INCANDESCENT (FILAMENT) LAMPS


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INCANDESCENT (FILAMENT) LAMPS
INCANDESCENT (FILAMENT) LAMPS48. The incandescent lamp‚ÄÉconsists of a filament which is a highly refractory conductor mounted in a transparent or translucent glass bulb and provided with a suitable electrically connecting base. The filament is heated by the passage of an electric current through it to such a high temperature that it becomes incandescent and emits light. In incandescent lamps of the older types the air was, insofar as practicable, exhausted from the space within the bulb and surrounding the conductor (filament), forming a partial vacuum. But in many of the modern lamps this space is filled with an inert transparent gas such as nitrogen. The conductor must have a high melting point or a high vaporizing temperature and a high resistance; it must …
Citation
Terrell Croft; Frederic P. Hartwell; Wilford I. Summers: American Electricians' Handbook, Sixteenth Edition. INCANDESCENT (FILAMENT) LAMPS, Chapter (McGraw-Hill Professional, 2013), AccessEngineering Export