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Mechanical Pick
A jackhammer (pneumatic drill or demolition hammer in British English) is a pneumatic or electro-mechanical tool that combines a hammer directly with a chisel. It was invented by William Mcreavy, who then sold the patent to Charles Brady King. Hand-held jackhammers are generally powered by compressed air, but some are also powered by electric motors. Larger jackhammers, such as rig-mounted hammers used on construction machinery, are usually hydraulically powered. These tools are typically used to break up rock, pavement, and concrete. A jackhammer operates by driving an ''internal'' hammer up and down. The hammer is first driven down to strike the chisel and then back up to return the hammer to the original position to repeat the cycle. The effectiveness of the jackhammer is dependent on how much force is applied to the tool. It is generally used like a hammer to break the hard surface or rock in construction works and it is not considered under earth moving equipment, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pneumatic Drill , run by compressed air
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A pneumatic drill may refer to a: *Jackhammer, a tool used to break up rock and pavement *Drill A drill is a tool used for making round holes or driving fasteners. It is fitted with a bit, either a drill or driverchuck. Hand-operated types are dramatically decreasing in popularity and cordless battery-powered ones proliferating due to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patent Caveat
A patent caveat, often shortened to caveat, was a legal document filed with the United States Patent Office. History Caveats were instituted by the U.S. Patent Act of 1836, but were discontinued in 1909, with the U.S. Congress abolishing the system formally in 1910. A caveat was similar to a patent application with a description of an invention and drawings, but without examination for patentable subject matter and without a requirement for patent claims. A patent caveat was an official notice of intention to file a patent application at a later date. A caveat expired after one year, but could be renewed by paying an annual fee of $10. Caveats were similar to provisional applications used today in the United States Patent and Trademark Office (USPTO) which also expire after one year. However, provisional applications today are non-renewable under any circumstances. According to the ''Guide to the Practice of the Patent Office'' 1853,Evenson, A.E. ''The Telephone Patent Consp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North American English
North American English (NAmE, NAE) is the most generalized variety of the English language as spoken in the United States and Canada. Because of their related histories and cultures, plus the similarities between the pronunciations (accents), vocabulary, and grammar of American English and Canadian English, the two spoken varieties are often grouped together under a single category. Canadians are generally tolerant of both British and American spellings, with British spellings of certain words (e.g., ''colour'') being favored in more formal settings and in Canadian print media; for some other words the American spelling prevails over the British (e.g., ''tire'' rather than ''tyre''). Dialects of American English spoken by United Empire Loyalists who fled the American Revolution (1775–1783) have had a large influence on Canadian English from its early roots. Some terms in North American English are used almost exclusively in Canada and the United States (for example, the term ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ingersoll Rand
Ingersoll Rand is an American multinational company that provides flow creation and industrial products. The company was formed in February 2020 through the spinoff of the industrial segment of Ingersoll-Randplc (now known as Trane Technologies) and its merger with Gardner Denver. Its products are sold under more than 40 brands across all major global markets. Based in Davidson, North Carolina, Ingersoll Rand operates in two segments: Industrial Technologies and Services and Precision and Science Technologies. History History of Ingersoll Rand Simon Ingersoll founded Ingersoll Rock Drill Company in 1871 in New York, and in 1888, it combined with Sergeant Drill to form Ingersoll Sergeant Drill Company. The Ingersoll Sergeant Drill Company introduced the world's first direct-connected, electronic motor-driven compressor. Also in 1871, brothers Addison Rand and Jasper Rand, Jr. established Rand Drill Company with its main manufacturing plant in Tarrytown, New York. Rand drills ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlas Copco
Atlas Copco (Copco from Compagnie Pneumatique Commerciale) is a Swedish multinational industrial company that was founded in 1873. It manufactures industrial tools and equipment. The Atlas Copco Group is a global industrial group of companies headquartered in Nacka, Sweden. In 2019, global revenues totaled SEK 104 billion, and by the end of that year the company employed about 38,774 people. The firm's shares are listed on the Nasdaq Stockholm exchange and both 'A' and 'B' classes form part of the benchmark OMXS30 index. Atlas Copco companies develop, manufacture, service, and rent industrial tools, air compressors (of which it is the world's leading producer), construction and assembly systems. The Group operates in four areas: Compressor Technology, Vacuum Technology, Power Technology and Industrial Technology. History Early development AB Atlas, as it was previously named, was founded by Edvard Fränckel, who was a Swedish industrialist, politician and senior official ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gotthard Tunnel
, it, Galleria del San Gottardo , other_name = , line = Gotthard Line , location = Traversing the Saint-Gotthard Massif in the middle of the Swiss Alps , coordinates = , os_grid_ref = , status = , system = Swiss Federal Railways (SBB CFF FFS) , start = Göschenen, canton of Uri (north, ) , end = Airolo, canton of Ticino (south, ) , stations = , startwork = , opened = , closed = , rebuilt = , reopen = , owner = SBB CFF FFS , operator = SBB Infrastructure , traffic = railway , character = passenger, freight , engineer = Louis Favre , construction = , length = , linelength = , tracklength = , notrack = Double , gauge = (standard gauge) , el = 15 kV 16.7 Hz since , speed = , hielevation = (inside the tunnel) , lowelevation = (north portal) , height ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germain Sommeiller
Germain Sommeiller (February 15, 1815 – July 11, 1871) was a civil engineering, civil engineer from Savoy. He directed the construction of the Fréjus Rail Tunnel between France and Italy, also known as the Mont Cenis Tunnel. This was the first of a series of major tunnels built in the late 19th century to connect northern and southern Europe through the Alps. Sommeiller pioneered the use of Jackhammer, pneumatic drilling and dynamite to achieve record-breaking excavation speeds. This 12.8-km tunnel was completed on December 26, 1870, 11 years ahead of schedule. It remained the longest tunnel in the world until the opening of the Gotthard Rail Tunnel in 1882. Life Germain Sommeiller was born in Saint-Jeoire (now part of Haute-Savoie, France) on February 15, 1815. He graduated in civil engineering at the University of Turin in 1841. He became a Royal Civil Engineer in the Public Transport Department of Savoy in 1845. From 1846 to 1850 he worked for the Société anonyme Joh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Savoy
Savoy (; frp, Savouè ; french: Savoie ) is a cultural-historical region in the Western Alps. Situated on the cultural boundary between Occitania and Piedmont, the area extends from Lake Geneva in the north to the Dauphiné in the south. Savoy emerged as the feudal County of Savoy ruled by the House of Savoy during the 11th to 14th centuries. The original territory, also known as "ducal Savoy" or "Savoy proper", is largely co-terminous with the modern French Savoie and Haute-Savoie ''départements'', but the historical expansion of Savoyard territories, as the Duchy of Savoy (1416–1860) included parts of what is now western Italy and southwestern Switzerland. The current border between France and Italy is due to the Plombières Agreement of 1858, which in preparation for the unification of Italy ceded western Savoy to France, while the eastern territories in Piedmont and Liguria were retained by the House of Savoy, which was to become the ruling dynasty of Italy. Geogr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
François Cavé
François () is a French masculine given name and surname, equivalent to the English name Francis. People with the given name * Francis I of France, King of France (), known as "the Father and Restorer of Letters" * Francis II of France, King of France and King consort of Scots (), known as the husband of Mary Stuart, Queen of Scots * François Amoudruz (1926–2020), French resistance fighter * François-Marie Arouet (better known as Voltaire; 1694–1778), French Enlightenment writer, historian, and philosopher *François Aubry (other), several people *François Baby (other), several people * François Beauchemin (born 1980), Canadian ice hockey player for the Anaheim Duck *François Blanc (1806–1877), French entrepreneur and operator of casinos *François Boucher (other), several people *François Caron (other), several people * François Cevert (1944–1973), French racing driver * François Chau (born 1959), Cambodian American actor * Fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fréjus Rail Tunnel
The Fréjus Rail Tunnel (also called Mont Cenis Tunnel) is a rail tunnel of length in the European Alps, carrying the Turin–Modane railway through Mont Cenis to an end-on connection with the Culoz–Modane railway and linking Bardonecchia in Italy to Modane in France. Its mean altitude is and it passes beneath the '' Pointe du Fréjus'' () and the '' Col du Fréjus'' (). Headed by the Italian civil engineer Germain Sommeiller, construction of the tunnel commenced during August 1857, at a time when both ends of the future tunnel were in the Kingdom of Piemonte-Sardinia. From the onset, the tunnel was an ambitious engineering challenge, its gallery being twice the length of any tunnel previously constructed. Some figures believed that it would take as many as 40 years to complete; the total construction time was 13 years, the work having been greatly accelerated by the introduction of new technologies such as pneumatic drilling machines and dynamite. On 17 September 1871, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Albert Of Sardinia
Charles Albert (; 2 October 1798 – 28 July 1849) was the King of Sardinia from 27 April 1831 until 23 March 1849. His name is bound up with the first Italian constitution, the Albertine Statute, and with the First Italian War of Independence (1848–1849). During the Napoleonic period, he resided in France, where he received a liberal education. As Prince of Carignano in 1821, he granted and then withdrew his support for a rebellion which sought to force Victor Emmanuel I to institute a constitutional monarchy. He became a conservative and participated in the legitimist expedition against the Spanish liberals in 1823. He became king of Sardinia in 1831 on the death of his distant cousin Charles Felix, who had no heir. As king, after an initial conservative period during which he supported various European legitimist movements, he adopted the idea of a federal Italy, led by the Pope and freed from the House of Habsburg in 1848. In the same year he granted the Albertine Sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
