Phonograph: Difference between revisions
From ETHW
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
'''''This article is a stub. You can help the GHN by expanding it.''''' | '''''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. | [[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. | ||
[[Category:Power | [[Category:Power,_energy_&_industry_application|Category:Power,_energy_&_industry_application]] [[Category:Consumer_electronics]] [[Category:Audio_systems]] | ||
[[Category:Consumer_electronics]] | |||
[[Category:Audio_systems]] | |||
Revision as of 20:34, 2 February 2009
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.
