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Hoberman Sphere
A Hoberman sphere is an isokinetic structure patented by Chuck Hoberman that resembles a geodesic dome, but is capable of folding down to a fraction of its normal size by the scissor-like action of its joints. Colorful plastic versions have become popular as children's toys: several toy sizes exist, with the original design capable of expanding from in diameter to . Description A Hoberman sphere typically consists of six great circles corresponding to the edges of an icosidodecahedron. The Hoberman sphere can be unfolded by allowing certain members to spread apart. The operation of each joint is linked to all the others in a scissors mechanism like those used to mount pantograph mirrors, or how a folding chair operates. In larger models, this can be accomplished by feeding out a string or cable instead. The largest existing Hoberman sphere is in the AHHAA Science Center in Tartu, Estonia. Fully expanded, it is in diameter. The motorized sphere weighs , is constructed of airc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoberman Sphere, Chuck Hoberman 1995 (4098441855)
Hoberman is a surname. Notable people with the surname include: *Ben Hoberman (1922–2014), American radio executive *Brent Hoberman, founder of Lastminute.com *Chuck Hoberman, American designer and architect *David Hoberman (born 1952), American film producer *Haggai Hoberman, Israeli journalist and author *J. Hoberman, American film critic *John Hoberman, Professor of Germanic languages at the University of Texas at Austin *John Milton Hoberman, American author *Mary Ann Hoberman (born 1930), American writer *Nicky Hoberman (born 1967), South African artist *Perry Hoberman, American artist See also *Hoberman Arch *Hoberman sphere {{surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AHHAA
Science Centre AHHAA (Estonian language, Estonian: ''Teaduskeskus AHHAA'') is a science centre located in Tartu, Estonia, and is currently the largest science centre in the Baltic states. AHHAA was established to promote science and technology using interactive exhibits. Since 7 May 2011, Science Centre AHHAA has been in the building located in the centre of Tartu. History AHHAA was established as a project of the University of Tartu on 1 September 1997. Since 2004 it has operated as a Foundation (nonprofit), foundation constituted by the city of Tartu and the University of Tartu. The activities of the Science Centre AHHAA Foundation are coordinated by a committee composed of Katrin Pihor, Hannes Astok, Aune Valk, Reno Laidre and Jaanika Anderson. Additionally, the practical aspects of the activities of the foundation are appraised by a science committee composed of experts. AHHAA is governed by the board consisting of two members. Tiiu Sild was the head of the board until 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linkages (mechanical)
Linkage may refer to: * ''Linkage'' (album), by J-pop singer Mami Kawada, released in 2010 * Linkage (graph theory), the maximum min-degree of any of its subgraphs * Linkage (horse), an American Thoroughbred racehorse * Linkage (hierarchical clustering), The linkage criterion determines the distance between sets of observations as a function of the pairwise distances between observations * Linkage (linguistics), a set of languages descended from a former dialect continuum *Linkage (mechanical), assemblies of links designed to manage forces and movement *Linkage (policy), a Cold War policy of the United States of America towards the Soviet Union and Communist China *Linkage (software), a concept in computer programming * Genetic linkage, the tendency of certain genes to be inherited together *Glycosidic linkage, a type of covalent bond that joins a carbohydrate (sugar) molecule to another chemical group *Flux linkage In circuit theory, flux linkage is a property of a two-terminal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Google Patents
Google Patents is a search engine from Google that indexes patents and patent applications. Contents Google Patents indexes more than 87 million patents and patent applications with full text from 17 patent offices, including: * United States Patent and Trademark Office (USPTO), * European Patent Office (EPO), * China's National Intellectual Property Administration (CNIPA), * Japan Patent Office (JPO), * Korean Intellectual Property Office (KIPO), * World Intellectual Property Organization (WIPO), * Deutsches Patent- und Markenamt (DPMA), * Canadian Intellectual Property Office (CIPO), * Rospatent, * Intellectual Property Office (United Kingdom), * National Institute of Industrial Property (France), * the Netherlands Patent Office, * offices of Spain, Belgium, Denmark, Finland, and Luxembourg. These documents include the entire collection of granted patents and published patent applications from each database (which belong to the public domain). US patent documents date b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoberman Mechanism
A Hoberman mechanism, or Hoberman linkage, is a deployable mechanism that turns linear motion into radial motion. The Hoberman mechanism is made of two angulated ridged bars connected at a central point by a revolute joint, making it move much like a scissor mechanism. Multiple of these linkages can be joined together at the ends of the angulated bars by more revolute joints, expanding radially to make circle shaped mechanisms. The mechanism is a GAE (generalize angulated element) where the coupler curve is a radial straight line. This allows the Hoberman mechanism to act with a single degree of freedom, meaning that it is an over-constrained mechanism because the mobility formula predicts that it would have a smaller degree of freedom than it does, as the mechanism has more degrees of freedom than the mobility formula predicts. The kinematic theory behind the Hoberman mechanism has been used to help further the understanding of mobility and foldability of deployable mechanisms. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swiss Science Center Technorama
The Swiss Science Center Technorama (Swiss German native name: Technorama) is a science museum in the municipality of Winterthur in the canton of Zürich, Switzerland. History In 1947 an association for the establishment of a technical museum in Switzerland was launched, and objects were held by the industrial companies of the Winterthur–Zürich–Baden region. On 26 June 1969, a foundation in accordance with Art. 80 ff ZGB was founded under the name ''Technorama der Schweiz'', purposing ''science and technology for vivid spectacle''. In 1982 an exhibition was presented, but in a conservative way being a conventional technology museum, covered by verbal information masses, mainly in the form of an audiovisual superstructure. In June 1990 a new mission statement was adopted, created by the former director Remo Besio. Essentially, it was inspired and designed by the leading science centers of the UK and the US, including the '' Exploratorium'' in San Francisco. The theoretical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jersey City, New Jersey
Jersey City is the second-most populous city in the U.S. state of New Jersey, after Newark.The Counties and Most Populous Cities and Townships in 2010 in New Jersey: 2000 and 2010 , . Accessed November 7, 2011. It is the of Hudson County and the county's largest city. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liberty Science Center
Liberty Science Center is an interactive science museum and learning center located in Liberty State Park in Jersey City, New Jersey, United States. At its opening it was the largest such planetarium in the Western Hemisphere and the world's fourth largest. The center, which first opened in 1993 as New Jersey's first major state science museum, has science exhibits, numerous educational resources, and the original ''Hoberman sphere'', a silver, computer-driven engineering artwork designed by Chuck Hoberman. History Liberty Science Center completed a 22-month, $109 million expansion and renewal project on July 19, 2007.Kitta MacPherson. "Innovation & Inspiration", ''The Star-Ledger'', October 4, 2006. The expansion added to the facility, bringing it to nearly . In December 2017, the Science Center opened the Jennifer Chalsty Planetarium, a 400-seat facility with a dome in diameter and an diameter screen, named for the benefactor who contributed $5 million towards the co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tartu, Estonia
Tartu is the second largest city in Estonia after the Northern European country's political and financial capital, Tallinn. Tartu has a population of 91,407 (as of 2021). It is southeast of Tallinn and 245 kilometres (152 miles) northeast of Riga, Latvia. Tartu lies on the Emajõgi river, which connects the two largest lakes in Estonia, Lake Võrtsjärv and Lake Peipus. From the 13th century until the end of the 19th century, Tartu was known in most of the world by variants of its historical name Dorpat. Tartu, the largest urban centre of southern Estonia, is often considered the "intellectual capital city" of the country, especially as it is home to the nation's oldest and most renowned university, the University of Tartu (founded in 1632). Tartu also houses the Supreme Court of Estonia, the Ministry of Education and Research, the Estonian National Museum, and the oldest Estonian-language theatre, Vanemuine. It is also the birthplace of the Estonian Song Festivals. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Folding Chair
A folding chair is a type of folding furniture, a light, portable chair that folds flat or to a smaller size, and can be stored in a stack, in a row, or on a cart. It can be combined with a folding table. Uses Folding chairs are generally used for seating in areas where permanent seating is not possible or practical. This includes outdoor and indoor events such as funerals, college graduations, religious services, and sporting events and competitions. Folding chairs are also used in the home for any situation requiring extra seating. This includes parties, card games, and temporary seating at the dinner table. Some folding chairs are rocking chairs as well. History Folding chairs or stools were used as seating in the Mediterranean area in the 15th-13th century BC. The chairs were also used as grave goods in the richest graves. A folding chair of ebony and ivory with gold fittings was found in Tutankhamun's tomb in Egypt. Folding chairs were already used in the Nordic B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoberman Sphere Maintenance
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Hoberman is a surname. Notable people with the surname include: *Ben Hoberman (1922–2014), American radio executive *Brent Hoberman, founder of Lastminute.com * Chuck Hoberman, American designer and architect *David Hoberman (born 1952), American film producer * Haggai Hoberman, Israeli journalist and author *J. Hoberman, American film critic * John Hoberman, Professor of Germanic languages at the University of Texas at Austin * John Milton Hoberman, American author * Mary Ann Hoberman (born 1930), American writer *Nicky Hoberman (born 1967), South African artist * Perry Hoberman, American artist See also * Hoberman Arch *Hoberman sphere A Hoberman sphere is an isokinetic structure patented by Chuck Hoberman that resembles a geodesic dome, but is capable of folding down to a fraction of its normal size by the scissor-like action of its joints. Colorful plastic versions have becom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pantograph
A pantograph (, from their original use for copying writing) is a mechanical linkage connected in a manner based on parallelograms so that the movement of one pen, in tracing an image, produces identical movements in a second pen. If a line drawing is traced by the first point, an identical, enlarged, or miniaturized copy will be drawn by a pen fixed to the other. Using the same principle, different kinds of pantographs are used for other forms of duplication in areas such as sculpting, minting, engraving, and milling. Because of the shape of the original device, a pantograph also refers to a kind of structure that can compress or extend like an accordion, forming a characteristic rhomboidal pattern. This can be found in extension arms for wall-mounted mirrors, temporary fences, pantographic knives, scissor lifts, and other scissor mechanisms such as the pantograph used on electric locomotives and trams. History The ancient Greek engineer Hero of Alexandria described ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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