Some think the Greeks had many engines like this, but they were scrapped by later generations who did not understand them, because they were made of valuable brass
There was the Antikythera mechanism around 100-200BC which has been referred to as an analogue computer. It appears to be able to compute astronomical positions and Olympiads.
clem57 - a bit of a trick question perhaps, as I believe that 'computer' originally referred to that of a person who computes/calculates (e.g. someone who created mathematical tables) and thus the term computer was presumably in use long before the mechanical and electronic machines appeared on the scene. So I'd probably have to go with 'mother nature' as the inventor.
This is true. My Dad was a "geodetic computer" in the Army Air Corps, and used a Marchant calculator to assist with his computations. What we call a "computer" today used to be called an "automatic computer" or "electronic computer". The names of lot of early automatic computers ended with "AC".
I think that initially Swan was only able to achieve a partial vacuum in the lamp, so his carbonised paper filament didn't last long enough to make it a practical lamp.
Whereas Edison was using carbonised thread filament in a pure vacuum and was able to get his lamps to last up to 600hours which made them of practical use. I believe he later switched to Swan's carbonised paper as a filament, then to carbonised bamboo.
(There was a documentary about it broadcast here on TV last week.)
The 'discovery of the light bulb' could refer to the carbon arc lamp which had two electrodes. 'Edison's light bulb' then came along which used a filament in a (pure) vacuum and was probably 'one of the first uses of vacuum tubes for electrical applications'.
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