Plunger vacuums

These are among the most common of the non electric vacuum cleaners. Some people believe this style of cleaner is from the 1800s. In actuality, the plunger vacuum made its appearance after 1900. There may be a few exceptions, but most of them were sold under a patent license that dates from December 26, 1911. They are normally long, slender cylinders that taper at the bottom of the machine with a nozzle connected at the end which contacts the floor. A plunger handle at the top of the cleaner is drawn upward with one hand, while the other hand stabilizes the machine. This action develops suction as air is drawn into the nozzle when the plunger seal moves up through the cleaner’s body. If you can visualize a hypodermic needle in action as a nurse draws a blood sample, you will notice that these machines work on the same principle. Dust was sucked into a small diameter tube where it entered the center of the body. After the dust fell to the side of the cleaner’s interior, it was trapped in the funnel shaped part of the machine. In addition, a cloth air filter, above the containment area, was incorporated into the design.