Form and Material Analysis
- Glass Bulb: Either clear or coated glass is used in regular light bulbs. Coated glass bulbs have a powdery substance on the inside, called Kaolin. It is a white, chalky clay in a powdered form that is blown in and electrostatically deposited on the inside of the bulb. It diffuses the light, producing a more gentle and evenly distributed light.
The glass bulb is usually spherical in shape, as a sphere is the strongest form of glass structure. It not only gives the bulb strength, but also helps in the even distribution of heat and light in every direction. - Gas: The glass bulb is filled with an inert gas such as Argon, Nitrogen, Krypton and Xenon. This causes a reduction in the evaporation of the filament, thus increasing the bulb's life span. It also conducts the heat from the filament, thereby cooling it down.
- Filament: A filament is prepared by mixing Tungsten and a binder and then drawing it into a wire around a mandrel. Going ahead the Mandrel is ten melted using acid, and the filament attains it's proper coiled shape.
Tungsten Filaments are considered as one of the greatest inventions in the history of bulbs, as they could be produced at a low cost and lasted longer than any other material.
4. Connecting Wires: The connecting wires are usually made of Nickle-iron wire. This wire is dipped into a Borax solution to make the wire more adherent to Glass. Borax, also known as Sodium Borate, is an important boron compound, a mineral and a salt of Boric acid.
5. Glass Stem: Incandescent light bulbs usually contain a stem or glass mount anchored to the bulb's base which allows the electrical contacts to run through the envelope without gas/air leaks.
6. Support Wires: These are small wires that are embedded in the stem to support the filament and/or its lead wires.It does not conduct any electricity.
7. Socket: Large lamps may have a screw base (one or more contacts at the tip, one at the shell) or a bayonet base (one or more contacts on the base, shell used as a contact or used only as a mechanical support). Contacts in the lamp socket help the electric current to pass through to the filament and causes the bulb to light up.
5. Glass Stem: Incandescent light bulbs usually contain a stem or glass mount anchored to the bulb's base which allows the electrical contacts to run through the envelope without gas/air leaks.
6. Support Wires: These are small wires that are embedded in the stem to support the filament and/or its lead wires.It does not conduct any electricity.
7. Socket: Large lamps may have a screw base (one or more contacts at the tip, one at the shell) or a bayonet base (one or more contacts on the base, shell used as a contact or used only as a mechanical support). Contacts in the lamp socket help the electric current to pass through to the filament and causes the bulb to light up.