Reflective electric incandescent lamp for producing high intensi

Details Reflective electric incandescent lamp for producing high intensi Reflective electric incandescent lamp for producing high intensi

1989-07-24

1991-03-26

Yusko, Donald J.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Reflector

313114, 313115, H01K 132

Patent

active

050032151

ABSTRACT:
The electric incandescent lamp according to the invention has a lamp vessel (1) comprising a second wall portion (6) opposite to a neck-shaped first wall portion (4). Between the largest diameter (3) and the second wall portion (6) is disposed a third mirror-coated wall portion (7,7'), which is mainly curved in axial section along the arc of a circle, whose center (8,8') is located on the other side of the axis of symmetry (2) and of a plane passing through the largest diameter (3). The filament (10) has a plane of symmetry passing through the axis of symmetry (2) and extends on either side of a second plane through said axis at right angles to the first plane. The lamp produces together with an external reflector a narrow beam with a high luminous flux at the center thereof.

REFERENCES:
patent: 2218346 (1940-10-01), Spaeth
patent: 4317060 (1982-02-01), Fitzgerald
patent: 4803394 (1989-02-01), Holten

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