General Electric Company

Mahomed Hanif Girach

Vito J Arsena

Curtis E Scott

Frederick Hetzel

Joseph C Oberle

Spiro Vamvakas

Timothy A Taubert

David O Wharmby

Robert S McFeely

Steven John Everest

A coil assembly for an electrodeless fluorescent lamp comprises a hollow ferrite core 30, and a coil 31. The core is retained on a base 32 by a coil former 34 surrounding the core. The core 30 is retained in the former 34 by a circlip 33 or projections. The coil 31 is wound on the former. Pins 36 to which the coil is soldered connect the coil to an energizing circuit.

Coil assembly for an electrodeless fluorescent lamp

To retain a discharge vessel 1, a groove 12 is formed in a re-entrant portion 3 of the vessel. The grooves 12 engages a corresponding notch 13 in a coil former of a coil assembly 6, housed in the re-entrant. The coil former is sufficiently resilient to be deflected by the groove as the vessel 1 is pushed onto the former. The arrangement may have means to prevent the vessel rotating about the coil assembly.

Electrodeless fluorescent lamp

An electrodeless fluorescent lamp includes a glass envelope at least a portion of the outer surface of the glass envelope, being coated with an electrically conductive layer, and a housing made of metal which makes electrical contact with the electrically conductive layer, the bulb and housing being covered at least partially by a one-piece insulating sleeve.

Electrodeless fluorescent lamp with one-piece electrically insulative

An electrodeless, low pressure gas discharge lamp includes a vitreous envelope containing a discharge medium and being shaped with an external chamber for receiving an electrical excitation circuit. The excitation circuit is effective for exciting the discharge medium to emit light with electromagnetic fields that are generated by the excitation circuit. A circuit is included for supplying electrical power from power mains to the excitation circuit. A transparent, electrically conductive coating is provided atop the vitreous envelope and is electrically connected substantially directly to one of the power mains at any given time. A transparent, electrically insulative coating is disposed atop the electrically conductive coating, and comprises a contiguous, inorganic glass layer. The insulative coating preferably has a minimum coating thickness of at least about 3.1 microns.

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Leicester, United Kingdom

Mahomed Hanif Girach