Abstract: An apparatus for use with a compact disc for writing and reproducing data into an arbitrary sector or rewriting data of an arbitrary sector by allowing the selection of an interleave process similar to that in a music type compact disc or an interleave process of a length corresponding to one recording unit (sector) to thereby make possible sector-completion type encoding and decoding.

Abstract: A disk recording/reproducing apparatus and a disk recording/reproducing method wherein a recording disk (1) having an absolute address is provided with a program region (6) and a read-in region (7), data such as play data are recorded on the program region (6), the data are recorded on the read-in region (7) using, as catalog data, a start address data of a data unit region where the data have been recorded and a finish address data, and the data on the program region (6) are reproduced from the catalog data in the read-in region (7). An erase inhibit flag is set to the catalog data for each of the data units, whereby the erase inhibit and the erase enable are designated by the erase inhibit flag for each of the data units for the data that are recorded on the program region (6).

Abstract: An opposite phase detecting device for alternating current electrical equipments includes a zero cross circuit synchronizing positive half waves of first and second line voltages of a three-phase AC supply supplied to an AC electrical equipment and generating first and second synchronizing pulses each having a pulse width corresponding to an electrical angle of approximately 180 degrees, a counter circuit counting the first synchronizing pulses from the zero cross circuit, a one-shot multivibrator triggered by the second synchronizing pulse to thereby generate a reset pulse having a relatively short time interval, and an AND circuit generating a reset signal based on a logical multiplication of the reset pulse generated by the pulse generating circuit and the first synchronizing pulse generated by the synchronous circuit. The counter circuit is reset when supplied with the reset signal from the AND circuit.

Abstract: A digital video frame recorder which includes an internal video display test pattern signal generator constructed substantially from already existing circuitry and hardware. A microprocessor and read only memor ("ROM") and/or random access memory ("RAM") used for performing preprogrammed self-diagnostic testing upon the digital video frame recorder are additionally programmed so that the user can selectively enable the internal video display test pattern signal generator. The internally generated video display test pattern signal data is stored within the frame memory in memory locations not normally used for storage of externally sourced video data. The internally generated video display test pattern signal data can be generated by sequentially reading out preprogrammed video display test pattern signal data directly from the ROM or RAM, or by having the microprocessor execute preprogrammed instructions stored in the ROM or RAM and thereby compute the video display test pattern signal data directly.

Abstract: A scroll compressor for use in compressing gases includes a stationary scroll member having a top surface, a movable scroll member orbiting about the stationary scroll member for compressing gases together with the stationary scroll member as it orbits about the stationary scroll member, a discharge port formed in the center of the stationary scroll member for discharging the compressed gases, a plurality of release ports which are offset different distances from the center of the stationary scroll member, a release cavity formed in the stationary scroll member and in communication with one of the plurality release ports, a release guide passage passing through the stationary scroll member in parallel with the top surface of the stationary scroll member in communication with the release cavity, a sealed case for housing the stationary scroll member and the movable scroll member and a release pipe connected to the release guide passage through the sealed case.

Abstract: On a tape cassette reel in which upper and lower flanges are integrally molded on upper and lower ends of a reel hub, the upper flange is formed in correspondence with an opening portion through the lower flange, and a protrusion is formed on an outer peripheral portion of the upper flange. This protrusion extends the effective radius of the upper flange so that the complete length of the magnetic tape is guarded against slippage even when the magnetic tape is fully wound around the reel hub.

Abstract: The invention provides an improved semiconductor memory device such as a static RAM. The semiconductor memory device attains high speed read-out of data therefrom without increasing a step of production process. The semiconductor memory device further attains a flash-clearing function without increasing the size of a chip thereof.

Abstract: A disk cassette arrangement which includes a double sided disk is arranged to be used in both dual and single head disk drive units. The cassette case is comprised of upper and lower halves or shells which are formed so that a reinforcing rib is defined when they are coupled together. A guide slot is formed in the rib. The cassette features a shutter which has a U-shaped cross-section and which is slidably disposed on the leading edge of the cassette case. A projection which extends from the inboard edge of the shutter has a barbed like arrangement which can be inserted through a tapered section of the guide slot.

Abstract: A tape cassette having a lid pivotally supported at two side walls of the cassette housing so as to open or close a tape withdrawing mouth has a lid lock member for locking said lid at a closed position. Upon use, the tape cassette is loaded on a recording and/or reproducing apparatus having an optical tape end sensing device formed of a light emitting element and a light receiving element. The lid lock member includes a light leading cover or tunnel piece which coincides with a light path which extends from the light emitting element to the light receiving element. This tape cassette also has an opening formed through its side walls so as to communicate with the light path, wherein an outer end portion of the tunnel piece is inserted into the opening portion.

Abstract: A disk cartridge having a disk cartridge-body in which a disk-shaped record medium is rotatably accommodated and an information signal can be recorded on the disk-shaped record medium, the disk cartridge-body having an opening portion to exchange therethrough the disk-shaped record medium, an openable and closable member for opening and closing the opening portion through which the disk-shaped record medium is exchanged and a write-protecting mechanism formed on the openable and closable member to determine whether or not an information signal can be recorded in the disk-shaped record medium.

Abstract: An electroacoustic transducer apparatus of a type that it is inserted into a cavum concha upon use. The electroacoustic transducer apparatus of the invention is applied to a headphone of a so-called in-the-eart type or so-called inner-ear type. This headphone is provided with an air passage portion formed through an elastic ring member attached to the outer peripheral portion of the housing so as to communicate the inside and outside portions of a concave portion of the cavum concha upon use. Accordingly, a certain amount of sound escapes to the outside, thereby obtaining the acoustic characteristics of substantially the same level from a low band to a high band regardless of the size of the user's ears.

Abstract: The invention provides an improved semiconductor memory device such as a static RAM. The semiconductor memory device attains high speed read-out of data therefrom without increasing a step of production process. The semiconductor memory device further attains a flash-clearing function without increasing the size of a chip thereof.

Abstract: A laser beam deflection apparatus is comprised of a polygon mirror having a plurality of reflection surfaces, a laser beam incident on the reflection surfaces of the polygon mirror, and n number of reflection devices positioned in facing relation to the polygon mirror, and aligned in a rotational direction of the polygon mirror for reflecting the laser beam reflected from one of the reflection surfaces back towards the one of the reflection surfaces of the polygon mirror, whereby the laser beam is twice reflected by the one of the reflection surfaces and is deflected through a predetermined angle n times during each predetermined increment of rotation of the plurality of reflection surfaces of the polygon mirror.

Abstract: A 180 degree ultraminiature phase shifter. Only two switching devices and very few passive circuit elements are required, thus allowing an extremely small and low loss device to be fabricated. When power is applied to switching devices, a low pass pi section low pass filter is realized which provides +90 degrees of phase shift. When power is absent from the switching devices, a T section high pass filter is realized which provides -90 degrees of phase shift.

Abstract: A disc cartridge having a cartridge body in which a magneto-optical disc is rotatably accommodated in a hermetic-fashion so as to be capable of recording and/or reproduction. The cartridge body has a concave recessed portion extended from an insertion side end face of the cartridge body to a central portion of the cartridge body to allow the introduction of an external magnetic field generating means which generates an external magnetic field to record an information signal on the magneto-optical disc accommodated within the cartridge body.

Abstract: An editing system measures the servo-lock period in every pre-view operation. Pre-roll time is updated based on the measured servo-lock period. The magnitude of rewinding of the tape is thus adjusted on the basis of the updated pre-roll time. By up-dating the pre-roll time in accordance with servo-lock period measured in actual operation, the pre-roll time can be set at a minimum value to be determined according to the servo-lock period. Therefore, the tape does not over shoot the optimum queuing position and the period preceding the cut-in point during pre-view operation can be kept short.

Abstract: In a method of disassembling resin-molded equipment, a gap is formed in the boundary portion between a metal body and a resin layer disposed around the metal body in order to separate the metal body is separated from the resin layer. To form the gap, either the metal body or the resin layer may be heated, so that the gap is formed by the difference in thermal expansion between the metal body and the resin layer. Alternatively, a microorganism such as ray fungus of Nocardia is attached to the boundary portion between the metal body and the resin layer, and decomposes the resin to form the gap. Since the gap reduces the bonding strength between the metal body and the resin layer and in some cases the metal body may even separate from the resin layer, the metal body may be pulled out with ease.

Abstract: A band compression device for digital signals in which input digital data are subjected to floating to realize bit reduction and in which a high speed compressing operation is made possible by shifting the input digital data by a number of bits equal to about one half the maximum shift quantity before starting the floating operation for the input digital data.

Abstract: Audio signals are recorded on recording tracks of a disk shaped recording medium in a predetermined schedule for making establishment of an associated track information table easier and allowing after recording of audio signals with respect to each video signal. In addition, selective or entire erasure of video signals and associated audio signals is automatically performed when one of the recording tracks recording one of the video signals or the associated audio signals is ordered to be erased.

Abstract: A boardsailing sail camber inducer has a pair of springs coupling the camber inducer to the leading end of the batten to allow the forward end of the batten to rotate about the mast while simultaneously applying an aftward force along the longitudinal axis of the batten.