Inventions and Explanations

 

1855:
Electric or Arc welding

James Joule is attributed with the invention of arc welding.

http://www.ece.ubc.ca/~workshop/images/tools_machineries/welding_TIG2.jpg

Arc or Electric Welding is welding by using an electric current to melt both the metal to be welded and the welding rod or electrode that is being added.

 

 

1869:
The Green Flash

James Joule is attributed with explaining the well talked about Green Flash (in our class by Dr. Newman.) James Joule explained the green flash in a letter to the Manchester Literary and Philosophical Society in 1869.

http://www.icstars.com/Mad/Astro/GreenFlash.html

The green flash occurs because the atmosphere acts like a prism. The "prism" refracts the sunlight and separates it into different colors. As the sun sets, the red and orange light, which are refracted the least, disappear first. The green light is in generally the middle of the spectrum, it is usually the last color to be seen by someone watching a sunset. At sunrise the phenomenon is reversed, with the green flash appearing first.

 

 

1872:
The Displacement Pump

James Joule is attributed with the invention of the displacement pump.

The displacement pump is a apparatus that lifts, transfers, or increases the pressure of a fluid (gas or liquid) or create a vacuum in an enclosed space by the removal of a fluid (gas or liquid.)

 

 

Joule

The unit of "Joule" is used today to Honor him.

"Joule" is used as the International System unit to measure energy that is electrical, mechanical, and thermal.