Abstract: An apparatus for and a method of calculating a sum of products by which calculation of a sum of products can be performed with a high degree of accuracy. The apparatus includes a data memory for storing data therein, a coefficient memory for storing coefficients therein, and a cumulative adder including a multiplier, a cumulative adder and an accumulator for calculating the products of the data stored in the data memory and the coefficients stored in the coefficient memory in order of magnitude of the exponent parts of the coefficients stored in the coefficient memory and for cumulatively adding the products.

Abstract: An image signal interpolating circuit including a plurality of integrated circuits 31, each integrated circuit 31 including therein memories 40 to 43 for holding respective pixel data of 2.times.2 dots, operational or computational elements 44 to 47 for calculating interpolated values on the basis of respective pixel data of 2.times.2 dots, and an input/output control section 36. The plurality of integrated circuits are arrayed to calculate interpolated value between respective pixels of a pixel block of 2n.times.2m dots.

Abstract: A magneto-optical disc recording/reproducing apparatus in which a magneto-optical disc, a disc rotating and driving unit, an optical head device, an external magnetic field generating unit and a controlling device are contained as one in an outer casing.

Abstract: A disc recording apparatus includes a base member, a cartridge holder, a magnetic head and a supporting arm. The base member has a spindle motor to rotationally drive a magneto-optical disc accommodated in a disc cartridge and an optical pickup unit for radiating at least one of light beam on the magneto-optical disc. The cartridge holder holds the disc cartridge. The cartridge holder rotatable is mounted on the base member and moved between a loading position in which the magneto-optical disc is loaded on a disc table mounted on the spindle motor and an unloading position in which the magneto-optical disc is taken out the disc table. The magnetic head generates vertical magnetic field and applies the vertical magnetic field to the magneto-optical disc. The supporting arm supports the magnetic head and is rotatable mounted on the cartridge holder to move corresponding to the movement of the cartridge holder.

Abstract: A track traverse detecting circuit for generating a count-out signal with precision in addressing high-speed traverse operations appropriately. The circuit includes a tracking zero cross (TZC) signal generating circuit, two delay circuits, an edge detecting circuit and a mirror signal generating circuit. The TZC signal generating circuit generates a TZC signal at the zero cross timing of a tracking error signal. The TZC signal is then delayed by one of the two delay circuits by an appropriate time in accordance with the traverse speed for access to a desired track. Edges of the delayed TZC signal are detected by the edge detecting circuit. A mirror signal output by the mirror signal generating circuit is sampled at the timing of the detected TZC signal edges. The output of the sampling is provided accurately as the count-out signal.

Abstract: Disclosed is a shape data processing method illustratively for use with a CAD,CAM (computed aided design/ computer aided manufacturing) system. The method involves measuring the volume of a target product based on the shape data of that product. In operation, a virtual projection surface is established for the target object to be measured. The surface of the object is divided into small regions. A column portion is formed as an extension from each small region to the projection surface. The volume of the column portion is measured for each small region. The measured volumes are accumulated in accordance with the orientation of the normal vector to each small region. This method allows the volume of the target object to be measured easily and with precision even if the shape thereof is complex.

Abstract: An apparatus for recognizing handwritten trace and inputting document information is disclosed which comprises trace means for inputting handwritten characters, coordinate information detection means for detecting locus information provided by said trace means as coordinate information, a display superposed on said detection means for allowing an image displayed thereon to be recognized through said detection means, M character display frames to which said handwritten characters are successively input and in which results of recognition of the locus information are displayed substantially in a cyclic manner, a logical character frame disposed in the vicinity of said character display frame for temporarily displaying N (N>M) characters cyclically input from said character display frames, a writing page portion to which characters displayed in said logical character frame are finally transferred to be displayed thereon, and an operating portion provided within said logical character frame to be operated when

Abstract: An apparatus for reproducing address data recorded on a disk record medium with an information signal which is recorded on the same by forming pit portions in response to the information signal included a pickup for optically reproducing the recorded data and signals is provided. Also the apparatus includes a circuit for generating a sampling pulse from the recorded data and signals so that the sampling pulse occurs substantially beginning position of a mirror portion beginning the pit portions, a circuit for sampling and holding the recorded data and signals by the sampling pulse, and a circuit for decoding an output signal of the sampling and holding means so as to generate the address data.

Abstract: A double-side optical disc formed by a pair of optical disc halves bonded together, and a process for producing the double-side optical disc. An adhesive is applied to the disc halves, which are then bonded together at an angle relative to each other in which the direction of the adhesive flow on one disc half will intersect the direction of the adhesive flow on the other disc half. In this manner, satisfactory flatness of the optical disc may be achieved without being affected by surface irregularities of the adhesive layer.

Abstract: A data input apparatus comprising a pen for selectively indicating and inputting desired data; a display unit for displaying an image of the input data; a tablet for obtaining coordinate data by indicating with the pen the position corresponding to a predetermined portion of a pattern displayed on the display unit; means for detecting the coordinate data in response to a downward press of the pen to the tablet, and further detecting the coordinate data in response to an upward lift of the pen from the tablet; means for setting a first region of a predetermined area in the tablet, and also setting a second region which includes the first region and has an area greater than that of the first region; and deciding means for accepting the input data in response to a downward press of the pen to the first region and thereafter settling the input data in response to an upward lift of the pen from the second region.

Abstract: A servo circuit for controlling an actuator provided on an optical pickup of a disc reproducing apparatus, the optical pickup optically reading out an information signal recorded on a disc is comprised of a phase compensating unit including a first phase compensator circuit whose gain characteristic and phase characteristic are set to first characteristics and a second phase compensator circuit whose gain characteristic and phase characteristic are set to second characteristics, the first and second phase compensator circuits being selectively coupled, a detecting circuit for detecting an oscillation of the actuator, and a switching circuit for switching the first and second phase compensator circuits from one to the other on the basis of an output from the detecting circuit.

Abstract: A laser beam generating apparatus which is easy to manufacture and simple in adjusting operation. The laser beam generating apparatus comprises a light source having a narrow active layer for generating pumping laser beam, a laser medium for receiving the pumping laser beam to form a heat lens therein and generate a fundamental wave laser beam, a non-linear optical crystal element having a face inclined with respect to an optical axis of the fundamental wave laser beam for receiving the fundamental wave laser beam to generate secondary harmonic laser beam, a quarter wavelength plate for suppressing coupling between two polarization modes of the fundamental wave laser beam, and a pair of planar reflecting means for reflecting the fundamental wave laser beam back into the laser medium. The laser medium, non-linear optical crystal element, quarter length plate and planar reflecting means cooperate to constitute a light resonator.

Abstract: A method and apparatus for removing dust from an information carrier includes a rotating member having at least one channel extending therethrough, operative to act as a centrifugal pump, and also includes apparatus for recording or playback of information from the information carrier.

Abstract: A wideband optical beam deflector utilizes an electromechanical transducer to simultaneously rotate a plurality of mirrors. An incoming optical beam is successively reflected by these rotating mirrors such that the deflections of the mirrors are additive.

Abstract: An apparatus for automatically connecting and disconnecting a battery backup supply senses when the potential of a main d.c. power supply drops below a first predetermined value, and in response thereto connects the battery backup supply to an electrical load. The apparatus also senses when the potential of the battery backup supply drops below a second predetermined value and in response thereto disconnects the battery backup supply from the electrical load.

Abstract: An apparatus provides a measurement of the running torque of a bearing under a radial load, by utilizing a balanced radial load on the bearing and a pendulum weight. The steady state running torque of the bearing is proportional to the sine of the deflection angle of the pendulum weight.

Abstract: A low friction bearing starting torque apparatus applies a known acceleration to a stationary bearing having a known radial load, to measure the starting torque of the bearing.

Abstract: A recorder for placing linguistic character information on photosensitive media. The recorder utilizes a small number of selectively energizable light sources, relative motion between the light from those sources and the photosensitive media, and electronics to coordinate sequential flashing of those light sources to such motion to form individual or sequences of linguistic characters on the photosensitive media. The disclosed embodiment is a microfilm camera that places linguistic characters on microfilm in response to externally supplied character data. The microfilm camera includes a camera box and seven discrete, selectively energizable light sources that are fixedly mounted with respect to the camera box. A portion of photosensitive microfilm is fixed at least temporarily with respect to the camera box. A size reduction lens that is in motion for a period of time focuses light from the light sources upon various areas of the microfilm.

Abstract: A magneto-optical disc recording apparatus arranged such that the magneto-optical disc is recorded by irradiating the magneto-optical disc with a recording light beam from an optical pickup head device under the condition that the optical pickup head device is applied with an external magnetic field by external magnetic field generating means. In this magneto-optical disc recording apparatus, a spacer sheet is located on the magneto-optical disc, whereby the external magnetic field is applied to the magneto-optical disc under the condition that the external magnetic field generating means is brought in contact with the spacer sheet.