Mitsubishi Denki Kabushiki Kaisha

Yokogawa Electric Corporation

Asahi Kogyosha Co., Ltd.

Shigehiro Yoshida

Kazuhiro Yokouchi

Yuichi Wada

Hiroshi Takahashi

Hiromichi Kosaka

Keisuke Tani

Kiyoshi Fukuda

Masao Tomita

At the tip of a marginal land of a wiring board corresponding to a marginal electrode of a QFP is provided a partly projecting area that projects in a direction away from another land. The partly projecting area and the marginal land can be formed simultaneously and in a block by applying solder through a mask (not shown) on which openings are formed in the shape of the partly projecting area.

Wiring board device

The present invention provides a system which comprises primary supply pumps and secondary supply pumps and controls pressurized water supply systems, air-conditioning systems, or the like that supply chilled water or hot water using these pumps. In the present invention, calculation is carried out based on measurement signals obtained by measuring pressure, flow rate, open rate of valves, etc. by providing sensors in supply channels.

Pump control system

Occurrence of mechanical noise and tape damage due to operation of a pinch roller is avoided when the system is switched from the tape playback mode to the radio mode or vice versa. On playback of the tape, an interrupt signal 33 from a microcomputer 34 is low. Transistors 28 and 13 are thus turned on. A drive motor 14 in the tape deck 11 is energized by power from a (+B) terminal 45. When the cassette tape is loaded into the tape deck, a plunger 15 is energized directly by power from a (TAPE+B) terminal 12. Thus, a pinch roller 41 in a head drive mechanism 16 is brought into contact with the tape 43. If the microcomputer 34 detects any interrupt signal such as traffic or emergency information signals multiplexed with FM broadcasting waves, it changes the interrupt signal to high so that the transistors 28 and 13 are turned off. Therefore, the drive motor 14 is de-energized, but the power continues to be supplied to the plunger 15. Consequently, the pinch roller 41 and the tape 43 will be maintained in contact with each other and will not influenced by the switching between the tape and radio modes.

Radio receiver with tape deck having interrupt capability

A high-speed current limiting circuit breaker comprises a self-recovery type current limiting element for limiting a fault current, a parallel resistance connected in parallel with the self-recovery type current limiting element and a circuit breaker connected in series with the self-recovery type current limiting element, a fault voltage detector for detecting the voltage generated on the parallel resistance and thereby driving an electromagnetic repulsion coil for breaking the circuit breaker.

Growing community of inventors

Tokyo, Japan

Shigehiro Yoshida