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Hurst Point Lighthouse
Hurst Point Lighthouse is located at Hurst Point in the English county of Hampshire, and guides vessels through the western approaches to the Solent. History The old lights The original lighthouse was the Hurst Tower, sited to the south west of the old Hurst Castle and lit for the first time on 29 September 1786.Lighthouses , hurstcastle.co.uk, retrieved 18 April 2012 was the architect and supervised and directed its construction, which was undertaken at the same time as the erection of two other lights nearby: one on [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hurst Spit
Hurst Spit is a shingle bank near the village of Keyhaven, at the western end of the Solent, on the south coast of England. The spit shelters an area of saltmarsh and mudflats known as Keyhaven and Pennington marshes. At the end of the spit is Hurst Castle, an artillery fortress originally built on the orders of King Henry VIII, and much enlarged in the 19th century. Hurst Point Lighthouse was built on the end of Hurst Spit in the 1860s. Geography Hurst Spit is a hook-shaped shingle spit which extends for from the Hampshire shore into the Solent towards the Isle of Wight. The spit forms a barrier which shelters a Site of Special Scientific Interest known as Hurst Castle And Lymington River Estuary. To reach the end of the spit one can either catch the seasonal ferry from Keyhaven, or follow the footpath (part of the Solent Way) along the top of the spit. The sea route past Hurst Spit can be hazardous to boats because the constriction to the tidal flow caused by the spit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Nicholas Douglass
Sir James Nicholas Douglass, (16 October 1826 – 19 June 1898) was an English civil engineer, a prolific lighthouse builder and designer, most famous for the design and construction of the fourth Eddystone Lighthouse, for which he was knighted. Biography James Nicholas Douglass was born in Bow, London, in 1826, the eldest son of Nicholas Douglass, also a civil engineer. After serving an apprenticeship with the Hunter and English company, he joined the engineering department of Trinity House, the United Kingdom's lighthouse authority. Along with his brother William, James worked as an assistant to his father during the construction of James Walker's Bishop Rock Lighthouse in the Scilly Isles, earning the nickname 'Cap'n Jim' during the process.Palmer, M. ''Eddystone: the finger of light'', Seafarer, 2005, , p.103 After a brief period working for the Newcastle carriage builders R J & R Laycock, he returned in 1854 to assist in the lighthouse's final completion and to marry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcium Carbide
Calcium carbide, also known as calcium acetylide, is a chemical compound with the chemical formula of Ca C2. Its main use industrially is in the production of acetylene and calcium cyanamide. The pure material is colorless, while pieces of technical-grade calcium carbide are grey or brown and consist of about 80–85% of CaC2 (the rest is CaO (calcium oxide), Ca3P2 (calcium phosphide), CaS (calcium sulfide), Ca3N2 (calcium nitride), SiC (silicon carbide), etc.). In the presence of trace moisture, technical-grade calcium carbide emits an unpleasant odor reminiscent of garlic. Applications of calcium carbide include manufacture of acetylene gas, generation of acetylene in carbide lamps, manufacture of chemicals for fertilizer, and steelmaking. Production Calcium carbide is produced industrially in an electric arc furnace from a mixture of lime and coke at approximately . This is an endothermic reaction requiring per mole and high temperatures to drive off the carbon monoxide. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sun Valve
A sun valve (''Swedish: solventil'', "solar valve") is a flow control valve that automatically shuts off gas flow during daylight. It earned its inventor Gustaf Dalén the 1912 Nobel Prize in Physics. Subsequently other variants of sun valve were developed for various different uses. Dalén's valve The valve was the key component of the Dalén light used in lighthouses from the 1900s through the 1960s, by which time electric lighting was dominant. Prominent engineers, such as Thomas Edison, doubted that the device could work. The German patent office required a demonstration before approving the patent application. Design The valve is controlled by four metal rods enclosed in a glass tube. The central rod that is blackened is surrounded by the three polished rods. As sunlight falls onto all of the rods, the absorbed heat of the sun expands the dark rod, switching a valve to cut the gas supply. After sunset, the central rod cools down, contracting to become the same length as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acetylene
Acetylene (systematic name: ethyne) is the chemical compound with the formula and structure . It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block. It is unstable in its pure form and thus is usually handled as a solution. Pure acetylene is odorless, but commercial grades usually have a marked odor due to impurities such as divinyl sulfide and phosphine.Compressed Gas Association (1995Material Safety and Data Sheet – Acetylene As an alkyne, acetylene is unsaturated because its two carbon atoms are bonded together in a triple bond. The carbon–carbon triple bond places all four atoms in the same straight line, with CCH bond angles of 180°. Discovery Acetylene was discovered in 1836 by Edmund Davy, who identified it as a "new carburet of hydrogen". It was an accidental discovery while attempting to isolate potassium metal. By heating potassium carbonate with carbon at very high temperatures, he produced a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mantle Lamp
A Coleman white gas lantern mantle glowing at full brightness An incandescent gas mantle, gas mantle or Welsbach mantle is a device for generating incandescent bright white light when heated by a flame. The name refers to its original heat source in gas lights which illuminated the streets of Europe and North America in the late 19th century. ''Mantle'' refers to the way it hangs like a cloak above the flame. Gas mantles were also used in portable camping lanterns, pressure lanterns and some oil lamps. Gas mantles are usually sold as fabric items, which, because of impregnation with metal nitrates, burns away to leave a rigid but fragile mesh of metal oxides when heated during initial use; these metal oxides produce light from the heat of the flame whenever used. Thorium dioxide was commonly a major component; being radioactive, it has led to concerns about the safety of those involved in manufacturing mantles. Normal use, however, poses minimal health risk. Mechanism ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hurst Point (19930538761)
Hurst may refer to: Places England * Hurst, Berkshire, a village * Hurst, North Yorkshire, a hamlet * Hurst, a settlement within the village of Martock, Somerset * Hurst, West Sussex, a hamlet * Hurst Spit, a shingle spit in Hampshire ** Hurst Castle * Hurst Hill, Lancashire * Hurst Reservoir, a disused reservoir near Glossop, north Derbyshire United States * Hurst, Illinois, a city * Hurst, Missouri, a ghost town * Hurst, Texas, a city * Hurst, West Virginia, an unincorporated community Antarctica * Hurst Peak, Ellsworth Land * Hurst Bay, James Ross Island Schools * The Hurst School, Baughurst, Hampshire, England * Hurst High School, Norvelt, Pennsylvania, United States * Hurst Junior High School, Hurst, Texas, United States Other uses * Hurst (surname) * C. Hurst & Co., British publishing company * , the name of more than one United States Navy ship * Hurst Street, Birmingham, England * Ashton United F.C., an English football club founded as Hurst F.C. in 1878 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Occulting Light
A light characteristic is all of the properties that make a particular navigational light identifiable. Graphical and textual descriptions of navigational light sequences and colours are displayed on nautical charts and in Light Lists with the chart symbol for a lighthouse, lightvessel, buoy or sea mark with a light on it. Different lights use different colours, frequencies and light patterns, so mariners can identify which light they are seeing. Abbreviations While light characteristics can be described in prose, e.g. "Flashing white every three seconds", lists of lights and navigation chart annotations use abbreviations. The abbreviation notation is slightly different from one light list to another, with dots added or removed, but it usually follows a pattern similar to the following (see the chart to the right for examples). * An abbreviation of the type of light, e.g. "Fl." for flashing, "F." for fixed. * The color of the light, e.g. "W" for white, "G" for green, "R" for red, " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sconce Point
Fort Victoria is a former military fort on the Isle of Wight, England (), built to guard the Solent. The earliest fort on the site was a coastal fort known as Sharpenode Bulwark built in 1545–1547 by Henry VIII of England, Henry VIII, but these defences had fallen into disrepair by the 17th century. Fort Victoria was built in the 1850s. It was a brick-built triangular fort with two seaward batteries meeting at a right angle. It remained in use until 1962. Parts of the fort were subsequently demolished; areas of the fort that were preserved have become part of Fort Victoria Country Park. Location Fort Victoria is situated on Sconce Point west of Yarmouth, Isle of Wight, Yarmouth. Its position overlooks the whole of the The Needles, Needles Passage and approaches to Yarmouth, and is almost opposite Hurst Castle on the mainland. Around 1 kilometer to the southwest lies Fort Albert. Earlier forts The earliest fort on the site was Sharpenode Bulwark (also Sharpnode or Sharpnore) wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sector Light
A sector light is a man-made pilotage and position fixing aid that consists of strictly delineated horizontal angle light beams to guide water-borne traffic through a safe channel at night in reasonable visibility. Sector lights are most often used for safe passage through shallow or dangerous waters. This may be when leaving or entering harbour. Nautical charts (paper and electronic) give all the required information. Sectors of colored glass (or plastic) are placed in the lanterns of these lights. The light will then show these colors when observed certain bearings. Bearings referring to a sector are given in degrees true, as observed from sea. Though the colors of the light will change, the characteristics will not. The change of color is not abrupt. The transition is made through an arc of uncertainty of 2° or greater. The colors that are used, are conform to the IALA Maritime Buoyage system that is designed by the International Association of Lighthouse Authorities: * whit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bishop's Rock Lighthouse
The Bishop Rock ( kw, Men Epskop) is a skerry off the British coast in the northern Atlantic Ocean known for its lighthouse. It is in the westernmost part of the Isles of Scilly, an archipelago off the southwestern tip of the Cornish peninsula of Great Britain. The ''Guinness Book of Records'' lists it as the world's smallest island with a building on it. The original iron lighthouse was begun in 1847 but was washed away before it could be completed. The present building was completed in 1858 and was first lit on 1September that year. Before the installation of the helipad, visitors to the lighthouse would rappel from the top (with winches installed at the lamp level and at the base below) to boats waiting away from the lighthouse. Bishop Rock is also at the eastern end of the North Atlantic shipping route used by ocean liners in the first half of the 20th century; the western end being the entrance to Lower New York Bay. This was the route that ocean liners took when compet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
St Catherine's Lighthouse
St Catherine's Lighthouse is a lighthouse located at St Catherine's Point at the southern tip of the Isle of Wight. It is one of the oldest lighthouse locations in Great Britain. Origins The first lighthouse was established on St Catherine's Down in 1323 on the orders of the Pope John XXII, Pope, after a ship ran aground nearby and its cargo was either lost or plundered. Once part of St Catherine's Oratory, its octagonal stone tower can still be seen today on the hill to the west of Niton, Isle of Wight, Niton. It is known locally as the "Pepperpot". Nearby there are the footings of a replacement lighthouse begun in 1785, but this was never completed because the hill is prone to dense fog. It is sometimes called the "salt pot". History The new lighthouse, built by Trinity House in 1838, was constructed as a stone tower. When first built the light was oil-fuelled; its lamp, with four concentric wicks, was set within a large (First order Fresnel lens, first-order) fixed Fre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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