Differential light emission translucent light bowl and cap

Details Differential light emission translucent light bowl and cap Differential light emission translucent light bowl and cap

1981-05-01

1984-02-28

Kelly, Donald G.

Illumination

Light source and modifier

Including reflector

362293, 362310, 362311, 362347, 362355, 362361, 362363, 362375, 362431, F21V 700

Patent

active

044344554

ABSTRACT:
The light source of an area light or streetlight mounted on a lamppost is enclosed by a lower upwardly flaring bowl having its upper end closed by a generally conical cap. The cap and bowl are made of polycarbonate pigmented by titanium dioxide so that the cap emits only light sufficient to enable its shape to be seen in darkness and the bowl is much more translucent to emit adequate light for illumination.

REFERENCES:
patent: Re19216 (1934-06-01), Pipkin
patent: 627239 (1899-06-01), Prendergast
patent: 1543606 (1925-06-01), Harrison
patent: 1609277 (1926-11-01), Oliver
patent: 1778305 (1930-10-01), Blau
patent: 1833122 (1931-11-01), Oliver
patent: 2830171 (1958-04-01), Buck
patent: 4160286 (1979-07-01), Merritt

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