baber/WOPTO huggingface dataset:
Patent JP-H07224043-A (JP)
Title: Production of hexahydropyridazine
Inventor: SUGIYAMA TATSUO
IPC: C07D237/04
Filed: 1994-02-10
Abstract: PURPOSE:To obtain a hexahydropyridazine compound useful as an intermediate for a benzothiazine herbicide industrially, simply and inexpensively by synthesizing a hexahydropyridazine-dicarboxyl derivative and decarboxylating the derivative without isolation. CONSTITUTION:First, a hydrazinedicarboxyl derivative of formula I (R<1> and R<2> each is an alkyl or an aryl) (e.g. dimethyl hydrazinedicarboxylate) is reacted with a dihalogenobutane (e.g. 1,4-dichlorobutane) of formula II (X<1> and X<2> each is a halogen) (e.g. 1,4-dichlorobutane) in an aprotic polar solvent (e.g. DMF) in the presence of an alkali metal hydroxide preferably at 40 to 70 deg.C for l-5 hours to give a hexahydropyridazine-1,2-dicarboxyl derivative of formula III. Then the compound, without isolation, is decarboxylated in the presence of an alkali metal hydroxide and a hydrogen donative compound (preferably water) preferably at 90 to 120 deg.C for 2-8 hours to give the objective compound.
Patent JP-S59165957-A (JP)
Title: Snubber circuit of power converter
Inventor: NOMURA TOSHIHIRO
IPC: G05F1/455
Filed: 1983-03-08
Abstract: PURPOSE:To reduce power loss by discharging a snubber capacitor by the induced voltage and its leakage reactance of an auxiliary winding provided in an electromagnetic part and effectively recovering the discharged energy. CONSTITUTION:When a switching element 3 is ON, energy stored in a reactor 3 is discharged through a rectifying diode 4 to a smoothing condenser 5 in case that the element 3 becomes OFF. One end of an auxiliary winding n3 provided with a reactor 2 is connected to a snubber capacitor 6, and the other end of the winding n3 is connected to one end of the condenser 5 through a discharging diode 8. When the element 3 is ON, approx. double of voltage variation of the induced voltage is generated in the capacitor 6 by the vibration of half cycle of the leakage reactance and the capacitor 6 in the winding n3, and the capacitor 6 is discharged. The energy discharged from the capacitor 6 and the winding n3 is recovered by the condenser 5.
Patent JP-S52121949-A (JP)
Title: Method and apparatus for cooling room temperature
Inventor: YAMAZAKI TOSHIHIKO
IPC: F24F5/00
Filed: 1976-04-05
Abstract: PURPOSE: When the temperature in a greenhouse is raised above a temperature that is best suited for the growth of the plants in the greenhouse, a liquid having a boiling point lower than 0 degree centigrade is sprayed and evaporated to cool the temperature in the greenhouse. 
     COPYRIGHT: (C)1977,JPO&Japio
Patent JP-2000234917-A (JP)
Title: Surface defect inspecting device
Inventor: KAMATA TERUMI
IPC: G01B11/30
Filed: 1999-02-17
Abstract: PROBLEM TO BE SOLVED: To provide a surface defect inspecting device which is stable in detecting ability and easy for maintenance. SOLUTION: A linear light from a line light source 11 is irradiated on the surface of a rotating cylindrical object 12 which is to be inspected, and the defect on the surface of the object 12 is detected from the change in the image signal photoelectric-converted by a line sensor 13 which receives the light reflected on the surface of the object 12. Here, a moving means which moves the line sensor 13 in the direction vertical to the rotational axis of the object 12 is provided.
Patent JP-S58156232-A (JP)
Title: Am/fm radio receiver
Inventor: IENAKA MASANORI
IPC: H04B1/16
Filed: 1982-03-12
Abstract: PURPOSE:To eliminate a changeover switch for paths of AM/FM signals, by making use of the characteristics of a ceramic filter. CONSTITUTION:For the characteristics of ceramic filters CFA and CFB, the CFA for FM waves functions as a capacitor of about 20PFD to a 455kHz AM intermediate frequency. While the CFB for AM waves functions as a capacitor of about 200PFD to a 10.7Hz FM intermediate freqyency. Therefore a circuit shown in the figure (A) has constitution shown in the figure (B) when it receives FM waves and then constitution shown in the figure (C) during reception of AM waves, respectively. Then a resistance R1 is provided between the output terminal of the CFB and a terminal No.3 to eliminate a switch.
Patent JP-H11225068-A (JP)
Title: Signal generator
Inventor: OHIRA KAZUHIDE
IPC: H03D7/16
Filed: 1998-02-04
Abstract: PROBLEM TO BE SOLVED: To provide a signal generator where the impedance after a mixer is unchanged even when an output terminal connects directly to the mixer for receiving an output of a voltage controlled oscillator VCO as one input signal. SOLUTION: A signal generator 5 is provided with a voltage controlled oscillator 2 that gives either of two input signals to a frequency mixer circuit 1 that provides an output of a signal with a frequency being a difference between or a sum of both the signals, an attenuation circuit 6 placed between the voltage controlled oscillator 2 and the frequency mixer circuit 1 and attenuates an output signal of the voltage controlled oscillator, and a filter circuit 7 that limits a frequency band of the output signal of the attenuation circuit.
Patent JP-S60182731-A (JP)
Title: Semiconductor device
Inventor: KAWAGUCHI TAMOTSU
IPC: H01L25/065
Filed: 1984-02-29
Abstract: PURPOSE:To improve area efficiency by bringing the size of a semiconductor chip on the upper side to a slightly small size and each connecting a semiconductor chip on the lower side to a conductor through wireless bonding and the upper side chip to it through wire bonding in two kinds of the semiconductor chips, the backs thereof are fixed mutually. CONSTITUTION:When the backs of semiconductor chips 14' and 16' of two kinds are fixed mutually by using adhesives 15, the size of the upper chip 16' is previously made slightly larger than that of the lower chip 14'. When the lower chip 14' is connected to split conductors 12 formed on the surface of a substrate 11, solder bumps 13 are shaped at both ends of the lower surface of the chip 14', and the bumps 13 are each fixed to the conductors 12 through a face down. Metallic wires 17 are used in the chip 16', and the chip 16' is connected to several conductor 12 through a face up. Accordingly, a semiconductor device with a large number of connecting conductors is obtained without magnifying the size of the chips.
Patent JP-H05242727-A (JP)
Title: Manufacture of alumina substrate
Inventor: MAKIO KEIZOU
IPC: H01B3/00
Filed: 1992-02-25
Abstract: PURPOSE:To provide a method capable of manufacturing a high-purity alumina substrate which excels in dimensional accuracy and is small in warp and surface roughness. CONSTITUTION:Polyvinyl alcohol is dissolved into water and then added to the mixture of alumina powder, water and a dispersing agent and after that, atomized and dried to obtain granular powder. An additive agent is added, as required, to the granular powder, water and water-soluble organic binder to be kneaded and then molded by extruding. After that, the gained moldings are baked.
Patent JP-S51113933-A (JP)
Title: Obstacle detecting device during running operations
Inventor: MARUYAMA MASATO
IPC: B60R19/02
Filed: 1975-03-28
Abstract: PURPOSE: To provide an obstacle detecting device which can require no large extension of a bumper and which can reduce the radius of gyration of a vehicle. 
     COPYRIGHT: (C)1976,JPO&Japio
Patent JP-S6290808-A (JP)
Title: Dielectric material and manufacture of the same
Inventor: DANIERU DEI JIYONSON
IPC: H01B3/00
Filed: 1986-02-21
Abstract: Dielectric materials having low dielectric constant are provided, the materials comprising fabrics impregnated with theremosetting resins, at least a portion of the fibers in the fabrics being fluorocarbon fibers. Also provided is a method of manufacture of these dielectric materials. The dielectric materials are useful in the fabrication of multilayer printed circuit boards.
Patent JP-H05244763-A (JP)
Title: Gate driving device
Inventor: YOSHIKAWA HARUKI
IPC: H02M1/06
Filed: 1992-02-26
Abstract: PURPOSE:To obtain a gate driving device which can eliminate the erroneous ignition of a GTO thyrisfor by providing a means which prevents the erroneous ignition caused by the displacement current of a power semiconductor element during the nonoperating period of a turning-on driving means. CONSTITUTION:A voltage detector 9-1 detects the voltage across a turning-on resistor 8 of a driving device and, when the output value 9a of the detector 9-1 exceeds a set value VS given to a comparator 10-1, the comparator 10-1 outputs an 'H' signal 10a and an OR circuit 11 ORs the outputs of an AND circuit 14 and a turning-off transistor base signal circuit 15 and outputs an output which becomes the base signal of a turning-off transistor 6. Only when the voltage across the anode A and cathode K of a GTO thyristor 1 abruptly changes while the thyristor 1 is in a turned-off state and a gate voltage tends to turn to the forward direction due to a displacement current, the transistor 6 is again turned on so that the section between the gate G and cathode K of the thyristor 1 can be surely biased in the reverse direction and no erroneous ignition can occur.
Patent JP-S63206182-A (JP)
Title: Microcomputer
Inventor: KOYAMA HIROSHI
IPC: H02P29/00
Filed: 1987-02-20
Abstract: PURPOSE:To reduce the burden of a CPU, by counting rotary pulse with a pulse counter, and by applying signal to the CPU when this counted value coincides with a set value. CONSTITUTION:First, a CPU8 loads a rotational frequency setting register 5 with the number of pulses required for a pulse motor 1. After that, the CPU8 controls the rotational direction and the rotational speed of the pulse motor 1. When the pulse motor 1 is rotated, the output of two-phase signal is generated from an encoder 2. The two-phase signal is supplied to a phase controlling circuit 3 which, in turn, determines the rotational direction of the pulse motor 1 and supplies the output of rotary pulse to an incremental/decremental counter 4. From a comparator circuit 6 sends a signal to the CPU8 when the set value of the rotational frequency setting register 5 coincides with the output of the incremental/decremental counter 4. As a result, following rotation is controlled by the CPU8.
Patent JP-H08235691-A (JP)
Title: Method for recording data on control track
Inventor: SAKAKIBARA YOSHIO
IPC: G11B27/032
Filed: 1995-02-27
Abstract: PURPOSE: To synchronize color frames to each other in a short time at the time of reproduction by detecting the phases of the color frames one frame by one frame. CONSTITUTION: A reference signal generating section 12 generates a reference rotation signal 105 from a synchronizing signal 103 separated from recorded video signals 101 by means of a synchronizing separation section 11. The rotation of a cylinder 3 mounted with rotary heads 2a and 2b is controlled synchronously to the signal 105 by means of a cylinder servo section 4 and a capstan motor 6 is controlled to a prescribed rotating speed by means of a capstan servo section 5. An encoder 14 generates recording CTL signals having different duty patterns one frame by one frame in each color frame based on the signals 105 and 104 and supplies the CTL signals to a CTL head 10 through a switch 16. While a tape 1 is fed by means of a capstan 7, signals are recorded on the tape 1 by means of the heads 2a and 2b and 10.
Patent JP-S63206139-A (JP)
Title: Capacitor induction motor
Inventor: TAKAMATSU JUNICHI
IPC: H02K17/08
Filed: 1987-02-20
Abstract: PURPOSE:To suppress an electromagnetic noise in a capacitor induction motor by so forming slots that the thickness of a stator core observed on the normal line at the center of a set of coils becomes equal to that of the stator core observed on the normal line at the center of the other set of coils. CONSTITUTION:The thickness tA' of a stator core 1 observed on a normal line A-A is equalized to that tB' of the core 1 observed on a normal line B-B. That is, slots 2 are so formed that x-, y-orthogonal coordinates secured to the core and xsi-, eta-orthogonal coordinates secured to coil groups have a shared origin O and a rotary angle of alpha =pi/8rad, and coils 3, 4 are inserted to the slots 2. Thus, an electromagnetic noise caused by the irregularities in a magnetic distortion and a magnetic attraction force is averaged irrespective of whether normal or reverse rotation to suppress a large electromagnetic noise.
Patent JP-H11228291-A (JP)
Title: Growth of silicon single crystal and quartz glass crucible used therefor
Inventor: MURAKAMI HIRONORI
IPC: C30B15/10
Filed: 1998-02-20
Abstract: PROBLEM TO BE SOLVED: To provide a method for growing a high quality silicon single crystal in good yield while preventing the pulled single crystal from changing into a state having dislocation. SOLUTION: This method for growing a silicon single crystal by bringing a seed crystal into contact with the surface of a silicon molten liquid stored in a quartz glass crucible and pulling the seed crystal to solidify the molten silicon comprises using the quartz glass crucible having <=5 /cm<2> density of crystalline specks formed on the inner surface of the crucible after pulling the single crystal. The quartz glass crucible used for growing the silicon single crystal by bringing the seed crystal into contact with the surface of the silicon molten liquid and pulling the seed crystal to solidify the silicon molten liquid has <=5 /cm<2> density of the crystalline specks formed on the inner surface of the crucible after pulling the single crystal.
Patent JP-H10218937-A (JP)
Title: Production of fine polyvinyl alcohol resin powder
Inventor: NAKAJIMA TAKASHI
IPC: C08F18/08
Filed: 1997-02-07
Abstract: PROBLEM TO BE SOLVED: To obtain a fine polyvinyl alcohol resin powder industrially advantageously in a short time with a relatively simple apparatus by saponifying a polyvinyl acetate resin in a soln. in the presence of fine inert gas bubbles to form a porous saponification product contg. gas bubbles dispersed therein and drying and grinding the product. SOLUTION: A soln. of a polyvinyl acetate resin in a lower alcohol is mixed with an alkaline compd. to saponify the resin. The inert gas is, e.g. nitrogen. Pref., the type of a mixer used, the number of revolutions, the nozzle for supplying the inert gas, etc. are properly selected to disperse microbubbles more finely and homogeneously. The preliminary addition of a compd. [e.g. 2,2-azobis(4- methoxy-2,4-dimethylvaleronitrile)] which generates an inert gas at the temp. of saponification is an alternative method. The porosity of a dried product thus obtd. is pref. 5-30wt.%. The resultant powder has a particle size of 200μm or lower.
Patent JP-H01213836-A (JP)
Title: Optical information recording and reproducing device
Inventor: WATANABE YOSHIHIKO
IPC: G11B7/085
Filed: 1988-02-23
Abstract: PURPOSE:To executing tracking leading-in operation in a condition that an optical system to irradiates a light beam to an optical information recording medium is held in a prescribed position by providing switching means which are respectively operated in a prescribed way. CONSTITUTION:When SWs 17 and 18 are turned off and an SW16 is turned on, an objective lens 1 is position-controlled and held in a mechanical center by a tracking amplifier 6, a tracking actuator 15, an LED 3, a two-dividing detector 4 and a differential amplifier 5. When an SW19 is turned on in such a condition, the output of a triangle wave generator 13 is added through a focus amplifier 14 to a focus actuator 7 and the lens 1 is moved up and down. Then, a focus search condition is obtained. When the SW19 is turned off and the SW18 is turned on in the position of a focus point, the lens 1 is held in the mechanical center. Here, when the SW16 is turned off and the SW17 is turned on, a tracking servo goes to a turning-on condition in the mechanical center.
Patent JP-S60183812-A (JP)
Title: Pushbutton tuner
Inventor: OOHASHI TAMAKI
IPC: H03J5/12
Filed: 1984-03-02
Abstract: PURPOSE:To decrease remarkably the depth dimensions of the entire tuner so as to attain miniaturization by providing plural tuning elements setting respectively a reception range different in one reception band and connected to a variable tuning section, selecting the tuning element when the channel selection member corresponding to each reception range is operated and connecting it to the variable tuning section. CONSTITUTION:In depressing the operating member 1 of channel selection devices A1 and A2, a plate 42 is moved laterally in an inactivating direction, a switch 50 is changed over, a reception circuit of a high region comprising a variable element 37a, a turning element 54, a capacitor 52 and varactor diode 53 is constituted, and then the channel members 18, 18' select respectively a station belonging to a high frequency and in turning the operating member 1, a station belonging to the high frequency is preset to the channel selection members 18, 18'. That is, in taking the effective moving stroke of the channel selection collors 24, 24' in the channel selection members 18, 18' as (l), all the effective moving stroke (l) of the channel selection collors of the channel selection device A3 is used for the reception range of a low frequency and used for selecting the reception the reception range of high frequency in the channel selection devices A1, A2.
Patent JP-S58155152-A (JP)
Title: Profiled machining equipment
Inventor: YAMAZAKI ETSUO
IPC: B23Q33/00
Filed: 1982-03-11
Abstract: PURPOSE:To enable automatic exchange of cutters at a proper timing by providing a cutter change means which changes the cutters when the movement of a machine reaches a specified value as determined based on the detection results  of a position detector. CONSTITUTION:As the movement of a cutter 23 exceeds a specified value, a command of a controller 1 stops the operation of a profiling computation circuit 11. Detection results (efg) of position detectors 15-17 are memoriezed into a memory 12. The controller 1 determines the movement in the direction of X, Y or Z axis required for arranging the cutter 23 at a specified position within an automatic cutter changing mechanism 18 on a machining table 25. A finishing signal is applied to the controller 1 when it is detected that a cutter head 22 moves by a movement value as designated based on detection results (efg) of the detectors 15-17. The controller 1 applies a cutter change command (d) to an automatic cutter change mechanism 18 through an output unit 4 to change cutters.
Patent JP-H01213839-A (JP)
Title: Optical pick-up and information recording and reproducing device with optical pick-up
Inventor: YOKOYAMA OSAMU
IPC: G11B7/125
Filed: 1988-02-22
Abstract: PURPOSE:To obtain a necessary optical spot even when the oscillating wavelength of a semiconductor laser is dislocated from a designing wavelength by changing the wavelength of a light from the semiconductor laser so as to coincide with a reference wavelength. CONSTITUTION:A wavelength divider 112 is designed so that the wave guiding light of the same wavelength as the designing wavelength of a condensing grating coupler 107 can be converged to one point 113 in an optical wave guiding layer 103 when the wave guiding light is incoming. When the design is executed so that the condensing point 113 can go to the dividing center of two-dividing photo-diodes 114a and 114b, in case that a semiconductor layer 104 is oscillated with the same wavelength as the designing wavelength, a differential output 117 of the two-dividing photo-diode goes to be zero. On the other hand, when the semiconductor layer is not oscillated as the design, the differential output 117 does not go to be zero. When the oscillating output of the laser 104 is changed and matched to the designing wavelength by an oscillating wavelength control means 118 so that this differential output 117 can go to be zero, aberration is not generated in an optical spot 108 which is made by the coupler 107.
Patent JP-H01212519-A (JP)
Title: Rice cooker
Inventor: SUZUKI TOSHIAKI
IPC: A47J27/00
Filed: 1988-02-22
Abstract: PURPOSE:To enable display of a remaining time of cooking finish according to a rice cooking amount, by providing a rice cooking time deciding means to decide a time required for rice cooking from a weight output from a detecting means for the weight of an inner pot and a subtracting means to subtract a rice cooking time from a time required for rice cooking. CONSTITUTION:An inner pot 10 in which washed rice and water are placed is contained in a body 1, A heater 4 and a temperature sensor 8 are situated on the bottom surface of the inner pot 10. A spring 5 is compressed by means of the weight of the inner pot 10, a weight is detected from a volume between upper and lower electrodes 6 and 7 by means of a weight detecting means 17 to input it to a control part 15. A menu switch 16 is operated to select a proper heating program matching each menu by means of the program of a microcomputer. A rice cooking switch is operated, and according to the proper heating program suitable for a menu, a heater 4 is energized. From a menu selected by a menu selecting means 14 and a weight detected by a weight detecting means 17, a rice cooking time is corrected by a temperature sensor 8 by means of a deciding means 11 for a time required for rice cooking, and subtraction by a subtraction means 13 is displaced on a display means 12 to decide a rice cooking time.
Patent JP-H04258730-A (JP)
Title: Diaphragm type converter
Inventor: OIKAWA HIROYUKI
IPC: G01L13/06
Filed: 1991-02-12
Abstract: PURPOSE:To surely prevent the intrusion of moisture into a strain gauge and detect the pressure and load free from the influence of the variation of the outside air pressure, with the small-sized, simple, and inexpensive constitution, without using a special sealing structure such as airtight terminal, bellows, etc. CONSTITUTION:A strain gauge 105, flat cable 119, flexible substrate 118, resistor 117, etc., in a wiring chamber R are molded by a gel substance which possesses high moistureproofness and pressure transmission performance. Accordingly, moisture does not reach the non pressure receiving surface of a diaphragm 102, and only the outside air reaches, and the outside air pressure acts. While, on the pressure receiving surface of the diaphram 102, the measured pressure including the outside air pressure acts through a pressure introducing 101a. Accordingly, a strain (deformation) corresponding to the measured pressure after the cancellation of the outside air pressure is generated on the diaphram 102, since the outside air pressure component acts on both the surfaces.
Patent JP-S60183054-A (JP)
Title: Cyclone type classifier
Inventor: FUKUI HARUO
IPC: B04C5/16
Filed: 1984-02-29
Abstract: PURPOSE:To make a classification ratio variable and to attain to make an apparatus compact, by arranging a movable buffle in an outer cylinder. CONSTITUTION:When air containing product coarse particles and fine particles is sent into a blower from a charging port 11, said air is fallen while revolved in the passage 25 between an outer cylinder 10 and an inner cylinder 15 and coarse particles are fallen through a passage 26 while fine particles or froth are raised through the inner cylinder 15 to be discharged to the open air through an exhaust port 19 and a filter. The coarse particles are flowed along the inner surface of the outer cylinder by the action of centrifugal force during the revolution in the passage 25 and fallen by the action of gravity while fine particles or froth are collected to the central side and classified. When a buffle 13 is raised by operating a nut 21, the cross-sectional area of the passage 26 is reduced and the fine mesh particles in the coarse particles are flowed to the side of the exhaust port 19 along with fine particles and a classification ratio is changed.