Electric lamp having an envelope with an intermediate zirconium

Details Electric lamp having an envelope with an intermediate zirconium Electric lamp having an envelope with an intermediate zirconium

1986-04-18

1988-03-01

Moore, David K.

Electric lamp and discharge devices

With temperature modifier

For lead-in-seal or stem protection

313 44, 313635, 313318, H01J 6135, H01J 516, H01J 724

Patent

active

047288477

ABSTRACT:
An electric lamp having a glass lamp vessel 1 with a seal 7 coated with an intermediate coating layer of zirconium oxide 8. Lamp vessel 1 is connected at its seal 7 by a sealing cement 9 to a lamp cap 2. Zirconium oxide coating 8 completely separates seal 7 from sealing cement 9 and reduces mutual adherence therebetween. During operation of the lamp, zirconium oxide coating 8 reduces the thermal load and prevents cracking of seal 7 of lamp vessel 1.

REFERENCES:
patent: 3588564 (1971-06-01), Vetere
patent: 3784861 (1974-01-01), Notelteirs et al.
patent: 4342937 (1982-08-01), Nagel
patent: 4464603 (1984-08-01), McVey
patent: 4568854 (1986-02-01), Westlund, Jr. et al.

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