Light Bulb, Invention and Purpose Free Essays - PhDessay.com.
In 1809, English inventor Humphry Davy created the first electric light. He had connected rods made of charcoal, a form of the chemical element carbon, to a battery with two wires. Although the light didn't last long, it showed that some materials became so hot that they glow when electricity passes through them.
The first approach in the development of light bulb was made by Humphry Davy in 1802. When he connected the terminals of the battery to a carbon electrode (used as a filament), it started to glow. This glow didn’t last longer because filament burnt very quickly. His invention is known as “Electric arc lamp”.
The history of the light bulb is filled with rivalry, failures and great achievements. The electric light bulb has been called the most important invention since man-made fire. The light bulb helped to establish social order after sundown, extended the workday well into the night, and allowed us to navigate and travel safely in the dark.
A lthough Thomas Edison is credited with the invention of the light bulb in 1879, other inventors were working on various designs to produce electricity or light. In the year 1800, Alessandro Volta, an Italian inventor, was working on a way to generate electricity.
A light bulb produces light from electricity. In addition to lighting a dark space, they can be used to show an electronic device is on, to direct traffic, for heat, and for many other purposes.Billions are in use, some even in outer space. Early people used candles and oil lamps for light. Crude incandescent lights were made in the early and middle 19th century but had little use.
A number of interesting world records abound for light bulbs. For instance, the Livermore Centennial Light Bulb kept by the Livermore-Pleasanton Fire Department in Northern California is one of the world’s oldest, still operational light bulbs. It still works and has not been changed since it was first installed in1901.
In 1883, the U.S Patent Office invalidated Edison's patent but he went to court for six years and reversed the decision. During this time, he also purchased other patents related to the light bulb, most notably a 1874 patent for a light bulb invention by Canadian inventors Henry Woodward and Mathew Evans.