Clamped seal for high pressure gas discharge lamp

Claim 1

A HIGH PRESSURE GAS DISCHARGE LAMP COMPRISING A QUARTZ LAMP ENVELOPE HAVING A PAIR OF GENERALLY TUBULAR PORTIONS OPEN AT THEIR OUTER ENDS WITH AN ENLARGED ANNULAR SHOULDER PORTION AROUND THE OUTER EDGE OF EACH OF THE OUTER ENDS, A COLLAR AROUND EACH OF THE TUBULAR PORTIONS AND BEARING AGAINST SAID SHOULDER PORTIONS, AN ELECTRICALLY CONDUCTIVE PLATE ACROSS EACH OF THE OPEN ENDS OF SAID TUBULAR PORTIONS, SEAL MEANS BETWEEN THE PLATES AND ADJACENT EDGES OF SAID OPEN ENDS, CLAMP MEANS BETWEEN THE COLLARS AND THE PLATES SECURING THE PLATES AGAINST SAID OPEN ENDS, A PAIR OF ELECTRODES WITH ONE ELECTRICALLY CONDUCTIVELY SECURED TO ONE PLATE AND THE OTHER ELECTRICALLY CONDUCTIVELY SECURED TO THE OTHER END PLATE AND BOTH EXTENDING INTO THE LAMP ENVELOPE THROUGH THE RESPECTIVE OPEN ENDS, ONE OF SAID ELECTRODED BEING A HOLLOW ANODE ELECTRODE WITH INLET AND OUTLET CONDUITS THROUGH THE ADJACENT PLATE INTO THE HOLLOW PORTION OF THE ELECTRODE, FOR CIRCULATION OF LIQUID COOLANT THROUGH THE ELECTRODE, THE OTHER ELECTRODE BEING A SUBSTANTIALLY SOLID CATHODE ELECTRODE AND MEANS FOR LIQUID COOLING SAID CATHODE ELECTRODE.