1. Internal Combustion Engine — 2023-10-09 23:51:33

   …dward Butler constructed the first petrol internal combustion engine. Butler invented the spark plug, ignition magneto, coil ignition and spray jet carburetor. {{Image url="Hornsby-Akroyd-Engine.jpg" class="left" title="Hornsby-Akroyd Engine" w…

2. Electric Motor — 2023-09-23 15:52:02

   …metals. Dilute sulphuric acid was used to charge the battery. == Galvanometer == He also invented the first suspended coil galvanometer, a device for measuring current. Sturgeon died in poverty and is buried in an overlooked Prestwich grave…

3. Loudspeaker — 2021-11-07 21:26:37

   …ctical //'transmitter'// for his telephone in 1877 that was improved by Siemens. It used a permanent bar magnet with a coil of wire wrapped around it, and an iron diaphragm using harmonic vibrations. …

4. Light Bulb — 2021-08-09 21:56:27

   …monstrated a constant electric light at a public meeting in Dundee, Scotland. - 1840, Warren de la Rue used a platinum coil in an evacuated tube. - 1841 Frederick de Moleyens had first patent for an incandescent light in a vacuum bulb. ::c::…

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