page_title: Edison screw
hierarchical_section_title: Edison screw
caption_attribution_description: Čeština: Nejběžnější elektrická žárovka (jmenovité napětí&#160;230&#160;V, energetická třída E, příkon 60&#160;W, světelný tok 750&#160;lm, závit&#160;E27/ES, baňka&#160;A60). Vyfoceno ve studiu. Deutsch: Glühlampe der Marke Neolux mit klarem Glaskolben. (max.&#160;230&#160;V, 60&#160;W, Gewinde&#160;E27/ES, Energieklasse E), Studio English: Electric bulb from Neolux (max.&#160;230&#160;V, 60&#160;W, E27/ES, energyclass E) in studio Français&#160;: Ampoule électrique de la marque Neolux (max.&#160;230&#160;V, 60&#160;W, E27/ES, classe energétique E). Image prise en studio. Русский: Лампа накаливания. 230 В, 60 Вт, цоколь E27
context_page_description: Edison screw is a standard lightbulb socket for electric light bulbs. It was developed by Thomas Edison, patented in 1890, and was licensed in 1909 under General Electric's Mazda trademark. The bulbs have right-hand threaded metal bases which screw into matching threaded sockets. For bulbs powered by AC current, the thread is generally connected to neutral and the contact on the bottom tip of the base is connected to the "live" phase.
  In North America and continental Europe, Edison screws displaced other socket types for general lighting. In the early days of electrification, Edison screws were the only standard connector, and appliances other than light bulbs were connected to AC power via lamp sockets. Today Edison screw sockets comply with international standards.
context_section_description: Edison screw (ES) is a standard lightbulb socket for electric light bulbs. It was developed by Thomas Edison, patented in 1890, and was licensed in 1909 under General Electric's Mazda trademark. The bulbs have right-hand threaded metal bases (caps) which screw into matching threaded sockets (lamp holders). For bulbs powered by AC current, the thread is generally connected to neutral and the contact on the bottom tip of the base is connected to the "live" phase.
  In North America and continental Europe, Edison screws displaced other socket types for general lighting.  In the early days of electrification, Edison screws were the only standard connector, and appliances other than light bulbs were connected to AC power via lamp sockets. Today Edison screw sockets comply with international standards.
caption: 230-volt incandescent light bulb with E27 screw base
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