Abstract:
The present invention relates to a mounting of carbon electrodes on a holder of an arc lamp used as a light source for a weatherometer or a lightfastness tester. In the holder, one end of the carbon electrodes and the holder are threadedly connected with each other.
Abstract:
A carbon electrode for use in an arc lamp used for determining light fastness which has a central core of light emitting material combined with stabilizers and graphite surrounded by a first coating of low resistance electrically conductive material, preferably copper or aluminum. The thus-coated core is further coated with a second coating of graphite and adhesive and inserted into a cylindrical carbon tube. The tube, except for the top and bottom portions is coated around the outside with a third protective coating, and the base and bottom portions of the tube are coated with a metallic coating electrically connected to the first coating of low resistance material spaced from the third coating. The third and fourth coatings may be joined together, provided that the resistance of these two coatings is greater than the resistance of the first coating.
Abstract:
A xenon lamp equipped with magnets attached to the outside of the tube of the xenon lamp at the positions of the electrodes so that metal vapor and other volatile matter emitted from the electrodes at the time of glow discharge is attracted onto the inner wall of the tube at the positions of magnets due to the magnetic field of the magnets, whereby blackening and white turbidity on the light-transmitting part of the wall of the xenon lamp are avoided.
Abstract:
A carbon arc lamp for use in a light fastness tester. The lamp has an arc glow section, a base located at the top of the arc glow section, a heat radiating means integral with the upper side of the base, a heat collecting means integral with the side of the base facing toward the glow section, and a glass bulb extending from the base around the glow section. The heat produced due to carbon arc discharge in the glow section is collected by the collecting means and radiated to the outside of the lamp by the radiating means aided by the convection of the outside atmosphere to hold the base at a temperature lower than that of the glass bulb so as to eliminate or reduce deposition of ash resulting from the combustion of carbon on the light transmitting glass bulb which is at a higher temperature than the base by virtue of the tendency of the ash to be deposited to different extents, depending upon temperature, to thereby ensure emission of light through the bulb at a substantially constant luminous intensity.
Abstract:
Resistor material such as polysilicon is deposited on the insulating surface of a substrate and patterned to form resistor layers disposed generally parallel. Another resistor material such as polysilicon is deposited filling each space between adjacent resistor layers, with an insulating film being interposed between the upper and lower resistor materials, and etched back to form other resistor layers at respective spaces. After an insulating film is formed covering the resistor layers, contact holes are formed in the insulating film. A conductive layer is deposited and patterned to serially connect the resistor layers.
Abstract:
On the principal surface of an Si semiconductor substrate, a field oxide film is formed defining an active region. On the active region, an insulated gate structure is formed including a gate oxide film and a polycrystalline Si layer. At the same time, a lower capacitor electrode of the polycrystalline Si layer is formed on the field oxide film. The surface of the polycrystalline layer is oxidized to form an insulating film. Another polycrystalline Si layer is deposited covering the insulating film. A mask is formed over the lower capacitor electrode. By using this mask as an etching mask, anisotropic etching is performed to leave an upper capacitor electrode and side wall spacers on the side walls of the gate electrode and lower capacitor electrode.
Abstract:
A method of measuring or controlling ozone concentration by ultraviolet ray absorptiometry, includes charging air into a testing tank with its temperature controlled, measuring the disturbing gases generated from testpieces such as rubber samples inside the testing tank by regarding them as ozone, subtracting a value representative of the disturbing gases with a calculation circuit from a value indicative of the preexisting state in the tank to set the ozone concentration at zero, generating a necessary quantity of ozone with an ozonizer by using the zero ozone concentration as a reference point, suspending the generation of ozone after the passage of a predetermined time, measuring once again to obtain a new ozone concentration zero value, adjusting the ozone concentration zero value to the new value if there has been a change in the amount of disturbing gases generated, and repeating at least once the operation described above to regulate the ozone concentration to a desired ozone concentration.
Abstract:
A test oven wherein heated air having a predetermined temperature is supplied and the oxygen concentration in the supplied air is controlled. The test oven has a test oven body having an air supply port and an air discharge port, a blower connected to the air supply port for blowing air thereinto, an oxygen concentration detector connected to the test oven body, an oxygen concentration setting control unit connected to the oxygen concentration detecting detector and including an oxygen concentration setter for setting a desired level of oxygen, and an oxygen concentration controller constantly comparing a reference output level generated on the basis of a concentration level set in advance in the oxygen concentration setter with an output level outputted from the oxygen concentration detector and for controling the actual output level to a set level, and at least one oxygen concentration adjusting device. This can be an oxygen and nitrogen supply unit controlled by the oxygen concentration setting control unit for supplying an amount of oxygen and/or nitrogen to an air circulating passage upstream of the blower for regulating the concentration of the oxygen in response to the actual output level of the oxygen concentration setting control, or it can be a blower speed control for controlling the speed of the blower in accordance with such actual output level to blow air from outside into the oven body.
Abstract:
A light fastness/weather resistance accelerated test apparatus, including a test tank having a discharge duct, a light source at the center of the test tank with a sample rotating frame rotatable around the light source and a black panel thermometer mounted on the sample rotating frame. A sensor on the sample rotating frame senses the temperature at the position of a sample. An air flow regulator is provided on the test tank, a blower is mounted for discharging air into the bottom of the tank, and a circulating duct is connected between the air flow regulator and the blower. A damper in the air flow regulator is movable to open the inside of the tank to the discharge duct or to direct air from within the tank into the circulating duct. An air mixer has a further damper and a bypass opening into the air flow regulator. The further damper is controlled to direct air through the bypass in response to the temperature outside the apparatus.
Abstract:
In a colorimeter including a light source, a first quantity of light is directed toward a color sample and from the color sample toward a single photoelectric receiving and measuring device which is capable of measuring amounts of primaries or tristimulus values in quantities of light. A first carriage has mounted thereon an X primary filter, a Y primary filter and a Z primary filter, and such first carriage is reciprocable so that a selected primary filter may be positioned in front of the single photoelectric device. Adjacent the light source is mounted a second carriage which supports thereon an X primary filter mirror, a Y primary filter mirror and a Z primary filter mirror. The second carriage is reciprocable to position adjacent the light source a selected primary filter mirror corresponding to that primary filter positioned adjacent the photoelectric device. A second quantity of light from the light source is directed toward the selected primary filter mirror which reflects and changes the spectral characteristics of the second quantity of light. This second quantity of light is then directed toward the color sample and through the selected primary filter to the photoelectric device. Thus, the photoelectric device simultaneously receives two quantities of light and measures a resultant amount of the selected primary or tristimulus value therefrom.