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Les Hanois Lighthouse
Les Hanois Lighthouse was constructed between 1860 and 1862 to a design by James Walker, and was first lit on 8 December 1862. It is sited on the rock known as Le Biseau, or Le Bisé, part of the reef Les Hanois one mile north west of Pleinmont where the Trinity House cottages were built. It was erected in response to an increasing number of shipwrecks on the treacherous rocks off the western coast of Guernsey. Planning Shipwrecks shortly before the construction included the wreck of () in 1807 A further wreck in 1816 of the ''Marie Elizabeth'', a merchant ship from Copenhagen, at Rocquaine triggered letters and discussions about undertaking a ''nobel project'', Trinity House was contacted and in January 1817 about a possible lighthouse on the Pleinmont cliff top, they wrote back saying a lighthouse was not necessary as the lights on Les Casquets and at Portland were sufficient and a new lighthouse would be confusing and do more harm than good. The Trinity House Brethren a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Les Hanois
Les Hanois reef, a group of rocks to the south-west of Guernsey also known as Hanoveaux, are the westernmost point of the Channel Islands. The reef has claimed many shipwrecks over the centuries, such as () in 1807. See List of shipwrecks in the Channel Islands. It is the location of the Les Hanois Lighthouse operated by Trinity House "Three In One" , formation = , founding_location = Deptford, London, England , status = Royal Charter corporation and registered charity , purpose = Maintenance of lighthouses, buoys and beacons , he ... which was built in 1862 from Cornish granite using a novel dovetail system to lock each stone with two others. It was built in the hope of reducing the number of ships being lost on the reef on the west coast of Guernsey; it undoubtedly saved a number of ships. However, the wrecks continued, the last disaster being the MV ''Prosperity'' in 1974, a freighter lost with all hands on La Conchée reef. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Timmins Chance
Sir James Timmins Chance, 1st Baronet (22 March 1814 – 6 January 1902''Oxford Dictionary of National Biography: Chance, James Timmins, first baronet'', by Charles Welch), was an English industrialist, philanthropist, director of the London and North Western Railway, and an expert in lighthouse optics. He served in public office, including as a Justice of the Peace for Staffordshire and Worcestershire in 1851, Deputy Lieutenant of Staffordshire in 1856 and for Worcestershire in 1859 (in which time he set up the first Volunteer Rifle Corps in the country), and High Sheriff of Staffordshire in 1868. He was a nephew of Lucas Chance, the founder of the family firm, glassmakers, Chance Brothers, of which James was, like his father, also William, a partner and eventually head, until his retirement in 1889, when the company was formed into a public company and the name changed to ''Chance Brothers & Co. Ltd''. He was educated at London University, then Trinity College, Cambridge. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Lighthouses In The Channel Islands ...
This is a list of lighthouses in the Channel Islands. The archipelago lies to the west of the Cotentin Peninsula in the English Channel. There are lighthouses on all of the four main islands: Alderney, Guernsey, Jersey and Sark. Lighthouses See also * Lists of lighthouses and lightvessels References External links * {{DEFAULTSORT:Channel Islands Lists of lighthouses by dependent territory * lighthouses A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lenses and to serve as a beacon for navigational aid, for maritime pilots at sea or on inland waterways. Lighthouses mark ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compressed Air
Compressed air is air kept under a pressure that is greater than atmospheric pressure. Compressed air is an important medium for transfer of energy in industrial processes, and is used for power tools such as air hammers, drills, wrenches, and others, as well as to atomize paint, to operate air cylinders for automation, and can also be used to propel vehicles. Brakes applied by compressed air made large railway trains safer and more efficient to operate. Compressed air brakes are also found on large highway vehicles. Compressed air is used as a breathing gas by underwater divers. It may be carried by the diver in a high pressure diving cylinder, or supplied from the surface at lower pressure through an air line or diver's umbilical. Similar arrangements are used in breathing apparatus used by firefighters, mine rescue workers and industrial workers in hazardous atmospheres. In Europe, 10 percent of all industrial electricity consumption is to produce compressed air—amountin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fourth Order Fresnel Lens
A Fresnel lens ( ; ; or ) is a type of composite compact lens developed by the French physicist Augustin-Jean Fresnel (1788–1827) for use in lighthouses. It has been called "the invention that saved a million ships." The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. The simpler dioptric (purely refractive) form of the lens was first proposed by Count Buffon and independently reinvented by Fresnel. The ''catadioptric'' form of the lens, entirely invented by Fresnel, has outer elements that use total internal reflection as well as refraction; it can capture more oblique light from a light source and add it to the beam of a lighthouse, making the light visible from greater distances. Description The Fresnel lens reduce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilkington Brothers
Pilkington is a Japanese-owned glass-manufacturing company which is based in Lathom, Lancashire, United Kingdom. In the UK it includes several legal entities and is a subsidiary of Japanese company Nippon Sheet Glass, NSG Group. Prior to its acquisition by NSG in 2006, it was an independent company listed on the London Stock Exchange and for a time was a constituent of the FTSE 100 Index. History The company was founded in 1826 as a partnership between members of the Pilkington and Greenall families, based in St Helens, Lancashire (now Merseyside). The venture used the trading name of ''St Helens Crown Glass Company''. On the departure from the partnership of the last Greenall in 1845, the firm became known as ''Pilkington Brothers''. In 1894, the business was incorporated under the Companies Act 1862 as ''Pilkington Brothers Limited''. Pilkington was floated as a public company on the London Stock Exchange in 1970. It was for many years the biggest employer in the northwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jib (crane)
A jib or jib arm is the horizontal or near-horizontal beam used in many types of crane to support the load clear of the main support. An archaic spelling is gib. Usually jib arms are attached to a vertical mast or tower or sometimes to an inclined boom. In other jib-less designs such as derricks, the load is hung directly from a boom which is often anomalously called a jib. A camera jib or jib arm in cinematography Cinematography (from ancient Greek κίνημα, ''kìnema'' "movement" and γράφειν, ''gràphein'' "to write") is the art of motion picture (and more recently, electronic video camera) photography. Cinematographers use a lens to focu ... is a small crane that holds nothing but the camera.Scott Schaefermeyer ''Digital Video Basics'' 1418865133 2012 p109 "A jib arm is basically a small crane that holds nothing but the camera. Large jib arms require somebody to move and control the jib while the camera operator controls the camera. " References {{Au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitrocellulose
Nitrocellulose (also known as cellulose nitrate, flash paper, flash cotton, guncotton, pyroxylin and flash string, depending on form) is a highly flammable compound formed by nitrating cellulose through exposure to a mixture of nitric acid and sulfuric acid. One of its first major uses was as guncotton, a replacement for gunpowder as propellant in firearms. It was also used to replace gunpowder as a low-order explosive in mining and other applications. In the form of collodion it was also a critical component in an early photographic emulsion, the use of which revolutionized photography in the 1860s. Production The process uses a mixture of nitric acid and sulfuric acid to convert cellulose into nitrocellulose. The quality of the cellulose is important. Hemicellulose, lignin, pentosans, and mineral salts give inferior nitrocelluloses. In precise chemical terms, nitrocellulose is not a nitro compound, but a nitrate ester. The glucose repeat unit (anhydroglucose) within the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argand Lamp
The Argand lamp is a type of oil lamp invented in 1780 by Aimé Argand. Its output is 6 to 10 candelas, brighter than that of earlier lamps. Its more complete combustion of the candle wick and oil than in other lamps required much less frequent trimming of the wick. In France, the lamp is called "Quinquet", after Antoine-Arnoult Quinquet, a pharmacist in Paris, who used the idea originated by Argand and popularized it in France. Quinquet sometimes is credited with the addition of the glass chimney to the lamp. Design The Argand lamp had a sleeve-shaped wick mounted so that air can pass both through the center of the wick and also around the outside of the wick before being drawn into a cylindrical chimney which steadies the flame and improves the flow of air. Early models used ground glass which was sometimes tinted around the wick. An Argand lamp used whale oil, seal oil, colza, olive oil or other vegetable oil as fuel which was supplied by a gravity feed from a reservoir mou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruby Glass
Cranberry glass or Gold Ruby glass is a red glass made by adding gold salts or colloidal gold to molten glass. Tin, in the form of stannous chloride, is sometimes added in tiny amounts as a reducing agent. The glass is used primarily in expensive decorations. Production Cranberry glass is made in craft production rather than in large quantities, due to the high cost of the gold. The gold chloride is made by dissolving gold in a solution of nitric acid and hydrochloric acid ( aqua regia). The glass is typically hand blown or molded. The finished, hardened glass is a type of colloid, a solid phase (gold) dispersed inside another solid phase (glass). History The origins of cranberry glass making are unknown, but many historians believe a form of this glass was first made in the late Roman Empire. This is evidenced by the British Museum's collection Lycurgus Cup, a 4th-century Roman glass cage cup made of a dichroic glass, which shows a different colour depending on whet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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