H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 9/40 (2006.01) H01J 9/00 (2006.01) H01J 9/32 (2006.01) H01J 61/34 (2006.01)
Patent
CA 2042143
LD10,109 ABSTRACT This discharge lamp includes (i) an inner envelope of vitreous material comprising a bulbous portion and two tubular portions extending from the bulbous portion and (ii) a tubular shroud of vitreous material surrounding the bulbous portion and the two tubular portions. The lamp is made by the following method. A disk-shaped enlargement is formed in each of the tubular portions by heating a localized region of the tubular portion to its softening point and then subjecting said localized region to a compressive force (i) that is abruptly applied along the length of the tubular portion and (ii) that drives the softened vitreous material radially outward into a disk formation. Then the tubular shroud is placed over the inner envelope so that each disk- shaped enlargement is positioned with its outer periphery closely adjacent the inner periphery of the surrounding tubular shroud. Then seals are formed between the outer peripheries of the disk-shaped enlargements and the surrounding shroud portions by heating each of the surrounding shroud portions to its softening point and collapsing it about the outer periphery of the associated disk-shaped enlargement.
Biel John J.
Davenport John M.
Hansler Richard L.
Hlahol Paul G.
Biel John J.
Company General Electric
Craig Wilson And Company
Davenport John M.
Hansler Richard L.
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