assemblies that extend between disk surfaces.

Abstract: The invention pertains to a method for the manufacture of a magnetic head, and a magnetic head in which this method is applied, a method which, after the head is manufactured, provides for a stage for making a mechanically shielding layer of a material such that the bonding coefficient is high, i.e. such that the chemical valencies with respect to the material forming the head is close to one.The invention can be applied in particular, to the manufacture of magnetic heads in thin layers for reading/writing on magnetic tapes.

Abstract: A magnetic core structure for a transducer head of the type used in digital data storage devices is wider on one side of the magnetic gap (e.g., the write side) than it on the other side of the gap (e.g., the read side), to provide "wide write-arrow read" recording and reproducing capabilities. Magnetic flux return during recording (writing) operations is accomplished through the comparatively narrow read core plus additional magnetic closure elements which are disposed alongside, and which magnetically shunt, the read core, such that the overall core structure has basically the same width on each side of the magnetic gap. Improved transducing performance is provided by using additional thickness for such magnetic shunts and recessing the end extremity of the latter adjacent the gap at the face of the head, where the head accesses the magnetic recording media, such that the overall magnetic reluctance of the magnetic returns (i.e., shunts) is lowered but the effective gap width of the head is not changed.