Vacuum cleaner
The vacuum cleaner evolved from the carpet sweeper via manual vacuum cleaners. The first manual models, using bellows, were developed in the 1860s, and the first motorized designs appeared at the turn of the 20th century, with the first decade being the boom decade.
Jacob Leupold
In 1701 Leupold obtained a position as an economist in George Military Hospital, thus ensuring a regular income but not enough free time to dedicate himself to mechanics.
In the 17th century, the main instruments for experimental physics were the telescope, the microscope, the pendulum clock and the vacuum pump, invented in 1656 by Otto von Guericke. Leupold is also credited as an early inventor of air pump. He designed his first pump in 1705, in 1707 he published a book "Antlia pneumatica illustrata". In 1711 following the advice of its president G. W. Leibniz, the Prussian Academy of Sciences acquired Leupold's pump. In 1715 Leupold became a member of academy. In 1720 Leupold started to work on the manuscript of Theatrum Machinarum. It was the first systematic analysis of mechanical engineering. It included, ahead of its time, a design for a high-pressure non-condensing steam engine, the likes of which were not built until the early 19th century.
Theatrum machinarum consists of 10 illustrated volumes. It was published in Leipzig between 1724-1739.