The Vacuum Tube A vacuum tube is ... De Forest invented something he called the "audion." Not only did it force current to move in a single direction, but it could be used ...

The Making Of A Vacuum Tube. 6 Comments . by: Adam Munich. May 14, 2012. Title: ... detailing everything from the work led up to the invention of the tube to the lives of the inventors themselves. ...

Later in his life, de Forest served a term as president of the IRE (1930) and in 1946 received the AIEE’s Edison Medal for his development of the vacuum tube. Although de Forest died at the age of 87 ...

De Forest invented the device in 1906, by inserting a grid into the center of a vacuum tube. Applying voltage to the grid controlled the amount of a second current flowing across the tube.

Pneumatic Tubes Used at Drive-Through Banks, 1900s Yep, these still exist. Wikimedia Commons ET3's Elevated Tube, 2000s The closest sibling to Musk's Hyperloop is probably ET3's Elevated Tube .

While at the Raytheon Corp., he worked on magnetrons — vacuum tubes that produce microwave radiation and are used in radar systems. In 1941, he devised a more efficient way to manufacture them.

The vacuum tube. You might remember it from the first time humans invented it, way back in 1904. Yes, the vacuum tube, hallmark of early 20th century electronics and CRT TVs, ...