Abstract: An acoustic surface wave filter element provided with two input and two output pins connected with the input and the output interdigital electrodes, respectively and an earth pin connected with a filter element shield casing is disposed on one surface of a circuit board, with the five pins extending through corresponding through holes in the circuit board to the other surface of the circuit board on which the pins are connected with corresponding conductive circuit patterns of the circuit board. The circuit patterns include a first signal pattern to be connected with one of the input pins, a first earth pattern connected with the other of the input pins, a second and a third signal pattern connected with one and another of the output pins, and a second earth pattern connected with the earth pin of the filter element.

Abstract: An enclosed switchboard in which an upper chamber and a lower chamber are formed within a switchboard frame in the form of a box for accommodating electrical apparatus such as circuit breakers. At the free surfaces of the frame facing the two chambers a top level door and a bottom level door facing the two chambers are mounted so as to be capable of being opened and closed separately from one another. A middle level door for the mounting of instruments is mounted between the top level door and bottom level door, and instruments needed for regular inspection and control, for instance meters, operating switches, indicator lamps and the like, are mounted on the door surface of the middle door.

Abstract: A photomask comprising a substrate pervious to light having one or more transparent islands and one or more opaque islands formed on one surface thereof, the thickness of the transparent islands being greater than that of the opaque islands. When this photomask is used to pattern a photoresist, the gas evolved from the photoresist can be effectively led to the outside, so that the quality of contact between the semiconductor wafer and the photomask is improved.

Abstract: The apparatus comprises a phase detection circuit for detecting the phase difference between two input signals to produce a single output which is supplied to charge a capacitor through a gate circuit and a unidirectionally conductive element. The terminal voltage of the capacitor is applied to one control terminal of a differential load circuit. The other control terminal of the load circuit is connected to receive the voltage produced by a bias circuit similar to the gate circuit.

Abstract: A wear-resistant alloy for an atomic power plant which is essentially formed of 10 to 45% by weight of chromium; 1.5 to 6% by weight of at least one metal component selected from the group consisting of aluminium and titanium; 0 to 20% by weight of molybdenum; and nickel as the remainder, and atomic power plant parts prepared from the alloy having said composition.

Abstract: A liquid level detector for detecting whether a boundary surface between a liquid and a medium rises beyond a prescribed level comprises a rectangular prismatic refractor body formed of a material which only allows the transmission of a light having particular wavelengths and absorbs light having other wavelengths. The refractor body have first and second inclined flat surfaces and a base. The base of the refractor body is provided with a light-emitting element for projecting a beam of light having the particular wavelength and a photoelectric conversion element for converting the light to an electric signal. Each of these element is equidistantly spaced from the center of the base, and the optical axis of each of these elements defines an angle of 45.degree. with each of the inclined surfaces of the refractor body.

Abstract: An elastic surface wave device includes a transducer having an elastic surface wave propagated in the direction of 75 to 133 degrees to a Y-axis on an X-cut lithium tantalate (LiTaO.sub.3) substrate.

Abstract: A solid state image pickup device utilizing a charge coupled device (CCD) includes an imaging section for converting a projected optical image into an electric charge corresponding to a quantity of light, a storage section for storing the electric charge transferred from the imaging section, a readout section for delivering as a video output signal the electric charge sequentially transferred from the storage section, a drive means for transferring the electric charge, and an erasing section for erasing an unrequired portion of the electric charge. The erasing section is an erasing drain formed by diffusion on a P-type semiconductor substrate of CCD and includes an erasing electrode connected to the erasing drain.

Abstract: A developing apparatus includes a cylindrical drum having a photosensitive layer provided around the outer peripheral surface thereof, and a magnetic roller mounted within a receptacle and having permanent magnets oriented in a body thereof and a rotating cylindrical sleeve provided on the outer peripheral surface of the body thereof. The receptacle holds a developer mixture including powdered iron and toner and it is opened to provide a magnetic brush exposure window where the magnetic roller and cylindrical drum face each other with a gap left therebetween. The magnetic roller continuously supplies the developer mixture in the form of a magnetic brush toward the gap between the magnetic roller and the cylindrical drum. A doctor blade is attached to the lowest edge portion of the exposure window to restrict the thickness of the magnetic brush.

Abstract: An elastic surface wave device includes a transducer having an elastic surface wave propagated in the direction of 75 to 133 degrees to a Y-axis on an X-cut lithium tantalate (LiTaO.sub.3) substrate.

Abstract: A refrigerating apparatus having two evaporators which are mounted respectively in the refrigeratory food compartment and the frozen food compartment, and wherein the refrigerant gas flow in the evaporator of the refrigeratory food compartment is controlled by both temperatures of the refrigeratory food compartment and the frozen food compartment.

Abstract: A gate turn-off thyristor which comprises a semiconductor body having at least four contiguous layers, namely, a first layer of a first conductivity type, a second layer lying continguous to the first layer and having a second conductivity type, a third layer lying contiguous to the second layer and having said first conductivity type, and a fourth layer contiguous to the third layer and having said conductivity type;an anode electrode mounted on said first layer;a gate electrode formed on said third layer; anda cathode electrode deposited on said fourth layer, and in which the following two relations are satisfied:.rho..multidot.V.sub.j /.rho..sub.sb .gtoreq. 10.5(v.multidot.cm) and .rho..sub.sb .ltoreq. 35 (.OMEGA./ )where .rho..sub.sb = sheet resistance (.OMEGA./ ) at the normal temperature of the third layer, V.sub.j = backward withstanding voltage (V) at a PN junction bertween the third and fourth layers, and .rho. = specific resistance (.OMEGA..multidot.cm) of the second layer.

Abstract: The first and second intrinsic semiconductor layers of thickness d are formed on a P type semiconductor substrate, keeping a prescribed interval therebetween, whereby a groove of depth d may be made between these layers. A dielectric layer is formed in such a way that it may cover a base and sides of the groove and a surface of the intrinsic semiconductor layer. On this surface, a gate electrode formed of polysilicon exists. Diffusion regions of a source and a drain of depths X.sub.sj and X.sub.dj are formed, in the neighborhood of groove sides, in the first and second intrinsic semiconductor layers (X.sub.sj, X.sub.dj d), resulting in an MOS transistor.

Abstract: The present invention relates to an exposure computation circuit by means of which a computation is carried out with the values inversely proportional to all the exposure factors excepting the diaphragm value of the APEX system so as to obtain computation results in proportional relation with the actual shutter time value or the actual diaphragm value in order to control the exposure basing upon the computation results.

Abstract: A surface-treating agent formed of an aqueous solution containing 0.01 to 20% by weight of trialkyl(hydroxyalkyl) ammonium hydroxide. The treating agent is adapted to be used for the effective removal of organic and inorganic contaminants deposited on the surface of intermediate semiconductor products obtained in the respective steps of manufacturing a semiconductor device and the efficient etching of a metal layer used as wiring. Further, it can be used for the elimination of those portions of a positive working photoresist film coated on the surface of the intermediate semiconductor products which are and are not exposed to a light by controlling its concentration.

Abstract: A highly evacuated X-ray image intensifier, whose X-ray inlet window section made of aluminium or alloy thereof is hermetically fused to the output section of a glass vessel by means of a joint ring formed of glass-wettable alloy or alloy fusible with glass, wherein the X-ray inlet window section and joint ring are hermetically fused together by inserting therebetween at least one intermediate member selected from the group consisting of the following materials:(a) tin(b) silicon--gold(c) silicon--tin(d) germanium--gold(e) germanium--tin

Abstract: A temperature-compensated amplifier circuit including an amplifier section having first and second transistors which are connected at their collectors to a power source terminal through first and second resistors, and having d.c. biased bases coupled to signal source terminals; a current source including a third transistor having a collector coupled with the emitters of the first and second transistors and a grounded emitter; a fourth transistor having an emitter coupled with the power source terminal through a third resistor; a fifth transistor connected at the emitter to the power source terminal and at the base to the base of the fourth transistor; a sixth transistor having both base and collector commonly coupled to the collector of the fourth transistor and grounded at the emitter; and a seventh transistor connected at the collector to the base and the collector of the fifth transistor, at the base to the bases of the third and sixth transistors and grounded at the emitter.

Abstract: In a plural beam color picture tube, convergence of the beams is achieved by means of non-uniform main deflection fields and of induced flux fields. For this purpose, a pair of supplementary coils are disposed adjacent the toroidally-shaped high permeability magnetic core on which the horizontal windings are turned.

Abstract: A home hair-setter whose body is a cylindrical heat-resistant elastic member and wherein the outer peripheral surface of the body of the hair-setter is used to curl hair; the hair-curling section of the body is enclosed in a cylindrical envelope; and the body of the hair-setter has at least one of its both ends left open.