Vacuum engineering
Vacuum technology is a method used to evacuate air from a closed volume by creating a pressure differential from the closed volume to some vent, the ultimate vent being the open atmosphere. When using an industrial vacuum system, a vacuum pump or generator creates this pressure differential. A variety of technical inventions were created based on the idea of vacuum discovered during the 17th century. These range from vacuum generation pumps to X-ray tubes, which were later introduced to the medical field for use as sources of X-ray radiation. The vacuum environment has come to play an important role in scientific research as new discoveries are being made by looking back to the basic fundamentals of pressure. The idea of “perfect vacuum” cannot be realized, but very nearly approximated by the technological discoveries of the early 20th century. Vacuum engineering today uses a range of different material, from aluminum to zirconium and just about everything in between. There may be the popular belief that vacuum technology deals only with valves, flanges, and other vacuum components, but novel scientific discoveries are often made with the assistance of these traditional vacuum technologies, especially in the realm of high-tech. Vacuum engineering is used for compound semiconductors, power devices, memory logic, and photovoltaics.
Henry (vacuum)
Numatic vacuums with faces on the body/canister (Numatic Henrys did not actually say "Henry" on the cap until 1981) were invented first in 1979, 123 years after the first invention of the vacuum. In 1981, the first Numatic model to say a name on the cap (Henry) was created. The first model of Henry started as somewhat of a toy, with the functionality of a vacuum. The face appealed to children and adults alike, and was very popular for its lovable face. Henry was also one of the first vacuums to use Microfiber dust bags, which are large capacity dust bag known as HEPA-FLO bags which are made of a strong material that carry dust and other unwanted materials into the HEPA-FLO and stay in there unlike any paper bags which tend to rip and leak dust. Since the introduction of Henry in 1981, it has sold 7-8 million units, with around 20,000 more being sold each week (roughly 2857 per day). In 2017, the EU introduced a new law that gave vacuum cleaners a limit to their wattage, making 900W the maximum.. This required Numatic to change about 80% of their vacuums, because most of them were 1200W. The new law was meant to conserve power, and also bringing the average cost of vacuum cleaning per year from £11 to £7.