Patents by Inventor Tadao Sasaki
Tadao Sasaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7858022Abstract: A crucible-type continuous melting furnace includes a preheating tower for storing the material to be melted, and an exhaust port on the top thereof; a melting crucible furnace disposed below the preheating tower and having a melting crucible to which the material to be melted is supplied from the preheating tower; a heating burner for heating the melting crucible; and a preheating burner for preheating the material to be melted and disposed in a position that is higher than the heating burner; the melting crucible furnace having an introduction portion for introducing a combustion gas from the heating burner into the preheating tower; and the melting crucible having a molten metal outlet on the side wall for discharging the molten metal obtained by melting the material.Type: GrantFiled: June 8, 2006Date of Patent: December 28, 2010Assignee: Nippon Crucible Co., Ltd.Inventors: Tamio Okada, Tadao Sasaki, Katsuyuki Shirakawa, Ryouichi Kishida, Shinnosuke Takeuchi
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Publication number: 20090130619Abstract: The present invention provides a crucible-type continuous melting furnace by which the melted amount of the material can be readily controlled. A crucible-type continuous melting furnace 1 includes a preheating tower 31 for storing the material to be melted (a), and an exhaust port 34 on the top thereof; a melting crucible furnace 11 disposed below the preheating tower 31 and having a melting crucible 71 to which the material to be melted (a) is supplied from the preheating tower 31; a heating burner 3 for heating the melting crucible 71; and a preheating burner 4 for preheating the material to be melted and disposed in a position that is higher than the heating burner 3; the melting crucible furnace 11 having an introduction portion for introducing a combustion gas from the heating burner 3 into the preheating tower 31; and the melting crucible 71 having a molten metal outlet 74 on the side wall for discharging the molten metal (b) obtained by melting the material (a).Type: ApplicationFiled: June 8, 2006Publication date: May 21, 2009Applicant: NIPPON CRUCIBLE CO., LTD.Inventors: Tamio Okada, Tadao Sasaki, Katsuyuki Shirakawa, Ryouichi Kishida, Shinnosuke Takeuchi
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Publication number: 20070289508Abstract: A heat-treatment apparatus having a combustion chamber (13), an apparatus main body (10) provided with said combustion chamber (13), a combustion burner (20) for supplying a heating gas to said combustion chamber (13), a flue for discharging a combustion gas generated in said combustion chamber (13) to the outside, and a heating vessel stored in said combustion chamber (13), said heating vessel (15) having a bottom and an opening on the top, said opening being opened and closed by a lid (16), and said heating vessel being provided with a communicating member (153) that is communicably open to the above said combustion chamber when said lid is closed. This heat-treatment apparatus can keep the emission gas generated during the treatment, and, waste valuable metals can be efficiently recovered, if contained.Type: ApplicationFiled: September 1, 2005Publication date: December 20, 2007Inventors: Tamio Okada, Hiroshi Shigemitsu, Tadao Sasaki, Hideo Yoshikawa, Katsuyuki Sherakawa, Ryouichi Kishida, Shinnosuke Takeuchi, Shigeru Osuga, Fumiaki Osawa
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Patent number: 7299150Abstract: In an ultrasonic flow meter for measuring a flow rate of a fluid flowing through a conduit by detecting a propagating time difference between a forward propagating time of an ultrasonic wave propagating within the conduit in a forward direction and a backward propagating time of an ultrasonic wave propagating within the conduit in a backward direction, forward and backward ultrasonic wave signals generated by ultrasonic vibrating elements are sampled to derive forward and backward digital data series x and y, which are stored in a memory, the forward and backward digital data series x and y are read out of the first and second memory units and total sums of absolute difference values between the forward and backward digital data series x and y are calculated, while data positions of these backward and forward digital data series x and y are relatively shifted, a shift amount of data positions at which a total sum of absolute difference values becomes minimum is detected, an ultrasonic propagating time differeType: GrantFiled: November 2, 2006Date of Patent: November 20, 2007Assignee: Tokyo Keiso Co., Ltd.Inventors: Tokio Sugi, Tadao Sasaki
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Publication number: 20070255514Abstract: In an ultrasonic flow meter for measuring a flow rate of a fluid flowing through a conduit by detecting a propagating time difference between a forward propagating time of an ultrasonic wave propagating within the conduit in a forward direction and a backward propagating time of an ultrasonic wave propagating within the conduit in a backward direction, forward and backward ultrasonic wave signals generated by ultrasonic vibrating elements are sampled to derive forward and backward digital data series x and y, which are stored in a memory, the forward and backward digital data series x and y are read out of the first and second memory units and total sums of absolute difference values between the forward and backward digital data series x and y are calculated, while data positions of these backward and forward digital data series x and y are relatively shifted, a shift amount of data positions at which a total sum of absolute difference values becomes minimum is detected, an ultrasonic propagating time differeType: ApplicationFiled: November 2, 2006Publication date: November 1, 2007Applicant: TOKYO KEISO CO., LTDInventors: Tokio Sugi, Tadao Sasaki
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Patent number: 5757572Abstract: In a reproducing apparatus having the capability of reproducing data in both directions from a recording medium in the form of a tape, when a program recorded on the recording medium in the form of a tape is accessed in a high speed mode, a fast forward tape travel operation or a fast reverse tape travel operation is performed while monitoring the program number recorded in the area opposite to the current reproducing position, and the searching speed is controlled when the searching position reaches a location near a reverse position so that the searching position does not go beyond the reverse position. A recording apparatus operates to record a program number on a recording medium in the form of a tape on the basis of the program number which was recorded at the end of the previous recording operation so that a correct value is given as the program number to the current recording operation.Type: GrantFiled: November 15, 1995Date of Patent: May 26, 1998Assignee: Sony CorporationInventor: Tadao Sasaki
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Patent number: 5747400Abstract: A colored refractory material for lining an instrument/apparatus used at a high temperature is formed by mixing a powder of a raw material containing ceramics with a coloring agent and kneading with a liquid using a binder. The refractory material is put in lining for a portion being in contact with a high temperature molten substance or being exposed to a high temperature atmosphere, and is dried by heating while adjusting a temperature and a heating time on the basis of color change on the surface of the refractory material.Type: GrantFiled: July 16, 1996Date of Patent: May 5, 1998Assignee: Nippon Crucible Co., LtdInventors: Tadao Sasaki, Hideaki Ohashi, Akio Ueda, Norio Honda, Hiroyuki Suzuki
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Patent number: 5459520Abstract: A method and apparatus for processing image data produced by an electronic camera (such as image data read from a CCD device of an electronic camera) by over-sampling and then interpolating the data to convert the format and/or resolution of the data. The format of the image data may be converted to a format suitable for display on a computer monitor or the like. The invention enables the aspect ratio of a frame of image data output from a CCD device to be converted to 1:1. Preferably, the image data are filtered by a filter having a characteristic opposite to the frequency characteristic of the interpolation function, and then interpolated so that the interpolation can be carried out at a portion where the change of the frequency characteristic is small, thereby improving the image quality of the fully processed output image.Type: GrantFiled: December 6, 1993Date of Patent: October 17, 1995Assignee: Sony CorporationInventor: Tadao Sasaki
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Patent number: 5414464Abstract: An electronic still camera wherein an image compression circuit can be simplified includes a lens system, a shutter, an image sensor and a processing circuit. A video signal for one frame outputted from the processing circuit in response to a shutter operation is written into a memory. A video signal read out from the memory is compressed in accordance with the JPEG system by an image compression circuit and then written into a memory card. The image sensor is constituted from an image pickup section and a product sum calculation section. A CMD image sensor capable of non-destructively reading out a picture signal is used as the image pickup section. The product sum calculation section performs DCT processing required for compression processing of the JPEG system. Since a detected image signal processed by DCT processing is obtained from the image sensor, DCT processing of the image compression circuit is unnecessary.Type: GrantFiled: April 5, 1994Date of Patent: May 9, 1995Assignee: Sony CorporationInventor: Tadao Sasaki
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Patent number: 5251076Abstract: A magnetic recording apparatus for electrocardiographs wherein an input signal is converted into a digital signal, such digital signal is accumulated and intermittently recorded, thereby enabling electric power consumption to be reduced and efficiency of use to be improved. Parallel memories are used to store the digital signal at a first rate and the digital signal is read from the memories at a second rate higher than the first rate.Type: GrantFiled: March 7, 1991Date of Patent: October 5, 1993Assignee: Sony CorporationInventors: Motoharu Hagiwara, Kazumasa Sato, Isao Tamaki, Tadao Sasaki, Yasukazu Sato, Yoichi Hishijima, Mitsuru Harada, Hirokazu Kimura
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Patent number: 5182561Abstract: An integrated A/D converter includes an integrator 8integrating reference signals in synchronism with an integration start signal, and counters for counting integrating clock pulses until the integrated value of the integrator reaches a value corresponding to an input signal, thereby to convert the input signal into a digital or analog signal based on the counts of the counters. An AND gate supplies the integrating clock pulses to the counters only during a predetermined period in synchronism with the integration start signal, so that the integrating clock pulses are supplied to the counters only during an integrating period for the reference signals.Type: GrantFiled: May 22, 1991Date of Patent: January 26, 1993Assignee: Sony CorporationInventor: Tadao Sasaki
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Patent number: 4558349Abstract: A color subcarrier generator used with a system for converting data representing color displays into a composite color video signal suitable for display by a visual display apparatus comprises an oscillator which generates a system clock signal with a predetermined frequency, a frequency divider responsive to the system clock signal from the oscillator which generates horizontal and vertical sync signals for the visual display apparatus and a dot clock signal for timing sequential dots of the horizontal lines of the composite color video signal into which the data is converted and a subcarrier generating circuit which generates a color subcarrier signal to be included in the composite color video signal and which is synchronized in phase with the horizontal sync signal.Type: GrantFiled: December 23, 1982Date of Patent: December 10, 1985Assignee: Sony CorporationInventor: Tadao Sasaki
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Patent number: 4268862Abstract: A synchronizing signal detector for detecting a received television synchronizing signal includes a synchronizing signal separator for separating the synchronizing signal from a received composite television signal. A phase-locked loop is provided, including an adjustable oscillator and a phase comparator for comparing the difference between the output of the synchronizing signal separator and the output of the local oscillator to produce an error signal. A sensor senses this error signal to indicate that the output of the synchronizing signal separator is, in fact, the synchronizing signal, when the error signal is of a predetermined value. In an AFT circuit, the error signal is used to control the tuning condition of the tuning section included in the television receiver. In one embodiment, the tuning section is an electronic tuner whose tuning condition is determined by a digital count.Type: GrantFiled: September 4, 1979Date of Patent: May 19, 1981Assignee: Sony CorporationInventor: Tadao Sasaki
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Patent number: 4224073Abstract: An active silicon carbide powder containing a boron component, which contains the boron component as boron carbide or as a solid solution thereof in a uniformly dispersed state in an amount of about 0.2 to 10 wt %, calculated as boron carbide and a process for producing the same.Type: GrantFiled: August 4, 1978Date of Patent: September 23, 1980Assignee: Nippon Crucible Co., Ltd.Inventors: Tadao Sasaki, Takasi Natori, Isamu Komaru
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Patent number: 4217335Abstract: A process for producing a .beta.-silicon carbide powder is disclosed wherein a ternary mixture of carbon, silicon and silica powders mixed in amounts falling within the region defined by the points O, P, Q and R in the FIGURE are reacted in an oxidizing atmosphere.Type: GrantFiled: June 14, 1979Date of Patent: August 12, 1980Assignee: Nippon Crucible Co., Ltd.Inventors: Tadao Sasaki, Isamu Komaru, Ryuzo Yoshioka
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Patent number: 4194159Abstract: Electronic tuning apparatus comprises an electronic tuner capable of tuning in a plurality of channels within a predetermined frequency range in response to a variable tuning signal, a device for selectively generating a channel selecting signal corresponding to a desired channel from among the plurality of channels, a storage device for storing a number of predetermined tuning values, said number being less than the total number of the plurality of channels and said storage device having an output to which the predetermined tuning values are selectively delivered, an operational processor for generating an actual tuning value for tuning to the desired channel in response to said channel selecting signal and the output of the storage device, and a device which receives the actual tuning value from the operational processor for supplying a corresponding tuning signal to the electronic tuner.Type: GrantFiled: April 18, 1978Date of Patent: March 18, 1980Assignee: Sony CorporationInventor: Tadao Sasaki
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Patent number: 4117096Abstract: A process for producing a powder of .beta.-type silicon carbide, which comprises heating at a temperature of about 800.degree. to about 1,400.degree. C a mixture of a carbon powder having a particle size of about 20 microns or less and a metallic silicon powder with a carbon-to-silicon molar ratio of 1 : 0.6 to 1 : 2 in an oxidizing atmosphere having an oxygen concentration of 0.3 to 35% by volume, thereby to induce a spontaneous continuous reaction between carbon and silicon.Type: GrantFiled: August 18, 1977Date of Patent: September 26, 1978Assignee: Nippon Crucible Co., Ltd.Inventors: Takuo Hosaka, Tadao Sasaki, Hiroshige Suzuki
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Patent number: 3955154Abstract: An oscillator circuit is provided which employs a single active element. In particular, the circuit utilizes a novel four-terminal semiconductor device which is able to act as a transistor with three of its terminals and, in case of use as the transistor, has the emitter-grounded current amplification factor h.sub.FE controllable with a voltage at its fourth terminal. When the novel four-terminal semiconductor device is connected so as to operate as an emitter-grounded transistor, voltage changes at its output terminal, which corresponds to the collector of the transistor, is the same in phase as voltage changes at its fourth terminal. This fact is utilized in the present invention to cause oscillation by the generative feedback from the output terminal to the fourth terminal.Type: GrantFiled: April 25, 1975Date of Patent: May 4, 1976Assignee: Sony CorporationInventors: Tadao Sasaki, Katsuaki Tsurushima