Vacuum-tight metal plug seal for electric lamp envelope

Details Vacuum-tight metal plug seal for electric lamp envelope Vacuum-tight metal plug seal for electric lamp envelope

H - Electricity

01

K

313/172.4

H01K 1/38 (2006.01)

Patent

CA 1135783

1 PHN.9233C. ABSTRACT: In electric lamps a type of glass is used for the envelope which, in many cases, has a coefficient of expansion which differs considerably from that of the current supply conductors. Therefore, special measures have to be taken to seal the lamp envelope in a vacuum- tight manner around the current supply conductors. The invention provides a simple, vacuum-tight seal of a lamp envelope, which seal consists of a metal plug which is sealed both to the glass of the lamp envelope and to the current supply wires. The metal plug of 100 parts by weight of a first metal (tin and/or lead) 0.05-1 parts by weight of a second metal (titanium, zirconium, haf- nium, niobium, tantalum, and vanadium) has a strong adhering power and a large ductility.

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