1. Roundabout — 2021-08-16 09:58:53

   …S – 1990. == Roundabout Pro's == A true roundabout is as near to maintenance free as you can get. No traffic light bulbs to replace or traffic chaos when there is a power cut. New research in America has shown that where a roundabout has …

2. Light Bulb — 2021-08-09 21:56:27

   …lament incandescent lamp. However, the lack of a good vacuum and an adequate electric source resulted in an inefficient bulb with a small, uncontinued lifetime. {{Image url="JSwanPlaque.jpg" title="Joseph Swan Plaque" width="300" class="right"…
   …d. Ten more years later, after electricity costs had come down, there were 3 million customers and all the basic light bulb patents had expired. (...) Seven years, and more than $100,000 in litigation expenses after Edison’s patent was inval…
   …wed that they were simply extending Sawyer’s (or Swan’s) work with carbon "burners" or "rods" in an evacuated glass bulb. (...) In fact, Edison and his team did not find a commercially workable filament (bamboo) until more than 6 months af…
   …nventors were needed == It took many small steps by several inventors to find the right formula for the electric light bulb. <<{{image url="Light_bulb.gif" title="Incandescent light bulb" width="200" }}<< - 1761 : Ebenezer Kinnersley from G…

3. Electric Toaster — 2020-12-01 01:05:39

   …the country's leading distributor and manufacturer of electricity generating and lighting systems. <<{{image url="Light_bulb.gif" title="Incandescent light bulb" width="200" }}<< Crompton's reputation was such that, in 1880, the chemist [[Li…
   …ght Bulb|Joseph Swan]] sought his opinion when he first developed incandescent lamps for indoor use. Crompton immediately saw th…

4. Hydroelectric Power — 2020-08-17 09:05:43

   …icity was also used to power an arc lamp installed in the Gallery in 1878. The arc lamp was replaced in 1880 by [[Light_bulb| Joseph Swan's incandescent lamps]]. It was the first //'smart home'// with electric incandescent lighting, a dish was…

5. Stevenson Screen — 2020-08-17 08:38:43

   …venson. The Stevenson Screen is the standard used by the World Meteorological Organization. The screens contain a dry bulb thermometer and a wet bulb thermometer. Larger screens also include minimum and maximum thermometers and optional recor…

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