A

PHOTOGRAPHIC LIGHTING EQUIPMENT; ELECTRONIC FLASH APPARATUS IN WHICH A CAPACITOR IS CHARGED AND THEREAFTER DISCHARGED THROUGH A GAS-FILLED TUBE TO PRODUCE A FLASH OF LIGHT; HIGH INTENSITY LIGHT SOURCE FOR GRAPHIC ARTS, CAMERA PHOTO TEMPLATE, DUPLICATION OF MICROFILM, AMONG OTHER PURPOSES; CONTROL UNITS FOR ELECTRONIC FLASH; ELECTRONIC PHOTOFLASH EQUIPMENT FOR PHOTOGRAPHIC USE; XENON-MERCURY LAMPS ADAPTED FOR PHOTOGRAPHIC USE AND OPTICAL INSTRUMENT USE AND FOR MICROSCOPE ILLUMINATORS; XENON-ARC LAMPS PRIMARILY ADAPTED FOR PHOTOGRAPHIC PURPOSES AND ASSOCIATED POWER SUPPLIES WHICH ARE CAPABLE OF BEING PULSED TO GIVE HIGH LIGHT OUTPUT FOR SHORT-TIME DURATIONS; LIGHT SOURCES PRIMARILY ADAPTED FOR PHOTOGRAPHIC PURPOSES AND ASSOCIATED POWER SUPPLIES USING XENON-ARC LAMPS