Matsushita Electric Works, Ltd.

Shoichi Morii

Eiji Shiohama

Takashi Hatai

Shigekazu Kusanagi

Naoki Kumon

Harue Kawagoe

Yoshiyasu Sakaguchi

Masanori Fukui

Kenji Koi

Noriyoshi Nakaoka

Hiroshi Kano

Shin Matsugi

A carbonate spring bath system creates a bath water dissolved with CO.sub.2 gas and supplies the same to a bathtub. The system includes a source of a concentrated CO.sub.2 gas, a circulation path connected to the bathtub and including a booster pump for circulating a bath water from and into the bathtub. CO.sub.2 gas and air supply lines are connected to the circulation path upstream of the pump. The CO.sub.2 gas and air supply lines includes valves which are opened and closed to provide the CO.sub.2 gas and the air at a suitable mixture ratio such that the CO.sub.2 gas and air are forced to dissolve in the pressurized bath water. Disposed downstream of the pump is an accumulator for separating undissolved gas in the bath water and storing in a gas chamber the undissolved gas emanating from the bath water. A recycle line connects the gas chamber to the circulation path upstream of the pump to return the undissolved gas to the circulation path. An exhaust line is connected to the gas chamber for exhausting the undissolved gas outwardly. The recycle and exhaust lines are provided respectively with valves which are controlled to open and close such that the system can selectively operates a recycle mode and an exhaust mode.

Carbonate spring bath system

A DC discharge lamp lighting device includes a main discharge means providing a main discharge-lamp current to a DC discharge lamp including a filament and at least one anode to form between them a discharge path. The main discharge means comprises means for switching an applied voltage between a main discharge starting voltage in synchronism with a luminance control signal and a main discharge maintaining voltage. Any contribution of a current limiting resistance element to power consumption in circuit operation upon lighting of the discharge lamp can be reduced, thereby reducing heat generation.

DC discharge lamp lighting device

Growing community of inventors

Hirakata, Japan

Shoichi Morii