Showing papers by "Panasonic published in 1984"

Finned heat exchanger

Abstract: A finned heat exchanger includes a plurality of elongated fins which are arranged at a predetermined interval in parallel with one another such that air flows between neighboring ones of the fins in a predetermined direction. A plurality of heat transfer tubes which contain refrigerant passing therethrough are orthogonally inserted through the fins so as to be arranged in a plurality of columns on the fins. When the finned heat exchanger is operated for condensation, the heat transfer tubes are provided in two paths in the vicinity of an inlet for the refrigerant and are provided in one path in the vicinity of an outlet for the refrigerant, such that the heat transfer tubes of the one path occupy about 5 to 30% of all the heat transfer tubes.

tricolor fluorescent lamp

Abstract: A tricolor fluorescent lamp operating on a DC power source is disclosed herein. The lamp comprises an outer envelop defining therein a sealed space in which an ionizable medium is filled at low pressure. Disposed within said outer envelop are three tubular envelops of a generally inverted U-shaped configuration which define correspondingly three separate discharge paths and which are coated with respective fluorescent substances emitting different colors. Three sequentially energized anodes are located within the sealed ends of the respective envelops and a common cathode is disposed in adjacently facing relation with the open ends of the envelops, such that the three envelops can be sequentially energized to emit the specific colors which are additively mixed in various proportions to produce a desired color as emitting from the whole lamp. Said U-shaped configuration of the tubular envelops emitting different colors results in the elongated discharge paths or increased light emitting surfaces within a limited space, providing a compact arrangement of the tricolor lamp to be well suitable for decorative illumination. Also, the bent portions of the U-shaped envelops are cooperative to provide a viewing surface on which all three color emitting sources can appear, which renders the tricolor lamp to be well adaptable for use as a picture element in a color display. Further, the sequential shifting of the discharge paths allows the common cathode to be constantly energized, preventing irregular color reproduction which would otherwise result from the interruption in energizing the cathode during the course of changing the colors to be emitted from the lamp.

Piezoelectric ultrasonic transducers having acoustic impedance-matching layers

Abstract: Ultrasonic transducers comprising an ultrasonic transducer element, a pair of electrodes provided on opposite sides of the element, and an acoustic impedance-matching layer formed on an ultrasonic wave-radiating surface of the element through one electrode. The acoustic impedance-matching layer is made of a porous polymer film or a composite material comprising thermally expanded resin microspheres dispersed in a cured product of thermosetting resin and has an acoustic impedance not larger than 0.6×10 6 Ns/m 3 . Two-layer constructions may also be used as the acoustic impedance-matching layer.

Aluminum electrolytic capacitor and a manufacturing method therefor

Abstract: An aluminum electrolytic capacitor provided in a container including a resin casing integral with a pair of terminals perforating therethrough and a resin lid coupled to the resin casing with an element which includes an anode aluminum foil, a cathode aluminum foil and separators, which are superposed in layers, so that the anode aluminum foil and one of the terminals are connected electrically through a lead, the cathode aluminum foil and the other lead are connected similarly through another lead, and an electrolyte is impregnated into the separators, thereby obtaining the aluminum electrolytic capacitor which is well sealed, is very heat resistant and will not short circuit.

Ultrasonic probe having dual-motion transducer

Abstract: In a mechanically scanned ultrasonic probe, an ultrasonic transducer (4) is swingably mounted on a drive shaft (9,9a,9b; 46; 64,67; 85) which is given a swinging transversal movement and a reciprocating longitudinal movement. The transducer emits an acoustic beam which is steered in a raster format in response to the swing and reciprocating motions. Echos returning from objects contain diagnostic data of a three-dimensional space. All the components are encased in a toothbrush-like housing having a head portion (3a), an intermediate portion (3b) and a hand-grip portion (2). The dual motions are provided by a drive mechanism accommodated in the hand-grip portion and the transducer is accommodated in the head portion. The drive shaft extends through the intermediate portion.

Coaxial cable connector

Abstract: OF THE DISCLOSURE A coaxial cable connector of which body has, on one surface, a receptacle including first and second terminal members for electric connection thereto of an end plug ova coaxial cable and, on other surfaces, means for mounting the connector, in common, to a generally used mounting frame for house wiring modules, to be contributive to simplification of house wiring works and prevention of any deterioration of the electric connection.

Vertical magnetic recording medium

Abstract: A vertical magnetic recording medium comprises a non-magnetic substrate, a permalloy film consisting of plural permalloy layers separated by at least one non-magnetic layer placed therein, each of said plurality of permalloy layers being 2000 Å or less thick, and a Co-Cr vertical magnetization film formed on the permalloy film directly or through another non-magnetic layer.

Sealed storage battery

Abstract: The present invention is a sealed storage battery wherein a plurality of flattened unitary cells formed by sealing a polar plate group in an outer bag made of a sheet or a film of synthetic resin are stacked in a direction thicknesswise thereof and accommodated in a pressurized manner in a casing. By so constructing, the unitary cells can be uniformly applied with pressure with the increased capacity for efficiency for a battery, any possible deviation in the lifetime of the cells can be eliminated, and a highly reliable battery of flat type easy to fabricate, and suitable for use as an electric power source for portable electric appliances can be obtained.

MOS register for selecting among various data inputs

Abstract: In a high speed latching circuit (C) for selectively receiving one or plural slowly changing input data signals and latching them at high speed, one or plural first CMOS FETs (31, 33, 35, 37) and one or plural second CMOS FETs (32, 34, 36, 38) of p-conductivity type are connected in series respectively to form one or plural series connections (31+32, 33+34, 35+36, 37+38), wherein selection signals are given to the gates of the first CMOS FETs, input data signals are given to the gates of the second CMOS FETs and a flip-flop (30+39+41) is driven by selected one of the series connections.

Tuning systems on dielectric substrates

Abstract: A tuning system employs a specific resonant circuit which includes two electrodes confronting each other through a dielectric interposed therebetween. Each of the two electrodes has at least one bent portion to present a lumped-constant inductance and has a desired equivalent electrical length. The two electrodes respectively have common terminals located out of mutually confronting positions so that voltage signals induced by mutual inductance between the electrodes will be opposite in phase so as to thereby produce a parasitic distributed-constant capacitance. The two electrodes form a two-terminal circuit network having a first terminal disposed at a desired position on one of the two electrodes and the common terminals as a second terminal. The first terminal of the resonant circuit is connected to a feedback amplifier, an amplifier, or a mixer so as to form a tuning oscillator, a tuning amplifier or a mixer.

Position coordinate input device

Abstract: A position coordinate input device including an input plate subjected, at a point, to an external force with a finger, etc. so as to input data of coordinates of the point into a computer and the like. The device further includes four elastic support members for supporting the input plate, a pair of two first detectors yielding outputs of temperature characteristics of a first sign and a pair of two second detectors yielding outputs of temperature characteristics of a second sign opposite to the first sign so as to enable accurate detection of the coordinates of the point of application of the external force in a simplified construction.

Portable electric circular saw

Abstract: A portable electric circular saw with a tiltable base plate is disclosed herein The circular saw comprises a housing for accommodating an electric motor, a circular saw blade operatively connected to the motor to be driven thereby, a safety guard connected to the housing for enclosing the portion of the saw blade, the base plate upon which the above parts are mounted and which is adapted to engage upon the surface of a workpiece to be sawed, and a bracket for attaching the base plate to the housing One end portion of the bracket is secured to the housing and the opposite end thereof is pivotally connected to the base plate such that the base plate can pivot about an axis within the plane of the saw blade for adjustment of the angle of the cut The base plate joins the bracket by fastening means at the portion intermediate the ends of the bracket after the base plate is set at a desired angle with respect to the saw blade Thus the base plate is linked through the bracket to the housing itself and is not required to be connected to the safety guard, which eliminates the necessity of giving a greater strength to the safety guard enough to be securely connected at its front end to the base plate Accordingly, the safety guard can be made of lightweight material free from the strength requirement such that the overall weight of the circular saw can be reduced so as to be easily manipulated

Objective lens driving apparatus for optical disc player

Abstract: Disclosed is an objective lens driving apparatus having a holder 9 holding an objective lens 1 and connected to a base 17 through at least four linear members 13, such that the holder 9 can be moved both in the focussing direction and in the tracking direction orthogonal to the focussing direction through the flexing of the linear members 13. Undesirable local resonance can be suppressed due to the use of the linear members 13 in support of the holder 9.

Columnar structure and some properties of metal-evaporated tape

Abstract: Metal Evaporated Video Tape (ME Tape) has been developed for highly competitive and innovative mass-produced VTRs. A magnetic recording layer of Co-Ni film of 0.15 μm was prepared by vacuum roll coating technology in an oxygen atmosphere using polyester substrate. The shape of the columnar grains forming the film is influenced by this deposition system which has a continuously varied incidence and deposition rate. The anisotropic columnar structures and properties of the ME Tape were investigated. The magnetic properties of a series of films made by varying the minimum incident angle were investigated and the results of the magnetic anisotropies and different recording characteristics of different tape transport directions are presented here. On the other hand, the still-frame life and the frictional behavior of ME Tape has shown no anisotropies for tape transport.

Color sheets for thermal transfer printing

Abstract: Color sheets for thermal transfer printing comprise a substrate having a colorant layer on one side of the substrate and a resin layer formed on one side of the substrate and a resin layer formed on the other side of the substrate, the resin layer being made of a resin composition comprising fine particles and a lubricating material dispersed in a binder resin. The resin layer is made rough on the surface there of due to the presence of the fine particles whereby the color sheets do not stick to thermal heads and the resulting images are free of dropout defects and good in quality.

Bedsore preventing apparatus

Abstract: A bedsore preventing apparatus comprises an air mattress having at least two groups of pneumatically expandible and contractible cells respectively communicating with one another in each of the groups, each of said cells in one of the groups being positioned between adjacent ones of the cells in the other group, an air pump for supplying air under a pressure to the cells in each group through each of conduit pipes for the respective groups, and a valve means provided at least in one of the conduit pipes and cyclically actuated for changing over its mode between open and closed modes so that, upon activation of the apparatus, the cells in at least one of the groups sequentially expand and contact to sufficiently change inflation and deflation pattern of the cells of the air mattress for avoiding continuous support at any specific positions of patient's body lying on the mattress and preventing patient's bedsore at such positions.

Flexible heating wire

Abstract: A flexible heating wire includes a first conductive body, a second conductive body, a thermally fusible electrically insulative body which are arranged such that the first and second conductive bodies will be brought into electric contact with each other when the thermally fusible electrically insulative body is thermally fused, a third conductive body, and a heating body having a positive temperature coefficient and held in electric contact with at least one of the first and second conductive bodies and the third conductive body. The flexible heating wire is capable of self-controlling the temperature of the heated heating body. The flexible heating wire can detect the danger of localized overheating, abnormal overheating, or the generation of an arc which is caused when the heating wire is subjected to external oppression, bending, or twisting, or when the heating wire is heated by an external source, or when a conductive material has been mixed in the PTC heating body. Through such detection, the flexible heating wire is prevented from being overheated beyond a certain temperature setting. The flexible heating wire will not be heated up to a high temperature after use over a prolonged period of time. Therefore, the flexible heating wire has a sufficient degree of safety.

Apparatus for speech recognition

Abstract: Apparatus for speech recognition recognizes input speech by discriminating phonemes included in an input speech signal such that a fundamental unit for recognition is each phoneme. The apparatus comprises a standard pattern storing portion for storing phoneme standard patterns of phonemes or phoneme groups; a spectrum analyzing portion for obtaining parameters indicative of the spectrum of an input speech signal; a similarity calculating portion for calculating the degree of similarity between the results from said spectrum analyzing portion and standard patterns from said standard pattern storing portion by using a statistial distance measure; a segmentation portion for effecting segmentation by using time-dependent variation of power information and the results from said similarity calculating portion with said power information being obtained in connection with both a low-frequency range spectrum and a high-frequency range spectrum of said input speech signal; and a phoneme discriminating portion for recognizing phonemes by using the results from said similarity calculating portion.

Optical recording and reproducing apparatus

Abstract: A laser beam in an optical recording and reproducing apparatus is narrowed into a very fine spot beam and is applied to an optical disc so as to induce a thermal change therein, to record or reproduce a signal. A mark (17) provided on an optical disc or a disc jacket is detected in order to judge the recording polarity of the optical disc, and, according to the result of the detection, analog gate switches (23a), (23b) are switched to change the polarity of the recording or reproduction signal to be positive or negative as appropriate. By so doing, it is possible to effect stable recording and reproduction with the same recording and reproducing apparatus, even with optical discs which have different reproduction signal polarities depending on the characteristics of the recording materials employed, such as erasable optical discs and nonerasable optical discs.

Voltage-dependent, non-linear resistor porcelain composition.

Abstract: A voltage-dependent, non-linear resistor porcelain composition, which mainly comprises SrTiO 3 , which contains Nb 2 O 5 and Ta 2 0 5 as agent for making semiconductor properties to reduce the resistance of crystal, and which further contains an oxide of at least one element selected from the group consisting of Ga, Pt, Tl 4 Si, Ti, Li, La, Cu, Y, Cs, Au, Mo, S, Be, Al, Na, K, Ca, Cd, In, Ba, Pb, Eu, Gd, Tb, Tm, Lu, Th, lr, Os, Hf, Ru, Mg, Zr, Sn, Sb, and W and Mn0 2 segregated at grain boundary to make the grain boundary highly resistant. Varistor characteristics are obtained by the highly resistant layer at the grain boundary, and thus conductor characteristics can be obtained between crystal grain-grain boundary-crystal grain. An element exhibiting varistor characteristics and capacitor characteristics by a single element is obtained, which is effective in absorbing abnormal high voltage and removing noises.

Inverter-drive controlling apparatus

Abstract: In a controlling apparatus for a simulated sinusoidal wave of unequal width PWM inverter, wherein PWM signal comprises a data region and a HALT region in each of carrier period timer, the carrier period timer T 0 and data unit timer T 2 are controlled by each other independent digital values by each other independent microcomputers (5, 6) or by use of each other different timers (10, 11), and the data unit timer T 2 is controlled by an output of a power source voltage fluctuation detector (18), thereby to provide a constant voltage-frequency characteristic even at voltage fluctuation.

Floppy disc drive unit

Abstract: In a floppy disc drive unit, the rotational speed of a floppy, a write current fed to a write head, electric characteristic of a signal processing circuit in a read circuit are all controlled so as to set them to values suitable for selected mode corresponding to magnetic recording data density. A switching signal is either manually produced or fed from an external circuit so as to effect switching between normal density mode and high density mode. The floppy disc drive unit according to the present invention is therefore capable of handling floppy discs of different density values.

Apparatus for processing multiple workpieces utilizing a single laser beam source

Abstract: Processing of plural works can be made simultaneously by using divided laser beams which is issued from one large Co2 laser beam source, the dividing being made by one or more rotary chopper mirror(s) comprising reflecting parts and light passing parts, and its ration and pulsive start and stop of laser oscillation are controlled in interrelated manner and by controlling the duty time of the laser oscillation in PWM manner. The distribution of powers of the laser beams divided by the rotary chopper mirrors is desirably selectable, thereby enabling simultaneous processing of plural works under the different processing conditions.

Video camera with a monitor

Abstract: A video camera with a monitor, which is provided integrally on both surfaces or the same one surface of a semiconductor substrate or a substrate having a semiconductor film thereon; an image pickup plate and a display unit in one functioning as the image pickup plate for converting an optical image into an electrical signal and the display unit for converting the electrical signal into a visual image; the camera is provided with an optical system for imaging the optical image on the pickup plate.

Piezoelectric ultrasonic probe using an epoxy resin and iron carbonyl acoustic matching layer

Abstract: An ultrasonic probe for an ultrasonic medical diagnostic apparatus which is composed of a piezoelectric vibrator with electrodes attached onto both surfaces thereof and one or two acoustic matching layers which are provided on the surface of one electrode of the piezoelectric vibrator. One of the acoustic matching layers is made of thermosetting resin such as epoxy resin mixed with magnetic material. A backing load member which is made of ferrite rubber or plastic mixed with tungsten powder is provided on the surface of the other electrode of the piezoelectric vibrator. An acoustic lens which is made of silicone rubber may be disposed on the upper acoustic matching layer. The acoustic matching layers may be formed by pouring the materials, thereby to form the ultrasonic probe without an intermedium of a different kind of material on the piezoelectric vibrator.

Thin-film integrated device

Abstract: An insulating substrate of a thin-film integrated device is provided with thin-film elements, such as a thin-film capacitor, a thin-film field-effect transistor and a thin-film electroluminescence element, which each employ an insulating film (3, 7, 13, 15, 16) as one of the constituent elements thereof. The insulating film is constituted by a sputtered composite oxide film of which tantalum and aluminium are its main components. Since a sputtered composite oxide film has the advantage of a large specific inductivity and dielectric breakdown field strength and a small leakage current, its application to these thin-film elements makes it possible to improve the operating characteristics thereof and improve the overall reliability.