Why did Edison develop his own dynamo?

We may find it difficult to imagine a world without electric supply. But in those days, Edison did not have the luxury of having electric plugs on the wall. To conduct his experiments, he had to generate his own power.

Edison realised that the existing generators used for arc lighting would not be enough for his incandescent lighting. Therefore, Edison and his chief assistants Charles Batchelor and Francis Upton started to work on designing a new generator. The team designed a new dynamo during the first months of 1879, which was different in many ways from the others that then existed. Most importantly, it had a smaller internal resistance, which meant a more efficient power output. Edison’s dynamo had large bipolar magnets, which gave it an interesting nickname – ‘long-legged Mary-Ann’.

The new dynamo helped to provide the first public electric supply in the U.S.

Picture Credit : Google

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