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Lowestoft Lighthouse
Lowestoft Lighthouse is a lighthouse operated by Trinity House located to the north of the centre of Lowestoft in the English county of Suffolk. It stands on the North Sea coast close to Ness Point, the most easterly point in the United Kingdom. It acts as a warning light for shipping passing along the east coast and is the most easterly lighthouse in the UK. The original lighthouses at Lowestoft, which were established in 1609, were the first lights to be built by Trinity House.History of the Corporation Trinity House, 2014. Retrieved 2016-08-31.Labrum EA (1994 22. Lowestoft Lighthouse in ''Civ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lowestoft
Lowestoft ( ) is a coastal town and civil parish in the East Suffolk (district), East Suffolk district of Suffolk, England.OS Explorer Map OL40: The Broads: (1:25 000) : . As the List of extreme points of the United Kingdom, most easterly UK settlement, it is north-east of London, north-east of Ipswich and south-east of Norwich, and the main town in its district. The estimated population in the built-up area exceeds 70,000. Its development grew with the fishing industry and as a seaside resort with wide sandy beaches. As fishing declined, Petroleum industry, oil and gas exploitation in the North Sea in the 1960s took over. While these too have declined, Lowestoft is becoming a regional centre of the renewable energy industry. History Some of the earliest signs of settlement in Britain have been found here. Flint tools discovered in the Pakefield cliffs of south Lowestoft in 2005 allow human habitation of the area to be traced back 700,000 years.S. Parfitt et al. (2006'700,000 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parabolic Reflectors
A parabolic (or paraboloid or paraboloidal) reflector (or dish or mirror) is a reflective surface used to collect or project energy such as light, sound, or radio waves. Its shape is part of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. The parabolic reflector transforms an incoming plane wave travelling along the axis into a spherical wave converging toward the focus. Conversely, a spherical wave generated by a point source placed in the focus is reflected into a plane wave propagating as a collimated beam along the axis. Parabolic reflectors are used to collect energy from a distant source (for example sound waves or incoming star light). Since the principles of reflection are reversible, parabolic reflectors can also be used to collimate radiation from an isotropic source into a parallel beam. In optics, parabolic mirrors are used to gather light in reflecting telescopes and solar furnaces, and project a beam of light in f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Tangye
Sir Richard Trevithick Tangye (24 November 183314 October 1906) was a British manufacturer of engines and other heavy equipment. Biography Richard Tangye was born at Illogan, near Redruth, Cornwall, the fifth son in a family of six sons and three daughters of Joseph Tangye (1798-1854), a Quaker miner of Redruth, later a small shopkeeper and farmer, and Ann, née Bullock. As a young boy he worked in the fields, but when he was eight years old he was incapacitated from further manual labour by a fracture of the right arm. His father then determined to give him the best education he could afford, and young Tangye was sent to the Quaker Sidcot School in the Mendip Hills near the village of Winscombe, Somerset, where he progressed rapidly and became a pupil-teacher. Career Tangye disliked this role, and through an advertisement in '' The Friend'' obtained a clerkship in a small engineering firm in Birmingham, where two of his brothers, skilled mechanics, subsequently joined him. He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed Pipe
A reed pipe (also referred to as a ''lingual'' pipe) is an organ pipe that is sounded by a vibrating brass strip known as a ''reed''. Air under pressure (referred to as ''wind'') is directed towards the reed, which vibrates at a specific pitch. This is in contrast to flue pipes, which contain no moving parts and produce sound solely through the vibration of air molecules. Reed pipes are common components of pipe organs. Stop Reed pipes include all stops of the "Reed" class, and some stops from the "Hybrid" class. The reed stops of an organ are collectively called the "reed-work". Construction A reed pipe comprises a metal ''tongue'' (the reed) which rests against a ''shallot'', in which is carved a tunnel. The reed and shallot are held in place by a wooden ''wedge''. This assembly protrudes from the underside of the ''block'' and hangs down into the ''boot''. A ''tuning wire'' is inserted through the boot and is bent to hold the reed against the shallot. The wire is moved up ... [...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] |
Mineral Oil
Mineral oil is any of various colorless, odorless, light mixtures of higher alkanes from a mineral source, particularly a distillate of petroleum, as distinct from usually edible vegetable oils. The name 'mineral oil' by itself is imprecise, having been used for many specific oils over the past few centuries. Other names, similarly imprecise, include 'white oil', 'paraffin oil', ' liquid paraffin' (a highly refined medical grade), (Latin), and 'liquid petroleum'. Most often, mineral oil is a liquid by-product of refining crude oil to make gasoline and other petroleum products. This type of mineral oil is a transparent, colorless oil, composed mainly of alkanes and cycloalkanes, related to petroleum jelly. It has a density of around . Nomenclature Some of the imprecision in the definition of the names used for mineral oil (such as 'white oil') reflects usage by consumers and merchants who did not know, and usually had no need of knowing, the oil's precise chemical mak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roadstead
A roadstead (or ''roads'' – the earlier form) is a body of water sheltered from rip currents, spring tides, or ocean swell where ships can lie reasonably safely at anchor without dragging or snatching.United States Army technical manual, TM 5-360. Port Construction and Rehabilitation'. Washington: United States. Government Printing Office, 1964. It can be open or natural, usually estuary-based, or may be created artificially. In maritime law, it is described as a "known general station for ships, notoriously used as such, and distinguished by the name". Definition A roadstead can be an area of safe anchorage for ships waiting to enter a port, or to form a convoy. If sufficiently sheltered and convenient, it can be used for the transshipment of goods, stores, and troops, either separately or in combination. The same applies in transfers to and from shore by lighters. In the days of sailing ships, some voyages could only easily be made with a change in wind direction, and shi ... [...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: * whi ... [...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, Cambri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catadioptric
A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors ( catoptrics). Catadioptric combinations are used in focusing systems such as searchlights, headlamps, early lighthouse focusing systems, optical telescopes, microscopes, and telephoto lenses. Other optical systems that use lenses and mirrors are also referred to as "catadioptric", such as surveillance catadioptric sensors. Early catadioptric systems Catadioptric combinations have been used for many early optical systems. In the 1820s, Augustin-Jean Fresnel developed several catadioptric lighthouse reflectors. Léon Foucault developed a catadioptric microscope in 1859 to counteract aberrations of using a lens to image objects at high power. In 1876 a French engineer, A. Mangin, invented what has come to be called the Mangin mirror, a concave glass reflector with the silver surface on the rear side of the glass. The two surface ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 redu ... [...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 mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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