Electric lamp having a mirror-coated lamp vessel

Details Electric lamp having a mirror-coated lamp vessel Electric lamp having a mirror-coated lamp vessel

1987-12-23

1989-01-10

Silverberg, Sam

Coating processes

Electrical product produced

Hollow article

445 13, 445 11, 148 63, B05D 512

Patent

active

047973021

ABSTRACT:
The electric lamp has a lamp vessel (1) of which a wall portion (4) is mirror-coated at its inner surface with an aluminum layer. This wall portion (4) has a boundary (5) near the largest diameter (2) of the lamp vessel (1). This boundary (5) is adjoined by a zone (10) coated with a transparent aluminum oxide layer. In the lamp, a dark zone caused by a very thin aluminum layer adjoining the boundary (5) is avoided.

REFERENCES:
patent: 2918595 (1959-12-01), Cressman

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