Domestic Things and TechNology

A   clothes iron   is a roughly triangular surface that, when heated, is used to press clothes to remove   creases . It is named for the metal of which the device was historically commonly made, and the use of it is generally called   ironing . Ironing works by loosening the ties between the long chains of molecules that exist in   polymer   fiber materials. With the heat and the weight of the ironing plate, the fibers are stretched and the fabric maintains its new shape when cool. Some materials, such as cotton, require the use of water to loosen the inter-molecular bonds. Many materials developed in the twentieth century are advertised as needing little or no ironing. Before the introduction of electricity, irons were heated by combustion, either in a fire or with some internal arrangement. An "electric flatiron" was invented by US inventor Henry W. Seeley and patented on June 6, 1882. It weighed almost 15 pounds and took a long ti...

A doorbell is a signaling device typically placed near a door to a building's entrance. When a visitor presses a button the bell rings inside the building, alerting the occupant to the presence of the visitor.