Improving incandescent bulb efficiency

Patent · Mon Mar 31 23:00:00 EST 1980

OSTI ID:5812899

Hauer, C R

Incandescent light bulb efficiency is improved by: (1) modifying the surface micro-structure of a lamp filament in such a way as to increase the emissivity in the visible region of the spectrum without significantly increasing this quantity outside this spectral region, or suppressing the emission of energy outside the visible portion of the spectrum by modifying the surface structure; (2) application of refractory coatings on the lamp filament that are highly emissive in the visible region of the spectrum; and (3) coating the filament with an ''optically thin'' refractory material to suppress filament evaporation, permitting higher operating temperature.

• Assignee: Eikonix Corp
• Patent Number(s): US 4196368
• OSTI ID: 5812899
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
CARBIDES
CARBON COMPOUNDS
COATINGS
CRYSTAL STRUCTURE
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSIVITY
FILAMENTS
INFRARED RADIATION
LIGHT BULBS
LUMINOSITY
METALS
MICROSTRUCTURE
MODIFICATIONS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
REFRACTORY METALS
SURFACE PROPERTIES
SURFACES
TANTALUM CARBIDES
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VISIBLE RADIATION