General Electric Company

Graham M Forsdyke

Stuart A Mucklejohn

Joseph Darryl Michael

Joseph C Borowiec

Zoltan Toth

Steven John Everest

Mahamed H Girach

Alan Thomas Dinsdale

An electrodeless discharge lamp comprises a sealed discharge vessel containing a fill capable of sustaining a discharge when suitably energized, and circuitry for energizing a solenoid to produce an RF electromagnetic field in the vessel to energize the fill. A light transmissive, inherently conductive, polymer layer is provided on the exterior of the discharge vessel for confining the RF field within the lamp. An outer, insulating layer may also be provided over the conductive layer.

Electrodeless discharge lamp

The envelope (6) of a light source is at least partly coated with electrochromic material (20), sandwiched between two conductive layers (21,22). A voltage applied to the electrochromic material by way of the conductive layers varies the intensity and/or color of the light from the source.

Controlling the transmission of light from light sources

Amalgam for use in fluorescent lamps comprising lead, tin, mercury

An electrodeless fluorescent reflector lamp has a discharge vessel containing a fill, a solenoid in a reentrant and indium on the inner wall of the vessel acting as a primary amalgam. A secondary amalgam of indium may be provided on the reentrant. The primary amalgam is preferably under an insulative skirt. The vessel has a light reflective coating on the inner wall under the skirt. The exhaust tube is tipped off at the proximal end of the reentrant or is omitted, the vessel being tipped off at the distal end of the reentrant.

Amalgam Positioning in an electrodeless fluorescent lamp

Growing community of inventors

Leicestershire, United Kingdom

Graham M Forsdyke