EP 0054401 A2 19820623 - Electric light source with integral switch.
Title (en)
Electric light source with integral switch.
Title (de)
Elektrische Lichtquelle mit eingebauter Ausschaltvorrichtung.
Title (fr)
Source lumineuse électrique à interrupteur incorporé.
Publication
Application
Priority
- GB 8040117 A 19801215
- GB 8105847 A 19810224
Abstract (en)
An electric lamp (30) incorporates an integral mercury switch (37) with the lamp structure to provide an attitude-sensitive light source. The mercury switch may be incorporated within the lamp envelope, either with the filament or in a separate compartment of the envelope, within a specially extended portion of an exhaust tube, or within a cap structure sealed to the light source envelope. The mercury switch is either specially fabricated during formation of the lamp structure, or may comprise a preformed capsule. The unit may be fitted in conventional screw bayonet and other sockets in the same manner as a corresponding ordinary lamp.
IPC 1-7
IPC 8 full level
H01K 1/64 (2006.01)
CPC (source: EP)
H01K 1/64 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 81305793 A 19811208