Abstract: An apparatus for joining two ceramics using microwave energy, having a cavity resonator in which the ceramics are placed; a microwave-generator means for producing microwave radiation to be introduced into the cavity resonator; a pressurizer for pressing the joining surfaces of the ceramics against each other; and a temperature controller for controlling the temperature distribution of the ceramics in such a way that the temperature of the ceramics at the joining surfaces is highest and rapidly decreases toward the unjoined ends of the ceramics is disclosed. The microwave-generator may include a microwave oscillator, a klystron amplifier, and an isolator. The temperature controller can be a dielectric heater or a combination of a dielectric heater and a temperature difference-producer.

Abstract: An apparatus for heating a ceramic by microwave power. The apparatus has a cavity resonator in which the ceramic is placed. The resonator is provided with a variable iris. The apparatus detects the temperature of the ceramic or other state of the ceramic, and adjusts the area of the opening in the iris in the resonator and the resonant frequency of the resonator according to the signal produced by the detection, in order to bring the resonator substantially into resonance and the degree of coupling to exactly or nearly unity. Alternatively, the apparatus adjusts its microwave power for these purposes. The apparatus can heat the ceramic efficiently at a desired heating rate.

Abstract: A microwave and luminous probe which employs a coaxial cable in place of a waveguide. The coaxial cable includes a transparent insulator interposed between an inner conductor and an outer conductor. Accordingly, a microwave is propagated between the inner and outer conductors, while light is transmitted by the transparent insulator.

Abstract: A microwave and luminous probe for use in a system for detecting the piston position in an internal combustion engine and the light emitted in a combustion chamber thereof on the basis of a microwave signal and a luminous signal includes a hollow cylindrical case body fitted into the combustion chamber, internal and external conductors coaxially inserted within the case body and having different diameters from each other in the ratio of from 1:1.5 to 1:4, an annular passage defined by an annular space formed between the internal and external conductors and serving as microwave and light transmitting members, and a dipole antenna composed of a metal tube forming the internal conductor protruded from the annular passage in the range of from 1/8 to 3/8 of the wavelength of the microwave. The probe detects the light emitted by combustion in the combustion chamber with high accuracy.

Abstract: An apparatus for detecting combustion timing in an internal combustion engine comprises: a microwave unit including a microwave oscillator for generating a microwave having a predetermined frequency, a transmission and reception separator for separating transmitted and received microwaves from each other, and a detector for detecting the received microwave so as to be converted to a low frequency signal; a probe including a microwave sensor for radiating the microwave from the separator into a combustion chamber and receiving a reflected wave, and a light sensor for electrically detecting light emitted upon combustion in the combustion chamber; and a processing unit including a peak detector circuit for detecting peaks of a microwave signal supplied by the detector, a luminous signal processor for detecting a peak value of a luminous signal supplied by the light sensor in each cycle and also detecting the time when the luminous signal reaches an intensity having a predetermined proportion to the peak value th

Abstract: An improvement of a vehicle collision anticipating method and device using transmitted and reflected frequency-modulated continuous waves is provided. A low frequency wave is produced by mixing a part of transmitted wave and a reflected wave from the object. The low frequency wave and a Doppler signal obtained from the low frequency wave are signal processed so as to generate signals. A predetermined distance range is obtained by multiplying a time which is determined by the distance between the vehicle and object and the velocity of said object with respect to the vehicle obtained from the Doppler signal, by a relative velocity of the object with respect to the vehicle. A collision of the object against the vehicle is anticipated by detecting the object entering the predetermined distance range in front of the vehicle.

Abstract: A distributor containing an apparatus for suppressing noise is described, comprising a first spark discharging gap and a second spark discharging gap which exists close to the first spark discharging gap both of which are located between the electrodes of a distributor rotor and a stationary terminal, wherein the second spark discharging gap is formed through a dielectric member which is fixed to the distributor rotor and/or a stationary terminal, and the gap distance of the second spark discharging gap is shorter than that of the first spark discharging gap. The difference between the first spark discharging gap distance and the second spark discharging gap distance should be less than 3mm but greater than 0.2mm. Preferably, the difference should be less than 1.5mm but greater than 0.5mm.

Abstract: A noise suppressor for a vehicle including a branch circuit of low impedance connected to an electrical circuit through which a high frequency current passes in a standing wave. The branch circuit is connected at approximately a point corresponding to a node of the standing wave, and is of a length related to the wavelength of the current.

Abstract: In a vehicle an alarm issues a warning signal just before actuation of an automatic emergency brake which operates in response to the relative speed and relative distance beween the vehicle and an obstacle in the vehicle's path.

Abstract: A distributor containing an apparatus for suppressing noise is described, comprising a first discharging gap and a second discharging gap which exists close to the first discharging gap both of which are located between the electrodes of a distributor rotor and a stationary terminal, wherein the second discharging gap is formed through a dielectric member which is fixed to the distributor rotor and/or a stationary terminal, the gap distance of the second discharging gap is shorter than that of the first discharging gap.

Abstract: A method of and a device for suppressing the leakage of radio waves radiated from a vehicle by using a bonding means which connects the opposing body portions in the positions of interstices which show the minimum leakage of radio waves therethrough when said opposing portions are not connected.

Abstract: A distributor containing an apparatus for suppressing noise is described, comprising an electrode of a distributor rotor and a group of electrodes of a plurality of stationary terminals which are arranged along a circular locus defined by the rotating distributor rotor keeping a constant spark discharging gap, wherein the surface of at least one of said electrodes of the distributor rotor and the stationary terminals is formed by an electrically high resistive material layer. The base layers for the electrodes and terminals are disclosed as made of silicon, brass, invar, steel and aluminum. The electrically high resistive layers are disclosed as made of silicon dioxide, copper oxide, aluminum oxide and invar oxide.

Abstract: A distributor containing an apparatus for suppressing noise is described, comprising a first discharging gap which exists between electrodes of a distributor rotor and a stationary terminal, both of which are located in the distributor and a second discharging gap to which a resistance element is connected in series, wherein the second discharging gap and the resistance element are connected close to and also, electrically parallel to the first discharging gap.