What is the Edison screw?

Edison bolt is a type of assembly that is commonly used with bulbs. The sockets designed for use with this type of assembly contain central contact and a female screw container, while the bulbs have a screw screw at one end. The screw base consists of one side of the electrical connection and the center contact serves as the other. Edison's screws can be made in a variety of sizes and usually refers to the letter E, followed by the base diameter, measured in millimeters. There are a number of competitive luminaire designs, although the Edison screw is the most popular in the United States, a lot of Europe and other countries around the world. Some used spring clips to hold bulbs on site, while others used threaded pins or other patterns. The Edison bolt was originally introduced in the first decade of the 20th century and eventuals became the most common base of the bulb in the United States and other countries around the world. Other fittings for bulbs such as Bayonet Cap are still popular in Europe andThey are also used in many 12 volt applications in the United States.

Each bulb that has the Edison screw base can easily be defined by the size of this base. The common designation of bulbs with Edison screws is the letter E and the number that represents the size of the base. In the United States, the most common bulb of the E26 household, which has a base with a diameter of 26 mm (about 1.02 inches). A similar bulb, E27, usually occurs in European countries and other areas with 240V electricity.

There are many other sizes of Edison screws, although those that are usually used with 120V or 240V electricity fall into four general categories. Candelabra bulbs are usually the smallest and have E11 in the United States and E12 in Europe. Medium bulbs are E17 and E14, size E26 and E27 are referred to as medium and Goliath or mogul bulbs are E39 and E40. Bulbs that have a screwEdison smaller than E11 or large than the E40 usually have less common, specialized use.

Edison bolt can also be used for direct current lamps (DC) in devices such as batteries and model trains, although these settings are also common bayonet caps and bi-bike bases. Bulbs with a screw diameter of 10 mm (about 0.39 inches) and smaller are usually rated to less than 30 V, unlike larger bulbs that can be used with 120 V or 240 V. The Edison screw is also a variant referred to as a three -way bulb, which contains two center contacts instead. These bulbs contain another fiber with a lower power consumption that can be used if installed in compatible accessories.