Abstract: A method and apparatus for controlling an injection process in cold-chamber die-casting machines which work on a three-phase system whereby an automatic initiation of the third phase without delay is possible. Beginning with the plunger of the apparatus in a certain starting position, the time is measured which elapses until a pressure in a working cylinder ahead of the plunger has reached a predetermined value. The time delay of the valve system which releases the pressure medium feed in the third phase is subtracted from the time measured so as to arrive at a time differential. At the end of the time differential, which elapses when the injection process begins with the plunger in its original or starting position, serves as a starting signal to trigger the valve system.

Abstract: Micro-wave plasma etching is carried out with a gas containing at least SF.sub.6 as an etching gas at a high etching rate of silicon, and a high selectivity, with an easy monitoring and a low temperature dependency.

Abstract: Disclosed is an improved method of growing an epitaxial layer preventing auto-doping from a doped region exposed to a surface of a semiconductor substrate. A surface of a semiconductor substrate of one conductivity type is covered with a mask having a predetermined opening. Then, impurity atoms are doped into the substrate through the opening to form a region of the other conductivity type. An epitaxial layer of one conductivity type is deposited over the exposed surface of the substrate with another mask which covers the entire surface of the region and has an area larger than that of the exposed surface of the region. The latter mask prevents auto-doping from the region of the other conductivity type. The process is usable for controlling, for example, channel widths of field effect semiconductor devices uniformly and precisely.

Abstract: An elevator test operation apparatus for a multi-floor service elevator comprises a digital computer for processing an elevator control signal. The digital computer is provided with means for storing an elevator operation control program, and interface means for transferring a signal from an elevator control system to the digital computer or transferring a signal from the digital computer to the elevator control system, thereby to process the signal from the elevator control system in accordance with said elevator operation control program.

Abstract: An apparatus for detecting undesirable combustion characteristics in spark-ignited internal combustion engines. A sensor and a band-pass filter tuned to the frequency of the knock vibration are provided with an output of the band-pass filter being compared with a reference value. The result of the comparison is correlated with undesirable combustion characteristics to be recognized. A rectifier is provided for solid-borne sound signals received by the sensor with the signals passing through the band-pass filter. The signal is rectified in the rectifier to a knock signal and a series circuit made up of a band-stop filter tuned to the frequency of the knock vibration, an rms rectifier, and an amplifier is provided by means of which the sound signal received by the sensor is converted into a reference signal. A comparator is provided when the reference signal and the knock signal are compared with each other and an output signal appears if the knock signal exceeds the reference signal.

Abstract: In a digital signal transmission system wherein input digital signals having an arbitrary bit rate are converted into digital signals of a bit rate higher than that of the input digital signals and then transmitted through a signal format converter; in order to realize the signal format conversion in real time the signal format converter is constructed of a buffer circuit of small capacity, a circuit which writes the input signals into the buffer circuit at the bit rate of said input signals and which reads out the written signals at the bit rate of a transmission line, a circuit which distinguishes the signals to-be-read as a mark, space and empty, and an encoding circuit which converts the mark, space and empty into pulse signals discernible with the unit being a time slot of the transmission line or integral times the time slot, in dependence of the levels of pulses or the numbers of successive pulses (run length).

Abstract: A semiconductor laser device is formed of a semiconductor material assembly including a first semiconductor layer having an active region formed directly by crystal growth on a substrate for the crystal growth having on the surface thereof a second semiconductor layer. A third semiconductor layer is also formed on the first layer. The refractive index of each of the second semiconductor material region and the third semiconductor layer is smaller than that of the first semiconductor layer while the band gap of each of the second semiconductor material region and the third semiconductor layer is broader than that of the first semiconductor layer.

Abstract: A capability control apparatus for a cooling system having a direct expansion type evaporator comprises a control valve mounted in a heating system for a generator for controlling an amount of heat to be given to the generator. Temperature sensors are mounted at inlet and outlet sides, respectively, of a cooling system for an absorber, and an arithmetic unit is connected to the temperature sensors and the control valve. The arithmetic unit calculates the amount of heat to be given to the generator based on signals transmitted from the temperature sensors to the unit and issues and transmits to the control valve a control signal for controlling the latter.

Abstract: An impulse resonance spectrometer is provided, wherein high frequency energy in the shape of pulses is applied to a sample material located in a polarizing magnetic field, to detect a nuclear magnetic resonance signal from the sample material. The spectrometer includes a first oscillator which oscillates at a first high frequency for generating a first frequency signal corresponding to a main signal of the nuclear magnetic resonance signal. A nuclear magnetic resonance signal measuring device measures the difference between frequencies of the main signal and a subsidiary signal of the nuclear magnetic resonance signal detected from the sample material by applying the output of the first oscillator to the sample material.

Abstract: A recuperator for heat exchange between two flow media of dissimilar temperatures is formed by a housing containing the flow of a first of the two flow media and a plurality of essentially parallel slidably supported tubes containing the flow of the second flow medium. The tubes are made of a highly heat resistant material, such as ceramic material, and are biased at one end by an expansion pressure device that acts upon flow deflection connectors at the one end of the tubes. In one preferred embodiment, the expansion pressure means utilizes spring force, while in other preferred embodiments, the expansion pressure device uses a compressible medium for applying the biasing force.

Abstract: A submersible motor apparatus having a plurality of unit motors connected in series through their shafts in the direction of application of gravity. The shaft of an uppermost unit motor constituting an output shaft of the motor apparatus to which a pump is to be connected. The submersible motor apparatus has an upper thrust bearing disposed above the level of the stator core of the uppermost unit motor and adapted to bear the axial load applied to the shaft of the uppermost unit motor, and a lower thrust bearing disposed below the level of the stator core of a lowermost unit motor and adapted to bear the axial load exerted to the shaft of the lowermost unit motor. The shafts of the unit motors are connected in series by splined couplings.

Abstract: An apparatus for controlling the running track of a trackless moving body comprising a guide wire, a position deviation sensor unit mounted on the trackless moving body for sensing a deviation of the position of the moving body relative to the guide wire, a steering control circuit connected to the position deviation sensor unit, and a steering drive unit connected to the steering control circuit for steering the moving body. The steering control circuit comprises a first-order lag circuit receiving the output signal from the position deviation sensor unit, a subtractor receiving the output signal from the position deviation sensor unit and the output signal from the first-order lag circuit, and a comparator receiving the output signal from the subtractor.

Abstract: A suction pipe is provided to suck and introduce air from its one end and is connected at its other end to an internal combustion engine. The suction pipe is provided at its one end with a venturi portion and a throttle valve. A first negative pressure detector is provided to detect the negative pressure at the portion of the suction pipe remote from the internal combustion engine, so as to sense a comparatively gentle pressure rise in the suction pipe. A control valve is provided to be opened and closed in accordance with the output from the first negative pressure detector, thereby to control the flow rate of air supplied into the suction pipe. A second negative pressure detector is provided to detect the negative pressure at a portion of the suction pipe remote from the internal combustion engine, so as to sense an abrupt increase of the negative pressure in the suction pipe.

Abstract: A light-emitting diode arrangement with a light-emitting diode that is light-transmissive in an axial direction of the type used in examining instruments for opthalmic optics. The light-emitting diode serves as a constant light source in conjunction with a diffusion disk, such as for fixation point stimuli, while the disk also serves as a stimulus that is lit by an additional, switchable light source, such as an incandescent lamp, whose light is transmitted through a light guide, such as an optical fiber, through the light-emitting diode to the disk. In a preferred embodiment, a color filter is arranged between the additional light source and the light-emitting diode and both the additional light source and light-emitting diode are axially displaceable relative to the diffusion disk so as to enable adjustment of their respective luminous densities.

Abstract: A solid-state color imaging device includes a plurality of different color filters arranged above photo-electric conversion elements arranged in matrix, such that each of chroma signals necessary for color reproduction includes the same spectrum of vertical smear component. A single memory is provided to store a vertical smear component included in one of the chroma signals necessary for the color reproduction. By subtracting a predetermined multiple of the output of the memory from the output signals on all of the chroma signal output lines, the vertical smear components appearing in all of the chroma signal output lines are eliminated.

Abstract: A casting core for an intake pipe assembly for an in-line four to six cylinder internal combustion engine. Core parts for each two similar individual intake pipes form, together with the core parts for the intermediate part of the intake manifold, an integral core segment. The core segments are permanently connected to one another in a vicinity of their core parts for the intake manifold.

Abstract: A cover for lights, especially automobile lights, wherein at least a part of the cover which is located within a flat area of a reflector opening of the light when the cover is installed is provided with a number of individual sections. The sections are staggered in a stepwise fashion within a plane which is horizontal in the installed position and/or in a vertical plane with the sections extending in a direction opposite to an intended direction of travel of the atuomobile.

Abstract: A combustion apparatus comprising a flame nozzle face of the burner being provided in a combustion chamber to face toward an opening of a throttled part provided within a burner frame, a mixed gas being injected into the combustion chamber from the flame nozzle at the flame nozzle face and at the same time a secondary air being supplied from both sides of the flame nozzle face, wherein optimum dimensional ranges of respective parts in combustion section are clarified and complete combustion is ensured thereby for any kind of fuel.

Abstract: In a logic circuit comprising a low-amplitude CML circuit including a transistor functioning as a constant-current source, the constant-current source transistor is biased by a bias power source which is capable of compensating for both the power supply voltage dependency and the junction temperature dependency of the CML circuit. In the logic circuit, negative feedback is applied to the constant-current source transistor through its base bias circuit to compensate for the dependency of the constant-current source transistor on the power supply voltage, and the difference between the junction temperature dependency of the junction voltage of one of two transistors in the control circuit and that of the other transistor due to the different emitter current densities is utilized to compensate for the dependency of the constant current source transistor on the junction temperature.