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Most turbomolecular pumps employ multiple stages, each consisting of a quickly rotating rotor blade and stationary stator blade pair. The system is an axial compressor that puts energy into the gas, rather than a turbine, which takes energy out of a moving fluid to create rotary power, thus "turbomolecular pump" is a misnomer.
After the war, some of the inventions found new applications. The first transistor radio was released in 1954, and its manufacturing process made use of vacuum pumps. [43] The first integrated circuit or “chip” came to the market at the end of the 1950s, and vacuum pumps again played an important role in their production. These early ...
In the field of oil regeneration and re-refining, vacuum pumps create a low vacuum for oil dehydration and a high vacuum for oil purification. [44] A vacuum may be used to power, or provide assistance to mechanical devices. In hybrid and diesel engine motor vehicles, a pump fitted on the engine (usually on the camshaft) is used to produce a vacuum.
Most post-war European thermionic valve (vacuum tube) manufacturers have used the Mullard–Philips tube designation naming scheme. Special quality variants may have the letter "S" appended, or the device description letters may be swapped with the numerals (e.g. an E82CC is a special quality version of an ECC82)
Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
In December 1949, Muroc was renamed Edwards Air Force Base in honor of Captain Glen Edwards (1918–1948), who was killed a year earlier in the crash of the Northrop YB-49 Flying Wing. [6] During World War II , he flew A-20 Havoc light attack bombers in the North African campaign on 50 hazardous, low-level missions against German tanks, convoys ...
Rebirth of the Edwards Company came in the fall of 1997 when Vintage Rail Consultant Steven Torrico saw and rode on his first Edwards car, an ex-CB&Q Model-25. 2008 was the last year of manufacturing at the Montgomery facility. As of 12/1/08 Edwards Rail Car no longer manufacturers rail cars at the Montgomery facility.
Mary Elizabeth Anania Edwards (July 3, 1949 – December 7, 2010) was an American attorney, author, and health care activist. She was married to John Edwards , the former U.S. Senator from North Carolina who was the Democratic vice-presidential nominee in the 2004 U.S. presidential election .
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