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History Of The Bicycle
Vehicles that have two wheels and require balancing by the rider date back to the early 19th century. The first means of transport making use of two wheels arranged consecutively, and thus the archetype of the bicycle, was the German ''draisine'' dating back to 1817. The term '' bicycle'' was coined in France in the 1860s, and the descriptive title " penny farthing", used to describe an " ordinary bicycle", is a 19th-century term. Earliest unverified bicycle There are several early, but unverified claims for the invention of the bicycle. A sketch from around 1500 AD is attributed to Gian Giacomo Caprotti, a pupil of Leonardo da Vinci, but it was described by Hans-Erhard Lessing in 1998 as a purposeful fraud, a description now generally accepted.Lessing, Hans-Erhard: "The evidence against Leonardo's bicycle", ''Cycle History'' 8, San Francisco 1998, pp. 49–56 However, the authenticity of the bicycle sketch is still vigorously maintained by followers of Prof. Augusto Marinoni, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1886 Swift Safety Bicycle Coventry Transport Museum
Events January–March * January 1 – Upper Burma is formally annexed to British Burma, following its conquest in the Third Anglo-Burmese War of November 1885. * January 5– 9 – Robert Louis Stevenson's novella ''Strange Case of Dr Jekyll and Mr Hyde'' is published in New York and London. * January 16 – A resolution is passed in the German Parliament to condemn the Prussian deportations, the politically motivated mass expulsion of ethnic Poles and Jews from Prussia, initiated by Otto von Bismarck. * January 18 – Modern field hockey is born with the formation of The Hockey Association in England. * January 29 – Karl Benz patents the first successful gasoline-driven automobile, the Benz Patent-Motorwagen (built in 1885). * February 6– 9 – Seattle riot of 1886: Anti-Chinese sentiments result in riots in Seattle, Washington. * February 8 – The West End Riots following a popular meeting in Trafalgar Square, London. * Fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velocipede
A velocipede () is a human-powered land vehicle with one or more wheels. The most common type of velocipede today is the bicycle. The term was probably first coined by Karl von Drais in French as ''vélocipède'' for the French translation of his advertising leaflet for his version of the ''Laufmaschine'', also now called a 'dandy horse', which he had developed in 1817. It is ultimately derived from the Latin ''velox'', ''veloc-'' 'swift' + ''pes'', ''ped-'' 'foot'.''Oxford Dictionary of English'', 'velocipede' The term 'velocipede' is today mainly used as a collective term for the different forerunners of the monowheel, the unicycle, the bicycle, the dicycle, the tricycle and the quadracycle developed between 1817 and 1880. It refers especially to the forerunner of the modern bicycle that was propelled, like a modern tricycle, by cranks, i.e. pedals, attached to the front axle before the invention of geared chains and belt and shaft drives powering the rear. History Amo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycle Two 1886
A bicycle, also called a pedal cycle, bike or cycle, is a human-powered or motor-powered assisted, pedal-driven, single-track vehicle, having two wheels attached to a frame, one behind the other. A is called a cyclist, or bicyclist. Bicycles were introduced in the 19th century in Europe. By the early 21st century, more than 1 billion were in existence. These numbers far exceed the number of cars, both in total and ranked by the number of individual models produced. They are the principal means of transportation in many regions. They also provide a popular form of recreation, and have been adapted for use as children's toys, general fitness, military and police applications, courier services, bicycle racing, and bicycle stunts. The basic shape and configuration of a typical upright or "safety bicycle", has changed little since the first chain-driven model was developed around 1885. However, many details have been improved, especially since the advent of modern m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Keats
John Keats (31 October 1795 – 23 February 1821) was an English poet of the second generation of Romantic poets, with Lord Byron and Percy Bysshe Shelley. His poems had been in publication for less than four years when he died of tuberculosis at the age of 25. They were indifferently received in his lifetime, but his fame grew rapidly after his death. By the end of the century, he was placed in the canon of English literature, strongly influencing many writers of the Pre-Raphaelite Brotherhood; the ''Encyclopædia Britannica'' of 1888 called one ode "one of the final masterpieces". Jorge Luis Borges named his first encounter with Keats an experience he felt all his life. Keats had a style "heavily loaded with sensualities", notably in the series of odes. Typically of the Romantics, he accentuated extreme emotion through natural imagery. Today his poems and letters remain among the most popular and analysed in English literature – in particular "Ode to a Nightingale", "Od ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serpentine Shape
A serpentine shape is any of certain curved shapes of an object or design, which are suggestive of the shape of a snake (the adjective "serpentine" is derived from the word ''serpent''). Serpentine shapes occur in architecture, in furniture, and in mathematics. In architecture and urban design The serpentine shape is observed in many architectural settings. It may provide strength, as in serpentine walls, it may allow the facade of a building to face in multiple directions, or it may be chosen for purely aesthetic reasons. *At the University of Virginia, serpentine walls (crinkle crankle walls) extend down the length of the main lawn at the University of Virginia and flank both sides of the rotunda. They are one of the many structures Thomas Jefferson created that combine aesthetics with utility. The sinusoidal path of the wall provides strength against toppling over, allowing the wall to be only a single brick thick. *At the Massachusetts Institute of Technology, the Baker ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Denis Johnson Of London
Denis Johnson ( – 25 December 1833) was an English coachmaker who worked on Long Acre, London, England. He was a pioneer bicycle-maker. Biography Johnson was married to Mary Newman in St Anne's Church, Soho in 1792 and they had two daughters. He worked out of 75 Long Acre for about 15 years from 1818. Johnson continued as a coachmaker until he died on Christmas Day 1833. The family business continued to trade here until 1867. Bicycle maker Johnson created an improved version of the German Karl Drais, Karl Drais's Draisine, the archetypal bicycle. Johnson's "pedestrian curricle" was patented in London in December 1818, becoming Britain's first bicycle. It featured an elegantly curved wooden frame, allowing the use of larger wooden wheels. Several parts were made of metal, which allowed the vehicle to be lighter than the continental version. Although Johnson referred to his machine as a ‘pedestrian curricle’, it was formally referred to as a ‘velocipede’, and popularl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wainwright (occupation)
A wainwright or cartwright is a trades person skilled in the making and repairing of wagons and carts. The word ''wainwright'' is the combination of the archaic words "wain" (a large wagon for farm use) and "wright" (a worker or maker), originating from the Old English ''wægnwyrhta''. A master wainwright employs several craftsmen, including wheelwrights, blacksmiths and painters.Bobbie Kalman, Deanna Brady, ''The Woodworkers'' (2001), p. 26. A carriagemaker specializes in making carriages. See also * Carriagemaker * Carter (name) * Coachbuilder A coachbuilder or body-maker is someone who manufactures bodies for passenger-carrying vehicles.Construction has always been a skilled trade requiring a relatively lightweight product with sufficient strength. The manufacture of necessarily ... References Obsolete occupations History of road transport {{job-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
YouTube
YouTube is a global online video platform, online video sharing and social media, social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by Google, and is the List of most visited websites, second most visited website, after Google Search. YouTube has more than 2.5 billion monthly users who collectively watch more than one billion hours of videos each day. , videos were being uploaded at a rate of more than 500 hours of content per minute. In October 2006, YouTube was bought by Google for $1.65 billion. Google's ownership of YouTube expanded the site's business model, expanding from generating revenue from advertisements alone, to offering paid content such as movies and exclusive content produced by YouTube. It also offers YouTube Premium, a paid subscription option for watching content without ads. YouTube also approved creators to participate in Google's Google AdSens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caster Angle
250px, θ is the caster angle, the red line is the pivot line, and the grey area is the tire. 250px, Front suspension of a race car, the caster angle is formed by the line between upper and lower ball joint. The caster angle or castor angle is the angular displacement of the steering axis from the vertical axis of a steered wheel in a car, motorcycle, bicycle, other vehicle or a vessel, as seen from the side of the vehicle. The steering axis in a car with dual ball joint suspension is an imaginary line that runs through the center of the upper ball joint to the center of the lower ball joint, or through the center of the kingpin for vehicles having a kingpin. Caster causes a wheel to align with the direction of travel, and can be accomplished either by caster displacement or caster angle. Caster displacement moves the steering axis ahead of the axis of wheel rotation, as with the front wheels of a shopping cart. Caster angle moves the steering axis from vertical. In automo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mannheim
Mannheim (; Palatine German: or ), officially the University City of Mannheim (german: Universitätsstadt Mannheim), is the second-largest city in the German state of Baden-Württemberg after the state capital of Stuttgart, and Germany's 21st-largest city, with a 2020 population of 309,119 inhabitants. The city is the cultural and economic centre of the Rhine-Neckar Metropolitan Region, Germany's seventh-largest metropolitan region with nearly 2.4 million inhabitants and over 900,000 employees. Mannheim is located at the confluence of the Rhine and the Neckar in the Kurpfalz (Electoral Palatinate) region of northwestern Baden-Württemberg. The city lies in the Upper Rhine Plain, Germany's warmest region. Together with Hamburg, Mannheim is the only city bordering two other federal states. It forms a continuous conurbation of around 480,000 inhabitants with Ludwigshafen am Rhein in the neighbouring state of Rhineland-Palatinate, on the other side of the Rhine. Some northe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
