Abstract: A method of obtaining a high-strength bonded body between composite materials, each containing a thermoplastic resin and carbon fibers, with a low current in a short period of time, wherein the bonded body is rarely susceptible to deformation such as warp. The method of manufacturing a bonded body, comprises the steps of: (i) preparing a plurality of composite materials, each containing a thermoplastic resin and discontinuous carbon fibers which are randomly oriented; (ii) overlapping the composite materials each other; (iii) sandwiching at least a part of the overlapped portion between a pair of electrodes; and (iv) applying electricity between the electrodes to weld together the thermoplastic resins with Joule heat.

Abstract: A polyphenylene sulfide resin coated article comprising: a molded article (A) of a polyphenylene sulfide resin material (a) which comprises a polyphenylene sulfide resin (a1), and a coated film layer (B) which is formed by applying a croating which comprises as a solid component a chlorinated polyolefin resin (b1) having a chlorine atom Content of 20 to 45% by mass on the surface of the molded article (A).

Abstract: A three-phase voltage-fed AC/DC converter includes a conversion circuit which converts power from a DC voltage source to three-phase AC power. The converter further includes a UM conversion circuit which carries out dq conversion of the three-phase output voltage, a superior voltage control circuit which outputs a voltage reference vector based on a superior reference vector and an output voltage vector obtained by the UM conversion circuit, an inferior voltage control circuit which outputs a PWM reference based on the voltage reference vector and the output voltage vector, and a frequency control circuit which synchronizes a value generated based on a q-axis component from the UM conversion circuit with a rotation angle of a conversion matrix in the UM conversion circuit.

Abstract: A three-phase voltage-fed AC/DC converter includes a conversion circuit which converts power from a DC voltage source to three-phase AC power. The converter further includes a UM conversion circuit which carries out dq conversion of the three-phase output voltage, a superior voltage control circuit which outputs a voltage reference vector based on a superior reference vector and an output voltage vector obtained by the UM conversion circuit, an inferior voltage control circuit which outputs a PWM reference based on the voltage reference vector and the output voltage vector, and a frequency control circuit which synchronizes a value generated based on a q-axis component from the UM conversion circuit with a rotation angle of a conversion matrix in the UM conversion circuit.

Abstract: A method of treating a disc plate. has the following operations of: molding a mold disc plate through an injection molding; and spinning the mold disc plate at a high spin speed. The spinning operation has at least one of the following two sub-operations of: reducing a warp of the mold disc plate with a centrifugal force caused during the spinning operation, and reducing a temperature of the mold disc plate during the spinning operation. Moreover, an apparatus of treating a disc plate has: a conveyer for conveying a mold disc plate obtained through an injection molding; a disc bench for receiving the mold disc plate conveyed with the conveyer; and a spin driver for spinning the disc bench when a temperature of the mold disc plate is higher than 90° C., to thereby spin the mold disc plate.

Abstract: The object of the present invention is to significantly inhibit the formation of voids between substrates bonded together when a liquid adhesive is supplied onto an optical disc substrate or when the optical disc substrate is bonded to another optical disc substrate. Accordingly, the present invention discloses a method for bonding two optical disc substrates together which comprises the steps of joining the optical disc substrates together with an adhesive and curing the adhesive, wherein the adhesive is supplied onto the optical disc substrate by an electric field formed between the adhesive-supplying nozzle, for supplying the adhesive onto the optical disc substrate, and the optical disc substrate, and the two optical disc substrates are then joined together and subjected to spun by a spinning process.

Abstract: In method and apparatus for manufacturing an optical disc, a transparent disc substrate having two relatively wide-area surfaces thereof on at least one of which an information is recorded and a first reflective film is formed onto a dummy disc having the similar relatively wide-area surfaces thereof on at least one which another information is recorded and a second reflective film having a light semi-transmissive characteristic is formed are bonded via an adhesive layer and, thereafter, an external force is applied between the dummy disc and the disc substrate through an integrated center hole penetrated through the dummy disc and the disc substrate at center positions thereof to peel off the dummy disc at a first interface between the dummy disc and the second reflective film thereof.

Abstract: A series resonant power converter in which a resonant copacitor is commonly used in a series resonant circuit and a parallel resonant circuit, whereby a capacitance of the resonant capacitor can be considerably decreased as compared with that of a tank circuit according to a prior art, so that an energy handled by the resonant capacitor can be decreased, which results in decreasing a size of the resonant circuit and also decreasing a power loss. The converter includes means for detecting and computing a voltage applied across a main switch means in its OFF-state and a control circuit for driving the main switch means to its ON-state when the detected and computed value of the voltage drops to a minimum voltage required to sustain oscillation of the series resonant circuit.

Abstract: A current detecting circuit for an X-ray tube is disclosed which includes a DC high voltage generating circuit connected across a filament and an anode of the X-ray tube and current detecting means connected in series in a filament circuit. The filament, which is at a high potential, receives a power from a secondary winding of an isolation transformer, which has sufficient dielectric strength to insulate a highest voltage generated by said DC high voltage generating circuit. A rectifier circuit is arranged to rectify a current fed from said secondary winding or another winding having same dielectric strength as that of said secondary winding, and said rectifier circuit supplies a power to a signal transmitting circuit. The signal transmitting circuit is energized, according to the current detected by said current detecting means, to transmit an output signal. The output signal is transmitted through electrically isolated transmission means to a signal receiving circuit, which is at a ground potential.

Abstract: A photo-electric converting apparatus comprises an array wherein a plurality of photo-electric converting elements are provided, each of which having a semiconductor film layer arranged between an electrode layer and another electrode layer formed on a substrate, and having at least either a rectifying contact or a P-N junction. When the array is irradiated with light under such condition that substantially no bias voltage is applied between the electrode layers of the array, each of the photo-electric converting elements produces forward e.m.f., and forward current flows. A capacitive means in each of the photo-electric converting elements is charged with the forward current, and the capacitive means are discharged successively by scanning pulses, and timed pulse signals are outputted. The present invention discloses further various concrete constructions of the photo-electric converting element and the array thereof with high efficiency of conversion.

Abstract: An active gas plasma arc torch and a method of operating the same, said torch including a rod-shaped cathode, a first gas passage formed around said cathode to feed a protecting gas or shielding gas, a second gas passage formed around said first gas passage to feed a plasma gas and a constricted port for discharging the plasma gas, characterized in that at least a part of the shielding gas which flows out from the first gas passage is removed from the inside of the torch at the position short of said constricted port of the torch, whereby the working quality and the working speed are substantially improved while the rod-shaped cathode is satisfactorily protected by the shielding gas.

Abstract: In the embodiment is specifically described a method for irradiating a transistor device with radiant rays. The top surface of the semiconductor crystal contained in the transistor device is exposed to the radiant rays so that the radiated energy impinging upon a preselected part of the base region, underneath the emitter electrode, is less than that impinging upon the other parts of the base region. Masking and radiant ray absorptive material are used to facilitate the process. Thereafter, the device and/or crystal is subjected to heat treatment to selectively improve such characteristics of the transistor as amplifying and switching characteristics to produce transistors suitable to a necessity of different applications.