Kabushiki Kaisha Toshiba

Bridgestone Corporation

Tokyo Shibaura Denki Kabushiki Kaisha

Tokyo Shibaura Electric Co., Ltd.

Toshiba Energy Systems & Solutions Corporation

Yuji Komori

Takashi Sato

Keiji Matsumoto

Go Tanaka

Yasuhiro Iino

Masao Hashimoto

Yoshihiro Kojima

According to an embodiment, an emergency core cooling system has: three active safety divisions each including only one motor-driven active safety system; one passive safety division including a passive safety system; an emergency power source disposed in each of the active safety divisions to supply electric power to the motor-driven active safety system; and an advanced passive containment cooling system disposed in the passive safety division. Only two active safety divisions each includes a low pressure flooder system that is commonly used with a residual heat removal system as the only one motor-driven active safety system. The other active safety division includes an air-cooled injection system as the only one motor-driven active safety system.

Emergency core cooling system and boiling water reactor plant using the same

The present invention provides a glass improved in impact resistance, which has excellent impact resistance and penetration resistance. The constitution of the glass consists of a glass plate, an organic resin layer containing ethylene-vinyl acetate copolymer provided thereon, and a film comprising an organic polymer provided on the layer. The organic resin layer may have conductivity and the film may have a hard coat layer thereon.

Glass improved in impact resistance

A synchronizing circuit for a dubbing apparatus which is capable of a dubbing a signal played back from a playback unit to a recording unit in accordance with the operation of a dubbing command key. The synchronizing circuit essentially includes a power source for supplying a driving current, a potential source associated with the dubbing command key for supplying a prescribed potential, first and second devices for setting the playback unit and the recording unit in a playback mode and a recording mode, respectively, first and second circuits for activating the first and second setting device by applying the driving current in response to the reception of the prescribed potential, respectively, and a circuit for delaying the supply of the prescribed potential to one of the first and second activating circuits when the prescribed potential is first applied to the other activating circuit.

Synchronizing circuit for dubbing apparatus

A recording bias oscillating circuit for use in apparatus of the type having at least two independent tape recorder sections. The circuit is provided with at least two recording heads respectively corresponding to the tape recorder sections for recording signals on tapes. The recording heads are supplied with bias signals from independent bias oscillators. The bias oscillators are connected to each other through a coupling device for synchronizing the frequencies of the bias oscillators thereby preventing beat noises caused by a frequency difference between recording bias oscillating signals.

Recording bias oscillating circuit

A temperature-compensated amplifier circuit including an amplifier section having first and second transistors which are connected at their collectors to a power source terminal through first and second resistors, and having d.c. biased bases coupled to signal source terminals; a current source including a third transistor having a collector coupled with the emitters of the first and second transistors and a grounded emitter; a fourth transistor having an emitter coupled with the power source terminal through a third resistor; a fifth transistor connected at the emitter to the power source terminal and at the base to the base of the fourth transistor; a sixth transistor having both base and collector commonly coupled to the collector of the fourth transistor and grounded at the emitter; and a seventh transistor connected at the collector to the base and the collector of the fifth transistor, at the base to the bases of the third and sixth transistors and grounded at the emitter. The emitters of the sixth and seventh transistors are formed so as to have a predetermined area ratio thereby controlling the current in the forth and fifth transistors. The first to third resistors are formed to have substantially equal temperature characteristics.

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Yokohama, Japan

Yuji Komori