Patents Assigned to Tokyo Shibaura Electric Company, Ltd.
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Patent number: 4458313Abstract: A memory access control system selects a program mode to carry out a cycle steal operation in response to a logic "1" condition of a predetermined bit position included in a command and selects a direct memory access mode to effect a direct memory access in response to a logic "0" condition of the predetermined bit position.Type: GrantFiled: November 25, 1981Date of Patent: July 3, 1984Assignee: Tokyo Shibaura Electric Company, Ltd.Inventors: Seigo Suzuki, Seiji Eguchi, Yoshiaki Moriya
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Patent number: 4119861Abstract: A starting apparatus for a gas turbine-generator mounted on an electric motor driven motorcar includes a gas turbine and an A.C. generator with A.C. output terminals coupled directly to the turbine. A rectifier with D.C. output terminals is connected to the A.C. output terminals of the A.C. generator. A battery device is connected to the D.C. output terminals of the rectifier. An inverter has D.C. input terminals connected to the floating battery device in parallel and A.C. output terminals from which an A.C. output is derived. A control circuit is connected to the inverter for controlling the speed of the motorcar. At least one A.C. motor energized by the A.C. output of the inverter for driving the motorcar is provided. A switching device connects the A.C. output terminals of the inverter to the A.C. output terminals of the A.C. generator when the gas turbine is started and connects the A.C. output terminals to the A.C. input terminals of the A.C. motor after the gas turbine is started.Type: GrantFiled: October 15, 1975Date of Patent: October 10, 1978Assignee: Tokyo Shibaura Electric Company, Ltd.Inventor: Choichi Gocho
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Patent number: 4119869Abstract: A constant current circuit including an emitter follower stage consisting of a transistor and a resistance connected in series thereto, an output stage connected in cascade with the emitter follower stage, and two diodes connected in series between the base of the transistor and an external power source, whereby a desired output current which flows through said output stage is obtained by supplying predetermined currents to the diodes and the emitter follower stage respectively.Type: GrantFiled: January 28, 1977Date of Patent: October 10, 1978Assignee: Tokyo Shibaura Electric Company, Ltd.Inventor: Masaru Hashimoto
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Patent number: 4120040Abstract: An electronic calculator using a very small number of operative keys which comprises only four operative keys in all, that is, key for presetting a digit (0 to 9) of any order in a display section, the key for shifting the digit, the key for designating a specified mode from among a plurality of modes of calculating operation and the equal key for providing the result of calculating operation, wherein combination of these keys attains any desired type of function.Type: GrantFiled: November 7, 1977Date of Patent: October 10, 1978Assignee: Tokyo Shibaura Electric Company, Ltd.Inventor: Mitsuo Aihara
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Patent number: 4057747Abstract: In a color cathode ray tube including an electron gun means for projecting three electron beams in an in-line arrangement, there is provided deflection defocus correcting means which are disposed adjacent the side electron beams for neutralizing the deflection defocus of the side beam caused by the non-uniformity of the deflection fields.Type: GrantFiled: October 14, 1975Date of Patent: November 8, 1977Assignee: Tokyo Shibaura Electric Company, Ltd.Inventor: Eizaburo Hamano
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Patent number: 4011576Abstract: A nonvolatile semiconductor memory device of the type known as an insulated gate field effect transistor, in which a thick gate insulating layer overlaps the source and drain regions formed in a substrate. The surface of the substrate underlying the thick gate insulating layer is doped lightly with impurities having opposite conductivity relative to the substrate.Type: GrantFiled: August 25, 1975Date of Patent: March 8, 1977Assignee: Tokyo Shibaura Electric Company, Ltd.Inventors: Yukimasa Uchida, Takeshi Matsuo
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Patent number: 3944886Abstract: A protecting apparatus for a series capacitor in an AC power circuit includes an enclosure filled with a low pressure insulating gas. A discharge gap device, a bypass switch for the series capacitor and an electromagnetic repulsion device for closing the bypass switch in response to the discharge of the series capacitor are assembled in the enclosure in alignment with each other. A metallic cylinder is provided around the assembly forming a return path for the capacitor discharge current to cooperate with the gap device and its support. In this way, the impedance of the capacitor discharge passage can be effectively reduced to permit rapid removal of excess terminal voltage from the series capacitor.Type: GrantFiled: January 24, 1975Date of Patent: March 16, 1976Assignees: Tokyo Electric Power Company, Ltd., Tokyo Shibaura Electric Company, Ltd.Inventors: Yotsuo Ishida, Takeo Okazaki, Hajime Matsumura, Shinichi Menju, Iwao Ohshima
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Patent number: 3934260Abstract: A red light-emitting gallium phosphide device provided with a p-n junction contributing to the emission of light, wherein the maximum concentration of an oxygen donor in a depletion layer surrounding the p-n junction ranges from 1 .times. 10.sup.12 cm.sup.-.sup.3 to 5 .times. 10.sup.14 cm.sup.-.sup.3.Type: GrantFiled: October 10, 1974Date of Patent: January 20, 1976Assignee: Tokyo Shibaura Electric Company, Ltd.Inventors: Akinobu Kasami, Makoto Naito