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The contact surface area, thickness and conductivity of the metal, connection methods and maximum operating temperature must all be considered in the design of a new socket. In addition, mechanical factors such as shape of the socket, fixture mounting and attachment, lamp support, ease of re-lamping and total cost of manufacture must be considered.
Two paired screw terminals, typically used for connecting ceiling-mounted light fixtures. Screw terminals are used extensively in building wiring for the distribution of electricity - connecting electrical outlets, luminaires and switches to the mains, and for directly connecting major appliances such as clothes dryers and ovens drawing in excess of 15 amperes.
Edison screw (ES) is a standard lightbulb socket for electric light bulbs. It was developed by Thomas Edison (1847–1931), patented in 1881, [ 1 ] and was licensed in 1909 under General Electric's Mazda trademark.
A wide variety of special light fixtures are created for use in the automotive lighting industry, aerospace, marine and medicine sectors. [2] [3] Portable light fixtures are often called lamps, as in table lamp or desk lamp. In technical terminology, the lamp is the light source, which, in casual terminology, is called the light bulb.
Screw-base lights are never used in automobile applications due to their loosening under vibration. Signal lights with internal or external coloured lenses use colourless bulbs; conversely, lights with colourless lenses may use red or amber bulbs to provide light of the required colours for the various functions.
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