Electric lamp with containment sleeve having a helically coiled

Details Electric lamp with containment sleeve having a helically coiled Electric lamp with containment sleeve having a helically coiled

1996-03-14

1998-03-17

Patel, Ashok

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313312, 313573, 313634, 362186, H01J 502

Patent

active

057290784

ABSTRACT:
The electric discharge lamp has a discharge vessel (2), which is mounted in an outer bulb (1). A glass sleeve (10) is surrounding the discharge vessel. A coiled wire (11) is used as an envelope (11) to a glass sleeve. The wire is in an electrically floating manner fixed around the sleeve (10), e.g. by clamping fit. The construction of the lamp is simple an effective to protect the outer bulb (1) from being damaged by an explosion of the lamp vessel (2) and to prevent sodium, if present, to disappear from the discharge vessel as a result of photoemission.

REFERENCES:
patent: 4678960 (1987-07-01), Reiling
patent: 4721876 (1988-01-01), White et al.
patent: 4942330 (1990-07-01), Karlotski et al.
patent: 4950938 (1990-08-01), Ramaiah

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