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Underwriter's Knot
The underwriter's knot is used in electrical wiring as strain relief to prevent a cable from being pulled from electrical terminals when the cable is yanked. History Clifford Ashley listed it as an electrician's knot in 1944. He suggested it be used "where rough treatment is expected" and described it as a two-strand wall knot. The name may come from its use by fire underwriters, who understood its importance in electrocution and fire prevention. Function The knot is typically used as a stopper knot where a lamp or appliance cord passes through a hole or slot of a plug or socket. Its purpose is to "reduce strain on the screw terminal connections—where the metal parts of the wires connect to the socket or plug—and prevent the wires from pulling free." See also *List of knots This list of knots includes many alternative names for common knots and lashings. Knot names have evolved over time, and there are many conflicting or confusing naming issues. The overhand kno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wall And Crown Knot
A wall and crown knot is a decorative kind of rope button. The original use of the knot was to put at the end of the ropes on either side of a gangway leading onto a ship as stoppers. A wall and crown knot consists of a wall knot and a crown knot with doubled strands..The strands of the wall knot go over, under twice, and over, while the strands of the crown knot go under, over twice, and under. In the wall and crown knot they are tied in opposite directions. This knot is often confused with a Turk's head knot, as both knots have a basket weave pattern. A Manrope knot(Double wall and crown, #847) is same knot as wall and crown knot but with little changes - crown strands doubled or tripled. in Verrill's book it is made from three-strand and crown strands doubled, in Ashley's book it is made from four-strand and crown strands tripled. File:Double wall and crown.PNG, Double wall and crown A crown knotAshley, Clifford W. (1944). ''The Ashley Book of Knots'', p.116. Doubled ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others. The presence of an electric charge, which can be either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field. When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law. If the charge moves, the electric field would be doing work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an external agent in carrying a unit of positiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Wiring
Electrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, sockets, and light fittings in a structure. Wiring is subject to safety standards for design and installation. Allowable wire and electrical cable, cable types and sizes are specified according to the circuit operating voltage and electric current capability, with further restrictions on the environmental conditions, such as ambient temperature range, moisture levels, and exposure to sunlight and chemicals. Associated circuit protection, control, and distribution devices within a building's wiring system are subject to voltage, current, and functional specifications. Wiring safety codes vary by locality, country, or region. The International Electrotechnical Commission (IEC) is attempting to harmonise wiring standards among member countries, but significant variations in design and installation requirements still exist. Wiring codes of practice and regulat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strain Relief
Cable management refers to management of electrical or optical cable in a cabinet or an installation. The term is used for products, workmanship or planning. Cables can easily become tangled, making them difficult to work with, sometimes resulting in devices accidentally becoming unplugged as one attempts to move a cable. Such cases are known as "cable spaghetti", and any kind of problem diagnosis and future updates to such enclosures could be very difficult. Cable management both supports and contains cables during installation, and makes subsequent maintenance or changes to the cable system easier. Products such as cable trays, cable ladders, and cable baskets are used to support a cable through cabling routes. Cable selection The choice of cables is also important; for instance, ribbon cables used to connect Parallel ATA drives to the motherboard can disrupt the airflow inside of computers, making case fans less effective; most SATA cables are more compact and therefo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Cable
An electrical cable is an assembly of one or more wires running side by side or bundled, which is used to carry electric current. One or more electrical cables and their corresponding connectors may be formed into a ''cable assembly'', which is not necessarily suitable for connecting two devices but can be a partial product (e.g. to be soldered onto a printed circuit board with a connector mounted to the housing). Cable assemblies can also take the form of a cable tree or cable harness, used to connect many terminals together. Etymology The original meaning of ''cable'' in the electrical wiring sense was for submarine telegraph cables that were armoured with iron or steel wires. Early attempts to lay submarine cables without armouring failed because they were too easily damaged. The armouring in these early days (mid-19th century) was implemented in separate factories to the factories making the cable cores. These companies were specialists in manufacturing wire rope of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Terminal
Components of an electrical circuit are electrically connected if an electric current can run between them through an electrical conductor. An electrical connector is an electromechanical device used to create an electrical connection between parts of an electrical circuit, or between different electrical circuits, thereby joining them into a larger circuit. Most electrical connectors have a genderi.e. the male component, called a ''plug'', connects to the female component, or ''socket''. The connection may be removable (as for portable equipment), require a tool for assembly and removal, or serve as a permanent electrical joint between two points. An adapter can be used to join dissimilar connectors. Thousands of configurations of connectors are manufactured for power, data, and audiovisual applications. Electrical connectors can be divided into four basic categories, differentiated by their function: * ''inline'' or ''cable'' connectors permanently attached to a cable, so i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clifford Ashley
Clifford Warren Ashley (December 18, 1881 – September 18, 1947) was an American artist, author, sailor, and knot expert. Life Ashley was born in New Bedford, Massachusetts, son of Abiel Davis Ashley and Caroline Morse. He married Sarah Scudder Clark in 1932, with whom he had two daughters, one of whom is practicing painter Jane Ashley. He also adopted his wife's daughter from a previous marriage. He died in Westport Point, Massachusetts. Education and early work Taking an interest in art while still in high school, he went on to attend the Eric Pape Art School in Boston. In the summer of 1901 Ashley, along with friends N.C. Wyeth and Henry J. Peck, studied under George Noyes in Annisquam, Massachusetts. In the fall, he went on to become a student of Howard Pyle's school in Wilmington, Delaware. Pyle helped secure commissions for his students, and Ashley's early work included book frontispieces and illustrations for magazines such as ''The Delineator'', '' Leslies'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stopper Knot
Stopper may refer to: * Bung, a plug used to stop the opening of a container ** Laboratory rubber stopper, a specific type of bung * Plug (sanitation), used to stop a drainage outlet * Defender (association football), in soccer (association football) * Milkor 37/38mm and 40mm Stopper, a gun * Alternative name for a whitewater hole, in whitewater kayaking * Glossary of contract bridge terms#stopper, Stopper, in the game of bridge * Glossary of baseball (S)#stopper, Stopper, in baseball, a key starting or relief pitcher * Slang for stopwatch, a handheld timepiece designed to measure the amount of time * Stopper knot, a type of a knot at the end of the rope * Stopper, a common name for some plant species in the genus ''Eugenia'' See also * * * Stop (other) {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Knots
This list of knots includes many alternative names for common knots and lashings. Knot names have evolved over time, and there are many conflicting or confusing naming issues. The overhand knot, for example, is also known as the thumb knot. The figure-eight knot is also known as the Savoy knot or the Flemish knot. A * Adjustable Bend – can be easily lengthened or shortened * Adjustable Grip Hitch – a simple hitch which may easily be shifted up and down the rope while slack *Albright Special – used to tie two different diameters of line together, for instance to tie monofilament to braid *Alpine Butterfly (also known as Butterfly Loop) – a static loop mostly used by mountain climbers and rappellers for securing a carabiner to static rope. * Alternate Ring Hitching – covering a ring in hitching can prevent damage * Anchor Bend – attaching a rope to a ring or similar termination *Angler's Loop – knot which forms a fixed loop. Useful for fine or slippery line, it is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Climbing Knots
There are many knots used in climbing, rappelling and mountaineering Mountaineering or alpinism, is a set of outdoor activities that involves ascending tall mountains. Mountaineering-related activities include traditional outdoor climbing, skiing, and traversing via ferratas. Indoor climbing, sport climbing, a .... Popular climbing knots are briefly described and depicted in this article. References External links Rock climbing knotsKnots used in climbing and mountaineering Grog's Index of Climbing Knots {{DEFAULTSORT:Glossary Of Knots Common In Climbing Climbing and mountaineering-related lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double Knots
A double is a look-alike or doppelgänger; one person or being that resembles another. Double, The Double or Dubble may also refer to: Film and television * Double (filmmaking), someone who substitutes for the credited actor of a character * ''The Double'' (1934 film), a German crime comedy film * ''The Double'' (1971 film), an Italian film * ''The Double'' (2011 film), a spy thriller film * ''The Double'' (2013 film), a film based on the Dostoevsky novella * '' Kamen Rider Double'', a 2009–10 Japanese television series ** Kamen Rider Double (character), the protagonist in a Japanese television series of the same name Food and drink * Doppio, a double shot of espresso * Dubbel, a strong Belgian Trappist beer or, more generally, a strong brown ale * A drink order of two shots of hard liquor in one glass * A "double decker", a hamburger with two patties in a single bun Games * Double, action in games whereby a competitor raises the stakes ** , in contract bridge ** Doublin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
