Method for making high intensity discharge arc tube

Details Method for making high intensity discharge arc tube Method for making high intensity discharge arc tube

1974-12-12

1976-06-29

Lake, Roy

H01J 918

Patent

active

039662888

ABSTRACT:
A quartz tube is held in a lathe and rotated while heat is applied to an intermediate portion thereof. When the quartz is heated to plasticity, rotation is stopped and a mold is rapidly closed around the softened quartz. The quartz is shaped in the mold by the rapid application of gas pressure in the tube.

REFERENCES:
patent: 3309188 (1967-03-01), Porter et al.
patent: 3685880 (1972-08-01), Sobieski
patent: 3858078 (1974-12-01), Koury
patent: 3870919 (1975-03-01), Hellman et al.

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