Abstract: An igniter transformer includes a secondary coil and a primary coil which are closely coupled. A plurality of round single-core wires disposed substantially parallel to one another in a common plane are bonded side by side to form a flat multicore wire that is substantially rectangular in cross-section. The secondary coil includes the flat multicore wire which is edgewise wound such that the larger surfaces of the flat multicore wire face each other in the turns while standing upright. The primary coil includes a wide thin metal sheet wound substantially perpendicularly to an axis of the secondary coil.

Abstract: A high-voltage transformer includes a bobbin that holds a core at its center. This bobbin has eight winding grooves arrayed along the central axis of the core. A primary coil is wound around each of two outermost winding grooves with a predetermined number of turns. A secondary coil is wound around the six winding grooves near the center with a predetermined number of turns, which are distributed among these winding grooves. The cathode of a diode is connected through a terminal to one end of the secondary coil where the winding starts, while the anode of another diode is connected through another terminal to the other end of the secondary coil where winding ends.

Abstract: An igniter transformer includes a secondary coil and a primary coil which are closely coupled. A plurality of round single-core wires disposed substantially parallel to one another in a common plane are bonded side by side to form a flat multicore wire that is substantially rectangular in cross-section. The secondary coil includes the flat multicore wire which is edgewise wound such that the larger surfaces of the flat multicore wire face each other in the turns while standing upright. The primary coil includes a wide thin metal sheet wound substantially perpendicularly to an axis of the secondary coil.

Abstract: A high-voltage transformer includes a bobbin that holds a core at its center. This bobbin has eight winding grooves arrayed along the central axis of the core. A primary coil is wound around each of two outermost winding grooves with a predetermined number of turns. A secondary coil is wound around the six winding grooves near the center with a predetermined number of turns, which are distributed among these winding grooves. The cathode of a diode is connected through a terminal to one end of the secondary coil where the winding starts, while the anode of another diode is connected through another terminal to the other end of the secondary coil where winding ends.

Abstract: The number of layers of a secondary winding of a flyback transformer for use in a PWM controlled high-tension voltage generator is increased to six or higher. The distributed capacitance of the flyback transformer is thus decreased, the frequency of ringing is increased, and the pulse width of a flyback pulse is narrowed. The timing of the on-operation of a control FET is expedited, and the input current to the flyback transformer is lowered. A compact and power-saving flyback transformer thus results.

Abstract: A flyback transformer includes an anode lead wire composed of a core wire and an insulating film for covering the core wire and supplying a high output voltage to a CRT. A cylindrical anode lead holding device includes engagement pieces have spring-like properties which allows the pieces to restore to their original positions after having been extended in a radial direction. These engagement pieces project from the inner surface of the anode lead holding device and hold the anode lead wire. The anode lead wire has a groove engages the engagement pieces, such that the anode lead wire is held by the anode lead holding device.

Abstract: A high voltage generation circuit including a transformer, the transformer having a primary winding having a primary inductance; a power supply for supplying a voltage to the primary winding of the transformer; a switching element for controlling current flowing through the primary winding of the transformer from the power supply; and a resonance capacitor which resonates with the primary winding of the transformer when the switching element is off, so that a flyback pulse is generated. The circuit has a distributed inductance and a resonance capacitance. The switching element is controlled so as to be switched on nearly at the bottom of a quiescent ringing pulse which is produced by a resonance of the primary inductance of the transformer with a capacitance included in a circuit connected to the primary winding of the transformer, after the flyback pulse is generated.

Abstract: A flyback transformer includes a coil having a secondary multi-layered winding. A dividing diode has a plurality of diodes. The diodes are connected between each of multi-layered winding portions of the secondary winding. The respective diodes are connected between the low potential-side and the high potential-side of the secondary winding. A dynamic focus capacitor is connected to an input portion into which a parabolic signal for obtaining a dynamic focus output is input. In one embodiment, the dynamic focus capacitor is disposed near the central portion of the winding length of the secondary winding, that is, near the AC zero potential point.

Abstract: The number of layers of a secondary winding of a flyback transformer for use in a PWM controlled high-tension voltage generator is increased to six or higher. The distributed capacitance of the flyback transformer is thus decreased, the frequency of ringing is increased, and the pulse width of a flyback pulse is narrowed. The timing of the on-operation of a control FET is expedited, and the input current to the flyback transformer is lowered. A compact and power-saving flyback transformer thus results.

Abstract: A high voltage generation circuit comprising a transformer, the transformer having a primary winding having a primary inductance; a power supply for supplying a voltage to the primary winding of the transformer; a switching element for controlling current flowing through the primary winding of the transformer from the power supply; and a resonance capacitor which resonates with the primary winding of the transformer when the switching element is off, so that a flyback pulse is generated. The circuit has a distributed inductance and a resonance capacitance. The switching element is controlled so as to be switched on nearly at the bottom of a quiescent ringing pulse which is produced by a resonance of the primary inductance of the transformer with a capacitance included in a circuit connected to the primary winding of the transformer, after the flyback pulse is generated.

Abstract: A flyback transformer includes an anode lead wire composed of a core wire and an insulating film for covering the core wire and supplying a high output voltage to a CRT. A cylindrical anode lead holding device includes engagement pieces have spring-like properties which allows the pieces to restore to their original positions after having been extended in a radial direction. These engagement pieces project from the inner surface of the anode lead holding device and hold the anode lead wire. The anode lead wire has a groove formed on a part of or around the whole circumference of the insulating film. The groove engages the engagement pieces, such that the anode lead wire is held by the anode lead holding device.

Abstract: A flyback transformer has a high-voltage bobbin. The bobbin is provided with a focus-pack connection terminal in addition to electronic-component mounting terminals. The focus-pack connection terminal is connected to one of the electronic-component mounting terminals which provides the desired high voltage. When the desired voltage changes, the focus-pack connection terminal is simply connected to another one of the electronic-component mounting terminals corresponding to the changed voltage, easily changing the focus-pack supply voltage.

Abstract: A method and apparatus for reproducing an information signal recorded on a disc at a high reproducing speed by moving a reproducing light beam for reproducing the information signal across a track along which the information signal is recorded one or a plurality of times one track pitch by one track pitch. The movement of the reproducing light beam is caused responsive to a driving signal produced for a predetermined number of times consecutively by reading out a table providing a relation between the desired reproducing speed and the number of times the reproducing light beam is to be moved.

Abstract: A control circuit for controlling the erasing of an information signal recorded on an optical disk such that the information signal is erased except for the vertical blanking interval and for the interval corresponding to the address signal of the information on the disk. The rest of the information signal including the horizontal synchronizing signal is erased either continuously or intermittently or is not erased. The circuit produces a control signal which assumes a first logical state for enabling the erasing and a second logical state for disabling the erasing responsive to a horizontal synchronizing signal, a vertical synchronizing signal and a command signal commanding the erasing of a particular information signal on the disk.

Abstract: An information recording disc has a control signal such as an address signal pre-recorded on a guide track which is pre-formed on the information recording disc at a position different from a track position where an information signal is to be recorded. An information signal recording apparatus for recording the information signal on such an information recording dics controls a rotation frequency of the information recording disc to a constant rotation frequency by locking a horizontal synchronizing signal within a composite video signal to edges of pulses reproduced from the guide track, and the information signal is recorded on the information recording disc so that a recording interval of the control signal is positioned within a vertical blanking period of the information signal at least including the composite video signal.

Abstract: Fine particles of a metal such as copper and silver can be obtained by reducing the corresponding metal compound solution with one or more reducing agents selected from the group consisting of L-ascorbic acid, L-ascorbate, D-erythorbic acid and D-erythorbate. Silver-palladium composite particles can also be obtained similarly by employing a colloidal palladium liquid and a silver compound solution.

Abstract: A disc comprises a recording surface which is divided into a plurality of equiangular sectoral regions and a guide track formed on the recording surface. Each track turn of the guide track is constituted by a row of pits formed in every other equiangular sectoral regions, and the pit is only formed in one of two mutually adjacent track turns of the guide track in each equiangular sectoral region so that the pits are formed in every other track turns in a radial direction of the disc in each equiangular sectoral region.

Abstract: An information recording disc has a control signal such as an address signal pre-recorded on a guide track which is pre-formed on the information recording disc at a position different from a track position where an information signal is to be recorded. An information signal recording apparatus for recording the information signal on such an information recording disc controls a rotation frequency of the information recording disc to a constant rotation frequency by locking a horizontal synchronizing signal within a composite video signal to edges of pulses reproduced from the guide track, and the information signal is recorded on the information recording disc so that a recording interval of the control signal is positioned within a vertical blanking period of the information signal at least including the composite video signal.

Abstract: An optical recording and reproducing apparatus comprises an optical disc having a recording surface; a laser diode emitting a laser beam; an optical lens for changing the laser beam into a parallel laser beam; a diffraction grating for diffracting the parallel laser beam and generating 0-order and .+-.1st diffracted lights, a light intensity ratio of each of the .+-.1st diffracted lights to the 0-order diffracted light ranging from 8:1 to 9:1; and an optical system for forming spot lights of the 0-order and .+-.1st diffracted lights on the recording surface of the disc and extracting the 0-order and .+-.1st diffracted lights which have been reflected from on the recording surface.

Abstract: A rotation control apparatus for a CLV system disc sets an initial value based on an address signal reproduced from the CLV system disc and carries out a rotation control by use of the initial value, so that it is possible to carry out the rotation control even with respect to a CLV system disc on which an information signal is only recorded up to an intermediate position within a program region of the disc. An information signal is newly recordable in conformance with the CLV system from a position in a vicinity of the intermediate position where the previous recording had been discontinued.