Abstract: This invention relates to aluminum phosphate refractory cement compositions which comprise a mixture of aluminum phosphate containing excess phosphoric acid, relatively small particle size alumina and a mixture of relatively medium and coarse particle size inert filler materials. This cement is useful for cementing tungsten-halogen lamps into glass reflectors. The aluminum phosphate is formed with an excess of phosphoric acid which reacts with the alumina when the cement is baked at elevated temperatures.

Abstract: A multiple flashlamp array is disclosed having a plurality of lamps fired individually and in sequence by means of a plurality of static solid switching devices capable of reliable actuation by radiant energy generated during flashing of the lamps. Initially, these switching devices have a high electrical resistance ("off position") and after being actuated by the heat and light radiation, they undergo chemical conversion to an electrically conductive state ("on position"). The switch devices are prepared in a conventional manner from a particulate mixture of silver oxide with a metal exhibiting both thermal and electrical conductivity but which does not react exothermally with said silver oxide. A binder mixture is used which includes a conventional organic polymer binder which serves as a fuel during conversion of the silver oxide together with a second organic polymer binder which is more resistant to combustion.

Abstract: A multiple flashlamp array is designed having a plurality of lamps fired individually and in sequence and includes a plurality of static solid switching devices capable of being easily activated by radiant energy generated during flashing of the lamps. Initially, the switches have a high resistance ("off" condition) and after being activated by radiation, they undergo chemical conversion to a conductive state ("on" condition). The switches are prepared from compositions which impart improved shelf life under conditions of relatively high humidity at above normal ambient temperatures.

Abstract: A radiation curable ink is provided which is convertible to a conductive coating when cured on the surface of a substrate. A non-ionic surfactant is used in the curable ink in combination with a particulated metal containing conductive filler and an organic resin binder. As a result of using the non-ionic surfactant there was achieved a reduction in the tendency of the curable ink to form two distinct layers based on the separation of the conductive filler from the organic resin binder.

Abstract: A multiple flashlamp array is disclosed having a plurality of lamps fired individually and in sequence which includes a plurality of static solid switching devices capable of being easily activated by radiant energy generated during flashing of the lamps. Initially, the switches have a high resistance ("off position") and after being activated by radiation, they undergo chemical conversion to a conductive state ("on position"). The switches are prepared from compositions which impart improved shelf life under conditions of relatively high humidity at above normal ambient temperatures. The switch material composition comprises a mixture of finely divided cupric oxide with a humidity resistant organic polymer binder.