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Jean Maritz
Jean Maritz (1680–1743), also Johan Maritz, was a Swiss inventor, born in Burgdorf, Canton of Bern, who moved to France, becoming "Commissaire des Fontes" at Strasbourg (Commissioner of the King's Foundry),''A Dictionary of Military History and the Art of War'' by André Corvisier p.33/ref> and invented the vertical drilling machine, as well as the horizontal drilling machine for cannons in the 18th century. His inventions revolutionized cannon-making, and became a key component of the de Vallière, de Vallière system, and contributed to the development of the later Gribeauval system. Jean Maritz first invented a vertical drilling machine for cannons while in France in 1713. The vertical drilling method however, in which a cannon was slowly lowered over a turning drill, was very delicate, very time consuming and rather imprecise. He further developed a method for the horizontal drilling of cannons around 1734. These methods involved the drilling of a bore from a solid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Old Swiss Confederacy
The Old Swiss Confederacy or Swiss Confederacy ( Modern German: ; historically , after the Reformation also , "Confederation of the Swiss") was a loose confederation of independent small states (, German or In the charters of the 14th century described as "communities" (, ), the German term ''Orte'' becomes common in the early 15th century, used alongside "estate" after the Reformation. The French term is used in Fribourg in 1475, and after 1490 is increasingly used in French and Italian documents. It only enters occasional German usage after 1648, and only gains official status as synonym of with the Act of Mediation of 1803. ), initially within the Holy Roman Empire. It is the precursor of the modern state of Switzerland. It formed during the 14th century, from a nucleus in what is now Central Switzerland, expanding to include the cities of Zürich and Bern by the middle of the century. This formed a rare union of rural and urban communes, all of which enjoyed imp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cannons
A cannon is a large-caliber gun classified as a type of artillery, which usually launches a projectile using explosive chemical propellant. Gunpowder ("black powder") was the primary propellant before the invention of smokeless powder during the late 19th century. Cannons vary in gauge, effective range, mobility, rate of fire, angle of fire and firepower; different forms of cannon combine and balance these attributes in varying degrees, depending on their intended use on the battlefield. A cannon is a type of heavy artillery weapon. The word ''cannon'' is derived from several languages, in which the original definition can usually be translated as ''tube'', ''cane'', or ''reed''. In the modern era, the term ''cannon'' has fallen into decline, replaced by ''guns'' or ''artillery'', if not a more specific term such as howitzer or mortar, except for high-caliber automatic weapons firing bigger rounds than machine guns, called autocannons. The earliest known depiction of cann ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1743 Deaths
Events January–March * January 1 – The Verendrye brothers, probably Louis-Joseph and François de La Vérendrye, become the first white people to see the Rocky Mountains from the eastern side (the Spanish conquistadors had seen the Rockies from the west side). * January 8 – King Augustus III of Poland, acting in his capacity as Elector of Saxony, signs an agreement with Austria, pledging help in war in return for part of Silesia to be conveyed to Saxony. * January 12 ** The Verendryes, and two members of the Mandan Indian tribe, reach the foot of the mountains, near the site of what is now Helena, Montana. ** An earthquake strikes the Philippines * January 16 –Cardinal André-Hercule de Fleury turns his effects over to King Louis XV of France, 13 days before his death on January 29. * January 23 –With mediation by France, Sweden and Russia begin peace negotiations at Åbo to end the Russo-Swedish War. By August 17, Sweden ced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1680 Births
Year 168 ( CLXVIII) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Apronianus and Paullus (or, less frequently, year 921 ''Ab urbe condita''). The denomination 168 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Emperor Marcus Aurelius and his adopted brother Lucius Verus leave Rome, and establish their headquarters at Aquileia. * The Roman army crosses the Alps into Pannonia, and subdues the Marcomanni at Carnuntum, north of the Danube. Asia * Emperor Ling of Han succeeds Emperor Huan of Han as the emperor of the Chinese Han Dynasty; the first year of the ''Jianning'' era. Births * Cao Ren, Chinese general (d. 223) * Gu Yong, Chinese chancellor (d. 243) * Li Tong, Chinese general (d. 209) Deaths * Anicetu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Wilkinson (industrialist)
John "Iron-Mad" Wilkinson (1728 – 14 July 1808) was an English industrialist who pioneered the manufacture of cast iron and the use of cast-iron goods during the Industrial Revolution. He was the inventor of a precision boring machine that could bore cast iron cylinders, such as cannon barrels and piston cylinders used in the steam engines of James Watt. His boring machine has been called the first machine tool. He also developed a blowing device for blast furnaces that allowed higher temperatures, increasing their efficiency, and helped sponsor the first iron bridge in Coalbrookdale. He is notable for his method of cannon boring, his techniques at casting iron and his work with the government of France to establish a cannon foundry. Biography Early life John Wilkinson was born in Little Clifton, Bridgefoot, Cumberland (now part of Cumbria), the eldest son of Isaac Wilkinson and Mary Johnson. Isaac was then the potfounder at the blast furnace there, one of the first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gribeauval
Lieutenant General Jean-Baptiste Vaquette de Gribeauval (15 September 1715 – 9 May 1789) was a French artillery officer and engineer who revolutionised the French cannon, creating a new production system that allowed for lighter, more uniform guns without sacrificing range. His Gribeauval system superseded the de Vallière system. These guns proved essential to French military victories during the Napoleonic Wars. Gribeauval is credited as the earliest known advocate for the interchangeability of gun parts. He is thus one of the principal influences on the later development (over many decades by many people) of interchangeable manufacture. Early life Jean-Baptiste was born in Amiens, the son of a magistrate. He entered the French royal artillery in 1732 as a volunteer, and became an officer in 1735. For nearly twenty years regimental duty and scientific work occupied him, and in 1752 he became captain of a company of miners.Summerfield (2011) ''SOJ-2'', p. 20 In 1755, he was e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lathe
A lathe () is a machine tool that rotates a workpiece about an axis of rotation to perform various operations such as cutting, sanding, knurling, drilling, deformation, facing, and turning, with tools that are applied to the workpiece to create an object with symmetry about that axis. Lathes are used in woodturning, metalworking, metal spinning, thermal spraying, parts reclamation, and glass-working. Lathes can be used to shape pottery, the best-known design being the Potter's wheel. Most suitably equipped metalworking lathes can also be used to produce most solids of revolution, plane surfaces and screw threads or helices. Ornamental lathes can produce three-dimensional solids of incredible complexity. The workpiece is usually held in place by either one or two ''centers'', at least one of which can typically be moved horizontally to accommodate varying workpiece lengths. Other work-holding methods include clamping the work about the axis of rotation using a chuck or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Maritz Cannon De 24 Strasbourg 1745
Jean may refer to: People * Jean (female given name) * Jean (male given name) * Jean (surname) Fictional characters * Jean Grey, a Marvel Comics character * Jean Valjean, fictional character in novel ''Les Misérables'' and its adaptations * Jean Pierre Polnareff, a fictional character from ''JoJo's Bizarre Adventure'' Places * Jean, Nevada, USA; a town * Jean, Oregon, USA Entertainment * Jean (dog), a female collie in silent films * "Jean" (song) (1969), by Rod McKuen, also recorded by Oliver * ''Jean Seberg'' (musical), a 1983 musical by Marvin Hamlisch Other uses * JEAN (programming language) * USS ''Jean'' (ID-1308), American cargo ship c. 1918 * Sternwheeler Jean, a 1938 paddleboat of the Willamette River See also *Jehan * * Gene (other) * Jeanne (other) * Jehanne (other) * Jeans (other) * John (other) John is a common English name and surname: * John (given name) * John (surname) John may also refer to: New Testa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gauge (bore Diameter)
The gauge (or commonly bore in British English) of a firearm is a unit of measurement used to express the inner diameter (bore diameter) of the barrel. Gauge is determined from the weight of a solid sphere of lead that will fit the bore of the firearm and is expressed as the multiplicative inverse of the sphere's weight as a fraction of a pound, e.g., a one-twelfth pound lead ball fits a 12-gauge bore. Thus there are twelve 12-gauge balls per pound, etc. The term is related to the measurement of cannon, which were also measured by the weight of their iron round shot; an 8-pounder would fire an 8 lb (3.6 kg) ball. Gauge is commonly used today in reference to shotguns, though historically it was also used in large double rifles, which were made in sizes up to 2 bore during their heyday in the 1880s, being originally loaded with black powder cartridges. These very large rifles, called " elephant guns", were intended for use primarily in Africa and Asia for hunting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burgdorf, Switzerland
Burgdorf (french: Berthoud; High Alemannic: ''Bùùrdlef'') is the largest city in the Emmental in the canton of Bern in Switzerland. It was the capital of the district of the same name until 2010, when it became part of the new Emmental district. History Scattered archeological finds indicate that the area around Burgdorf was inhabited during the Neolithic era, the Late Bronze Age and the Hallstatt. During the High Middle Ages the land that would become Burgdorf was owned by the Kingdom of Burgundy and then after 1080 by the Dukes of Zähringen. Either the kings or the dukes built a castle on the left bank of the Emme river. Burgdorf is first mentioned in 1236 as ''in oppido Burchtorff'', while Burgdorf Castle is mentioned in 1080 as ''castellum Bertoldi ducis''. The Zähringen dukes built a city (upper-west city section) around the castle in the last quarter of the 12th century. After the extinction of Zähringen line, Burgdorf passed to the Counts of Kyburg. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
