Nowadays, the couples who owe have of very young children do not find necessarily the time to take care of all the domestic tasks and are easily overwhelmed by the dishes which accumulates, the housework not makes and their jobs. So, a person succeeded has to find a playful means to relieve them of a certain task in particular. This invention is not marketed yet and stays in the stage of prototype today.
The trotter for baby has a simple principle: help the baby to get acquainted with the stages of the acquisition of the walking. Its main criterion of acquisition has to assure the safety of the child. Furthermore, the fact of using the trotter frequently contributes to the development of the muscles of its legs and allows him to find more easily the point of balance necessary for the walking. Now, we can speak about the second point of our demonstration. A vacuum cleaner, commonly referred to as a vacuum in the U.S. and usually as a hoover in the UK, is a device that uses an air pump to create a partial vacuum to suck up dust and dirt, usually from floors. The dirt is collected by either a dustbag or a cyclone for later disposal.
The first vacuum cleaner was invented in 1869 by Ives W. McGaffey, in Chicago but the object was not very easy of use. Indeed, to put on it, it was necessary to turn a crank, which activated the mechanism of inhalation.
After some bad experiences, the first motorized domestic vacuum cleaner comparable to the current vacuum cleaners was created 1905 by Walter Griffiths, and was called "Griffith's Improved Vacuum Apparatus for Removing Dust from Carpets". He can be used by a single person and was easily transportable.
It was marketed for the first time by William Hoover (where from the name), and was equipped with a rotating brush to unstick the dust more easily. Hoover remains today one of a leader world of the vacuum cleaner.
Vacuum cleaners, which are used in homes as well as in industry, exist in a variety of sizes and models: