|
Dent Island Light
Dent Island Light is an active lighthouse on Dent Island (Queensland), Dent Island, a small island off the coast of Queensland, Australia, part of the Whitsunday Group of the Whitsunday Islands. Located on the southwest tip of the island, the light guides ships navigating the Whitsunday Passage, between Whitsunday Island and the islands to the west, and marks the Dent Island Passage. From its inception, the lighthouse was closely connected to Cape Cleveland Light. Both lighthouses were recommended, approved, tendered and finally, in December 1879, constructed together. The light had two upgrades in the 1920s, replacing both the oil lamp and fourth-order lens with an incandescent gas mantle and a new lens. In 1983, it was converted to solar power; and was demanned in 1987. The lighthouse is a typical for Queensland, made of a timber frame cladding (construction), clad with galvanized iron plates. It is topped by a Chance Brothers lantern room, and painted white with a red dome. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dent Island (Queensland)
Dent Island is an island just off the coast of Queensland, Australia. Dent Island is located at . Dent Island is part of the Whitsunday Group and lies immediately west of Hamilton Island. The Whitsunday Group is one of the Island Groups that together comprise the Whitsunday Islands (also known as the Greater Whitsunday Islands or Greater Whitsundays). The earliest charts of the Whitsunday area showed only one island, named 'Passage Island' where Dent Island and Hamilton Island currently lie. It was not until 1866, when Commander G. S. Nares, Royal Navy, on , carried out a detailed survey of the northern waters of the Whitsunday Passage that the charts were amended to show two separate islands. Dent Island was named after Lieutenant Albert Dent of HMS ''Salamander''. Another small mangrove island in Queensland is known locally as "Dent Island", It is located in the Proserpine River just downstream of the mouth of Saltwater Creek. It was given the name after the 33-ton steamer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low Isles Light
Low Isles Light, also known as Low Islets Light or Low Island Light, is an active lighthouse located on Low Island, a coral cay which together with Woody Island forms the Low Isles group, about northeast of Port Douglas, Queensland, Australia. The island is situated on the western edge of the main shipping channel into the harbour of Port Douglas, and it marks the entrance to the channel. Built in 1878, it was the first lighthouse in Far North Queensland and more specifically the first to light the Inner Passage of the Great Barrier Reef. Its construction is typical to Queensland lighthouses of the time, timber frame clad with galvanized iron, and it is the fourth lighthouse of this type constructed in Queensland, though it is the first of them to use portholes. The lighthouse was recommended in February 1876 but construction of the lighthouse and cottages, by W. P. Clark, started more than a year later. The structures were ready and the light was lit in late 1878. The origina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cast Iron
Cast iron is a class of iron–carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its color when fractured: white cast iron has carbide impurities which allow cracks to pass straight through, grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the material breaks, and ductile cast iron has spherical graphite "nodules" which stop the crack from further progressing. Carbon (C), ranging from 1.8 to 4 wt%, and silicon (Si), 1–3 wt%, are the main alloying elements of cast iron. Iron alloys with lower carbon content are known as steel. Cast iron tends to be brittle, except for malleable cast irons. With its relatively low melting point, good fluidity, castability, excellent machinability, resistance to deformation and wear resistance, cast irons have become an engineering material with a wide range of applications and are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dent Island And Cape Cleveland Lighthouses - Tower, 1878
Dent may refer to: People * Dent (surname) * Dent May (active 2007), American musician * Dent Mowrey (1888–1960), American composer, musician and music teacher * Dent Oliver (1918–1973), international speedway rider Places France * Dent d'Oche, Haute-Savoie * Dent de Burgin, Savoie * Dent Parrachée, Savoie * Denting, Moselle Switzerland * Dent Blanche, a mountain in the Pennine Alps * Dent d'Hérens (shared with Italy), a mountain in the Pennine Alps * Dent de Lys, a mountain in the Bernese Alps (Swiss Prealps) * Dents du Midi, a multi-summited mountain situated in the Chablais Alps United Kingdom * Dent (fell), near England's Lake District in Cleator Moor, Copeland, Cumbria * Dent, South Lakeland, a village near Sedbergh in Cumbria, formerly in Yorkshire ** Dent railway station * Dent Bank, a small village in County Durham * Dent Fault, in northern England * Dent Group, a group of Upper Ordovician sedimentary and volcanic rocks in northwest England United States * De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halogen Lamp
A halogen lamp (also called tungsten halogen, quartz-halogen, and quartz iodine lamp) is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen, such as iodine or bromine. The combination of the halogen gas and the tungsten filament produces a halogen-cycle chemical reaction, which redeposits evaporated tungsten on the filament, increasing its life and maintaining the clarity of the envelope. This allows the filament to operate at a higher temperature than a standard incandescent lamp of similar power and operating life; this also produces light with higher luminous efficacy and color temperature. The small size of halogen lamps permits their use in compact optical systems for projectors and illumination. The small glass envelope may be enclosed in a much larger outer glass bulb, which has a lower temperature, protects the inner bulb from contamination, and mak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watt
The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Watt (1736–1819), an 18th-century Scottish inventor, mechanical engineer, and chemist who improved the Newcomen engine with his own steam engine in 1776. Watt's invention was fundamental for the Industrial Revolution. Overview When an object's velocity is held constant at one metre per second against a constant opposing force of one newton, the rate at which work is done is one watt. : \mathrm In terms of electromagnetism, one watt is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potential difference of one volt (V), meaning the watt is equivalent to the volt-ampere (the latter unit, however, is used for a different quantity from the real power of an electrical circuit). : ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volt
The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827). Definition One volt is defined as the electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. Equivalently, it is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it. It can be expressed in terms of SI base units ( m, kg, second, s, and ampere, A) as : \text = \frac = \frac = \frac. It can also be expressed as amperes times ohms (current times resistance, Ohm's law), webers per second (magnetic flux per time), watts per ampere (power per current), or joules per coulomb (energy per charge), which is also equivalent to electronvolts per elementary charge: : \text = \tex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Characteristic
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] |
Solar Power
Solar power is the conversion of energy from sunlight into electricity, either directly using photovoltaics (PV) or indirectly using concentrated solar power. Photovoltaic cells convert light into an electric current using the photovoltaic effect. Concentrated solar power systems use lenses or mirrors and solar tracking systems to focus a large area of sunlight to a hot spot, often to drive a steam turbine. Photovoltaics were initially solely used as a source of electricity for small and medium-sized applications, from the calculator powered by a single solar cell to remote homes powered by an off-grid rooftop PV system. Commercial concentrated solar power plants were first developed in the 1980s. Since then, as the cost of solar electricity has fallen, grid-connected solar PV systems have grown more or less exponentially. Millions of installations and gigawatt-scale photovoltaic power stations continue to be built, with half of new generation capacity being solar in 2021. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clockwork
Clockwork refers to the inner workings of either mechanical devices called clocks and watches (where it is also called the movement) or other mechanisms that work similarly, using a series of gears driven by a spring or weight. A clockwork mechanism is often powered by a clockwork motor, description of the clockwork motor in an antique phonograph consisting of a mainspring, a spiral torsion spring of metal ribbon. Energy is stored in the mainspring manually by ''winding it up'', turning a key attached to a ratchet which twists the mainspring tighter. Then the force of the mainspring turns the clockwork gears, until the stored energy is used up. The adjectives ''wind-up'' and ''spring-powered'' refer to mainspring-powered clockwork devices, which include clocks and watches, kitchen timers, music boxes, and wind-up toys. History The earliest known example of a clockwork mechanism is the Antikythera mechanism, a first-century BC geared analogue computer, somewhat astrolabe-li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kerosene
Kerosene, paraffin, or lamp oil is a combustible hydrocarbon liquid which is derived from petroleum. It is widely used as a fuel in aviation as well as households. Its name derives from el, κηρός (''keros'') meaning "wax", and was registered as a trademark by Canadian geologist and inventor Abraham Gesner in 1854 before evolving into a generic trademark. It is sometimes spelled kerosine in scientific and industrial usage. The term kerosene is common in much of Argentina, Australia, Canada, India, New Zealand, Nigeria, and the United States, while the term paraffin (or a closely related variant) is used in Chile, eastern Africa, South Africa, Norway, and in the United Kingdom. The term lamp oil, or the equivalent in the local languages, is common in the majority of Asia and the Southeastern United States. Liquid paraffin (called mineral oil in the US) is a more viscous and highly refined product which is used as a laxative. Paraffin wax is a waxy solid extracted from pet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
