Abstract: A device for detecting positioning marks for cutting a ceramic laminated body having a plurality of inner electrodes formed therein and having a plurality of positioning marks for cutting so formed on its outer side surfaces as to have a predetermined positional relationship with the inner electrodes, which comprises a device for detecting image information obtained from the outer side surfaces of the ceramic laminated body, a binary-coding device for binary-coding the image information detected by the detecting device based on a color density, an image memory for storing the image information binary-coded by the binary-coding device, a characteristic extractor for extracting signal regions having a color density not less than a predetermined color density from the image information stored in the image memory, removing regions having an area not more than a predetermined area and regions having a length in the lateral direction not less than a predetermined length out of the signal regions extracted, and sele

Abstract: A method of driving a piezoelectric bimorph device in which first and second piezoelectric ceramic layers are so electrically connected to each other as to expand or contract in the opposite directions, which is characterized in that when t.sub.1 is taken as the thickness of one of the first and second piezoelectric ceramic layers, Ec is taken as the coercive field strength of a piezoelectric material constituting the piezoelectric ceramic layer, and V.sub.1 is taken as the minimum value of the produce Ec.times.t.sub.1 =Vc.sub.1, and t.sub.2 is taken as the thickness of the other piezoelectric ceramic layer, Ec is taken as the coercive field strength Ec of a piezoelectric material constituting the piezoelectric ceramic layer, and V.sub.2 is taken as the minimum value of the produce Ec.times.t.sub.2 =Vc.sub.2, a voltage of not less than (V.sub.1 +V.sub.2) is applied to said piezoelectric bimorph device.

Abstract: A radio frequency signal combining/sorting apparatus which includes a plurality of channel filters which allow band regions of respective transmission channels to pass through them, isolators connected to respective inputs of the channel filters, a plurality of sets of power composing circuits each including branch lines for composing outputs of the channel filters into one output, and hybrid circuits arranged to each compose the outputs per two sets of the power composing circuits. The band regions to be applied to the respective channel filters are selected in such relation that the band regions of the respective channel filters corresponding to a given power composing circuit are spaced from each other to the largest possible extent.

Abstract: In a trimmer capacitor comprising a stator having a stator electrode, a rotor having a rotor electrode and a shaft holding the rotor in a rotatable manner with respect to the stator, the stator is formed of resin containing a dielectric ceramic material. The stator electrode is located in the interior of the stator, so that the stator electrode is opposed to the rotor electrode through a dielectric layer which is defined by an integral part of the stator. The stator, the stator electrode and the dielectric member which are required for the trimmer capacitor are entirely integrated with each other in the stator, whereby the trimmer capacitor can be easily assembled. The resin, containing the dielectric ceramic material, forming the dielectric layer is superior in shock resistance to a ceramic material, whereby no problem of cracking etc. occurs even if the thickness of the dielectric layer is reduced.

Abstract: A voltage controlled oscillator having a resonator wherein a substrate is made up of a plurality of dielectric layers; an inductor functioning conductive film and grounding electrode films are each formed at a boundary surface of one of the dielectric layers; the earth electrode films are arranged, in the direction in which the dielectric layers are laminated, at both sides of the conductor functioning conductive film; the inductor functioning conductive film and the grounding electrode films constitute the resonator; and electric lands are formed on the surface of the substrate so that other components of the oscillator are mounted on the surface of the substrate.

Abstract: A stacked electric double layer capacitor including a peripheral portion of an intermediate electrode plate held between peripheral portions of first and second case halves to be welded to each other, thereby defining first and second closed spaces for storing first and second capacitor elements, respectively. The first and second electrode plates are exposed by openings provided in the first and second case halves to form external terminal means, respectively. The two capacitor elements, stacked in series with each other are stored in the case, formed by joining the case halves to form a stacked electric double layer capacitor which can be reduced in thickness with substantially no leakage of electrolyte.

Abstract: In order to manufacture a ceramic layered product for manufacturing a multilayer ceramic capacitor, a plurality of reels (23) are prepared, which are wound with a plurality of types of elongated mother ceramic sheets (12), each having a plurality of electrode patterns (14) and a plurality of registration marks (15) distributed along its longitudinal direction. The mother ceramic sheets (12) are drawn out from the respective reels (23) onto related sheet cutting stages. Regions including the electrode patterns (14) are punched from respective ones of the mother ceramic sheets (12) provided on a selected sheet cutting stage (25) by a cutting head (52) whose periphery is enclosed with a cutting edge (51) on the basis of the registration marks. Then the ceramic sheets (35) punched out from the mother sheet by the cutting head (52) are carried to a stacking jig (34) by the cutting head (52) and stacked with each other on the stacking jig (34).

Abstract: Two surface acoustic wave resonators are transversely formed with a minute spacing between them on a piezoelectric substrate. Said two surface acoustic wave resonators are oppositely formed to each other to become line-symmetry. Each of the surface acoustic wave resonator comprises an interdigital transducer and reflectors formed on its both sides. An input terminal and an output terminal are lead from the corresponding interdigital transducer. Between the input and the output terminals, an electrostatic capacity is bridged. The electrostatic capacity is formed on, for example, a piezoelectric substrate. In this case, the electrostatic capacity may be formed by alternately interdigitating each part of comb-like electrodes of the two interdigital transducers. Furthermore, the electrostatic capacity may be formed by alternately interdigitating both parts of the two reflector electrodes.

Abstract: A detecting circuit according to the present invention is for detecting output of a vibrating gyroscope including a prism-shaped vibrator and piezoelectric elements formed on, at least, two side faces of the vibrator. The detecting circuit comprises an exciting signal generating circuit for exciting the vibrator by inputting the signal to the two piezoelectric elements of the vibrating gyroscope. The vibrating gyroscope bends and vibrates in response to the signal from the exciting signal generating circuit. A difference between the outputs of the two piezoelectric elements of the vibrating gyroscope is detected by a differential circuit. The output signal from the differential circuit is subjected to synchronous detection by a synchronous detecting circuit. Furthermore, when necessary, a phase adjusting circuit for adjusting phase of the output signal from the differential circuit is connected to the synchronous detecting circuit.

Abstract: A dielectric ceramic composition containing 0.3 to 5.0 parts by weight of an additive composed of at least one of SiO.sub.2, Li.sub.2 O and B.sub.2 O.sub.3 per 100 parts by weight of a main component expressed by the following composition formula:(1-x-y-z-t)BaTiO.sub.3 +xCaZrO.sub.3 +yMgO+zMnO+tRe.sub.2 O.sub.3,wherex.ltoreq.0.060.005.ltoreq.y.ltoreq.0.080.005.ltoreq.z.ltoreq.0.020.005.ltoreq.t.ltoreq.0.02.In the composition formula, Re indicates at least one of Y, Gd, Dy, Ho, Er and Yb.

Abstract: A PTC thermistor has its substrate entirely coated with an insulating glass material except for the area where a silver electrode is formed. Such a thermistor may be produced by coating a substrate with an insulating glass material, forming a silver layer on the coated substrate and fusing the silver layer with a part of the glass material so as to form an electrode adhering to the substrate. An underelectrode may be provided between the substrate and such an electrode. A resistor is formed by encasing such a PTC thermistor with a pair of spring terminals for supporting the thermistor therebetween.

Abstract: A non-reduction type dielectric ceramic composition, which contains 100 parts by weight of (Ca.sub.1-x Sr.sub.x).sub.m (Zr.sub.1-y Ti.sub.y)O.sub.3 -zMnO.sub.2 -wSiO.sub.2 serving as a main component and 2 to 30 parts by weight of an additive which is a(LiO.sub.1.kappa. -RO)-(1-a)(BO.sub.3/2 -SiO.sub.2), where RO is at least one type of SrO, BaO and CaO, and a is not less than 0.01 nor more than 0.8 in terms of a molar ratio, and satisfies the following relationships in the composition formulas of the above described main component and additive: x, y and m satisfy the following relationships in terms of a molar ratio:x.ltoreq.x.ltoreq.1.00.ltoreq.y.ltoreq.0.20.9.ltoreq.m.ltoreq.1.1and z and w satisfy the following relationships when the amount of (Ca.sub.1-x Sr.sub.x).sub.m (Zr.sub.1-y Ti.sub.y)O.sub.3 is 100% by weight:0.1.ltoreq.z.ltoreq.5% by weight0.3.ltoreq.w.ltoreq.8% byw weight.

Abstract: A band-pass filter which includes a plurality of dielectric coaxial resonators which are arranged in a parallel relation and extending axially in the same direction, and have respective coupling terminals inserted therein, and a dielectric substrate formed, on its first surface, with a plurality of coupling electrodes for connecting the respective coupling terminals. The coupling electrodes on the first surface of the dielectric substrate have an inductance element between them for connecting at least two coupling electrodes to each other. Confronting electrodes facing the coupling electrodes are formed on the other surface of the dielectric substrate to from a capacitance bypass circuit. The inductance element may be a printed circuit on the dielectric substrate or an air-core coil. The air-core coil may be located either adjacent the first surface of the substrate, or away from the substrate between the resonators.

Abstract: A nonreducing dielectric ceramic composition. A main component includes oxides of Ba, Ca, Mg, Sr, Ce, Ti and Zr, and in the general formula represented by (Ba.sub.l-m-n-o Sr.sub.l Ca.sub.m Mg.sub.n Ce.sub.o).sub.q (Ti.sub.1-p Zr.sub.p)O.sub.3. In this formula l, m, n, o, p and q satisfy the relationships, 0.05.ltoreq.l.ltoreq.0.30, 0.005.ltoreq.m.ltoreq.0.22, 0.0005.ltoreq.n.ltoreq.0.05, 0.0005.ltoreq.o.ltoreq.0.02, 0.ltoreq.p.ltoreq.0.20, 1.002.ltoreq.q.ltoreq.l.03. The composition includes between 0.02 to 2.0 mole % of one or more of the following oxides MnO.sub.2, Fe.sub.2 O.sub.3, Cr.sub.2 O.sub.3 and CoO.

Abstract: A temperature sensor includes a ceramic layered product having a multilayer structure formed of a plurality of ceramic sheets containing an unreducible ceramic material, a plurality of resistive patterns, containing copper or nickel, formed on major surfaces of the plurality of ceramic sheets respectively, a conductive path passing through the ceramic sheets for series-connecting the plurality of resistive patterns with each other, and respective terminals connected to both ends of the series-connected plurality of resistive patterns.

Abstract: A resistance film of platinum is formed on an insulating substrate of alumina. The resistance film is divided by grooves passing therethrough to provide a zigzag resistance circuit pattern, and the film forms a pair of terminal electrodes electrically connected to end portions of the resistance circuit pattern, respectively. In order to stop transmission of heat generated in the resistance circuit pattern to the terminal electrodes, gaps for stopping heat conduction are formed between the resistance circuit pattern and each of the terminal electrodes.

Abstract: A process of forming an LC composite part. The process includes the steps of: forming a substrate having a capacitor section by laminating ceramic sheets having a plurality of capacitor electrodes formed thereon such that the ceramic sheets and electrode layers alternate, sintering the substrate, forming a plurality of coil sections on the sintered substrate, cutting the substrate into composite parts, and electrically connecting the capacitor electrode layers with the coil section.

Abstract: A piezoelectric resonator which comprises a piezoelectric resonance element in which electrodes are formed on a pair of side surfaces, which are opposed to each other, of a piezoelectric substrate. The electrodes are opposed to each other while being separated by the piezoelectric substrate in the center of the piezoelectric substrate to form a vibrating portion of an energy-trapped type utilizing a thickness shear vibration mode in the center of the piezoelectric substrate. Spacers are respectively fixed to the side surfaces of the piezoelectric substrate with gaps being provided between the spacers and the above-mentioned vibrating portion, and a pair of cover sheets are respectively affixed to both major surfaces of a structure comprising the spacers and the piezoelectric resonance element so as to form gaps on top of and beneath the vibrating portion in the piezoelectric resonance element.

Abstract: This magnetostatic wave device includes a ferrimagnetic substrate like, for example, a YIG thin film. On this ferrimagnetic substrate a strip line is formed. One end of the strip line is connected to an input terminal and the other end is connented to an output terminal. A magnetic field is applied to the ferrimagnetic substrate by a magnet. In this case, the ferrimagnetic substrate is so disposed that a direction parallel to its principal plane and a direction perpendicular to its principal plane are not parallel to the direction of a line of magnetic force of the magnet.

Abstract: A delay line device for delaying signal transmission, comprising a dielectric layer, a grounding electrode layer disposed on one surface of the dielectric layer, a strip line conductor layer disposed on the other surface of the dielectric layer, an input terminal and an output terminal respectively connected to the strip line conductor layer at two positions, and a delay time adjusting electrode connected to at least one of the input and output terminals, a capacitance of which influences a delay time being obtained between the delay time adjusting electrode and the grounding electrode layer. The capacitance of the delay time adjusting electrode is adjustable, thereby permitting adjustment of the delay time.