When did Thomas A. Edison invent the light bulb?

Answer 1

Throughout the 1800s, many scientists and inventors strove to create a cost effective, practical, long-life incandescent light bulb. The primary hurdle was creating a long-lived, high-temperature filament--the key to a practical incandescent light. Many high-melting-point materials were explored in inert/evacuated chambers in the process.

Men such as William Robert Grove, Frederik de Moleyns, W.E. Staite, John Daper, Edward G. Shepard, Heinrich Gobel, C. de Chagny, John T. Way, Alexander de Lodyguine, Joseph Wilson Swan, and Thomas A. Edison dedicated their time and efforts in the race to develop the first practical incandescent light bulb. Breakthroughs for Edison and Swan came in 1879, when they independently developed the first incandescent lamp that lasted a practical length of time -- at best a mere 13.5 hours. Their separate designs were based on a carbon fiber filament derived from cotton. The next stage of development focused on extending the practical life of the carbon filament bulb. Edison developed bamboo-derived filaments in 1880 that lasted up to 1200 hours.

Answer 2

No. He perfected it and made it commercially producible... Henry Woodward substitute into an early pioneer interior the form of the incandescent lamp. On July 24, 1874, he and his significant different, Mathew Evans, a inn keeper, patented a larger electric easy bulb. Sir Joseph Wilson Swan (31 October 1828 – 27 would 1914) substitute into an English physicist and chemist, maximum nicely known for the invention of the incandescent easy bulb for which he gained a patent in 1878. His domicile substitute into the 1st interior the worldwide to be lit via a easy bulb. The inventor Thomas Alva Edison experimented with hundreds of distinctive filaments to discover in simple terms the outstanding substances to glow nicely and be long-lasting. In 1879, Edison got here upon that a carbon filament in an oxygen-loose bulb glowed yet did no longer dissipate for 40 hours. Edison finally produced a bulb that would desire to glow for over 1500 hours.

Answer 3

1879 he invented the first commercially practical incandescent electric lamp. The lamp itself was perfected on October 21st, 1879, on which day there was put into circuit the first bulb embodying the principles known as the "Edison modern incandescent lamp." This bulb maintained its incandescence for over 40 hours.

Answer 4

December 31, 1879

Answer 5

1879

Answer 6

1492. Or was it 1974? One of those is right, I think.