Abstract: An electrodeless lamp bulb for producing relatively high radiation output in the deep ultraviolet part of the spectrum when excited with microwave energy wherein the bulb envelope is made of synthetic quartz which is substantially water-free. This results in increased bulb lifetime, since loss of bulb transparency with exposure to deep ultraviolet radiation over time is substantially reduced. An electrodeless lamp incorporating the above-described bulb includes a microwave chamber in which the bulb is situated and means for coupling microwave energy to the chamber.

Abstract: A method and apparatus for cooling electrodeless lamps which permits high power density operation, and bright lamp output. The lamp envelope is rotated about an axis passing therethrough while at least a stream of cooling gas is directed at it. A plurality of such streams may be positioned in or near a plane in which envelope hot spots are found to develop. A spherical lamp envelope at the center of a spherical microwave chamber is effectively cooled by this technique.

Abstract: A method and apparatus for igniting a microwave generated discharge lamp. An ultraviolet-producing means is positioned so as to irradiate the fill-containing envelope of the discharge lamp. The ultraviolet-producing means is excited by microwave energy which is extracted from means which couples microwave energy from the microwave source to the fill-containing envelope of the discharge lamp.

Abstract: An apparatus and method for molding thermosetting material into shaped articles rapidly and without the occurrence of hot spots or other defects. A mold having a cavity conforming to the shape of the article to be molded is provided and is filled with thermosetting material. An energy source generates electromagnetic energy in the microwave range and a coupling means is provided for causing the electric field component of the generated energy to uniformly irradiate the volume of thermosetting material in the mold cavity.

Abstract: A current-reducing device (fuse or switch) is described comprising a foil mber of Al or Mg which is immersed in a fluid with which it will chemically react (such as H.sub.2 O or H.sub.2 O.sub.2) above a certain temperature. The foil member is an electrical conductor but becomes an electrical insulator as a result of the chemical reaction.

Abstract: A method and apparatus for curing three dimensional objects such as cylindrical two piece cans with ultraviolet light without having to rotate the cans, at conventional can line speeds and using a minimum number of lamp units. In a first embodiment, the cans are moved, without rotation, between at least a pair of ultraviolet lamp units so that the closest surfaces to the lamp units are substantially within the focal planes thereof. The lamp units are parallel to the direction of can movement or are rotated from that direction by a small angle with the lamp units of each pair being rotated by the same angle but in opposite senses. In a further embodiment, each lamp unit, instead of being faced by another lamp unit, is faced by a reflector to increase the cure speed attainable with the same number of lamp units.