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.
Kirby Company
The Vacuette Electric, introduced in 1925 with its removable floor nozzle and handle, became the forerunner of today's multi-attachment Kirby vacuum models. In 1935, the company introduced the Kirby Model C, the first product to carry Jim Kirby's name. The Vacuette was also briefly offered as a manual vacuum cleaner, utilizing a spring-loaded worm gear driven by pulling the vacuum cleaner backwards, then when pushing the machine forward, the worm gear would power a turbine that provided the suction needed. As long as the cleaner was consistently pulled backwards, tension in the spring would remain constant and the turbine would continue spinning. It was designed for rural areas that didn't have electricity, and was very similar to the carpet sweeper.