Electric lamp with molybdenum contact pins surrounded by non-cor

Details Electric lamp with molybdenum contact pins surrounded by non-cor Electric lamp with molybdenum contact pins surrounded by non-cor

1975-12-18

1977-03-29

Demeo, Palmer C.

Electric lamp and discharge devices

With envelope

Having base and connector

174 5052, 174 5064, 313331, H01J 546, H01J 6136, H01K 140

Patent

active

040151654

ABSTRACT:
Electric lamps having a quartz glass lamp envelope frequently have outer current conductors of molybdenum because this metal has a coefficient of expansion which corresponds best to that of quartz glass. Because molybdenum is sensitive to oxidation the current conductors quickly oxidize so that a good electric contact with connection terminals of a current source is no longer possible. According to the invention, the outer current conductors are surrounded by a sleeve of non-corrosive metal and are rigidly connected thereto by a local kink in the current conductor and the sleeve.

REFERENCES:
patent: 2385340 (1945-09-01), Baxter
patent: 3465197 (1969-09-01), Martin
patent: 3780328 (1973-12-01), Boddy et al.
patent: 3818558 (1974-06-01), Vause

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