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DC generator

Thomas Alva Edison（1847 – 1931）

Thomas Alva Edison (1847-1931): American inventor of the light bulb, phonograph & motion pictures. Pioneer of industrial research with 1093+ patents. Explore his legacy!

NEMO Science Museum (阿姆斯特丹, 荷兰)

阿姆斯特丹标志性的 NEMO 科学博物馆通过互动式科学展览和令人惊叹的屋顶美景，为您开启一场沉浸式旅程，邀请各种年龄段的好奇心灵共同探索发现的奇迹。

Edison built this DC generator based on his 1878 design. The two long, vertically oriented black cylinders are the field coils that generate the magnetic field in which the rotor turns. The shape of those coils led the lab workers who worked on this design – all of whom were men – to refer it as ‘The Long-legged Mary-Ann’. The rotor is on the bottom, behind an upright lever. The lever controls a switch that can be set so the power generated by the rotor flows through the field coils in a parallel circuit, allowing the generator to create its own field. This type of generator was built in various sizes, and there are versions up to two metres high. Large horizontal versions were used for the world
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