-
1 Pratt, Thomas Willis
SUBJECT AREA: Civil engineering[br]b. 4 July 1812 Boston, Massachusetts, USAd. 10 July 1875 Boston, Massachusetts, USA.[br]American civil engineer, inventor of the Pratt truss.[br]The son of Caleb and Sally Pratt, Thomas Pratt attended public school in Boston before going on to the Rensselaer School (now the Rensselaer Polytechnic Institute) in Troy, New York. While at school, his spare time was spent assisting his father, a well-known architect, in his practice. He is said to have drawn a complete set of plans for a substantial house when only 12 years old. At the conclusion of his studies, he was offered a teaching position at Rensselaer but turned it down as he was planning an engineering career; he became a government assistant on the construction of dry docks at Charleston, South Carolina, and Norfolk, Virginia.After this experience of government work, he turned to railroad construction, first with the Boston and Lowell and Boston and Maine railroads, followed by many others. In this work, he became involved in bridge construction, mostly as consulting engineer. His best-known bridge was that over the Merrimack River at Newburyport, Massachusetts, which he built with six long timber spans and a metal drawspan. He also invented a new method of ship propulsion, a form of steam boiler, an equalizer for drawbridge supports and an improved form of combined timber and steel truss; he is best known, however, for the Pratt truss. This did not truly come into its own until the inception of all-metal construction for bridges, by which time it was too late for Pratt to gain much financial reward from it.[br]Further ReadingD.B.Steinman and S.R.Watson, 1941, Bridges and their Builders, New York: Dover Books.D.Malone (ed.), Dictionary of American Biography, New York: Charles Scribner.IMcN
См. также в других словарях:
Merrimack River — Einzugsgebiet des Merrimack River Daten … Deutsch Wikipedia
Merrimack River — For similarly named articles see Merrimack (disambiguation), Merrimac (disambiguation) and Meramec (disambiguation). Coordinates: 42°49′10″N 70°48′43″W / 42.81944°N 70.81194°W … Wikipedia
Merrimack River Tower — is a proposed building in Manchester, New Hampshire. The height proposed is to be 479 feet. The building is to be constructed of black New Hampshire granite, and will be a skinny like tower with a 52 foot tall antenna for the local news station.… … Wikipedia
Merrimack River — River, northeastern U.S. Rising in the White Mountains of central New Hampshire, it flows south into Massachusetts, then turns northeast and empties into the Atlantic Ocean after a total course of 110 mi (177 km). The main cities along the river… … Universalium
Merrimack River — noun a river that rises in south central New Hampshire and flows through Concord and Manchester into Massachusetts and empties into the Atlantic Ocean • Syn: ↑Merrimack • Instance Hypernyms: ↑river • Part Holonyms: ↑New Hampshire, ↑Granite State … Useful english dictionary
Salmon Brook (Merrimack River) — Infobox River | river name = Salmon Brook origin = Martins Pond mouth = Merrimack River basin countries = USA length = 17.5 miles elevation = 280 feet at Groton, Massachusetts discharge = 150 ft³/s watershed = 36 square miles Salmon Brook is one… … Wikipedia
Coast Guard Station Merrimack River — Part of 1st District Newburyport, Massachusetts Type Coast Guard Station Coordinates … Wikipedia
Little River (Merrimack River) — The Little River is a 12.9 mile long (20.8 km) river located in New Hampshire and Massachusetts in the United States. It is a tributary of the Merrimack River, part of the Gulf of Maine watershed.The Little River rises in Kingston, New Hampshire … Wikipedia
Beaver Brook (Merrimack River) — Beaver Brook is a convert|30.7|mi|km|lk=on|adj=on river located in New Hampshire and Massachusetts in the United States. It is a tributary of the Merrimack River, part of the Gulf of Maine watershed. Beaver Brook rises in Chester, New Hampshire,… … Wikipedia
Black Brook (Merrimack River) — Black Brook is an 11.4 mile long (18.3 km) [ [http://www.granit.sr.unh.edu New Hampshire GRANIT state geographic information system] ] stream located in southern New Hampshire in the United States. It is a tributary of the Merrimack River, which… … Wikipedia
Merrimack, New Hampshire — Town Seal … Wikipedia
