PURPOSE:To form a small-diameter through-hole, and to obtain a printed wiring board corresponding to surface mounting by exposing and developing a resin layer and a photosensitive resin layer through a mask, forming an etching resist layer, etching a conductive layer and removing the resin layer and the photosensitive layer CONSTITUTION:A substrate 1 is bored and plated with copper, a conductive layer 2 through copper plating is formed on the inwall surface of the hole 3 and the surface and rear of the substrate 1, and a resin mask 4 is applied onto the surface and rear of the conductive layer and dried The substrate 1 is dipped into an electrodeposition resin solution, DC electrolysis is applied, and a resin layer 5 is electrodeposited onto the conductive layer 4 on the inwall of the hole 3 The masks 4 on the surface and rear of the substrate 1 are removed, the whole is dipped into an electrodeposition photosensitive resin liquid, DC electrolysis is applied and photosensitive resins 6 are shaped onto the surface and rear of the substrate 1 An etching resist composed of the resin layer 5 and the photosensitive resin layers 6 is shaped through exposure and development through a mask, and the resin layer 5 and the photosensitive resin layers 6 are peeled and taken off through etching Accordingly, a printed wiring board capable of corresponding to surface mounting is acquired

Manufacture of printed wiring board

PURPOSE:To eliminate the influence of magnetic field noises, etc., by putting a magnetic detecting element, and a magnet and a spherical body at close distances and providing the magnet on the downstream side of a spherical body receiver. CONSTITUTION:The spherical body 22 abuts on the peripheral abutting surface 23 and peripheral abutting wall 27 of the spherical body receiver 26 at two points by a swivel flow, and swivels and rotates within the range of a vertical surface 21 at right angles to the flow of fluid. The swiveling speed of this spherical body 22 is determined by the swivel flow rate, but the flow passage area of a fixed vane 20 is constant, so the swivel flow rate is proportion to the flow rate. For the purpose, the swiveling speed of the spherical body 22 is detected to measure the flow rate. A magnetism detecting element 38 is applied with a magnetic field having constant intensity from the magnet 39. In this state, when the spherical body 22 passes below the element 38, the direction of the magnetic flux from the magnet 39 to the element 38 is changed by a metallic bead put in the spherical body 22. Consequently, the magnetic field applied to the element 38 decreases in its intensity and the resistance value of the element 38 varies. This variation is led out as variation in voltage and outputted as pulses. Thus, the influence of magnetic noises, etc., entering the element 38 is removed.

Flow rate detector

A method and system for fine-tuning the motion of suction or discharge valves associated with cylinders of a reciprocating gas compressor, such as the large compressors used for natural gas transmission. The valve's primary driving force is conventional, but the valve also uses an electromagnetic coil to sense position of the plate (or other plugging element) and to provide an opposing force prior to impact.

Semi-Active Compressor Valve

PURPOSE:To enlarge the service temperature range by varying the oscillating frequency of the control current on the basis of the detection information by a temp sensing means to sense the temp of a working oil CONSTITUTION:A temp sensor 17 senses the temp of a working oil in a decompressing valve 11, and the temp of the working oil as detection information is fed into a control circuit 16 A No2 control part 19 of this control circuit 16 varies the oscillating frequency of the control current on the basis of detection information by the temp sensor 17, and the frequency of a dither to be applied to a spool 1 is optimally controlled according to the working oil temp of the decompression valve 11 Therefore, dither of the decompression valve 11 as valve element is easily promoted even in the low temp range This decreases the friction resistance of the valve element in a wide temp range, to lead to enhancement of the pressure accuracy of control oil pressure

Control device for electromagnetically proportional control valve

The invention provides a liquid fuel burner. The liquid fuel burner consists of a burning device, a gasification device and a preheating device, wherein the gasification device is arranged on the burning device; the gas outlet end of the gasification device is connected with the furnace end gas inlet hole of the burning device; and the preheating device is arranged outside the gasification device. The liquid fuel burner solves the following world-class problems: firstly, liquid burning of the liquid fuel is changed into gas burning, so that the problem of high energy consumption is solved, and the tests show that energy can be saved by over 65 percent; secondly, the temperature of the liquid fuel in the gasification device is effectively controlled to be about 250 DEG C, so that the problem of carbon accumulation is solved; thirdly, the flame temperature is improved to be over 1,100 DEG C, the fire is fierce and the heating speed is high, so that the problem of low heat value is solved; fourthly, the gasification speed is high and the burning is stable; and the fifthly, the burning is complete and the exhaust emission load after burning is less than one tenth that of the national relative standard, so that the effect of environmental friendliness is achieved. The liquid fuel burner breaks through the technical barriers of the liquid fuel burning and makes the popularization of the liquid fuel, particularly the alcohol-based fuel, come true. Meanwhile, the liquid fuel burner is an ideal choice for the industrial furnace burners and the popularization of the burner greatly contributes to the country.

Liquid fuel burner

PURPOSE:To eliminate the necessity due to negative pressure for increasing force opening both a solenoid valve and a proportional control valve, by providing a check valve so as to prevent the negative pressure from being generated in an enclosed passage formed by an outlet side of the solenoid valve and an inlet side of the proportional control valve CONSTITUTION:A solenoid valve 1 and a proportional control valve 9 are connected in series A control device, when its operation is stopped, forms an enclosed passage 21 by an outlet side 3 of this solenoid valve 1 and an inlet side 19 of this proportional control valve 9 The device provides a check valve 27 between this enclosed passage 21 and an outlet side of the proportional control valve 9 And fuel gas infiltrates into the rubber material of a diaphragm 10 when the operation is stopped for a long time As a result, negative pressure is generated in the enclosed passage 21, and the control device is constituted such that the check valve 27 opens eliminating the negative pressure

Gas control device

PURPOSE:To make the operation of a valve stable and sure, by causing the electromagnetic force, which is generated by flowing a current to the coil wound around a bobbine, to act upon the valve constituting a governor part and supporting the bobbine by plural diaphragms. CONSTITUTION:A valve body 1 is provided with a fluid inlet 2, a valve seat 3, and a fluid outlet 4. A magnetic circuit consisting of a top yoke 10, a permanent magnet 11, a bottom yoke 12, and a center yoke 13 is formed on the valve body 1, and a bobbine 16 with a coil 15 wound around is placed in a gap 14, and power is supplied through a lead wire 17. The outside circumference of a diaphragm 18 is fixed to the valve body 1, and the inside circumference is fixed to a bobbine 16'. The center of a diaphragm 6 is brought into contact with the lower end face of the bobbine 16' through a diaphragm pad plate 19 and passes through a shaft part 20 of a valve 5 and is fixed and tightened as one body. On the bobbine 16', 1 or 2 through small holes are provided in the part facing a backpressure chamber (a). Thus, the intercorrelation between pressure of a secondary pressure chamber (c) and the current of the coil is stabilized to prevent the vibration of the valve, thereby making a stable and sure control possible.

Pressure proportional control valve

PURPOSE:To make it possible to controll the gas pressure with the reduced electric power, by controlling the motor of an electrically driven pressure proportional controlling valve, which regulates the gas flow by changing the spring power, according to a load signal CONSTITUTION:While water, which streams through a heat exchanger 11, is not heated yet, resistance of a temperature detecting element 12 stays in the maximum value, a motor 26 of an electrically driven pressure proportional controlling valve 34 is revolved through a proportional controlling circuit 37, a slide pin 22 is pushed downward by a cam 25, and the combustion quantity of a burner is increased to the maximum As a signal of a position detector, which detects the motion placement of a movement transmission mechanism, is input into the proportional controlling circuit 37, the motor 26 can be stopped at that position When the hot water temperature rises and resistance of the temperature detecting element 12 becomes lower, the motor 26 is revolved in reverse direction as the supplying gas pressure to the burner becomes lower If the heated water flow is increased/decreased, or the water temperature is changed, the hot water temperature is kept at an almost fixed value, because the proportional controlling circuit 37 controls the motor 26

Electrically driven gas pressure controller

PURPOSE:To improve the precision in flow-rate control by forming the magnetic saturation parts onto the material constituting an electromagnetic driving part in the proportional control range for a proportional control valve, thus reducing the gain of the flow-rate control characteristic. CONSTITUTION:In the electric conduction state, a set signal SS and a combustion-load signal are compared with each other in a comparator 19, and the deviation signal therefrom transforms into a d.c. current having dither signals superposed in a control circuit 18, and is supplied into a coil 33. A plunger 37 has a notched part 38 for reducing the sectional area for magnetic saturation. Though magnetic saturation is generated when the electric current increases over a certain value, the increased hysteresis due to magnetic saturation can be reduced by the dither signals.

Gas flow-rate controller

PURPOSE:To obtain stable closing performance, by providing an spherical rounded surface, equipping a lubricating film, in the sliding surface of an elastic member, provided in a valve seat, for a valve body so as to closely attach the spherical rounded surface to the valve seat even when the elastic member changes its adapted position to the valve body CONSTITUTION:A valve body 9 provides a valve seat 12 between a fluid inlet 10 and a fluid outlet 11 While the valve seat 12 detachably arranges a valve unit 13 providing a diaphragm 14, operated by receiving the pressure in a side of the fluid inlet 10, and a seal groove 17 having a stop protrusive part 16 And an elastic member 18a, providing a spherical rounded surface 19a having its center point P on a center acisl line Cl of the valve seat 12, is mountes so as to compress a wall surfce 20 of the seal groove 17 Here the spherical rounded surface 10a adapted to the valve seat 12 provides a lubricating film 21a of good adhesiveness to the elastic member 18a In this way, stable closing performanace is obtaind by closely attaching the whole periphery of the spherical rounded surface 19a to the valve seat 12 even when the elastic member 18s is adapted to the valve seat 12 in a position being displaced

Shirai Shigeru

Papers

Gas control device

Pressure proportional control valve

Electrically driven gas pressure controller

Gas flow-rate controller

Pressure control valve with closing function