EP 0084934 A1 19830803 - Lamp reflector.
Title (en)
Lamp reflector.
Title (de)
Lampenreflektor.
Title (fr)
Réflecteur pour lampe.
Publication
Application
Priority
GB 8201207 A 19820116
Abstract (en)
To provide an increase horizontal spread of light compared with a paraboloidal reflector, the lamp reflector comprises a dished body (10) having an internal reflective surface defined at least partly by a series of troughs (15) whose surfaces are generated by movement of a parabola so that the tangent at the apex thereof moves parallel to itself along a polygonal line whose sides are tangents to a parabola which has the same focal length as that of the first-mentioned parabola and which is perpendicular to the latter. In an alternative embodiment, only one such trough is provided between a pair of paraboloidal reflective portions each of which has its focus coincident with the second-mentioned parabola.
IPC 1-7
IPC 8 full level
F21V 7/09 (2006.01); F21S 8/10 (2006.01); F21V 7/00 (2006.01)
CPC (source: EP)
F21S 41/336 (2017.12)
Citation (search report)
- [X] US 1540813 A 19250609 - ANDRES SOLOSABAL
- [A] US 1558270 A 19251020 - MORRISON WALTER F
- [A] GB 2054815 A 19810218 - CIBIE PROJECTEURS
- [A] US 1691131 A 19281113 - RYDER CHARLES D
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 83300102 A 19830110; JP 430983 A 19830117