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Society: ASMEMain Category: MechanicalEra: 1960-1969DateCreated: 1963PR-625AreciboState: PRZip: 00612Country: USAWebsite: https://www.asme.org/about-asme/who-we-are/engineering-history/landmarks/216-arecibo-radiotelescope

A drive system that keeps the antenna pointed with millimeter precision regardless of factors such as environmental change

 

The Arecibo Observatory has the largest radio telescope ever constructed.  Maintaining the greatest electromagnetic wave gathering capacity of any telescope, it has been an essential tool in modern astronomy, ionosphere and planetary studies.

YearAdded:
2001
Image Credit: Public DomainImage Caption: Arecibo Radiotelescope
NAIC/Arecibo Radiotelescope
Society: IEEEMain Category: ElectricalSub Category: SignalsEra: 1960-1969DateCreated: 1963Arecibo ObservatoryAreciboState: PRZip: 00612Country: USAWebsite: http://www.asme.org/about-asme/history/landmarks/topics-m-z/research-and-development/-216-arecibo-radiotelescope-%281963%29Creator: Gordon, William , Doundoulakis, Helias

The Arecibo Observatory has the largest radio telescope ever constructed. Maintaining the greatest electromagnetic wave gathering capacity of any telescope, it has been an essential tool in modern astronomy, ionosphere and planetary studies. Several feats of mechanical engineering went into the construction of this observatory, most notable of which is a drive system which allows all active parts of the antenna to be kept focused with millimeter precision regardless of environmental factors—such as thermal expansion.

YearAdded:
2001
Image Caption: NAIC/Arecibo RadiotelescopeEra_date_from: 1963
Hacienda La Esperanza Sugar Mill Steam Engine
Society: ASMEMain Category: MechanicalSub Category: SteamEra: 1860-1869DateCreated: 1861Conservation Trust of Puerto RicoManatíState: PRZip: 00617Country: USAWebsite: http://www.asme.org/about-asme/history/landmarks/topics-m-z/mechanical-power-production-steam/-35-hacienda-la-esperanza-sugar-mill-steam-engine, https://www.asme.org/getmedia/60f1d4d5-215e-4334-8267-a40a7372288a/35_Hacienda_La_Esperanza_Sugar_Mill_Steam_Engine.aspxCreator: Watt, James , Newcomen, Thomas

The La Esperanza sugar mill steam engine is one of the few remaining American links to the pioneer beam engines of the English inventors Thomas Newcomen (1712) and James Watt (1769). The engine was built in 1861 in Cold Spring, New York, by the West Point Foundry. The general arrangement and details, including the Gothic embellishment, are typical of machinery of the period. The straight-line motion of the piston rod is accommodated to the arc of the moving beam end by a parallel motion. Watt regarded this ingenious linkage as the invention of which he was most proud.

YearAdded:
1979
Image Credit: Public Domain (National Park Service)Image Caption: Hacienda La Esperanza Sugar Mill Steam EngineEra_date_from: 1861
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