Abstract: A piezoelectric ceramic for acoustic surface wave devices which consists essentially of a solid solution of the ternary system Pb(Sn.sub..alpha. Sb.sub.1-.alpha.)O.sub.3 -PbTiO.sub.3 -PbZrO.sub.3 having a composition showing a phase transition between a ferroelectric rhombohedral low temperature phase (F.sub.R(LT)) and a ferroelectric rohombohedral high temperature phase (F.sub.R(HT)) at a temperature within the range from -20.degree. C. to +80.degree. C. The solid solution consists essentially of a main component expressed by the formula:xPb(Sn.sub..alpha. Sb.sub.1-.alpha.)O.sub.3 -yPbTiO.sub.3 -zPbZrO.sub.3where in x+y+z=1.00, 1/4.ltoreq..alpha..ltoreq.3/4, and contains, as an additive, manganese in oxide form in an amount of 0.05 to 5.0 wt % when converted into MnO.sub.2 and, if necessary, further contains at least one element selected, from magnesium and chromium in oxide form in respective amounts of 0.05 to 5.0 wt % when respectively converted into MgO and Cr.sub.2 O.sub.3.

Abstract: A resonator device including an electrically conductive mounting member, at least one dielectric coaxial resonator mounted on the mounting member and an electrically conductive elastic member for securing the dielectric coaxial resonator to the mounting member. In the resonator device, the dielectric coaxial resonator is secured and electrically connected to the mounting member through elasticity of the elastic member.

Abstract: A liquid sensor mounted on the side wall of a liquid tank for detecting the existence of liquid in the tank. The sensor includes an element which generates a vibration in the direction of its thickness, of energy-trapped type for detecting the existence of liquid. The element consists of electrodes provided on both sides of a piezo-electric substrate, one side of the element for contacting the liquid in the tank being covered with a liquid-proof coating. The existence of liquid is detected from the change in resonance impedance or antiresonance impedance resulting from the liquid contact.

Abstract: A high permittivity ceramic composition comprises, by weight, 84.25 to 92.4% of substantially stoichiometric barium titanate; substantially stoichiometric calcium zirconate and substantially stoichiometric calcium stannate, the sum of said calcium zirconate and calcium stannate being 9.5 to 13.5%, the weight ratio of said calcium zirconate to calcium stannate being 1:2.5 to 3:1; 0.05 to 0.25% of substantially stoichiometric magnesium titanate; and 0.05 to 2.0% of at least one oxide of rare earth elements.

Abstract: A piezoelectric filter of the energy-trapped type which utilizes thickness shear mode is disclosed, wherein first and second resonator units are connected in a cascade manner. Each of the resonator units includes a piezoelectric plate which has a slit formed therein and a pair of front electrodes on the front thereof and a pair of back electrodes on the back thereof, with the slit lying between each pair of the electrodes. The pair of back electrodes of the second resonator unit are electrically connected to each other. The first and second resonator units are positioned so that the back electrodes of one of the two units face against those of the other, and then mechanically coupled together through the use of an electrically nonconductive adhesive. The back electrodes of the first and second resonator units are led commonly outwardly, while the pair of the front electrodes of the first resonator unit form an input electrode and an output electrode.

Abstract: A ceramic filter including a piezoelectric ceramic and input and output electrode groups disposed within the ceramic body. The input electrode group and the output electrode group extend toward each other from opposing sides of the piezoelectric ceramic. They do not meet, however, and a predetermined spacing, along the thickness dimension of the ceramic, separates the two electrode groups. The input and output electrode groups are each composed of a plurality of electrodes which overlap each other with ceramic layers interposed therebetween.

Abstract: A noise filter includes a capacitor having first and second electrodes, first and second terminal legs extending from the first electrode, and third and fourth terminal legs extending from the second electrode. The first and second terminal legs adapted for the path of electric signal, and the third and fourth terminal legs adapted for the path of ground level. The noise filter further includes first and second tubes mounted on the first and second terminal legs, respectively, and third and fourth tubes mounted on the third and fourth terminal legs, respectively. Each of the first, second, third and fourth tubes is made of a magnetic material, whereby high frequency noise signals can be filtered when signals pass through the noise filter.

Abstract: A vibrating element for the vibration under an expansion mode has a substrate made of a constant modulus alloy and has a rectangular configuration defined by opposite long sides and opposite short sides, a thin piezoelectric film deposited on the substrate, and a vibration electrode film deposited on the piezoelectric film. When an equivalent circuit of the vibrating element can be defined as including a resonance inductance L, a resistance R and a series capacitance Cs, which are connected in series and a parallel capacitance Cp, which is connected parallelly to the series connection of L, R and Cs, a ratio of short side to long side of the substrate is selected to have values around points where a ratio of parallel capacitance Cp to serial capacitance Cs shows negative peaks.

Abstract: A carrier which is used when a solution, as an analytical sample, is analyzed by X-ray fluorometry. The carrier comprises a medium having a central region with a plurality of alternate slits and support connections, each support connection defined between adjacent slits. The configuration defines an island-like portion contrasted with the surrounding region and serving to hold the analytical solution, with the presence of the slits preventing the analytical solution from permeating into the surrounding region. The island-like portion is formed with a plurality of fine through holes.

Abstract: The disclosure is directed to an improved FM demodulating circuit which is simple in circuit construction, with a small number of parts required, and so arranged that in a quadrature detecting circuit, a plurality of piezoelectric resonators, for example, ceramic discriminators employed for a phase shift circuit are changed over by switching circuits for common use of parts other than the ceramic discriminators for the demodulation of the FM intermediate frequency signals.

Abstract: An improved distribution constant type filter provided with a connecting arrangement which includes a through-opening formed in a dielectric block of the filter along a first cavity of a resonance unit at an initial stage, and a connector provided in the through-opening so that one end of the connector is electrically conducted to a conductive layer formed on part of the outer surface of the dielectric block, with the other end of the connector being connected to an external circuit to receive an input signal. The through-opening is preferably small in lateral cross section relative to the first cavity and positioned at a central portion in a widthwise direction of the dielectric block, and thus, coupling magnetic between the resonance unit and the external circuit suppresses a TE11 resonance mode in the filter.

Abstract: A multi-layer ceramic capacitor includes a rectangular ceramic body with terminal electrodes provided on its opposite ends. A set of electrode, including a plurality of electrode layers, extends from one terminal electrode into the ceramic body. A similar set of electrode extends from the other terminal electrode into the ceramic body. The plurality of electrode layers have their edges arranged in tiers and, therefore, the equipotential surfaces appearing around the tip end of electrode layers can be dispersed.

Abstract: A corrosion inhibiting coating for a metal surface, especially useful for electrical conductors, where the surface of the metal is covered with an organic corrosion inhibitor and an exterior layer of an inactive fluoric material thereon.

Abstract: A miniature inductor used as a boosting coil in a piezoelectric buzzer drive circuit or the like is disclosed. The inductor has a closed magnetic circuit core formed of two cores covering the outer periphery of a coil wound around inner coil-cores. A pair of cutout windows are provided at the outer periphery of each of the cores, and joint plates are disposed on the inner bottom surface of one core. Terminal blocks project outwardly therefrom, so that the terminal blocks are adapted to be folded over each other. The end of each lead wire of the coil is guided through the cutout window and sandwiched between the folded terminal blocks, thereby connecting therewith.

Abstract: A dielectric ceramic composition comprises a main component comprising, in percent by weight, 32 to 47% SrTiO.sub.3, 26.5 to 46% PbTiO.sub.3, 8 to 16% CaTiO.sub.3, 5 to 16% Bi.sub.2 O.sub.3, and 3 to 10% TiO.sub.2 ; ZnO in an amount of 1 to 3.8% of the total composition; and SiO.sub.2 in an amount of 1 to 3.8% of the total composition. The dielectric ceramic composition having a high dielectric constant, a small voltage dependence of dielectric properties, and a low firing temperature.

Abstract: A carbon resistive paste comprising an electrically conductive component, such as carbon; an inorganic filler, such as silica; a resin component, such as an epoxy resin; a solvent, such as ethanol and; if necessary, an organic filler, wherein the inorganic filler is treated with a silane coupling agent, such as .gamma.-glycidoxypropyltrimethoxy silane. The carbon resistive paste provides a resistive film which has limited changes in resistance value in use and is superior in strength.

Abstract: An improved electrical filter device in which cut-off spaces required in a casing of the electrical filter device are still further reduced than in conventional arrangements, and which is free from unnecessary coupling and capable of being constructed entirely by capacitor coupling for compact size.

Abstract: A present invention is a chip-type inductor comprising a laminated structure (28) of a plurality of magnetic layers (1 to 8) in which linear conductive patterns (9 to 21) extending between the respective magnetic layers are connected successively in a form similar to a coil so as to produce an inductance component. The conductive patterns (12, 14, 16, 18, 20, 11 and 10) formed on the upper surfaces of the magnetic layers and the conductive patterns (9, 13, 15, 17, 19 and 21) formed on the lower surfaces of the magnetic layers are connected with each other in the interfaces of the magnetic layers and are also connected each other via through-holes (22 to 27) formed in the magnetic layers, so that the conductive patterns are continuously connected in a form similar to a coil.

Abstract: A chip-shaped piezoelectric vibration part provided integrally with capacitors and resistances, which is so constructed that a piezoelectric element including a pair of vibrating electrodes is housed in a tubular casing whose openings at both axial ends are covered by respective caps, both vibrating electrodes being connected with the caps corresponding thereto through conductive connecting materials, the tubular casing being provided with either one or both of the capacitor and resistance, so that the part is small-sized as a whole to enable its integration degree for package to be improved and is easy to handle.

Abstract: A process for preparing a particulate ceramic material comprising the steps of:(a) adding carbon dioxide or an aqueous solution of a soluble carbonate to first aqueous solution of a nitrate or chloride of Ba, Sr, Ca or Mg in a first vessel to adjust the pH of said first aqueous solution to between 7 and 10 thereby forming a carbonate precipitate;(b) adding an aqueous solution of a soluble hydroxide to a second aqueous solution of a nitrate or chloride of Ti, Zr, Sn or Pb in a second vessel to adjust the pH of said second aqueous solution to between 7 and 10 thereby forming a hydroxide precipitate;(c) combining slurries containing the precipitates formed in said first and second vessels;(d) mixing the combined slurries;(e) passing the slurries through a filter;(f) washing the filter cake with water;(g) drying the filter cake to form a powder;(h) calcining the dried powder; and(i) grinding the calcined powder.