Sanyo Electric Co., Ltd.

Nippon Hoso' Kyokai

Makoto Yamada

Kazuyoshi Tsukamoto

Hiroshi Kutsuyama

Hironosuke Ikeda

Hiroshi Watanabe

Toshiaki Hioki

Hideaki Aoki

Minoru Yasuda

Masaru Yamano

Nobuyoshi Nishizawa

Osamu Tajima

Kazushige Kakutani

Keiji Kishimoto

Ichiro Takahara

Seiji Murakami

Kazuo Ito

Hideo Hagino

Tateo Toyama

Haruo Isono

Toshiyuki Kudo

Masahiro Maekawa

Yoshihiko Morita

Fumio Yasutomi

Daizo Takaoka

Naoto Tojo

Yoshiya Yamaue

Seigou Torita

Yoshinosuke Nagata

Charging system for motor-driven vehicle

Stereoscopic video disc record and recording and reproducing apparatus

A vehicle which is capable of recognizing shapes in a predetermined area, comprising: a plurality of ultrasonic sensors, an encoder, map drawing means for sequentially and continuously drawing a map of the prescribed area determined by information received from the encoder and ultrasonic sensors, memory means for storing the map drawn by the map drawing means and control means for instructing rectilinear movement, starting stopping and turning of the vehicle so as to move in a serpentine fashion, wherein the ultrasonic sensors, encoder and map drawing means are operated by the control means, the memory means writes and stores a history of its own movements in the area and as information is received remembers detected information from the encoder, and a change of direction of the vehicle which is instructed by the control means is determined by information on the map as well as the areas through which the vehicle has previously passed.

Vehicle

A controller for a fuel cell power system comprises a main switching element inserted between a fuel cell power unit and a dc-ac converter, a secondary battery connected to a charging switching element and a discharging switching element, and a control circuit for switching elements, the charging switching element and discharging switching element being connected in series and across the main switching element. The secondary battery is charged by turning on the charging switching element when the fuel cell power unit is in warming up operation or when the dc-ac converter is broken off from the output circuit of the power unit to stop the operation of the fuel cell power unit, while the battery is discharged through the dc-ac converter by turning on the discharging switching element when the fuel cell power unit reaches the rated operating temperature.

Controller for fuel cell power system

A temperature control system for a fuel cell powerplant comprising two or more fuel cell stacks to which cooling gas and process gases are separately supplied, that comprises temperature detectors each being arranged in a fuel cell stack; stack dampers each being arranged in each of inlet or outlet branched pipelines of a circulating pipeline for cooling gas; means for calculating the average value of operating temperatures of all the cell stacks detected by said temperature detectors, a difference between the average value and each detected temperature of the cell stacks, and a difference between the average value and a predetermined value of the operating temperature of the fuel cell stacks; a driver for actuating each stack damper in response to the difference between the average value and the detected temperature of each cell stack, and means for controlling the flow rate and/or the temperature of the cooling gas fed to all the cell stacks in response to the difference between the average value and the predetermined value of the operating temperature.

Temperature control system for fuel cell powerplant

A preset tuning apparatus adapted for selecting a preset channel among a plurality of channels, comprising a tuner including a tuning circuit including a voltage controlled variable capacitance diode, a manually adjustable tuning voltage generator for providing a tuning voltage to the voltage controlled variable capacitance diode, a non-volatile analog storage including a plurality of floating gate type field effect memory devices, a band selection switch, a preset selection switch, a preset memory switch, addressing circuits coupled to the band selection and preset selection switches for addressing a corresponding one of the plurality of memory devices, an erase/write/read voltage generator, and a mode control coupled to the erase/write/read voltage generator and responsive to the band selection, preset selection and preset memory switches for alternately and repetitively writing and reading the analog value in the addressed memory device until the data corresponding to the tuning voltage of the tuning voltage generator is written in the memory device in the write and read modes and for reading thereafter the data in the memory device for providing the same as a tuning voltage to the voltage controlled variable capacitance diode in the preset mode, whereby the preset selection is achieved based on the data as written in and read out from the addressed memory device. Preferably, the data concerning the tuning voltage is divided into a rough tuning voltage and a fine tuning voltage, which are separately stored in separate memory devices. Preferably, the read tuning voltage is once stored in a buffer memory and the tuning voltage in the buffer memory is corrected responsive to an automatic frequency control signal.

Preset tuning apparatus using floating gate type field effect device

An electrolytic corrosion measuring apparatus comprising a first terminal to be connected to an electric conductor, such as a rail of electric railways, water pipe, gas pipe, telephone cable, power cable or the like, installed in electrical contact with the earth and a second terminal to be connected to an earthed reference electrode; a solid state electrochemical potential memory device which exhibits a terminal voltage between an anode and a cathode linearly changing as a function of the charging or discharging quantity of electricity fed to the device and which is capable of holding the terminal voltage, said device being connected to the terminals to receive an input therefrom; an amplifier for amplifying the terminal voltage of the device; and a meter for displaying the output of the amplifier. A preferred embodiment of the present invention comprises two sets of such memory device, amplifier and meter: one being for a positive going component of the input and the other for a negative component. The value indicated by the meter is associated with an amount of electrolytic corrosion occurring in the conductor during a time period when the apparatus is connected to the conductor and the earth, and thus affords a qualitative measurement indication of the amount of electrolytic corrosion so occurring.

Apparatus for measuring stray current electrolytic corrosion

A stylus grinding device for use in a video disc player comprises a rotary grinding disc adapted to be rotated at its center during a grinding operation subject to the pickup stylus. The stylus grinding device is designed such that the amount of the pickup stylus to be ground varies depending upon the duration of actual service performed by the pickup stylus to reproduce video information recorded on a flexible foil-type disc record.

Stylus grinding device for video disc player

Growing community of inventors

Katano, Japan

Makoto Yamada