Abstract:
An electric field forming unit that has a long surface life, high reliability, and provides a uniform surface corona discharge along the entire length of the discharge electrode. The electric field forming unit includes a dielectric substrate made of a fine ceramic having a discharge electrode and an inductive electrode formed on opposite sides thereof. The discharge electrode has peripheral edges which are provided with a better linearity than a discharge electrode formed from an electroconductive paste by screen printing. The discharge electrode may be formed of a metalized tape in a thin line form.
Abstract:
A compact, large capacity ozonizer device includes an insulated first ceramic substrate provided with an electrode on one or both sides, and a support such as a corrugated member attached to the first substrate and on which is mounted a second substrate composed of metal or insulating ceramic with an electrode mounted thereon, the first and second substrates and the first support means forming a space through which a gas is passed to be oxidized when a high voltage is applied across the two electrodes or the electrode and the metal plate. A third substrate is supported by a second support member mounted on the second substrate to form a space through which cooling fluid is passed, the cooling fluid moving in a direction different from the direction that the gas to be oxidized flows.
Abstract:
A high-frequency high-voltage power supply in which a high-frequency high-voltage is generated with the aid of L-C oscillation without a high-frequency primary power supply or a high-frequency high-voltage converter. The negative output terminal of a first D.C. high-voltage power supply and the positive output terminal of a second D.C. high-voltage power supply are connected together and to one of the high-frequency high-voltage output terminals. Tank capacitors are connected between the positive and negative output terminals of the power supplies, respectively. One end of a first combination of a first thyristor and a first rectifier connected in anti-parallel relationship is connected to the positive output terminal of the first power supply with the anode of the first thyristor connected to the positive output terminal. One end of a second combination of a second thyristor and a second rectifier connected in anti-parallel relationship is connected to the negative output terminal of the second power supply with the cathode of the second thyristor connected to the negative output terminal. The other ends of the first and second combinations are connected to each other and to the other high-frequency high-voltage output terminal through a resonant inductance. A control device feeds high-frequency current pulses alternately to the gates of the thyristors to turn on the corresponding thyristors alternately.
Abstract:
An improved high-efficiency electrostatic air filter device which has a high efficiency of dust collection and a long service life. The device is composed of a charging section having a plurality pairs of electrodes to charge the dust particles in the gas to be treated; and a dust collecting section which is provided with a corrugated filter medium and spacer electrodes that are disposed in the troughs of the corrugations of the filter medium, and one of each pair of the electrodes in the charging section and the specer electrodes on one side of the filter medium in the dust collecting section are applied with high electric voltage.
Abstract:
An electrostatic powder painting apparatus has a cyclone structure for directing powder paint toward a surface which is to be painted. The cyclone structure includes a feed cylinder having an open outlet through which the powder paint is delivered toward the surface to be painted, this feed cylinder having an outlet which is spaced from the outlet and which is adapted to receive air and powder paint suspended therein. The air is given a whirling motion within the feed cylinder so that the powder paint suspended in the air is centrifugally advanced along the inner surface of the feed cylinder from the inlet toward the outlet thereof, a conduit communicating with the inlet to supply thereto air with powder paint suspended therein. An exhaust cylinder, whose diameter is smaller than the feed cylinder, communicates coaxially with the feed cylinder to discharge air from the interior thereof. An air supply communicates with the conduit while between the air supply and the inlet of the feed cylinder there is a powder paint supply from which powder paint is delivered to the conduit to be conveyed with the air flowing therethrough to the inlet of the feed cylinder. The part of the above conduit extending from the powder paint supply to the inlet of the feed cylinder and the feed cylinder itself provide for the air and powder a path of flow extending along the interior of the conduit from the powder paint supply through the inlet into the feed cylinder and along the feed cylinder through and somewhat beyond the outlet thereof. Situated along this path of flow is a corona discharge electrode structure for electrostatically charging the powder paint with unipolar ions so as to drive the charged powder paint electrostatically toward the surface which is to be painted.
Abstract:
A turned-over or inverted section is formed at one end of a flexible, fluid impervious tube by turning the tube inside out and folding it back up on itself. With the turned-over end inserted in a pipe or conduit, the folded over end is secured to the pipe and then a fluid differential is created between the inside of the tube in the pipe and the inside of the pipe ahead of the tube which differential is great enough to cause the turned-over end of the tube to migrate along the pipe from one end to the other by drawing the tube into the pipe from the end which is not attached to the pipe. In this manner, a flexible tube can be installed in a pipe irrespective of the complex configuration into which the pipe is bent or the variations in cross-sectional shape which may exist along the length of the pipe. The disclosure also includes an apparatus providing a pipe engaging means for forming the inverted end of the tube and sealing it to the end of the pipe. The apparatus also included a chamber for pressurized fluid in which a quantity of the collapsed tube is stored in a manner to be progressively released as the tube is inserted in the pipe.
Abstract:
An electric dust collector apparatus is disclosed herein; which comprises an inlet port for dust-containing gas, a main body duct of said electric dust collector, an outlet port for clean gas, and an exhaust port for collected dust; a plurality of channel-shaped collector electrodes disposed at an equal interval and in parallel to each other along a plane transverse of a gas flow within the main body duct with their opening directed to an upstream side; a plurality of channel-shaped driver electrodes disposed upstream of said collector electrodes at an equal interval, along a plane transverse of the gas flow within the main body duct in a staggered relationship to said respective collector electrodes, in parallel to each other and to said collector electrodes and as insulated from said collector electrodes with their openings directed to a downstream side; a plurality of corona discharge electrodes disposed midway between adjacent ones of said driver electrodes in parallel thereto and opposed to inner surfaces of the openings of said collector electrodes in parallel thereto, as insulated from both said driver and collector electrodes; a D.C. high voltage source for applying a D.C. high voltage between said driver electrodes and said collector electrodes; a variable D.C. high voltage source for applying a D.C. high voltage having a variable voltage value between said corona discharge electrodes and said driver electrodes, and/or a variable, periodically varying, high voltage source for applying a periodically varying high voltage, whose peak value and/or period are variable, between said corona discharge electrodes and said driver electrodes; and hammering means for applying mechanical impacts to said collector electrodes, driver electrodes and corona discharge electrodes.
Abstract:
A method for sterilizing objects to be sterilized is disclosed, in which an object to be sterilized such as a hand piece is preliminarily brought into a wetted state, and then accommodated and air-tightly closed up within a sterilizing chamber communicated with an oxygen cylinder, oxygen fed from the oxygen cylinder is introduced into an ozonizer to produce ozonized oxygen gas having an ozone concentration of at least 10000 ppm, preferably 15000 ppm or higher, then the ozonized oxygen as is made to pass through the sterilizing chamber after it has been heated up to perfectly replace air within the sterilizing chamber by the ozonized oxygen gas, also moisture adhered to the objects to be sterilized is partly evaporated, subsequently the communication between the sterilizing chamber and the oxygen source is interrupted, the ozonized oxygen gas is circulated through the sterilizing chamber and the ozonizer while it is heated up at the inlet of the sterilizing chamber to thereby enhance the ozone concentration up to at least 20000 ppm, preferably up to 30000 ppm or higher without consuming oxygen, and meanwhile, bacteria adhered to the objects to be sterilized are sterilized surely in a short period of time by the ozone gas under an inflated and wetted condition of the bacteria.
Abstract:
An electric field device is obtained by the steps of employing a highly pure and mechanically electrically chemically and thermally extremely durable ceramic material, such as a high purity alumina porcelain, as a dielectric material, disposing electrodes on the shaped material before sintering by a thick film printing technique, such as screen printing, with a dispersion ink of finely divided metal, e.g. tungsten, and sintering the shaped material integrally with the electrodes. The product is extremely dense, mechanically electrically chemically and thermally durable and highly reliable.
Abstract:
The specification discloses a film-shaped dust collecting electrode and an electric dust collecting apparatus having a stack of the electrodes. The electrode includes a conductive film painted onto a central area of a surface of a rectangular insulative film. A terminal base and a terminal conductor of a tongue shape extend from one shorter edge of the insulative film. A plurality of spacer protrusions are provided at spaced intervals along the opposite longer edges of the insulative film. The spacer protrusions along the opposite longer edges are staggered from one another with the conductive film intervening therebetween. Hollow frustoconical coupling protrusions are disposed symmetrically about the intersection of the two diagonal lines of the insulative film. The height of the coupling protrusions is higher than that of the spacer protrusions. In the dust-collecting apparatus, a plurality of the electrodes is stacked with the direction of terminal conductors alternately reversed. The coupling protrusions prevent relative displacement between adjacent electrodes.