SHORT ARC HIGH LUMINANCE MERCURY DISCHARGE LAMP

PROBLEM TO BE SOLVED: To provide a high pressure arc discharge lamp device that has a lamp and a driving means for the lamp. SOLUTION: The lamp (40) comprises mercury of a prescribed filling quantity and an envelope to form an electrical discharge chamber for housing a pair of electrodes, and the to...

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Bibliographische Detailangaben
Hauptverfasser:	HOWE STEPHEN HAROLD, VULLIAMY MICHAEL JUSTIN, GIRACH MAHOMED HANIF, PRESTON BARRY
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM BASIC ELECTRIC ELEMENTS BLASTING CINEMATOGRAPHY ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY ELECTROGRAPHY HEATING HOLOGRAPHY LIGHTING MECHANICAL ENGINEERING NON-PORTABLE LIGHTING DEVICES PHOTOGRAPHY PHYSICS SYSTEMS THEREOF VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a high pressure arc discharge lamp device that has a lamp and a driving means for the lamp. SOLUTION: The lamp (40) comprises mercury of a prescribed filling quantity and an envelope to form an electrical discharge chamber for housing a pair of electrodes, and the top end parts of the pair of electrodes are separated from each other and define the arc gap. The driving means for the lamp includes a means that prevents prills of mercury sealing object from being formed between the top end parts of the electrodes at the stop of operation of the lamp by acting on the electrodes. This means acting on the electrode may be means (42, 46) of decreasing smoothly the lamp voltage at the operation stop of the lamp or means (42, 44, 46) of making a short restrike of the arc once or more following the operation stop, or a means of vibrating the lamp after the operation stop of the lamp. COPYRIGHT: (C)2004,JPO