1. Vacuum Tube — 2023-09-23 15:57:19

   …Vacuum Tube :: {{Databox caption="Inventor" Image="JohnAmbroseFleming.jpg" width="250" title="John Ambrose Fleming" birth_date="29/11/1849" birth_place="Lancaster" death_date="18/4/1945" death_place="Sidmouth" }} === John A…
   …mbrose Fleming 1904 === [[Technology]]:[[1900s]] Sir John Ambrose Fleming ( 1849 – 1945) born in Lancaster, [[Lancashire]], [[England]] invented the first **thermionic valve** or vacu…

2. Fire Extinguisher — 2021-08-09 21:05:28

   …tion contained within compressed air. == Earlier == The first fire extinguisher, of a sort, was patented in 1723 by **Ambrose Godfrey **from [[England]]. His idea was more of a 'sledge hammer' approach. It consisted of a cask of fire-extinguishi…

3. Thermionic Valve — 2016-03-03 15:03:44

   …Thermionic Valve :: Thermionic Valve === John Ambrose Fleming 1904 === {{redirect target="Vacuum Tube"}}…

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