Old check your facts,Deforest applied for a patent on a diode vacuum tube in jan 1906.It was a variant of the Fleming diode invented 2 years earlier.Later Deforest added a third element to the tube.Some say he dicovered that the third element could control the electron flow in the tube.Some say he discovered this by accident.It appears that Fleming did not apply for a patent on his discovery,Fleming may have been in England.I got interested in radio in 1948 or so.At 18 I was doing TV service calls for Franklin Radio Co.The owner Peter Rometti had worked on the developement of radar.Pete was a skilled Machinest and had a metal lathe in the TV shop.He taught me the basics of running a metal lathe and using measureing tools.By the way Pete was called Edison in his high school year book.Color tv was just taking hold in the early 60s.My merories of what happened 60 years ago are growing dim but I do remembor Fleming was first with the vacuum tube.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let�s make one more addition to our series on hydraulics. I�ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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