Inductively coupled incandescent light bulb

The bulb of claim wherein 1 said magnetic means comprise:

• a high permeability magnetic circuit having first and second sides and excitation means for applying a varying magnetic field to said first side;
• and
• said second side further includes a gap near a midpoint thereof;
• and
• said evacuated bulb is located within said gap such that the filament plane lies normally to a longitudinal axis of said second side.

A method for producing light from an evacuated bulb comprising:

• providing a loop filament disposed within an evacuated bulb;
• inducing an electrical current within said filament using a magnetic circuit responsive to a first magnetic field to excite a primary side of said magnetic circuit;
• and
• heating said loop filament to incandescence with said electrical current.

A method of providing lift to a filament disposed within an evacuated bulb comprising:

• providing an upper magnetic face disposed above said evacuated bulb;
• providing a lower magnetic face disposed below said evacuated bulb, said lower magnetic face having a larger cross-sectional area than a cross-sectional area of said upper magnetic face;
• providing a magnetic field passing between said upper and lower magnetic faces, said magnetic field being more intense near to said upper magnetic face than near to said lower magnetic face;
• and
• deriving from said magnetic field a net upward force acting on said filament thereby providing the lift to the filament.