Looking Back: The Curious Case of the Dynamo Magnetic Field Generator

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Several years ago, I was digging through recent history regarding Energy, Generators, and Batteries to try and better understand the development trajectories of these technologies when a curious device came into my perception:

The Dynamo Magnetic Field Generator.

This was a large piece of equipment. It was commonly used in Lighthouses as a source of electricity and had a fascinating history before it almost disappeared entirely from our world. Though not quite, virtually every home in America owns one of these devices in its modern form, and strangely enough – no one talks about it.

Curious?

Let’s analyze:
“Electrical energy and magnetism will change the world.”

Joseph Henry, discoverer of electromagnetism

First, we need to travel back to 1808 to the office of the famed English Physicist and Chemist Humphry Davy, whose developments in arching electricity between two poles leads to ‘arch lighting’ technologies. Davy envisions this technology could be used in Construction sites, Lighthouses, and other Public Areas.

Though I won’t bore you with it here, Davy had an especially interesting life - not only the mentor to a young Michael Faraday (Faraday’s Law) but also discovering a literal list of periodic elements while disproving a variety of scientific notions held at the time. Worth the read if you have the time. (Links below)