Low-pressure sodium vapor discharge lamp with protective glass l

Details Low-pressure sodium vapor discharge lamp with protective glass l Low-pressure sodium vapor discharge lamp with protective glass l

1984-06-04

1988-11-08

Moore, David K.

Electric lamp and discharge devices

Electrode and shield structures

With lead wire or connector

313636, 313634, 313623, 313332, H01J 550

Patent

active

047836121

ABSTRACT:
A low-pressure sodium vapor discharge lamp provided with a discharge tube having an electrical lead-through conductor extending through the wall of the discharge tube to an internal lamp electrode. The lead-through is enveloped by a protective glass layer having a double bead construction. The layer portion facing the electrode is borate glass and is thinner than a second portion within the discharge tube wall which is lime glass. The lead-through construction thus obtained has a high resistance to sodium in the discharge tube and also to mechanical forces.

REFERENCES:
patent: 3134920 (1961-01-01), Van de Weijer et al.

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