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Diaphragm

Edison with his early phonograph
Society: ASMEMain Category: MechanicalSub Category: Communications and Data ProcessingEra: 1870-1879DateCreated: 187737 Honeysuckle AvenueWest OrangeState: NJZip: 07052Country: USAWebsite: https://www.asme.org/about-asme/who-we-are/engineering-history/landmarks/68-edison-experimental-recording-phonographCreator: Edison, Thomas

Edison's simple and unprecedented instrument allowed for the first time the permanent recording and reproduction of sound, especially the human voice. On December 6, 1877, Edison put tinfoil around the cylinder, turned the handle of the shaft and, shouting into one of the diaphragms, recorded a verse of Mary Had a Little Lamb "almost perfectly." From this machine evolved the phonographs and record industries of the world.

YearAdded:
1981
Image Caption: Edison with his early phonographEra_date_from: 1877
Pullman Sleeping Car Glengyle
Society: ASMEMain Category: MechanicalSub Category: Rail TransportationEra: 1900-1909DateCreated: 1911Museum of the American RailroadDallasState: TXZip: 75210Country: USAWebsite: http://www.asme.org/about-asme/history/landmarks/topics-m-z/rail-transportation---2/-125-pullman-sleeping-car-glengyle-%281911%29, https://www.asme.org/getmedia/379a7270-9504-4fc0-a38d-bce7a0cea4a5/125-Pullman-Sleeping-Car-Glengyle-1911.aspxCreator: Pullman, George

The Glengyle is the earliest known survivor of the fleet of heavyweight, all-steel sleepers built by Pullman Company. The design was introduced in 1907 as a marked improvement over the wooden version then in use. Some 10,000 were built, in various configurations, the last in 1931. The Glengyle is original in its interior and most of its components.

YearAdded:
1987
Image Credit: Courtesy ASMEImage Caption: Pullman Sleeping Car GlengyleEra_date_from: 1911
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