Showing papers by "Panasonic published in 1977"

Thermal printing head

Abstract: A very compact thermal printing head which may be manufactured at low cost is proposed. The thermal printing head integrally comprises a given multiple of heaters formed in an array, and a plurality of semiconductor devices each having at least a plurality of transistors which are respectively connected to heaters and a shift register which transfers an image signal for selectively switching the plurality of transistors. Straight lead wires are used to connect the semiconductor devices and the heaters, and L-shaped or inverted L-shaped lead wires are used to connect the semiconductor devices and a set of multi-layer wiring conductors having terminal mount portions of the head. These straight and L-shaped (or inverted L-shaped) lead wires are respectively supported on electrically insulating flexible films obtained by the TAB (tape automated bonding) method.

Polymeric compositions for manufacture of secondary electron multiplier tubes and method for manufacture thereof

Abstract: Disclosed are polymeric compositions for manufacture of secondary electron multiplier tubes. The polymeric compositions may be provided by combinations of (1) insulating polymers having a high secondary yield, (2) conductive particles such as carbon black, graphite or metal particles which may be granularly dispersed into the insulating polymers and (3) organic semiconductors soluble in and compatible with the insulating polymers and adapted to be molecularly dispersed therein. The organic semiconductors may be organic semiconducting polymers wherein the polymers themselves are conductive.

Circuit board assembly and method of manufacturing the same

Abstract: A circuit board assembly comprising an electrically insulating circuit board of synthetic resin having at least one surface laminated with conductive sheet. An electric and/or electronic element, such as resistor or capacitor, of a type which has no lead wires extending outwardly therefrom for external electric connection, but which is constituted by a substantially cubic body having its opposite ends applied with respective films of electro-conductive material which serve as terminal electrodes, is mounted on the circuit board with the electrodes soldered to the respective conductive sheets through immersion of said circuit board, particularly laminated surface thereof, into the pool of molten solder. The circuit board has at least one aperture formed adjacent the area where the element is to be positioned for releasing bubbles evolved in the pool of the solder.

Reverse osmosis membrane

Abstract: In a reverse osmosis membrane of the structure of Loeb's membrane for use to purify sea-water into plain water, the membrane comprises a skin layer as an active layer and a gel layer to support the skin layer, wherein an improvement of flux, that is the (passing rate of purified water) is achievable by burying a porous sheet, such as plain-woven cloth or non-woven fabric, in the gel layer.

Mos type semiconductor device

Abstract: A MOS type semiconductor device, wherein at least one oblique face is provided on at least a part of a gate electrode which is provided on a principal face of said substrate with a gate insulation film inbetween, and at a specific depth from the oblique face, that is, in parallel with this oblique face, an ion-implanted layer is provided in a manner to obliquely cross the surface of said substrate. In this MOS type semiconductor device the channel is made immediately underneath the surface of the substrate and in the ion-implanted layer, and therefore the channel length is determined by the thickness of the ion-implanted layer. By controlling the thickness of the ion-implanted layer, a short channel length, which is required for improving the operating speed and/or the handling current capability of MOS type semiconductor devices, is obtainable.

Holographic memory with fringe stabilizing compensation for recording medium motion

Abstract: The holographic recording system comprises a pair of aligned first and second Fourier transforming lenses, a holographic beam splitter having a series of random phase illumination holograms at a front focal plane of the first lens and arranged to move in a given direction to successively receive a light beam for deffracting it into a zero-order diffracted beam and a first-order diffracted array of sampled, phase shifted beams, and a mask having a first and second apertures disposed at the Fourier transform plane of the first lens. A page composer having electrooptical transducers is positioned in the second aperture to receive the first-order diffracted array of beams to spatially optically modulate the incident beams in accordance with one of successive groups of binary signals. The zero-order diffracted beam is allowed to pass through the first aperture and the first-order diffracted array of spatially modulated beams are focused by the second lens to produce interference fringes between the wavefronts of zero- and first-order beams on a Fourier transform plane of the second lens on which a recording medium is positioned. The holographic beam splitter and the recording medium are conjugate to each other relative to the lens system and moved in opposite directions at equal speeds in synchronism with the occurrence of each group of binary signals, a series of two-dimensional holograms of the binary information is recorded.

Acoustic diaphragm with polyurethane elastomer coating

Abstract: An acoustic diaphragm has a substrate of either a hard resin film or cloth of an organic material, and at least one side of the substrate is laid with a polyurethane elastomer layer. In the case of a cloth substrate, the cloth is optionally metallized by evaporation deposition of Al or Ti and/or impregnated with a thermosetting resin. The elastomer is a copolymer given by condensation of bifunctional polymeric alcohol and a glycol with a diisocyanate. This diaphragm features a flat response curve at medium to high frequencies on account of its relatively large value for Young's modulus and adequately great internal loss, and accordingly is particularly useful for tweeters.

Method for mounting chip type circuit elements on a printed circuit board and apparatus for performing the same

Abstract: Chip type circuit elements are mounted on adhesive layers provided on predetermined positions of a printed circuit board by pushing up each circuit element stack inserted in a magazine which is vertically held just below the corresponding adhesive layer and which is inserted through a corresponding through-hole defined by a lattice-shaped and horizontally placed magazine guide. This method and apparatus can quickly mount chip type circuit elements on the printed circuit board, and make possible an easy change of the circuit element pattern, without necessitating the use of an NC machine.

Microphone capable of cancelling mechanical generated noise

Abstract: A microphone comprises a pair of electroacoustic transducing high polymer piezoelectric semi cylindrical shaped membranes having a single axis of elongation tangent to the curvature mounted in a housing facing each other. The membranes are electrically series connected to each other with a connection between the facing surfaces thereof and are of prescribed polarizations to generate an output which is substantially twice the voltage developed individually from each membrane when said membranes are caused to flex in opposite directions and substantially zero when said membranes are caused to flex in the same direction.

Device for iontophoretic application of fluoride on tooth

Abstract: In order to electrically apply fluoride by means of iontophoresis on a tooth an intermittent direct current is made to flow through the tooth. More particularly, the intermittent direct current has a waveform whose leading edge immediately rises to a peak and which decreases exponentially in time. As a result electrochemical polarization may be avoided and the ratio of the current conduction time to the repetition period may be increased so that the uptake efficiency of fluoride by the tooth may be considerably improved in a smooth manner without the need of impressing an excessive current on the tooth. Therefore adverse effects on nerve systems may be avoided, a patient under treatment feels no pain and no unpleasant stimulus, and the tooth's substance may be so improved as to be free from dental caries or decay.

Time division multiplex transmission system in which electrical power is transmitted to remote terminals from a central unit simultaneously with address and control signals

Abstract: A time division multiplex transmission system including a central unit and a plurality of terminal units connected through a single pair of bus lines to the central unit. The central unit transmits at least a set of address and control signals sequentially to the respective terminal units and also an electric power required for operating and controlling the respective terminal units at least accompanying the address and control signals. The respective terminal units include a condenser for accumulating the electric power from the central unit so that each terminal unit corresponding to each address signal from the central unit performs any desired operation with the accumulated power and transmits a response signal depending on a result of the operation to the central unit responsive to the control signal.

Printed circuit board

Abstract: A printed circuit board which is an electrically insulative substrate of synthetic resin having at least one pair of spaced electroconductive layers. An electric and/or electronic component, such as resistor or capacitor, of a type which has no lead wires extending outwardly therefrom for external electric connection, but which is constituted by a substantially cubic body having its opposed area applied with respective films or foils of electroconductive material which serve as terminal electrodes, is mounted on the substrate with the terminal electrodes soldered to the respective electroconductive layers. To this end, each of the electroconductive layers has a round portion for connection with the associated terminal electrode of the component. Each round portion has an effective surface area equal to or smaller than any of the terminal electrodes.

Printed circuit board and method for making the same

Abstract: A printed circuit board made by providing on an insulating substrate an adhesive coating comprising a butadiene-based rubber and a phenolic resin finely dispersed therein, etching the surface layer of said coating with an oxidizing agent to expose the microcapsules having phenolic resin shells, which have been formed during the setting of said adhesive coating, and forming a chemically deposited metal layer on said adhesive coating.

Color television camera

Abstract: A color television camera of the phase-split type is disclosed wherein an index signal derived by horizontally scanning an index-generating section, produced at the beginning or end portion of vertical scan for an image pickup tube, is converted to a low-frequency signal by a frequency converter so that a low-frequency index signal in at least one horizontal scan period is written into a memory circuit, and the low-frequency index signal is read out for each horizontal scan to produce a standard color television signal from two color-difference signals. The two color-difference signals are derived by processing a modulated color signal, which has been space-modulated by a stripe filter disposed in front of the image pickup tube, and a low-frequency signal or a brightness signal derived from the image pickup tube.

Means for exhausting vapors from a steam cooker

Abstract: A means provided for exhausting vapors from a cooker for steam cooking rice and/or other foodstuffs contained in a cooking pot wherein the water in the cooker is heated by a heater provided within the main body of the cooker. The means includes a cylindrical member which forms a hole in an inner lid of the cooking pot, which hole communicates with the interior of the cooking pot, an annular wall around said cylindrical member, an annular vapor guide member suspended from the outer lid down between said cylindrical member and annular wall, back flow holes provided in the inner lid at the place inside the guide member, and exhaust openings provided outside the outer lid. The means not only collectively exhausts the vapors to be generated during cooking from the exhaust openings but also prevents liquid from the rice being boiled over.

Measurement of Leaf Temperature by Means of Infrared Thermometer in Connection with Plant Physiological Information

Abstract: The leaf temperature was measured by means of an infrared thermometer, which utilized PbTiO3 pyroelectric infrared detector, in connection with plant physiological information. The infrared thermometer was operated with a band pass filter of 9ƒÊm to 12ƒÊm, in which region the spectral reflectance of leaf is relatively low (less than 1% for tobacco leaf) and the averaged emissibity of leaf estimated by using Weber's method is nearly 1.0. The stability of the infrared thermometer proved to be better than 0.3K in terms of zero drift in a series of continuous operation and its best resolution of temperature was 0.1K. A high sensitive impedance meter was used simultaneously as for the measurement of water content in plants. The leaf temperature response of tobacco

Electrical contact material and method of making the same

Abstract: An electrical contact material comprising silver, bismuth oxide and tin oxide with or without tin metal, wherein the amounts of the bismuth and the tin on the basis of the sum weight of the metals in both the metal component and in the metal oxide component are 1.5 to 6 weight percent and 0.1 to 6 weight percent, respectively. This electrical contact material has high resistance to both welding and arc erosion. An advantageous method of making the electrical contact material comprises preparing a metal alloy composed of all the above metals in the above weight ratio and internally oxidizing the bismuth completely in the alloy after shaping the alloy to a desired electrical contact material shape or after crushing the alloy to scaly flakes.

Electrochromic display apparatus

Abstract: In a container which contains an electrochromic solution, a pair of electrodes, namely an indication electrode and a counter-electrode are disposed and an electric circuit is constituted in a manner such that a D.C. pulse is impressed across the electrodes and thereafter the electrodes are shortcircuited to each other. By means of the shortcircuiting, a color indicating substance formed on the indication electrode by the electrochemical reduction reaction or electrochemical oxidation reaction is reversably dissolved from the indication electrode into the solution so as to erase the indication, and therefore contamination of the indication electrode is less and hence a longer life is achieved in comparison with conventional apparatus where such shortcircuiting is not made and simply an inverse pulse is impressed across the electrodes for erasing.

Catalytic exhaust gas purifying device

Abstract: A catalytic converter for purifying the exhaust gases from an internal combustion engine, wherein a plurality of catalytic layers are arrayed in series and spaced apart by a predetermined distance from each other, and bypass paths are provided in such a way that except for the last catalytic layer, a part of the exhaust gases may bypass each catalytic layer without making contact therewith and may directly flow into the next catalytic layer.

Solid state imaging device

Abstract: A solid state imaging device capable of converting one-dimensional or two-dimensional optical information into an electrical signal is disclosed A signal charge stored in each of a plurality of photo-electric converter elements, which is proportional to the amount of incident light, is read into a corresponding stage of a charge transfer device through a switching transistor under the control of a read control pulse The read control pulse is applied through a clock line of the charge transfer device so that the clock line is used both for read-in and for transfer In this manner, one picture element of the imaging device is constructed of one photo-cell and two transistors whereby a high integration density of the solid state imaging device is attained

Article having self-cleaning coating

Abstract: A slip containing a frit and an oxidizing catalyst is sprayed over a substrate and fused at a temperature as low as 550° C. The frit consists of 15-60% by weight of SiO2, 9-35% of B2 O3, 10-30% Na2 O, 1-25% of Al2 O3, 0-20% of Li2 O, 0-10% of K2 O and 0-10% of CaO but must have at least two of Li2 O, K2 O and CaO. The oxidizing catalyst is MnOx or CuCO3 Cu(OH)2 or a mixture thereof, the content being preferably between 5 and 50% by weight. The self-cleaning is effected at a temperature as low as at 280° C.

Method of fabricating three-dimensional epitaxial layers utilizing molecular beams of varied angles

Abstract: Three-dimensional structures having a suitable geometrical configuration are directly formed on one major surface of a substrate so that an epitaxial molecular beam may be incident on preselected regions, and the angles of incidence of epitaxial molecular beams are varied. As a result the arrival rates of molecular beams are varied from one region to another on the substrate so that a three-dimensional epitaxial layer in which the physical properties are different from one region of a submicron across to another may be grown.

Apparatus for controlling pH of culture solution for a living organism

Abstract: Electrolysis is employed for raising or reducing pH of culture solution. Electrolyte contained in a vessel having at least one ion exchange membrane as a wall is provided so as to confront the culture solution, with the ion exchange membrane lying therebetween. Electrodes are provided both in the electrolyte and the culture solution. With these electrodes the electrolysis is carried out through the ion exchange membrane. Thus formed alkali or acid changes the pH of the culture solution. By controlling the time or supplied current for the electrolysis, required pH can be accurately obtained.

Magnetic head and method of making the same

Abstract: A thin film type magnetic head, in which a conductor is accommodated within a groove formed in part of a ferromagnetic substrate constituting part of a magnetic core, and a ferromagnetic film is disposed on the conductor to constitute part of the magnetic core. With this structure, it is possible to reduce the number of steps of layers constituting the magnetic head for reducing damage or breakage of the stepped portions of the layers and also increase the core gap in a central part of the core so as to reduce leakage flux even in the thin film magnetic head as well as bettering dissipation of Joule heat produced in the conductor.

Moisture content meter

Abstract: of the Disclosure A moisture content meter is disclosed, which comprises a microwave generator for generating a microwave signal having a constant power level, a micro-strip trans-mission line connected to receive the microwave signal from said microwave generator at one end thereof and located at such a position that the sample material to be measured, for instance cereal, can contact the surface thereof, and a microwave detector connected to the other end of the micro-strip transmission line to detect the remaining power level of the microwaves after absorption by the sample material. The moisture content meter is capable of measuring the moisture content of flowing or moving objects without impeding the flow and irrespective of the bulk of the sample to be measured.

Apparatus for detecting the breaking of a glass plate

Abstract: The present invention is an apparatus for detecting the breaking of a glass plate. The invention uses a piezoelectric element, a signal separating circuit and a gate circuit. The piezoelectric element converts the vibrations of the glass plate into an electrical signal. The signal separation circuit separates the electrical signal into two signal signal components. The first signal component has a frequency range of less than 50 kHz. The second signal component has a frequency component higher than 100 kHz. The gate circuit produces an output signal only when both of the signal components have a signal level higher than their respective predetermined levels. By simultaneous detection of both of the first and second signal components, erroneous indication of the breaking of a glass plate can be prevented.

Safety equipment for gas burner

Abstract: A safety equipment for a gas burner is disclosed wherein a combustion sensor comprising an oxygen concentration cell having porous electrodes disposed on both sides of a sintered body of ion conductive solid electrolyte, is provided, so that incomplete combustion and extinction of the burner are detected by a change in e.m.f. of the sensor and a change in resistance of the sensor. The detected signal is used to block the feed of fuel to the burner in order to prevent CO gas poisoning and explosion.

Method for growing semiconductor crystal

Abstract: OF THE DISCLOSURE: When a highly resistive GaAs film doped with a metal impurity such as Fe, Ni or Cr is epitaxially grown, a metallo-cene of this metal impurity such as Fe(C5H5)2, Cr(C5H5)2, or Ni(C5H5)2, or a derivative of this metallocene is employed as a starting material of this impurity. Even at room temperature or a temperature lower than room temperature a metallocene or a derivative thereof has such high vapor pressure as to per-mit the epitaxial growth of a semi-insulating film so that heating of a line for feeding an impurity into a reaction tube may be eliminated and consequently an epitaxial system may be much simplified. Furthermore, introduction of the impurity into the reaction tube may be instantaneously started or stopped by opening or closing a stop valve inserted into the feed line so that the impurity distribution may be sharply changed from one semi-insulating epitaxially grown film to another.

Picture image display device

Abstract: The present invention relates to a picture image display device constituted a control electrode for taking out an electron beam from a flat electron source and a display plate for emitting light in accordance with the impinging of the electron beam. The picture image display device has a control for deflecting the electron beam before it reaches the display plate, a plural number of slits are provided in an insulating substrate, on the wall surfaces of which slits are electron beam controlling electrodes.

High speed feeding and rewinding mechanism in a magnetic tape recording and reproducing apparatus

Abstract: In a magnetic video tape recorder apparatus of the cassette type a magnetic tape housed in a tape cassette is led out through tape lead out means and then is contacted against magnetic heads for recording and reproducing operations. In a stop operation of the recorder apparatus, the magnetic tape will be restored into the cassette. In a high speed feeding or rewinding operation succeeding a stop operation, the magnetic tape is automatically moved at a high speed after the tape has been restored in the cassette following the actuation of a high speed feed or rewind button after actuation of a stop button.