Phonograph: Difference between revisions
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'''''This article is a stub. You can help the GHN by expanding it.''''' | <p>'''''This article is a stub. You can help the GHN by expanding it.''''' </p> | ||
[[Thomas Edison at Menlo Park|Menlo Park, New Jersey]]. Using ideas he mentioned in a patent for telephony improvements filed on 30 July 1877 (the recording of sound by transverse indentations in a v-shaped groove in a paper tape or on a sheet of tinfoil wrapped on a cylinder), [[Thomas Alva Edison|Edison]] drew a sketch for the phonograph on 29 November 1877 that was used to make a working model a few days later. The device was demonstrated to Scientific American on Dec. 7. Edison filed for a patent on Dec 15th. And the invention was announced publicly in Scientific American on Dec. 22nd. | <p>[[Thomas Edison at Menlo Park|Menlo Park, New Jersey]]. Using ideas he mentioned in a patent for telephony improvements filed on 30 July 1877 (the recording of sound by transverse indentations in a v-shaped groove in a paper tape or on a sheet of tinfoil wrapped on a cylinder), [[Thomas Alva Edison|Edison]] drew a [[Edison Sketches Phonograph|sketch for the phonograph]] on 29 November 1877 that was used to make a working model a few days later. The device was demonstrated to Scientific American on Dec. 7. Edison filed for a patent on Dec 15th. And the invention was announced publicly in Scientific American on Dec. 22nd. </p> | ||
[[Category:Power,_energy_&_industry_application|Category:Power,_energy_&_industry_application]] [[Category:Consumer_electronics]] [[Category:Audio_systems]] | <p>[[Category:Power,_energy_&_industry_application|Category:Power,_energy_&_industry_application]] [[Category:Consumer_electronics]] [[Category:Audio_systems]]</p> | ||
Revision as of 17:11, 15 June 2010
This article is a stub. You can help the GHN by expanding it.
Menlo Park, New Jersey. Using ideas he mentioned in a patent for telephony improvements filed on 30 July 1877 (the recording of sound by transverse indentations in a v-shaped groove in a paper tape or on a sheet of tinfoil wrapped on a cylinder), Edison drew a sketch for the phonograph on 29 November 1877 that was used to make a working model a few days later. The device was demonstrated to Scientific American on Dec. 7. Edison filed for a patent on Dec 15th. And the invention was announced publicly in Scientific American on Dec. 22nd.
