摘要:
The present invention provides a plastic lens, used in an optical system of an optical image recording apparatus, which is low in birefringence, and is less susceptible to displacement of focus caused by resistance to environment. At least a part of a non-effective area is concave, and there is a sink mark in the concave portion. The shape of the concave portion is determined so as to achieve a GI ratio (&Dgr;f/f0)≦5%.
摘要:
A multi-channel rotary joint including a first joint structural member rotatably linked to a second joint structural member. Sealing regions defined and formed by mechanical seals that are lined up concentrically around relative rotational axis are provided between opposing peripheral surfaces in a relative rotational axial direction of the first and second joint structural members. A plurality of channels passing independently through the sealing regions (except for the sealing region which is used as a drain region) are provided for the first and second joint structural members, and an electrical wire insertion path is provided so as to pass through the inner peripheral region of a mechanical seal that has the smallest diameter. A drain path that opens into the drain region is provided for the joint structural member.
摘要:
A communication terminal apparatus (12) and a computer apparatus (14) are provided which enable systematic arrangement of information with respect to operations such as communication management information of a communication terminal apparatus and saving of recording paper. Report data is accumulated in accordance with information with respect to operations of the apparatus. When a request for sending a report is sent from the computer apparatus (14) via an interface (13), the accumulated report data is sent to the computer apparatus via the interface (13).
摘要:
An optoelectronic integrated circuit device which has less signal damping and signal transmission loss is provided. The optoelectronic integrated circuit device of the present invention includes a first optoelectronic integrated circuit and a second optoelectronic integrated circuit. Each of the first optoelectronic integrated circuit and the second optoelectronic integrated circuit includes an electric circuit unit, an optical output terminal unit, and an optical input terminal unit. The first optoelectronic integrated circuit and the second optoelectronic integrated circuit are arranged so that each optical output terminal unit faces each corresponding optical input terminal unit. In this arrangement, light signal transmission can be carried out between a plurality of optoelectronic integrated circuit devices. Thus, signal damping and transmission loss can be reduced, and signal transmission delay time can be shortened.
摘要:
A wire bonding method and apparatus implement the flatly thinner plastic deformation for the joint section of a wire, which has a diameter ranging 100-600 &mgr;m, on its feed side, feed out and position the flatly deformed wire joint section to a target joint surface, and join the wire to it by pressing the positioned wire joint section, with vibration being applied, onto the joint surface with a ultrasonic wire bonder. A high-power semiconductor device fabricated based on this scheme has a long life of wire joints.
摘要:
IGBT modules, bus bars and capacitors in an inverter main circuit are secured on the front face of a heat sink and at the back side of the heat sink a water cooling channel is formed to cool the IGBT modules. The bus bars and the capacitor, thereby the size of an inverter device used in an electric car is reduced and the duration thereof is prolonged.
摘要:
A pure steam-related apparatus, which is one of apparatus in the group of pure steam generators generating pure steam from purified water, pipelines for pure steam and sterilizers using pure steam, is protected from discoloration, so-called "fouling", to red or black caused by contact with the pure steam. The apparatus is manufactured by using an austenitic stainless steel sheet as the material, by taking the blanks from the material which received no mechanical surface polishing, by deforming and welding, without electrolytic polishing customarily done, and by passivating the surface to contact pure water to increase Cr-content in the passivation film to such extent as 45 atomic % or higher, preferably 55 atomic % or higher. Better results will be obtained by ensuring Cr/Fe ratio in the passivation film at the level of 1.45 or higher, preferably, 1.70 or higher.
摘要:
An engine driven arc welder including a welding generator driven by an engine; output circuits for controlling the output of the welding generator in accordance with a control signal and for delivering the output to welding output terminals; a current detector for detecting the current flowing in the welding output terminals; an error detector for comparing the output of the current detector with a reference signal to detect error; a control signal producing circuit for producing the control signal in accordance with output of the error detector and for delivering it to the output circuit; and a voltage detector R10, VR10 for detecting voltage to be delivered to the welding output terminals, wherein the arc welder has a welding output characteristic having a constant current control arc characteristic in accordance with the reference signal and which exhibits a drooping characteristic in the vicinity of the arcing voltage and which is capable of increasing the current when the arc voltage is lowered. The engine driven arc welder includes an adjustment circuit VR10, R10, VR20, R20 for determining the magnitude of the reference signal to be delivered to the error detector in accordance with the output of the voltage detector to change the reference signal, thereby allowing the inter-characteristic transfer point between the constant current control arc characteristic and the drooping characteristic to be adjustable.
摘要:
A material is provided for immobilization of biologically active substances which are reactive with a carbodiimide group. The material contains a carbodiimide group-containing polymer supported on a carrier such as a plastic, an inorganic polymer, a metal, a natural polymer or a ceramic. The carbodiimide group-containing polymer has 2 to 100 carbodiimide groups per molecule and a molecular weight of 1,000 to 100,000, and is prepared by carbodiimidization of an organic polyisocyanate in the presence of a catalyst. The polymer may be supported as a film on part or the whole area of the carrier. Biologically active substances that may be immobilized include enzymes, hormones, antibodies, antigens, heptenes, peptides, DNAs and RNAs.
摘要:
A semiconductor device, suitable for use in an invertor device for large currents in which IGBT chips are used and of which a high reliability is required, has an insulating plate on which are mounted semiconductor chips, a resin case enclosing the semiconductor chips, a filler resin filled into the resin case and covering the semiconductor chips and filling in the space between the semiconductor chips and the resin case, and a heatsink to which the insulating plate is attached, wherein, for purposes of attaching the insulating plate to the heatsink, the resin case is used to press the insulating plate onto the heatsink. Some benefits of this construction are that is makes it possible to eliminate the problem of fatigue failure of a solder layer previously used for attaching the insulating plate to the heatsink by dispensing with that solder layer, while at the same time improving the transfer of heat from the insulating plate to the heatsink, and thereby improving the removal of heat from the device. The construction also makes it possible to reduce cracking of the insulating plate, reduce breakage of mounting portions of the resin case and to use the device to make a small, thin, light and highly reliable invertor device.