General Electric Company

J&oacute;zsef T&ouml;k&eacute;s

Istv&aacute;n W&uuml;rsching

S&aacute;ndor Luk&aacute;cs

J&oacute;zsef F&uuml;l&ouml;p

L&aacute;szl&oacute; B&aacute;nkuti

Istv&aacute;n Ker&eacute;nyi

L&aacute;szl&oacute; Ily&eacute;s

This invention concerns a compact fluorescent lamp with a double helix shaped discharge tube in which the two strands of the helix are constituted by two helix shaped tube portions. These tube portions define a central axis of the discharge tube. The double helix formed by the discharge tube has a central section and a first end section. These sections are defined along the central axis, and the lamp base for receiving ends of the tube portions is disposed at the first end section. An inner diameter of the central section of the helix is larger than an inner diameter of the first end section. The invention further relates to a method and apparatus for manufacturing coiled shaped discharge tubes, in particular the above described discharge tube of the discharge lamp. A radially segmented molding core is used for manufacturing the discharge tube. Once the coiling of the discharge tube on the molding core is completed, the segmented molding core is shrunk radially, and then is withdrawn from the coiled discharge tube axially.

Compact fluorescent lamp

A low-pressure discharge lamp with a double spiral shaped discharge tube including two spiral shaped tube portions. The tube portions define a central axis of the discharge tube. A cold chamber portion connects the ends of the spiral shaped tube portions. The cold chamber portion has a first transversal dimension substantially perpendicular to the central axis which is larger than the diameter of the tube portions. The cold chamber portion further has a second transversal dimension substantially parallel to the central axis. The second transversal dimension of the cold chamber portion substantially corresponds to the diameter of the tube portions.

Discharge lamp with spiral shaped discharge tube

A fluorescent lamp comprises a discharge tube disposed substantially in a plane and shaped at least in part to define a substantial portion of the boundary of a zone in the plane. The part of the tube defining the boundary includes at least one straight portion. The discharge tube has a central axis and sealed ends provided with electrodes and at least two tube sections running substantially parallel to each other. Each tube section has at least one blind-sealed end and the tube sections are connected in series through bridges in the vicinity of the blind-sealed ends to define a single continuous discharge space to be excited by electrical power supplied to the electrodes. A lamp support housing is positioned within the zone and the ends of the discharge tube as well as the blind-sealed ends of the tube sections are re-entrant into the zone. The ends of the discharge tube are received in the lamp support housing. The lamp support housing carries means suitable for mechanically and electrically connecting to a socket and include lead-in wires connecting the electrodes directly or through an operating circuit to the means suitable for electrically connecting to a socket.

Growing community of inventors

Budapest, Hungary

József Tökés

Growing community of inventors

Budapest, Hungary

J&oacute;zsef T&ouml;k&eacute;s

József Tökés