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Chadwell O'Connor
Chadwell O'Connor (October 9, 1914 – September 5, 2007) was an American inventor and steam engine enthusiast. He is most remembered as the inventor of an improved fluid-damped tripod head, for which he won Academy Awards in 1975 and 1992. Early life and education Chadwell O'Connor came from a distinguished family. His father, Johnson O'Connor was a well-known psychometrician and pioneer in the study of aptitude testing. His mother died when he was young and his father remarried the MIT-trained architect and educator Eleanor Manning. The family lived in Boston and O'Connor often accompanied his father to his work at the General Electric factory in Lynn, Massachusetts where he acquired an interest in engineering. O'Connor attended the Stevens Institute of Technology and California Institute of Technology where he earned a degree in mechanical engineering. Shortly after graduating, World War II broke out and O'Connor joined Douglas Aircraft where he was in charge of expediting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam Locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat water in the locomotive's Boiler (power generation), boiler to the point where it becomes gaseous and its volume increases 1,700 times. Functionally, it is a steam engine on wheels. In most locomotives, the steam is admitted alternately to each end of its Steam locomotive components, cylinders in which pistons are mechanically connected to the locomotive's main wheels. Fuel and water supplies are usually carried with the locomotive, either on the locomotive itself or in a Tender (rail), tender coupled to it. #Variations, Variations in this general design include electrically powered boilers, turbines in place of pistons, and using steam generated externally. Steam locomotives were first developed in the United Kingdom of Great Britain an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silicone
In Organosilicon chemistry, organosilicon and polymer chemistry, a silicone or polysiloxane is a polymer composed of repeating units of siloxane (, where R = Organyl group, organic group). They are typically colorless oils or elastomer, rubber-like substances. Silicones are used in sealants, adhesives, lubricants, medicine, cooking utensils, thermal insulation, and electrical insulation. Some common forms include silicone oil, silicone grease, grease, silicone rubber, rubber, silicone resin, resin, and Caulking, caulk. Silicone is often confused with one of its constituent elements, silicon, but they are distinct substances. Silicon is a chemical element, a hard dark-grey semiconductor, semiconducting metalloid, which in its crystalline form is used to make integrated circuits ("electronic chips") and solar cells. Silicones are compounds that contain silicon, carbon, hydrogen, oxygen, and perhaps other kinds of atoms as well, and have many very different physical and chemical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jerkiness
Jerkiness (sometimes called strobing or choppy footage) describes the perception of individual still images while watching a motion picture. Description Motion pictures are made from still images shown in rapid sequence. Provided there is sufficient continuity between the images and provided the sequence is shown fast enough, the central nervous system interprets the sequence as continuous motion. However, some technologies cannot process or carry data fast enough for sufficiently high frame rates. For example, viewing motion pictures by Internet connection generally necessitates a greatly reduced frame rate, making jerkiness clearly apparent. In conventional cinematography, the images are filmed and displayed at 24 frames per second, at which speed jerkiness is not normally discernible. Television screens refresh at even higher frequencies. PAL and SÉCAM television (the standards in Europe) refresh at 25 or 50 (HDTV) frames per second. NTSC television displays (the standa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drag (physics)
In fluid dynamics, drag, sometimes referred to as fluid resistance, is a force acting opposite to the direction of motion of any object moving with respect to a surrounding fluid. This can exist between two fluid layers, two solid surfaces, or between a fluid and a solid surface. Drag forces tend to decrease fluid velocity relative to the solid object in the fluid's path. Unlike other resistive forces, drag force depends on velocity. Drag force is proportional to the relative velocity for low-speed flow and is proportional to the velocity squared for high-speed flow. This distinction between low and high-speed flow is measured by the Reynolds number. Drag is instantaneously related to vorticity dynamics through the Josephson-Anderson relation. Examples Examples of drag include: * Net force, Net Aerodynamic force, aerodynamic or Fluid dynamics, hydrodynamic force: Drag acting opposite to the direction of movement of a solid object such as cars, aircraft, and boat hulls. * Viscou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tripod
A tripod is a portable three-legged frame or stand, used as a platform for supporting the weight and maintaining the stability of some other object. The three-legged (triangular stance) design provides good stability against gravitational loads as well as horizontal shear forces, and better leverage for resisting tipping over due to lateral forces can be achieved by spreading the legs away from the vertical centre. Variations with one, two, and four legs are termed '' monopod'', '' bipod'', and ''quadripod'' (similar to a table). Etymology First attested in English in the early 17th century, the word ''tripod'' comes via Latin ''tripodis'' ( GEN of ''tripus''), which is the romanization of Greek (''tripous''), "three-footed" (GEN , ''tripodos''), ultimately from (''tri-''), "three times" (from , ''tria'', "three") + (''pous''), "foot". The earliest attested form of the word is the Mycenaean Greek , ''ti-ri-po'', written in Linear B syllabic script. Cultural use Many c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Minnetonka
Lake Minnetonka (Dakota language, Dakota: ''Mní iá Tháŋka'') is a lake located about west-southwest of Minneapolis, Minnesota. Lake Minnetonka has about 23 named bays and areas. The lake lies within Hennepin County, Minnesota, Hennepin and Carver County, Minnesota, Carver counties and is surrounded by 13 incorporated municipalities. At , it is Minnesota's ninth largest lake. Lake Minnetonka was formed around 10,000 years ago during the retreat of the Laurentide ice sheet. The lake consists of interconnected kettle (landform), kettle lakes, channels, and marshlands, along with 18 islands, giving it an irregular shape and of shoreline. Human habitation in the area dates back approximately 10,000 years, beginning with ancestral Paleo-Indians, Indigenous peoples. Between 3500 BCE and 1500 Common Era, CE, the Mound Builders era flourished; in the 1880s, 524 burial mounds and earthworks along the lakeshore were mapped and estimated to date from 300 BCE to 100 CE. By the 1700s, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minnehaha (steamboat)
''Minnehaha'' is a steam-powered excursion vessel on Lake Minnetonka in the U.S. state of Minnesota. The vessel was originally in service between 1906 and 1926. After being scuttled in 1926, ''Minnehaha'' was raised from the bottom of Lake Minnetonka in 1980, restored, and returned to active service in 1996. The vessel operated uninterrupted on Lake Minnetonka until 2019. It is currently stored in a maintenance facility in the town of Excelsior. History ''Minnehaha'' was built by the Twin City Rapid Transit Company (TCRT) in 1906 and provided fast and reliable transportation for the residents of Lake Minnetonka during much of the early twentieth century. She ran alongside five identical sister vessels named ''Como'', ''Harriet'', ''Hopkins'', ''Stillwater'', and ''White Bear''. TCRT had commissioned boat builder Royal C. Moore to design these "Express Boats" in 1905. Each were long, wide, drew of water, and were powered by a single coal-fired boiler and triple-expansion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minnesota Transportation Museum
The Minnesota Transportation Museum (MTM, reporting mark MNTX) is a transportation museum in Saint Paul, Minnesota, United States. MTM operates several heritage transportation sites in Minnesota and one in Wisconsin. The museum is actively involved in preserving local railroad, bus, and streetcar history. MTM was formed in 1962 to save a streetcar that had been built and operated by Twin City Rapid Transit (TCRT) in Minneapolis–St. Paul. Many of the museum's early members were formerly part of the Minnesota Railfans Association, which had organized railfan trips from the 1940s to the 1960s. In 2004–2005, the organization's streetcar operations became the Minnesota Streetcar Museum, with the steamboat ''Minnehaha'', originally built by TCRT in a style similar to its streetcars, becoming a major attraction of the Museum of Lake Minnetonka. Minnehaha Depot After the first streetcar, TCRT 1300, was successfully restored, other projects were examined in the time bef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newport Beach, California
Newport Beach is a coastal city of about 85,000 in southern Orange County, California, United States. Located about southeast of downtown Los Angeles, Newport Beach is known for its sandy beaches. The city's harbor once supported maritime industries. Today it is used mostly for recreation. Balboa Island, Newport Beach, Balboa Island draws visitors with a waterfront path and easy access from the ferry to the shops and restaurants. History The Upper Bay of Newport is a canyon carved by a stream in the Pleistocene period. The Lower Bay of Newport was formed much later by sand brought along by ocean currents, which constructed the offshore beach now recognized as the Balboa Peninsula of Newport Beach. For thousands of years, the Tongva people lived on the land in an extensive, thriving community. The Tongva villages of Genga, California, Genga and Moyongna were located in Newport Beach. The Spanish Empire colonized the land, followed by Alta California, Mexicans and Treaty of Gua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ward Kimball
Ward Walrath Kimball (March 4, 1914 – July 8, 2002) was an American animator employed by Walt Disney Animation Studios. He was part of Walt Disney's main team of animators, known collectively as Disney's Nine Old Men. His films have been honored with two Academy Awards for Best Animated Short Film. Outside of his job as an animator, Kimball was a railroad enthusiast as well as a talented jazz trombonist. He founded and led the seven-piece Dixieland band Firehouse Five Plus Two, in which he played the trombone. Early life Kimball was born on March 4, 1914, in Minneapolis. His father was a salesman who traveled widely. He grew up in the Midwest, often residing with his grandparents. Career While Kimball was a brilliant draftsman, he preferred to work on comical characters rather than realistic human designs. Animating came easily to him and he was constantly looking to do things differently. Because of this, Walt Disney called Ward a genius in the book ''The Story of Wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden Spike National Historical Park
Golden Spike National Historical Park is a United States National Historical Park located at Promontory Summit, north of the Great Salt Lake in east-central Box Elder County, Utah, United States. The nearest city is Corinne, approximately east-southeast of the site. It commemorates the completion of the first Transcontinental Railroad where the Central Pacific Railroad and the first Union Pacific Railroad met on May 10, 1869. The final joining of the rails spanning the continent was signified by the driving of the ceremonial golden spike. Background The Golden Spike National Historical Park encompasses . Initially just when it was established in 1957, limited to the area near the junction of the two rail systems, the site was expanded by in 1965 through land swaps and acquisition of approximately a strip of land mostly wide along of the former railroad right-of-way. It reached its present size in 1980. In addition to the Summit site where the rails were joined, the Park ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
