An early type of Siemens' Self Exciting dynamo (1873) with drum-wound armature and bar commutator. A dynamo is an electrical generator that creates direct current using a commutator. Dynamos were the first electrical generators capable of delivering power for industry, and the foundation upon which many other later electric-power conversion devices were based, including the electric motor, the alternating-current alternator, and the rotary converter.

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Siemens' Self Exciting Dynamo, 1873

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Size: 4350px × 3120px
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Photo credit: © Science History Images / Alamy / Afripics
License: Licensed
Model Released: No

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