Improving incandescent bulb efficiency

Patent · Tue Apr 01 00:00:00 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
• Resource Relation: Patent File Date: Filed date 7 Sep 1977; Other Information: PAT-APPL-831172
• Country of Publication: United States
• Language: English

Related Subjects

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