Tokyo Shibaura Denki Kabushiki Kaisha

Toshiba Lighting & Technology Corporation

Kimio Osada

Taketo Kamei

Motokazu Hayashi

Yoshio Kojima

Takeo Yasuda

Masumi Nanba

Nobuhiro Umehara

Mitsutoshi Kimura

In a fluorescent lamp, a curved discharge path is constituted by a plurality of bulbs and a cap interconnecting end portions of the bulbs. Terminal electrodes are provided at end portions of the bulbs, which are situated at both ends of the discharge path. An intermediate electrode is arranged within the cap. A voltage is applied selectively between the intermediate electrode and the terminal electrodes, thereby selectively enabling the bulbs to emit light. The bulbs may have apertures having different widths and positions. Different types of phosphor layers may be formed on the inner surfaces of the bulbs, thereby selectively emitting light of different wavelengths.

Tubular fluorescent lamp with intermediate electrode

A fluorescent lamp device according to the present invention includes a ballast, a screw base electrically connected to the ballast, a fluorescent tube curved in an arc at three portions thereof, a bowl-shaped member for housing the ballast with the screw base fixed projecting outside therefrom, a globe, and a partition plate attached to an open end of the member so as to thermally isolate or insulate the ballast from the fluorescent tube and to which the fluorescent tube is fixed. The bowl-shaped member is provided with a plurality of ventilating slits for discharging heat radiated from the ballast, and also with air-ducts for communicating the space inside the globe with the outside air. The globe is also provided with holes at the top portion thereof.

Fluorescent lamp having separate cooling means for ballast and

A compact fluorescent lamp having a chassis member including a cylindrical part including a generally cylindrical thread portion and a cylindrical straight portion. A longitudinal recess is provided on the outside of the cylindrical part. The chassis member also includes a holding plate and a maintaining plate including an edge wall member and projections having notches. A screw base is secured to the thread portions of the cylindrical part and a base member is attached to the cylindrical part. A winding envelope formed by bending a straight tube twice into U-shapes and a ballast are respectively mounted to the maintaining plate and the holding plate, and a globe member is attached to the base member.

Compact fluorescent lamp

Disclosed is a compact fluorescent lamp having a chassis member consisting of a cylindrical part and a holder member, a screw base screwed to the cylindrical part, a base member attached to the cylindrical part, a winding envelope formed by bending a straight tube twice into U-shapes, a ballast mounted to the holder member of the chassis member and a globe member attached to the base member.

A compact fluorescent lamp having a chassis member, a screw base screwed to the chassis member, a base member secured to the chassis member, a winding envelope having bent part and both ends oriented to the same direction, a ballast surrounded by the winding envelope and a globe member attached to the base member. The ballast is disposed between the bent part and the ends of the winding envelope so as to provide the winding envelope with a desirable coolest wall temperature.

Growing community of inventors

Yokosuka, Japan

Kimio Osada