November 29, 1877 - Thomas Edison released his first invention - a hand-held gramophone

The witnesses were unbelievable about this invention and considered it a magic thing, since then Edison began to be called "The Wizard in Menlo Park, New Jersey", where he lived.

November 29, 1877 - Thomas Edison unveils a hand-turned gramophone, his first invention

Thomas Alva Edison (February 11, 1847 - October 18, 1931) was an inventor and merchant who developed a lot of devices that greatly influenced life in the 20th century. He was named by a journalist. " Sorcerer Master in Menlo Park ", he was one of the first inventors to apply the principles of mass production to the creative process, and thus could be considered to have created a public research lab. First career.

Some inventions were attributed to him, although he was not the first person to have that idea, but after the first patent was changed it became his (the most famous was the light bulb), in fact is the work of many people inside his company. However, Edison is considered one of the most inventive inventors in history, he holds 1,093 patents in the United States under his name, as well as patents in the United Kingdom, France, and Germany (gross plus 1,500 inventions worldwide.

On November 29, 1877, he introduced to the public his first invention as a hand-turned gramophone . The witnesses were unbelievable about this invention and considered it a magic thing, since then Edison began to be called " The Wizard in Menlo Park, New Jersey ", where he lived. His first phonograph recorded the sound on tin-lined poles for low sound quality and it destroyed the recording track when listening again so it could only be heard once. In the 1880s, a redesigned model used beeswax-coated cardboard posts made by Alexander Graham Bell, Chichester Bell, and Charles Tainter. This is one reason why Thomas Edison continues to work to create his own "Perfect Singing Machine ".

By wrapping tin foil around the cylinder, and thanks to a needle that vibrates according to the vibrations of the sound creating grooves with different depths on the tin he has recorded the song 'Mary had a little lamb '. And by using a needle and diaphragm (diaphragm), Edison recreated the recording. When conducting research on Edison electric bulbs, he forgot this invention for several years. Only then, when he regained his passion for the reproduction of sound, did he invent a series of cylindrical cylinders by creating a monolithic mold of the original cylinder through electroplating.

In 1887, Edison continued to develop a series of cylindrical rotary tube recorders. This process lasted until 1890 when he used a type of wax that, when put into a mold, could shrink at cool, making it easy to remove. Now a type of gramophone invented by Emil Berliner based on Edison's own principle began to dominate the market, a difference being that the device could record the vibrations of sound on the zinc plate instead. because on cylindrical rotors. The device is called a recorder , it creates grooves on the plane of the disc. Sound replacements will be recorded through spiral-shaped grooves of constant depth on a flat disc. Berliner calls this disc a recording disc.

Early recording and cylindrical recording discs were capable of producing sound of similar quality, although in theory, Edison's cylindrical cylinders had a recording time of 2 to 4 minutes, collected at 160 rpm. The Berliner disk runs at 60 rpm for 2 minutes. All is just enough to record a single piece of music! Sound recording and pronunciation are done entirely mechanically in the presence of a large and glossy metal trumpet. When recording, the trumpet is responsible for 'gathering' the sound again to create a large pressure for the recorded needle. Conversely, when pronouncing, people must use the trumpet in the opposite direction to amplify the sound to the level of audibility.

Although cylindrical cylinders and record discs coexist during the first decade of the 20th century, it is easy to see that the disc is easier to put into mass production. Until 1913, the record became overwhelming and the cylindrical spinning machine was no longer produced. Dance music became popular, musicians were quickly formed to meet demand. Edison again designed the thick disk for dance music with adjustable grooves in the vertical direction, rotating 80 rpm.