Template:Selected anniversaries/December 24: Difference between revisions

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||1872: William John Macquorn Rankine dies ... physicist and engineer. Pic.
||1872: William John Macquorn Rankine dies ... physicist and engineer. Pic.
||1877: Robert Parker Parrott dies ... American soldier and inventor of military ordnance. Pic search: https://www.google.com/search?q=Robert+Parker+Parrott


File:Thomas Edison.jpg|link=Thomas Edison (nonfiction)|1877: [[Thomas Edison (nonfiction)|Thomas Edison)]] files for a patent on the phonograph. The idea came to him while working on a telegraph transmitter, when he noticed that when the tape of the machine was played at high speed, it gave off a noise resembling spoken words. After experimenting with a needle attached to the diaphragm of a telephone receiver to prick paper tape to record a message, his idea evolved to using a stylus on a tinfoil cylinder.
File:Thomas Edison.jpg|link=Thomas Edison (nonfiction)|1877: [[Thomas Edison (nonfiction)|Thomas Edison)]] files for a patent on the phonograph. The idea came to him while working on a telegraph transmitter, when he noticed that when the tape of the machine was played at high speed, it gave off a noise resembling spoken words. After experimenting with a needle attached to the diaphragm of a telephone receiver to prick paper tape to record a message, his idea evolved to using a stylus on a tinfoil cylinder.

Revision as of 07:20, 28 November 2019