ELECTRIC FILAMENT LAMP Russian patent published in 2015 - IPC H01K3/00 

FIELD: electricity.

SUBSTANCE: electric filament lamp comprises a base, a bulb, a holder, electrodes, luminous body consisting of several hot filaments fixed at electrodes, preferable four ones, and installed with potential in-turn switching of them. Hot filament consists of at least three parts, one central part and two peripheral ones, which are placed and fixed at the above electrodes. The central part of hot filament is made with resistance exceeding resistance of each peripheral part. Luminous body contains additional peripheral hot filaments connected in parallel to the main ones.

EFFECT: improvement of operational performance.

1 dwg