The life and inventions of thomas alva edison

Read the following text. Edison's early life Thomas Alva Edison was an American inventor and businessman. He was born on February 11,

The life and inventions of thomas alva edison

He was the seventh and last child of Samuel Ogden Edison Jr. By contrast, Samuel Jr. Once across the border, he found his way to Milan, Ohio.

His patrilineal family line was Dutch by way of New Jersey; the surname had originally been "Edeson. The cause of his deafness has been attributed to a bout of scarlet fever during childhood and recurring untreated middle-ear infections.

Around the middle of his career, Edison attributed the hearing impairment to being struck on the ears by a train conductor when his chemical laboratory in a boxcar caught fire and he was thrown off the train in Smiths Creek, Michiganalong with his apparatus and chemicals.

In his later years, he modified the story to say the injury occurred when the conductor, in helping him onto a moving train, lifted him by the ears. He became a telegraph operator after he saved three-year-old Jimmie MacKenzie from being struck by a runaway train.

Jimmie's father, station agent J. MacKenzie of Mount Clemens, Michiganwas so grateful that he trained Edison as a telegraph operator. He also studied qualitative analysis and conducted chemical experiments on the train until he left the job.

These talents eventually led him to found 14 companies, including General Electricstill one of the largest publicly traded companies in the world.

Early Inventions

Edison requested the night shift, which allowed him plenty of time to spend at his two favorite pastimes—reading and experimenting.

Eventually, the latter pre-occupation cost him his job. One night inhe was working with a lead—acid battery when he spilled sulfuric acid onto the floor. It ran between the floorboards and onto his boss's desk below.

The next morning Edison was fired. Some of Edison's earliest inventions were related to telegraphy, including a stock ticker. His first patent was for the electric vote recorder, U.

The life and inventions of thomas alva edison

Patent 90,which was granted on June 1, Edison's major innovation was the establishment of an industrial research lab in Edison was legally attributed with most of the inventions produced there, though many employees carried out research and development under his direction.

His staff was generally told to carry out his directions in conducting research, and he drove them hard to produce results. William Joseph Hammera consulting electrical engineer, started working for Edison and began his duties as a laboratory assistant in December He assisted in experiments on the telephone, phonograph, electric railway, iron ore separatorelectric lightingand other developing inventions.

However, Hammer worked primarily on the incandescent electric lamp and was put in charge of tests and records on that device see Hammer Historical Collection of Incandescent Electric Lamps. Inhe was appointed chief engineer of the Edison Lamp Works.

According to Edison, Hammer was "a pioneer of incandescent electric lighting". Spraguea competent mathematician and former naval officerwas recruited by Edward H.

Johnson and joined the Edison organization in Despite the common belief that Edison did not use mathematics, analysis of his notebooks reveal that he was an astute user of mathematical analysis conducted by his assistants such as Francis Robbins Upton, for example, determining the critical parameters of his electric lighting system including lamp resistance by an analysis of Ohm's LawJoule's Law and economics.

About a dozen were design patentswhich protect an ornamental design for up to a year period. As in most patents, the inventions he described were improvements over prior art. The phonograph patent, in contrast, was unprecedented as describing the first device to record and reproduce sounds.

Edison said he wanted the lab to have "a stock of almost every conceivable material". With Menlo Park, Edison had created the first industrial laboratory concerned with creating knowledge and then controlling its application. Problems playing this file?

Thomas Edison’s Early Life

Edison began his career as an inventor in Newark, New Jerseywith the automatic repeater and his other improved telegraphic devices, but the invention that first gained him wider notice was the phonograph in Despite its limited sound quality and that the recordings could be played only a few times, the phonograph made Edison a celebrity.

Joseph Henrypresident of the National Academy of Sciences and one of the most renowned electrical scientists in the US, described Edison as "the most ingenious inventor in this country Carbon telephone transmitter InEdison began work to improve the microphone for telephones at that time called a "transmitter" by developing a carbon microphonewhich consists of two metal plates separated by granules of carbon that would change resistance with the pressure of sound waves.

A steady direct current is passed between the plates through the granules and the varying resistance results in a modulation of the current, creating a varying electric current that reproduces the varying pressure of the sound wave.

Up to that point, microphones, such as the ones developed by Johann Philipp Reis and Alexander Graham Bellworked by generating a weak current. The carbon microphone works by modulating a direct current and, subsequently, using a transformer to transfer the signal so generated to the telephone line.The Life and Inventions of Thomas Alva Edison (Classic Reprint) [William Kennedy Laurie Dickson] on *FREE* shipping on qualifying offers.

Excerpt from The Life and Inventions of Thomas Alva Edison Automatic and chemical telegraphy. Statistics OF speed. Discovery and applications OF electro-motograph and carbon button.

The carbon William Kennedy Laurie Dickson. Everyone thinks of light bulbs when they hear Thomas Alva Edison's name. His creative genius, though, came through in his numerous other inventions, from the electrical power system and the phonograph that could record and play back sound, to motion picture technology and storage batteries (he believed in electric cars!).

Wanting to be an inventor, but not having much of an aptitude for it, Thomas Edison's son, Thomas Alva Edison Jr.. became a problem for his father and his father's business. Edison, His Life and Inventions at Project Gutenberg by Frank Lewis Dyer and Thomas Commerford Martin.

Watch video · Thomas Edison’s inventions included the telegraph, the universal stock ticker, the phonograph, the first commercially practical incandescent electric light bulb, alkaline storage batteries and.

Thomas Alva Edison was born February 11, in Milan, Ohio (pronounced MY-lan). In , when he was seven, the family moved to Michigan, where Edison spent the rest of his childhood. "Al," as he was called as a boy, went to school only a short time. Thomas Alva Edison was born on February 11, in Milan, Ohio; the seventh and last child of Samuel and Nancy Edison.

When Edison was seven his family moved to Port Huron, Michigan. Edison lived here until he struck out on his own at the age of sixteen.

The life and inventions of thomas alva edison
Thomas Edison's Inventive Life | Lemelson Center for the Study of Invention and Innovation