Abstract: An electromagnetic interference suppression filter for use with electric circuits including a filter unit comprising a pair of capacitors provided with through holes extending through the axes thereof, respectively, a substantially U-shaped penetration shaft having its two legs fitted through the through holes, respectively, and a ferrite bead mounted on at least one of the two legs of the penetration shaft, the filter unit being mounted on a metal plate by fitting the two legs into holes provided therein, one electrode of each capacitor being conductively connected to the leg, while the other electrode thereof is conductively connected to the metal plate, respectively, the filter unit thus integrated being easily mountable on a printed circuit board or the like thereby resulting in an electromagnetic interference suppression filter of a simplified construction suitable for mass production and having high filter characteristics.

Abstract: A piezoelectric vibrator includes an elongated piezoelectric plate deposited with electrodes for effecting mechanical vibration in the piezoelectric plate. A damper is deposited at each of opposite ends of the elongated piezoelectric plate so as to reduce the size of the piezoelectric plate.

Abstract: A piezoelectric filter of three terminal type which includes a piezoelectric substrate having one main surface at its one face and the other main surface at its other surface, an input electrode and an output electrode respectively provided on the one main surface of the piezoelectric substrate and a common electrode provided on the other main surface of the piezoelectric substrate. The output electrode is provided so as to face or confront the input electrode in a spaced relation from the input electrode, while the common electrode is arranged selectively not to confront, or to confront, to a certain extent at its peripheral edge portion, the output electrode through the piezoelectric substrate.

Abstract: An improved high voltage generating device such as a fly back transformer or the like which includes a first casing open at one side face thereof and accommodating therein high voltage electrical components, a second casing which is mounted in a cut-out portion formed in a side wall of the first casing and open at its one edge, and an electrically insulating material filled in a space within the first casing. In the above high voltage generating device, undesirable leakage of insulating material between a cut-out portion of a casing and a high voltage variable resistor during its injection into the casing is advantageously prevented without necessity for employing extra parts such as packings, etc., and thus the assembly work is simplified, with consequent reduction in cost.

Abstract: A method for processing a waste solution used in a chemical plating process and including a heavy metal complex salt, a reducing agent, and a pH adjusting agent. The heavy metal complex salt is decomposed into a heavy metal component and a complexing agent component by applying ultrasonic vibration to the waste solution. The heavy metal component obtained by decomposition is in a powder state. Then the waste solution is filtered, so that the heavy metal component may be separated from the complexing agent component.

Abstract: A piezoelectric device having a casing and a piezoelectric unit supported in the casing by the use of a direction-oriented electroconductive pliable sheet. The piezoelectric unit has a plate-like shape with electrodes laminated on its opposite surfaces. The electrode provided on one surface of the piezoelectric unit extends and is disposed on the opposite surface for gathering all the electrodes on the opposite surface.

Abstract: A humidity sensitive ceramics comprises a sintered body consisting essentially of a semiconductive compound oxide with a perovskite structure and a compound oxide, said semiconductive compound oxide having a composition expressed by the general formula (I):A.sub.1-x A'.sub.x BO.sub.3-.delta.. . . (I)wherein A is at least one element selected from the group consisting of rare earth elements with atomic numbers 57 to 71, yttrium and hafnium, A' is at least one element selected from the group consisting of alkaline-earth metals, B is at least one element selected from the group consisting of transition elements with atomic numbers 23 to 30, x is a mole fraction and takes a value of the following range, 0.ltoreq.x.ltoreq.1, and .delta. is a non-stoichiometric parameter, said compound oxide having a composition expressed by the general formula (II):AMO.sub.3 . . .

Abstract: A surface acoustic wave device includes a piezoelectric substrate, transmitting and receiving transducers provided on the surface of the substrate for propagating acoustic waves between the transducers, and absorbers provided between an end of the substrate and respective transducers for absorbing unwanted acoustic waves. The shape of the absorber is in relation to the energy distribution of the acoustic waves.

Abstract: A casing of a box-like shape of a rectangular parallelepiped is formed which has one side portion or each of a pair of opposing side portions formed with an opening and has a partitioning member therein. A plurality of plate like piezoelectric resonators and terminal plates are placed in the casing in parallel with the upper and bottom portions of the casing so that the same are housed in a stacked manner. The plurality of piezoelectric resonators and terminal plates as housed are partitioned into two groups by means of the partitioning member. Accordingly, the height of the casing is determined by the thickness of each plate like piezoelectric resonator and the number of the resonators, with the result that the height of the casing can be decreased to be a thin type. A blocking member or members are provided to one opening or two opposing openings formed on the side portion or portions. The piezoelectric resonators and terminal plates are blocked by the blocking member from being slipped out from the casing.

Abstract: A cathode-ray tube socket substrate for use with a cathode-ray tube of a cathode-ray tube display unit such as a television receiving set comprising a cathode-ray tube socket mounted on an insulation substrate with its pin terminals securely connected to electrodes provided thereon. On the insulation substrate there are provided discharge electrodes in opposition to each other between the terminal electrodes and earth electrode, recesses for discharge gaps being provided between the discharge electrodes respectively, said recesses being covered by a sheathing member, the discharge means being integrally composed with compactness thereby enabling to miniaturize the whole socket substrate, stabilize the discharge action, and reduce the spark noises.

Abstract: A piezoelectric plate is formed in a configuration defined by four sides, each pair of two adjacent sides defining an angle of each corner. In the case where the piezoelectric plate is configured as a rectangle or a parallelogram, two opposite sides have the same longer length, while the remaining opposite two sides have the same shorter length. For the purpose of suppressing a spurious vibration, the side ratio of the shorter side to the longer side is selected to be 0.7 to 0.98 in the range where no influence is exerted upon a vibration of the fundamental wave. In the case where the piezoelectric plate is configured as a parallelogram or a rhombus, it follows that two opposite angles out of the four angles are the same obtuse angle, while the remaining two opposite angles are the same acute angle. For the purpose of suppressing a spurious vibration, the above described acute angle is selected to be 75.degree. to 89.degree. in the range where no influence is exerted upon a vibration of the fundamental wave.

Abstract: A ceramic capacitor arrangement includes a cylindrical ceramic body having a socket formed at each end thereof, and an electrode film deposited on each end of the ceramic body. A terminal pin is pressure-fitted into each socket and is temporarily held therein. A solder bead is deposited on each of the electrode film to secure the terminal pin rigidly in each socket.

Abstract: A heating device for heating fluid is disclosed. The heating device includes a tanning unit including a thermistor element having a positive temperature coefficient characteristic and adapted to generate heat when electric power is applied thereto. At least one heat dissipating means having a plurality of through-holes defined therein is mounted on the heating unit in thermal conductive relation with the heating unit such that heat generated by the heating unit is transmitted to the heat dissipating means to heat fluid flowing through the through-holes. The thermistor element includes a pair of electrodes between which heating current flows. The location of the electrodes is chosen such that the current flows in a second direction, substantially perpendicular to the first direction.

Abstract: The disclosure relates to an improved microwave device which includes a casing of electrically conductive material, at least two coaxial resonators, for example, 1/4 wavelength coaxial TEM resonators each having dielectric member disposed between an inner conductor and an outer conductor of the coaxial resonator and a terminal electrode secured in the inner conductor to provide a terminal portion projecting from an end face of each of the coaxial resonators. The resonators are accommodated in the casing so as to be electrically connected and mechanically secured to the casing. A dielectric plate member connecting input and output terminals of the device is provided at least two coupling electrodes spaced predetermined intervals from each other are provided on the dielectric plate member. The microwave device is arranged to obtain coupling electrostatic capacity mainly between the coupling electrodes provided on the main flat surface of the dielectric plate member.

Abstract: The present invention is directed to a tuning fork wherein a damping piece is provided, either integral with said tuning fork vibrator or a separate piece attached thereto, and wherein a damper member is intersected between said damping piece and a housing for accommodating the tuning fork vibrator.Since the (1/2)f.sub.O spurious response which is caused in the tuning fork vibrator to be spread within the damping piece is adapted to be absorbed by the damper member, the tuning fork is made smaller in shape.

Abstract: A ceramic dielectric composition of a ternary system Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 -Pb(Zn.sub.1/3 Nb.sub.2/3)O.sub.3 -PbTiO.sub.3, comprising 69.05-69.60% by weight of Pb.sub.3 O.sub.4, 2.41-4.00% by weight of MgO, 0.08-3.15% by weight of ZnO, 24.01-26.66% by weight of Nb.sub.2 O.sub.5 and 0.13-2.59% by weight of TiO.sub.2. The composition can be sintered at a low firing temperature less than 1,150.degree. C., and has a high dielectric constant above 10,000.

Abstract: A feedback circuit for use in an oscillator has a piezoelectric oscillating unit constituted by a square plate-like piezoelectric body, first and second electrodes provided on one surface of the piezoelectric body and a common electrode provided on the other surface of the piezoelectric body. The piezoelectric body is polarized in one direction between the first and common electrodes and in the opposite direction between the second and common electrodes.

Abstract: A shield case having openings at both ends is fabricated by drawing a blank and the opening at one end of the shield case is formed at the periphery thereof as a flat annular receiving portion, with a portion intermediate the receiving portion and the case side surface curved with a gentle curvature. A capacitor including a doughnut shaped dielectric unit is disposed inside the shield case contiguous to the receiving portion and a metallic cylinder is provided extending through the aperture of the dielectric unit of the capacitor and the one end opening of the shield case. One electrode is formed on one main surface of the doughnut shaped dielectric unit, while the other electrode is formed on the other main surface of the unit and a lead out electrode is also formed around the aperture on the other main surface of the unit electrically isolated from the said other electrode.

Abstract: A humidity sensitive device comprises a base body of a preferably porous semiconductive ceramic having a grain boundary. A high resistance layer is formed in the grain boundary of the semiconductive ceramic and exhibits a humidity sensitive characteristic. First and second electrodes for withdrawing an electrical signal are formed spaced from each other on at least one major surface of the semiconductive ceramic base.

Abstract: A structure of a copper conductor is obtained by oxidizing copper film formed on the surface of a substrate, and by heat treating the same in a reducing atmosphere, whereby only the surface layer portion of the oxidized copper film is reduced to become copper. The copper film of a conductor is formed on the surface of the substrate with the oxidized copper film interposed therebetween. As a result, an adhesion of the copper film to the surface of the substrate is enhanced.