Electric lamp with SiO.sub.2 vessel and seal therefor

Details Electric lamp with SiO.sub.2 vessel and seal therefor Electric lamp with SiO.sub.2 vessel and seal therefor

1991-08-27

1992-10-27

DeMeo, Palmer C.

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

313318, 313331, 313332, 313634, H01J 6136

Patent

active

051592398

ABSTRACT:
The electric lamp has a quartz glass lamp vessel having tungsten current supply conductors extending through the wall of the lamp vessel to an electric element arranged in the lamp vessel. The current supply conductors have a continuous coating of quartz glass where they extend through the envelope wall from the interior to the exterior of the lamp vessel. The coating forms with the current supply conductor a glass/metal interface forming a gas-tight seal. The glass of the coating adjoining the interface contains thorium, hafnium, chromium, aluminum, titanium, tantalum, magnesium, calcium, strontium, barium, zirconium, lanthanum, scandium, lanthanides, niobium, boron and yttrium. The coating has a very strong adhesion to the metal and; the lamp vessel at the gas-tight seal has a great strength.

REFERENCES:
patent: 2114869 (1938-04-01), Bol et al.
patent: 2617068 (1952-11-01), Spinnler et al.
patent: 2675497 (1954-04-01), Meister et al.
patent: 3448320 (1969-06-01), Millikan
patent: 3742283 (1973-06-01), Loughridge
patent: 4074167 (1978-02-01), van den Broek et al.
patent: 4086075 (1978-04-01), Ekkelboom et al.
patent: 4171500 (1979-10-01), van Lieshout
patent: 4282395 (1981-08-01), Hagemann
patent: 4691142 (1987-09-01), Dohmen

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