EP 0534606 A1 19930331 - Electric lamps having a lens shaped arc or filament chamber.
Title (en)
Electric lamps having a lens shaped arc or filament chamber.
Title (de)
Elektrische Lampen mit linsenförmiger Bogen- oder Glühfaden-Kammer.
Title (fr)
Lampes comportant une chambre d'arc ou de filament en forme de lentille.
Publication
Application
Priority
US 75185691 A 19910829
Abstract (en)
An electric lamp (30) having either an arc or a filament as the light source enclosed within a light transmissive chamber (34) whose wall (32) is in the shape of a positive or convergent lens. Such lamps increase the amount of light emitted in a direction normal to the filament or arc axis and when mounted in a reflector result in more light being reflected within the desired beam pattern. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 61/30 (2006.01); H01J 61/02 (2006.01); H01K 1/28 (2006.01); H01K 1/30 (2006.01)
CPC (source: EP KR)
H01J 61/025 (2013.01 - EP); H01K 1/28 (2013.01 - KR)
Citation (search report)
- [X] US 3457447 A 19690722 - MENELLY RICHARD A, et al
- [X] DE 3617662 A1 19871203 - HEIMANN GMBH [DE]
- [X] FR 829585 A 19380630
- [X] GB 950283 A 19640226 - KNUT SASSMANNHAUSEN
- [X] US 1961964 A 19340605 - DODGE ADIEL Y
- [X] PATENT ABSTRACTS OF JAPAN vol. 1, no. 145 (E-407)28 May 1986 & JP-A-61 008 843 ( TOSHIBA K.K. ) 16 January 1986
- [Y] PATENT ABSTRACTS OF JAPAN vol. 12, no. 80 (E-590)12 March 1988 & JP-A-62 219 457 ( CANON INC ) 26 September 1987
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
EP 0534606 A1 19930331; CA 2076090 A1 19930301; JP H05205698 A 19930813; KR 930005508 A 19930323
DOCDB simple family (application)
EP 92307677 A 19920821; CA 2076090 A 19920813; JP 22632092 A 19920826; KR 920015531 A 19920828