Showing papers by "Panasonic published in 1983"

Ba(Zn1/3Ta2/3)O3 Ceramics with Low Dielectric Loss at Microwave Frequencies

Abstract: The dielectric properties at microwave frequencies of Ba(Zn1/3Ta2/3)O3 ceramics prepared by sintering were investigated. These ceramics had lower density but higher loss quality than ceramics hot-pressed at 1400°C. Loss quality was greatly improved by prolonged sintering. The Q of the ceramics measured by the dielectric resonator method was 14 000 at 12 GHz. The ceramics were investigated by X-ray diffraction analysis. It was found that Q improvement corresponds with increased Zn and Ta ordered structures in the ceramics.

Organic electrolyte battery

Abstract: The present invention relates to an organic electrolyte battery configured by sealing power generating elements comprising an organic electrolyte by a positive can, a negative can and a gasket, wherein said organic electrolyte includes a lithium salt containing a sulfonic acid group as a solute and at least one selected from a group consisting of sulfolane, 3-methyl sulfolane and Tetraglyme as a solvent. The aim of the invention is to provide an organic electrolyte battery having an excellent discharge performance in a low temperature environment and a superior reliability during long term storage, as well as a high temperature resistance which enables the battery to be mounted onto a substrate according to the Reflow method.

Sanitary washing apparatus

Abstract: When a user sets water power using a water power adjustment switch in a remote control device, a controller controls the period of pressure fluctuations, the width of pressure fluctuations, and the central pressure of the discharge pressure of a pump on the basis of a signal transmitted by radio from the remote control device. When the user sets the divergent angle of washing water using a washing area adjustment switch in the remote control device, the controller controls the divergent angle of the washing water sprayed from a posterior nozzle on the basis of the signal transmitted by radio from the remote control device. Consequently, the washing water supplied to a side surface of a cylindrical swirl chamber from a first flow path in the posterior nozzle is sprayed from a spray hole as dispersed spiral flow, and the washing water supplied to a lower part of the cylindrical swirl chamber from a second flow path in the posterior nozzle is sprayed from the spray hole as linear flow.

Dye transfer sheets for heat-sensitive recording

Abstract: A dye transfer sheet (2) for heat-sensitive recording is described which comprises a substrate (1), and a thin layer (2) of at least one sublimable dye formed on one side ofthe substrate. The dye layer comprises non-sublimable particles (3) uniformly distributed therethrough to form irregularities on the surface.

Life properties of TiMn alloy hydrides and their hydrogen purification effect

Abstract: The effects of pressure-induced absorption-desorption cycling on the degradation properties and the hydrogen purification ability of TiMn alloy hydrides were studied. The lines in the characteristic X-ray diffraction pattern were much broader and weaker in the cycled alloys but the C14 hexagonal structure was maintained and no second phase was observed. The hydrogen capacity was reduced by 30% for TiMn binary alloy and by 20% for TiMn multicomponent alloys after about 10 000 cycles in contrast with the marked reduction observed for LaNi5. In some cases slight recovery could be produced by heating at 500 °C for 1 h in a vacuum after cycling. Gas chromatography measurements on hydrogen released from TiMn1.5 hydride showed that the hydrogen purity was better than 99.9999% (except for an H2O impurity) after a purge release of only a few per cent of hydrogen when the purity of the commercial grade hydrogen absorbed by the hydride was 99.99%. It can be concluded from the results of these measurements that hydrogen purification using TiMn alloy is related to two factors. The removal of N2, CO and CO2 proceeds by surface poisoning (i.e. oxidation, physisorption or chemisorption), whereas the removal of CH4, O2, H2O and Ar is controlled by surface poisoning and concentration. The hydrogen purification effect of TiMn alloy hydrides showed little degradation even after a large number of absorption-desorption cycles.

Hand-held electric tool

Abstract: A hand-held electric tool comprising an elongated housing having a first longitudinal axis and provided with a motor-driven chuck projecting from the forward end thereof, an elongated grip having a second longitudinal axis and connected at its forward end to the rearward end of the housing. An electric motor is positioned within the housing for rotatably driving a suitable bit held in the chuck to perform fastening or drilling operation. The grip is connected to the housing in such a way as to be selectively switched between two positions, that is, a straight position where the first and second longitudinal axes are in alignment and an angled position where the first axis crosses the second axis. In the preferred embodiment, the grip and the housing are pivotally interconnected at a pivot axis to permit the grip to swing about the pivot axis between the straight and angled positions.

Rotary head assembly

Abstract: In a rotary head assembly which has a stationary cylinder (21) with a fixed cylindrical part, and a rotatable rotary member (19) of a diameter substantially equal to that of the cylinder (21) which is arranged with a very small gap on the same shaft as the cylinder (21) and holds a magnetic head (29) so that a magnetic tape is helically wound and fed thereon, a pump-out type of spiral group (20) is formed on part or all of the periphery of either of the surfaces of the opposed rotary unit formed between the cylinder (21) and the rotary member (19), a floating force due to pneumatic pressure is generated, not only on the rotary cylinder, but also on the stationary cylinder so that the feeding of the magnetic tape is stable and smooth, thereby basically eliminating the phenomena of tape flutter and adhesion, and also tape damage or cylinder wear due to friction

Electroosmotic ink printer

Abstract: An electroosmotic ink printer comprising a head having an array of recording electrodes successively arranged to define a print line along one edge of the head. A common electrode is provided in spaced overlying relation with the recording electrodes. Between the electrode array and the common electrode is a means for electroosmotically moving ink in a direction toward the print line and in an opposite direction depending on an electrical potential applied to the recording electrodes with respect to the common electrode. A memory stores a video input signal in a plurality of storage locations corresponding to the recording electrodes for delivery in parallel form to a modulator for generating individual recording signals corresponding to the recording electrodes. Control means activates first and second groups of the recording electrodes by successively applying the individual recording signals thereto to cause the ink to move to the print line and deactivates the remainder of the recording electrodes by successively applying a deactivating potential to the electrodes of the group other than those to which the recording signals are applied.

Dynamic pressure type fluid bearing device

Abstract: A dynamic pressure type fluid bearing device including a housing having a bearing hole, a shaft rotatably provided in this bearing hole, and a thrust bearing member attached to an end of the housing, wherein a groove is provided in either the shaft or the bearing hole, another groove is provided in the contacting surface between the thrust bearing member and the shaft, a ventilation flute to communicate with the atmosphere is provided in the contacting surface between the thrust bearing member and the housing, and a lubricant is charged around the groove, so that the lubricant is prevented from flowing out due to changes in the atmospheric pressure or environment.

Atomizing apparatus employing a capacitive piezoelectric transducer

Abstract: An atomizing apparatus comprises a body having a chamber into which liquid is supplied. A nozzle member is secured to the body to define a front vibrating member of said of the chamber, the nozzle member having at least one nozzle opening. A capacitive piezoelectric transducer is secured to the nozzle member for producing pressure rises in the liquid to cause the portion of the liquid in proximity to the nozzle opening to be ejected therethrough to the outside. The piezoelectric transducer is connected to an inductance element to form a resonant circuit. An amplifier is connected with the resonant circuit to form a self-oscillating loop to amplify the signal in the loop to sustain oscillation at a frequency variable as a function of the temperature-dependent capacitance of the piezoelectric transducer.

A Capacitance Investigation of InGaAs/InP Isotype Heterojunction

Abstract: We have measured deep levels near the InGaAs/InP heterointerface by DLTS and C-V method. Three deep levels, E1, E2 and E3, have been found near the heterointerface, whose activation energies are 0.17 eV, 0.37 eV and 0.54 eV, respectively. The concentrations of E2 and E3 rapidly decrease when approaching the heterointerface from the InP, indicating that the two levels are located only in the InP substrate. The E1 level, on the other hand, can be found only near the heterointerface. The density of the E1 level is well correlated with the interface charge density which is determined by the C-V analysis. Both of the densities are dependent on the degree of the lattice mismatch between the InGaAs epitaxial layer and the InP substrate.

Optical and reversible recording and reproducing apparatus

Abstract: This invention relates to an optical and reversible recording and reproducing apparatus and intends to provide a practical apparatus in which information signals can be recorded, reproduced and erased by irradiating a laser beam and the like on the substrate to be optically recorded. More practically, there is provided such an apparatus wherein two light sources such as lasers having different wavelengths are used, and a first almost circular micro-lightspot is produced by one light source, while a second elliptic lightspot having a longitudinal diameter in the tangential direction of a guide track on a disc is produced by the other light source. These first and second lightspots are closely irradiated on the same guid track of an optical recording disc. The recording and reproducing of the signals are performed using the first lightspot while the erasion of the recorded signals can be made by using the second lightspot or cooperatively using the first and second lightspots.

Battery powered portable saw

Abstract: A portable electric circular saw which operates on a rechargeable battery is disclosed. The circular saw comprises a housing for accommodating a motor driving a circular saw blade operatively connected thereto, the rechargeable battery supplying electricity to the motor, and a handle projecting atop the housing, the motor having an output shaft arranged transversely of the housing and connected to a drive spindle carrying the saw blade and arranged in parallel relationship with the output shaft. The motor and the battery are disposed within the housing, to be arranged along the cutting direction of the saw blade, so as to properly distribute the weight of the saw in the longitudinal direction, which is the cutting direction of the saw blade. The handle is of generally U-shaped configuration, having an elongated top grip and legs at opposed ends, which join the top of the housing at respective portions upwardly of the motor and the battery, with the top grip extended longitudinally along the cutting direction of the saw blade, such as to provide a properly balanced saw structure, which effectuates easy hand operation to advance the saw.

Ultrasonic liquid ejecting unit and method for making same

Abstract: An ultrasonic liquid ejecting unit comprises a piezoelectric transducer coated with a conductive film on each of its front and rear surfaces, a nozzle plate secured to the transducer to form a bimorph vibration system and a body having a liquid chamber defined by the nozzle plate in pressure transmitting relation with the liquid in the chamber. The nozzle plate is coated on each of its front and rear surfaces with a pattern of adjoining regions of cement-active and cement-inactive properties. The cement-active region on the front surface conforms to the rear surface of the transducer and the cement-active region of the rear surface conforms to a contact surface of the body. When fabricating the unit, a cementing material in liquid phase, such as molten solder, is applied to each surface of the nozzle plate to exclusively wet the cement-active regions prior to contacting the nozzle plate to the transducer and to the body.

Optical recording and reproducing head

Abstract: A light beam emitted from a semiconductor laser passes through optical elements which include a condenser lens, a magnifier prism, and a focussing lens to obtain a substantially circular spot of light on a disc. The magnifier prism is constructed such that only the narrower cross-section of the elliptical light beam emitted from the condenser lens is magnified by the incidence surface of the magnifier prism to obtain a substantially circular light beam. The light beam thus obtained is reflected by the prism so that it becomes substantially perpendicular to the beam emitted from the condenser lens. After reflection by the disc, the light passes through a splitter prism. The splitter prism has a reflecting surface and a transmitting surface which spatially bisect the light beam reflected from the disc, a lens and other components. The bisected portions of the beam fall on a photodetector for focussing control and a photodetector for tracking control.

Process of vapor phase epitaxy of compound semiconductors

Abstract: A layer of a compound semiconductor having good quality is formed by disposing a substrate in an epitaxial growth layer, feeding a second reactant gas through a guide member extending from the downstream side to the upstream side of the flow of a first reactant gas, mixing the first reactant gas and second reactant gas, and supplying the resultant gaseous mixture of the first and second reactant gases onto the substrate.

Semiconductor integrated circuit device

Abstract: PURPOSE:To obtain an IC in small area which can be driven at a high speed with a low power consumption by connecting in common the sources of Schottky junction gate type MESFETs to a current source and by connecting two output terminals of the circuits providing loads to the drain to the gates of a pair of MESFETs cascade- connected respectively CONSTITUTION:The sources of MESFETs Q21, Q22 are connected in common and also connected to a current source 26, FETs Q23 and Q24 are cascade-connected, and a buffer power supply voltage is supplied 27 to the source of FETQ24 When a signal of the terminal 24 is ''H'' level, FETQ24 is ON and therefore an output terminal rapidly becomes ''L'' level When the terminal 24 is ''L'' level, the ON current of FETQ23 is supplied and thereby a load connected to the terminal 25 is rapidly charged and becomes ''H'' level Since the FETs Q23 and Q24 turn ON and OFF complementarily, a power is little supplied even when a low impedance capacitive load is connected to the terminal 25 under the steady state and only a current increases during the transient time in the switching condition Accordingly, a capacitive load can be driven with a low power consumption Moreover, since an ON current of the FETs Q23, Q24 becomes a load drive current, the width of gate of the FETs Q23, Q24 can be narrowed and occupied area of circuit can also be narrowed

Double superheterodyne tuner

Abstract: In a double superheterodyne tuner, the first local oscillator frequency is set to a value higher than the first intermediate frequency, which is set to a value between three and five times the upper limit of the receiving frequency range. With this arrangement spurious signals of at least third or less order can be prevented from occuring in the first intermediate frequency range. The tuner comprises an input filter which attenuates interference signals whose harmonics equal a desired frequency. The second intermediate frequency may be selected such that it is obtained by subtracting the second local oscillator frequency from the first intermediate frequency which is higher than the second local oscillator frequency. As a bandpass filter for passing the first intermediate frequency may be used a coaxial dielectric filter so as to reduce interferences by undesired channel signals.

Resonant type constant voltage supply apparatus

Abstract: A resonant type constant voltage supply apparatus has a LC series resonance circuit. Energy stored in both a resonance capacitor and a resonance inductor is directly transferred to the output or input terminal of the apparatus. A control transformer is provided in parallel with the resonance capacitor for deriving the energy stored in the resonance capacitor. The amount of the energy stored in the resonance capacitor can be controlled by changing the switching frequency of the apparatus or the inductance of the control transformer, so as to thereby control the amount of energy transferred to the output or input terminal of the apparatus and thereby stabilize the output voltage of the apparatus.

Flow direction controller

Abstract: A flow direction controller mounted on the outlet of an air conditioner or the like and adapted to control the blowing direction of the air. The flow direction controller is composed mainly of two flow-attaching walls and a control blade rotatable on a shaft. The control blades has two surfaces each producing a flow biasing effect and a curved surface. With this arrangement, it is possible to deflect the flow of blowing air over a wide angular range and also to realize a split-flow blowing without being accompanied by a substantial reduction in the air flow rate, by making efficient use of the attachment of the flow components to the attaching walls and the curved surface.

Temperature and wear sensor for a brake

Abstract: A temperature and wear sensor for a brake is fixed disposed in a brake cylinder, and the sensor has a slider to be pressed on the side face of a piston of the brake cylinder and a temperature sensing device; thereby wear out of brake lining and overheating of the brake fluid are detected through a pair of lead out wires, and the sensor can be used permanently.

Pure green light emitting diodes and method of manufacturing the same

Abstract: OF THE DISCLOSURE Pure-green light emitting diodes comprise an n-type GaP layer formed on an n-type GaP substrate and a p-type GaP layer formed by using a liquid phase epi-taxial method, the average donor concentration of the p-type GaP layer being less than or equal to 5 x 1016 cm-3. Liquid phase crystal growth of the above p-type GaP layer is realized by applying a method of keeping the melt used for the liquid phase crystal growth of the n-type GaP layer at a constant temperature and the ambient atmosphere at a reduced pressure for a pre-scribed period of time thereby to volatilize donor impurities from the melt and to compensate the donor impurities. Pure-green light emitting diodes easily distinguishable from yellow-green and having high brightness can be manufactured by applying the over-compensation method which is suitable for mass produc-tion.

Radio-wave sealing device.

Abstract: A radio-wave sealing device has a choke unit provided in a leakage wave transmission path of equipment generating high-frequency electromagnetic waves. The choke unit has a gutter wall (29) corresponding to a ground conductor, a large number of strip conductors (30) positioned with a width of a at a pitch P, and a gutter base (31 to reduce the propagation of radio waves in the longitudinal direction of the gutter. In addition, since the characteristic impedance of part of the choke varies in a zone shorter than λ/4 of the frequency being used, the depth and width of the gutter can be reduced to less than λ/4.

Brushless linear servomotor

Abstract: A brushless linear servomotor utilizes a first member provided with magnetic teeth having a large number of teeth-salients and slots arranged lengthwise of the first member at regular pitches and a second member which is moveable along the first member and has at least one magnetic core with magnetic teeth groups engraved thereon at surfaces opposite to the first member, and having a coil wound around each of the magnetic cores and further having a guide arranged to keep a constant gap between the first and second members A number of non-contact detectors are connected to the second member so as to detect the salients and slots of the magnetic teeth of the first member An electronic commutator and an electronic scale circuit are both connected to the non-contact detectors The electronic scale means generates signals indicative of the relative position of the two members and a motor driving circuit is connected to each of the coils and the electronic commutator so as to operate the motor in response to the electronic commutator

Method of making a gallium nitride light-emitting diode

Abstract: The substrate of a gallium nitride light-emitting diode is made rough at given positions on the surface thereof, or an insulating film strip pattern is attached on the surface of the substrate prior to growing an n-type conductive gallium nitride layer and a semi-insulating gallium nitride layer thereon. As a result, high conductivity regions are formed in the semi-insulating layer at positions corresponding to the rough surfaces or the insulating film strip pattern in such a manner that each of the high conductivity region extends from the n-type conductive layer to the upper surface of the semi-insulating layer so as to function as a conductor to be connected to an electrode. In the same manner similar high conductive regions are made along kerf portions in a diode wafer, preventing each diode chip from being damaged on cutting.

Fiber optic magnetic field sensor

Abstract: A fiber optic magnetic field sensor employing Faraday effect. The sensor has two pieces of birefringent substance interposed between the ends of optical fibers and a rod lens for effecting polarization separation. In addition, the sensor employs a reflex optical system in which light reciprocates through a Faraday material. Thereby, a magnetic field sensor has been realized which is more compact and lightweight and lower in cost as well as more accurate.