- February 19 -

Edison's Phonograph Patented

Patent for Phonograph Issued February 19, 1878 One of Edison's first great inventions Washington - Thomas A. Edison, one of the outstanding geniuses in the history of technology, received patent no. 200,521 for a phonograph on February 19, 1878. This patent is just one of the more than one...

Edison's Phonograph Patented

Patent for Phonograph Issued February 19, 1878 One of Edison's first great inventions
Washington - Thomas A. Edison, one of the outstanding geniuses in the history of technology, received patent no. 200,521 for a phonograph on February 19, 1878. This patent is just one of the more than one thousand Edison was granted for his inventions.

Edison was exceptionally inquisitive, and while tinkering with the telegraph transmitter he discovered that when played back at high speeds, the tape sounded like spoken words. He figured out that the human voice, and other sounds, could cause a light material plate to vibrate. And, when properly placed, a needle could indent the plate, recording the vibrations, and found that yet another needle could play them back. He eventually rigged a tinfoil cylinder and a stylus with which he recorded, 'Mary Had a Little Lamb.'

Edison's inventions have been a mainstay of our economy for over 100 years. At the turn of the 20th century, Edison's New Jersey laboratory (now a national monument), was the hub around which factories employing 5,000 people produced new products, including the mimeograph, the fluoroscope, the alkaline storage battery, dictating machines, and motion picture cameras and projectors. The electric light bulb, his most famous invention, was the foundation for today's General Electric Company.
Source:
http://www.uspto.gov/news/pr/2002/02-13.jsp

Categories:

You may also like...

Interesting events from Science category.

First Untethered Spacewalk

>Bruce McCandless II and Robert L. Stewart astronauts made the first untethered spacewalks in history during Space Shuttle mission STS-41B. McCandless and Stewart used their nitrogen-propelled manned maneuvering units (MMUs) to make the first space walk unattached to any orbital vehicle....

Pluto Discovered

Pluto, formal designation 134340 Pluto, is the second-most-massive known dwarf planet in the Solar System (after Eris) and the tenth-most-massive body observed directly orbiting the Sun. Originally classified as the ninth planet from the Sun, Pluto was recategorized as a dwarf planet and plutoid...

Pistol Patent Day

A Colt Paterson is a revolver. It was the first commercial repeating firearm employing a revolving cylinder with multiple chambers aligned with a single, stationary barrel. Its design was patented by Samuel Colt on February 25, 1836, in the United States, France, and England, and it derived its...

Sofia Kovalevskaya Math Day

Today we are celebrate the life of Sofia Kovalevskaya and the contributions she made to mathmatics. This holiday is also a grant-making program of the Association for Women in Mathematics (AWM), funding workshops which encourage girls to explore mathematics. Sofia Vasilyevna...

Bell Patents the Telephone

Where would we be without the telephone? 29-year-old Alexander Graham Bell patented the first telephone March 7, 1876. The first phone call to his assistant was March 10th, 1876. The Scottish-born Bell worked in London with his father, Melville Bell, who developed Visible Speech, a written...

NASA Announced the First Astronauts

On April 9, 1959, the National Aeronautics and Space Administration (NASA) introduces America's first astronauts to the press: Scott Carpenter, L. Gordon Cooper Jr., John H. Glenn Jr., Virgil "Gus" Grissom, Walter Schirra Jr., Alan Shepard Jr., and Donald Slayton. The seven men, all military test...

Download KeepIn Calendar

Enjoy the interesting stories even on your phone or tablet