this post was submitted on 17 Oct 2023
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Likey also didn't contain rare earth minerals - no where near as effective but could have been less damaging and easier to make.
Then again, could have been a combination of arsenic, asbestos and cocaine so who knows.
I was too curious:
Cove's device was a sort of thermocouple, and thus not based on newly-discovered natural processes or scientific principles. In the patent application the device was described as follows: A thermo-electric battery and appurtenances comprising a block of incombustible, non-conductive material, a series of pairs of elements comprising a plurality of elements formed of an alloy of antinomy and zinc, and a plurality of elements connecting said antinomy and zinc elements, said elements connecting said first-mentioned elements being alternatively of copper and of an alloy of nickel, copper and zinc.
https://journals.lib.unb.ca/index.php/MCR/article/view/17744/22231
Oh, it's just a thermopile put out in the sun.
I can see why it never caught on then. You'd be relying on the difference in temperature between the hot side of a thing painted black put in the sun and the cool side in the shade. The amount of energy you'd get from such a setup would be infinitecimal. I'd expect you'd need to do an absurd amount of work and use an absurd amount of material just to power a single house.
The amount of energy it would take to build a "solar cell" thermopile that'd generate 1.5v with a quite high internal resistance would probably be in the megawatt-hours, likely from coal and oil.
There were some numbers in one of the links I posted, hopefully that is able to give some solidity to the theory.
It was early when I read the article, I got the impression that the 9W was for the furnace version of the thermopile electric generator.
The larger versions generated 45, 60 and 240 watts. Another source said 500 watts.