Abstract: A read only memory device includes a first electrode and a second electrode arranged in an overlapping relation with the first electrode so as to be geometrically in connection at an intersection therewith corresponding to a storage location for one type of data. At least one of the first and second electrodes is formed of a ceramics system high temperature superconductor. A prescribed one of the two electrodes which is formed of the high temperature superconductor has a high resistance region for insulating the first and second electrodes from each other at an intersection corresponding to a storage location for another type of stored data. The high resistance region is formed by irradiating an intersection with a focused ion beam.

Abstract: A technique for defining the gap depth of a magnetic head utilizes side-by-side knife edges which point in generally opposite directions, and define thereby a reference gap depth. The resistance of a conductive layer beneath the structure which defines one knife edge is the analog of the gap depth.

Abstract: Herein disclosed is a semiconductor integrated circuit device comprising a SRAM which is composed of a memory cell having its high resistance load element and power source voltage line connected with the information storage node of a flip-flop circuit through a conductive layer. At the same fabrication step as that of forming the plate electrode layer of a capacity element over the conductive layer formed on the portion of the information storage node through a dielectric film, an electric field shielding film for shielding the field effect of a data line is formed over the high resistance load element through an inter-layer insulation film.

Abstract: A reel position device for shifting reel supports, on which reels are mounted, corresponding to diameters of the reels of plural different sizes and/or distances between the reels and for positioning and holding the reel supports at a predetermined position, and a magnetic recording apparatus usign such reel support shifting device, wherein one end of each of operation members for shifting the reel supports is rotatably engaged by a corresponding pivot shaft arranged at a predetermined radial position of each of rotary members driven by a motor. The other end of said operation member is engaged by a guide in a reel support shifting structure and by a guide slot formed in a fixed part of the device. A positioning and holding mechanism such as a V-shaped notch is provided in each guide slot. Positioning and holding forces are obtained from elastic members such as springs connected to the rotary members.

Abstract: A cleaning device for removing debris from the tape of a reel to reel magnetic data tape cartridge includes a cleaning material mounted adjacent the tape path to constantly contact and remove debris from the tape. Preferably, the cleaning material both wipes debris from the tape and retains the debris. The cleaning material may be mounted to rotate in response to the movement of the tape past the cleaning material. An alternate emebodiment which permits both sides of the magnetic tape to be cleaned includes mounting the cleaning material on a arm which is pivotably mounted to the cartridge. The arm pivots to maintain contact with the tape and is shaped to provide a plurality of contact portions between the cleaning material and the tape.

Abstract: A semiconductor memory device carrying out a self-refresh operation in response to a refresh request signal. The device includes a memory cell array formed on a chip; a plurality of pseudo memory cells distributed and arranged on the chip, each having the same constitution as the memory cells in the memory cell array; a first circuit for monitoring the capacitor voltage in the pseudo memory cells; and a second circuit for generating the refresh request signal and charging each capacitor in the pseudo memory cells. When the potential of at least one of the capacitors in the pseudo cells falls below a predetermined level, the refresh request signal is generated, thereby enabling the device to lengthen a refresh interval as desired and to decrease power dissipation, while facilitating work requiring any adjustment.

Abstract: In a recording apparatus having a digital signal input which can record such digital signal on a recording medium, when a condition of the input signal changes during the recording operation the recording apparatus is automatically set into a recording pause mode and such operating mode is indicated to the operator. When the condition of the input signal is stabilized within a predetermined period of time during such recording pause mode, the recording medium is automatically rewound and the recording apparatus is then released from the recording pause mode and recording commences at a location on the record medium so as to record over any previously recorded unstable signal.

Abstract: A computer disk drive dust protector is made in the form of an elongated wedge-shaped slot entry member which is inwardly tapered at the edges, so that insertion of the member into the disk drive slot causes the member to tightly wedge within the slot from end to end and from top to bottom, thereby preventing the entry of dust into the slot. A handle is attached to the rear edge of the slot entry member to facilitate the insertion of the member into the computer disk drive slot and to facilitate removal of the member from the slot when the computer is to be used. At least the portion of the device which enters into the disk drive slot is made of resilient plastic to resiliently hold the member in place in the disk drive slot.

Abstract: A cassette loading apparatus in which there is provided a clutch member having a resilient member coupling first and second sliding members. The resilient member is adapted to horizontally move along guide members provided on one of a pair of side plates for guiding a cassette holder. The second sliding member has formed therein an elongated hole along which a projection formed on the first sliding member is displaced. The length of the elongated hole is greater than the displacement of the projection corresponding to the moving distance of the cassette holder along a horizontal section of an L-shaped guide groove formed in the one side plate.

Abstract: The present invention resides in a rotation detecting mechanism for a tape recorder including a movable shut-off lever for setting at least a reproducing lever or a head base at a stop state position, with the reproducing lever or the head base being previously set to the reproducing state position, a movable changeover lever for interchangeably setting the normal reproducing direction or the reverse reproducing direction of a magnetic tape, a switching device for selectively shifting and setting the shut-off lever or the changeover lever, a movable trigger lever for selectively triggering the switching device a detecting lever rotationally biased in a direction which is in accordance with the rotation and the rotational direction of a reel block, and a cam gear rotated perpetually in one direction including in turn a first cam surface guiding one end of the detecting lever when the detecting lever is rotationally biased in one direction, a second cam surface guiding one end of the detecting lever when the de

Abstract: According to a magnetic tape high-speed braking apparatus, a cam groove for setting various operation modes is formed in a cam gear. A high-speed mode such as a high-speed search is set on the cam gear at that portion thereof which corresponds to an end portion of a loading state. When a loading motor rotates in a predetermined loading direction, a worm gear is rotated in a first direction via pulleys, a belt and gears. In high-speed search mode, a cam pin of a cam lever engaged with the cam gear is fixed to a recess of a rotatable lock lever. When a tape end is detected and the cam gear rotates in a direction opposite to the first direction, the cam pin is separated from the recess by a projection of worm gear member, a lock release lever and a spring.

Abstract: A magnetic tape cartridge including a tape cartridge having a tape outlet at least partially defined by a partition wall and a side wall, a tape reel rotatably disposed in the tape cartridge and having a magnetic tape wound therearound and a leader block for securing an end of the tape and being detachably disposed in the tape outlet. The leader block has at one end thereof a curved surface for contacting a portion of the partition wall and at another end thereof an abutting member for abutting against the side wall of the cartridge. The side wall of the cartridge is deformable to allow for attachment and detachment of the leader block.

Abstract: A disk cartridge includes upper and lower half casings to be assembled to form a hard casing, a magnetic disk held in the casing in a rotatable manner and lining members attached to the inner surfaces of the upper and lower half casings, wherein the lining member has a laminated structure which includes an attracting layer as a base layer for attracting dust and a smooth layer having a large number of apertures which is laminated on at least one surface of the base layer.

Abstract: A magnetic-tape apparatus is disclosed which includes a drive mechanism for driving a magnetic tape and tape reels, a magnetic-head mechanism buffer mechanism comprising a belt (8), guide elements for guiding the belt in an operational position, a tape-threading mechanism which during the thread-out phase threads the tape out of the cassette and wraps it around the magnetic-head mechanism and during the thread-in phase threads the tape into the cassette. A belt-threading mechanism threads the belt between the guide elements into the tape path during said thread-out phase and brings the belt back into its initial position during the thread-in phase. The apparatus (1) also includes a mechanism for moving the belt-threading mechanism in such a way that the belt can be brought into the desired operational position and into said initial position.

Abstract: An optical associative memory produces an electrical correlation matrix pattern from an inputted electrical reference pattern and an electrical recall pattern, and converts the electrical correlation matrix pattern into a corresponding optical correlation matrix pattern, which is stored in a correlation matrix storage device. A reference pattern conversion device converts the electrical reference pattern into an optical reference pattern and a multiple image formation system converts the optical reference pattern to the other optical reference pattern. A pattern operation device produces an optical recall pattern by multiplying the optical correlation matrix pattern and the optical reference pattern. An inverse multiple image information system and a light receiving matrix convert the optical recall pattern into a corresponding electrical recall pattern, and the obtained electrical recall pattern is subjected to a thresholding operation.

Abstract: A magnetic head assembly within a transducer is caused to float over the recording surface of a medium during operation while being in contact with the surface in the non-operational state. The transducer is supported by a load beam via a flexible member which deforms under the influence of frictional force between the transducer and the surface during landings and take-off. The load beam has integral stop plates which abut against a part of the transducer to regulate the deformation of the flexible member so that it stays within a predetermined range in the event of any relatively high frictional force being applied to the transducer.

Abstract: In a dynamic Random Access Memory having memory cells arranged in a matrix shape, one of row decoders is designated so that the data stored in the memory cells of a row corresponding to the designated row decoder are read out. Subsequently, a row address for refreshing the memory cell array is automatically generated by a refresh address counter which is located in the dynamic Random Access Memory, thereby, the memory cells on the row of the memory cell array are refreshed without any external refresh control unit.

Abstract: A head carriage mechanism of a magnetic recording/reproducing apparatus including a single guide rod fixed on a frame of the apparatus, a head carriage having a first side in which the guide rod is passed through, a rack of teeth provided on the head carriage at a second side opposing the first side side, a mounting member fixed on the frame, a stepping motor provided with a pinion gear and mounted on the mounting member such that the pinion gear is meshed with the rack teeth, a leaf spring configured to have a U-shaped cross section and mounted on the mounting member such that the leaf spring makes a slide engagement with a part of the head carriage so that the rack teeth and the pinion gear are pressed to each other, and a wear resistant slide member provided at the part of the head carriage in which the leaf spring makes the slide engagement with the head carriage.

Abstract: SRAM device having a power supply voltage control circuit capable of preventing the failure of memory cells used for a long period of time, without lowering a power supply voltage is disclosed. The SRAM device includes a plurality of word lines, a plurality of pairs of bit lines, a plurality of memory cells each coupled between a word line and each pair of bit lines, and a power supply regulating stage coupled to each memory cell, for decreasing a supply voltage delivered to each memory cell when an external power supply voltage exceeds a specified voltage level, and delivering the external power supply voltage to each memory cell when the external power supply voltage does not exceed the specified voltage level. If an external power supply voltage is lower than a voltage level Vc, the supply voltage is supplied as a power source of the memory cell.

Abstract: A FIFO memory device facilitates transfer of data between a host CPU and a peripheral device in one of a number of modes. In one mode, the FIFO memory device functions as two FIFO memories, one for passing data from the host CPU to the peripheral device, and one for passing data to the host CPU from the peripheral device. In another mode, the FIFO memory device functions as a single FIFO which facilitates passing data from the host CPU to the peripheral device or from to peripheral device to the host CPU. The FIFO includes two RAMs addressed by a set of address counters. Of importance, the host CPU can bypass the address counters to directly address each RAM, thereby reading data from or writing data into either RAM regardless of the state of the address counters.