LIGHTING FIXTURE Russian patent published in 1995 - IPC

FIELD: lighting engineering. SUBSTANCE: filament lamp is composed of glass bulb, threaded base coated with insulating compound in butt part and individual commutation leads in the form of split ring separated from each other with gaps anchored on base. Commutation leads have torus-like surface and are provided with locating protrusions between which contact plate of threaded lamp-holder occupies positions in succession. Luminous elements connected in parallel are placed on holders inside bulb. One of holders is common for all luminous elements, it is coupled to case of threaded base. Each holder links ends of luminous elements to proper commutation leads. EFFECT: facilitated manufacture, reduced manufacturing cost. 4 dwg