Gas discharge light source with a recirculating gas supply

Claim 1

A HIGH INTENSITY LIGHT SOURCE, WHICH COMPRISES WALL MEANS TO DEFINE AN ARC CHAMBER, AT LEAST A PORTION OF SAID WALL MEANS BEING TRANSPARENT AND COMPRISING A WINDOW THROUGH WHICH LIGHT MAY BE DISCHARGED FROM SAID CHAMBER, MEANS TO PROVIDE WITHIN SAID CHAMBER A HIGHLY REFLECTIVE MIRROR WHICH IS SHAPED AND DISPOSED TO REFLECT LIGHT FROM PREDETERMINED REGION OF SAID CHAMBER TO AND THROUGH SAID WINDOW, SAID MORROR BEING SHAPED AS A SURFACE OF REVOLUTION ABOUT PREDETERMINED AXIS WHICH EXTENDS THROUGH SAID PREDETERMINED REGION, ELECTRODE MEANS DISPOSED TO MAINTAIN WITHIN SAID CHAMBER A CONTINUOUS HIGH-CURRENT ELECTRIC ARC AT LEAST A PORTION OF WHICH IS LOCATED AT SAID REGION, MEANS TO SUPPLY AN ELECTRIC CURRENT TO SAID ELECTRODE MEANS TO MAINTAIN SAID ARC THEREBETWEEN, SAID ELECTRIC CURRENT HAVING A MAGNITUDE AT LEAST ON THE ORDER OF HUNDREDS OF AMPERES, AND MEANS TO MAINTAIN IN SAID CHAMBER A CONTINUOUSLY-CIRCULATING INSERT GAS UNDER A PRESSURE MANY TIMES ATMOSPHERIC, SAID LAST-NAMED MEANS INCLUDING INLET MEANS INTRODUCE GAS CONTINUOUSLY INTO SAID CHAMBER, OUTLET MEANS TO DISCHARGE SAID GAS CONTINUOUSLY FROM SAID CHAMBER, AND MEANS INCLUDING COOLING MEANS TO RECIRCULATE SAID GAS FROM SAID OUTLET MEANS TO SAID INLET MEANS, SAID INLET MEANS AND OUTLET MEANS BEING SO LOCATED THAT AT LEAST A PORTION OF SAID ARC IS STABILIZED BY SAID GAS.