Linggo, Hulyo 7, 2013

WHAT WERE THE GREATEST INVENTIONS OF ALL TIME?

An aerosol spray is a canister holding a liquid under pressure from a pressurized vapor in equilibrium with a liquid which often also dissolves the payload (see propellant, below). When a valve is opened, the liquid is forced out of a small hole and emerges as an aerosol, or mist. As gas expands to drive out the payload, some propellant evaporates inside the can to maintain an even pressure. Outside the can, the droplets of propellant evaporate rapidly, leaving the payload suspended as very fine particles or droplets. Typical liquids dispensed in this way are insecticidesdeodorants and paints. An atomizer is a similar device that is pressured by a hand-operated pump rather than by stored gas.
The modern aerosol spray can was invented in 1962 by Erik Rotheim, a Norwegian engineer. Yet only in 1941 theAmericans Lyle Good hue and William Sullivan turned it into a useful device, used by military to spray the malaria mosquito during World War II.

See the full list  of greatest Inventions and inventors 



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