A coil is a series of loops. A coiled coil is a structure in which the coil itself is in turn also looping.
Electromagnetic coils [link]
An electromagnetic coil (or simply a "coil") is formed when a conductor (usually an insulated solid copper wire) is wound around a core or form to create an inductor or electromagnet. One loop of wire is usually referred to as a turn, and a coil consists of one or more turns. For use in an electronic circuit, electrical connection terminals called taps are often connected to a coil. Coils are often coated with varnish or wrapped with insulating tape to provide additional insulation and secure them in place. A completed coil assembly with taps is often called a winding. A transformer is an electromagnetic device that has a primary winding and a secondary winding that transfers energy from one electrical circuit to another by inductive coupling without moving parts. The term tickler coil usually refers to a feedback coil, which is often the third coil placed in relation to a primary coil and secondary coil. A coil tap is a wiring feature found on some electrical transformers, inductors and coil pickups, all of which are sets of wire coils. The coil tap(s) are points in a wire coil where a conductive patch has been exposed (usually on a loop of wire that extends out of the main coil body). As self induction is larger for larger coil diameter the current in a thick wire tries to flow on the inside. The ideal use of copper is achieved by foils. Sometimes this means that a spiral is a better alternative. Multilayer coils have the problem of interlayer capacitance, so when multiple layers are needed the shape needs to be radically changed to a short coil with many layers so that the voltage between consecutive layers is smaller (making them more spiral like).
Analysis [link]
See Inductor
Further reading [link]
- Querfurth, William, "Coil winding; a description of coil winding procedures, winding machines and associated equipment for the electronic industry" (2d ed.). Chicago, G. Stevens Mfg. Co., 1958.
- Weymouth, F. Marten, "Drum armatures and commutators (theory and practice) : a complete treatise on the theory and construction of drum winding, and of commutators for closed-coil armatures, together with a full résumé of some of the principal points involved in their design; and an exposition of armature reactions and sparking". London, "The Electrician" Printing and Publishing Co., 1893.
- "Coil winding proceedings". International Coil Winding Association.
- Chandler, R. H., "Coil coating review, 1970-76". Braintree, R. H. Chandler Ltd, 1977.
External links [link]
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Look up coil or winding in Wiktionary, the free dictionary. |
- R. Clarke, "Producing wound components". Surrey.ac.uk, 2005 October 9
https://wn.com/Coil
Coil (band)
Coil was an English cross-genre, experimental music group formed in 1982 by John Balance—later credited as "Jhonn Balance"—and his life partner and collaborator Peter Christopherson, aka "Sleazy". The duo worked together on a series of releases before Balance chose the name Coil, which he claimed to be inspired by the omnipresence of the coil's shape in nature. Today, Coil remains one of the most influential and best-known industrial music groups.
The group's first official release as Coil was a 1984 12" album titled How to Destroy Angels released on the Belgian Les Disques du Crépuscule's sublabel LAYLAH Antirecords. Following the 12"s success, Some Bizarre Records produced two albums, Scatology, Horse Rotorvator and Coil departed SomeBizzare Label and Produced Love's Secret Domain, which met with little commercial success, but were praised as innovative due to their blend of industrial music and acid house.
In 1985, the group began working on a series of soundtracks, amongst them music for the first Hellraiser movie based on the novel The Hellbound Heart by their acquaintance at that time, Clive Barker. The group's first live performance in 16 years occurred in 1999, and began a series of mini-tours that would last until 2004. Following the death of John Balance on 13 November 2004, Christopherson announced via their official record label website Threshold House that Coil as an entity had ceased to exist.
Coil (album)
Coil is an album by Toad the Wet Sprocket released in 1997. It is their fifth studio album, and the final one before the band broke up in 1998. As with previous albums, Coil was released under the Columbia Records label and produced by Gavin MacKillop.
This album has been praised by some as the band's most mature album. It combines themes explored in all of their previous albums - including love, spirituality and the virtues of an uncomplicated life - and it continues the straightforward rock sound found in Dulcinea. One song from the album, "Come Down", hit the Billboard Modern Rock and Mainstream Rock Charts, and the single "Crazy Life" explores the perceived injustices experienced by Leonard Peltier. "Whatever I Fear" was also released as a single but failed to chart with poor backing from Columbia Records; thus in turn, the planned fourth single "Dam Would Break" was never released.
Track listing
Studio outtakes
List of Pokémon (52–101)
The Pokémon (ポケモン Pokemon) franchise has 721 (as of the release of Pokémon Omega Ruby and Alpha Sapphire) distinctive fictional species classified as the titular Pokémon. This is a selected listing of 50 of the Pokémon species, originally found in the Red and Green versions, arranged as they are in the main game series' National Pokédex.
Meowth
Meowth (ニャース Nyāsu, Nyarth), known as the Scratch Cat Pokémon, has a distinctly feline appearance, resembling a small housecat. It has cream-colored fur, which turns brown at its paws and tail tip. Its oval-shaped head features prominent whiskers, black-and-brown ears, and a koban, a gold oval coin (also known as "charm") embedded in its forehead. Meowth are valued for their ability to collect coins using their signature move, "Pay Day", as it is the only Pokémon that learns it. Meowth's coloration, its love of coins, and its charm indicate that Meowth is based on the Japanese Maneki Neko, a cat-shaped figurine that is said to bring good luck and money to its owner. Aspects of Meowth were drawn from a Japanese myth dealing with the true value of money, in which a cat has money on its head but does not realize it.
Electromagnetic coil
An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil, spiral or helix. Electromagnetic coils are used in electrical engineering, in applications where electric currents interact with magnetic fields, in devices such as inductors, electromagnets, transformers, and sensor coils. Either an electric current is passed through the wire of the coil to generate a magnetic field, or conversely an external time-varying magnetic field through the interior of the coil generates an EMF (voltage) in the conductor.
A current through any conductor creates a circular magnetic field around the conductor due to Ampere's law. The advantage of using the coil shape is that it increases the strength of magnetic field produced by a given current. The magnetic fields generated by the separate turns of wire all pass through the center of the coil and add (superpose) to produce a strong field there. The more turns of wire, the stronger the field produced. Conversely, a changing external magnetic flux induces a voltage in a conductor such as a wire, due to Faraday's law of induction. The induced voltage can be increased by winding the wire into a coil, because the field lines intersect the circuit multiple times.
Coil (hieroglyph)
The coil hieroglyph is used in the Ancient Egyptian language hieroglyphs as an equivalent for the Quail chick (hieroglyph), but is also used in other word constructions, probably for the balance of the hieroglyph composition block. The coil as well as the quail chick are used for the alphabetic vowel letter w, (or u). Because 'w' is not a "vowel", the use is often in the form of 'woo' for the w, and 'oo' for the u.
Quail chick or coil, the plural
The Egyptian hieroglyph alphabetic letters
The following two tables show the Egyptian uniliteral signs. (24 letters, but multiple use hieroglyphs)
External wall relief; (foot and leg hieroglyphs)
External wall relief; (foot and leg hieroglyphs)
Column relief
Column relief
