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Capstan (nautical)
A capstan is a vertical-axled rotating machine developed for use on sailing ships to multiply the pulling force of sailors when hauling ropes, Nautical cable, cables, and hawsers. The principle is similar to that of the windlass, which has a horizontal axle. History The word, connected with the Old French or , from Old Provençal , from "pulley cord", from Latin , a halter, from , to take hold of, seems to have come into English (14th century) from Portuguese or Spanish shipmen at the time of the Crusades. Both device and word are considered Spanish inventions. Early form In its earliest form, the capstan consisted of a timber mounted vertically through a vessel's structure which was free to rotate. Levers, known as bars, were inserted through holes at the top of the timber and used to turn the capstan. A rope wrapped several turns around the drum was thus hauled upon. A rudimentary ratchet (device), ratchet was provided to hold the tension. The ropes were always wound i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winch
A winch is a mechanical device that is used to pull in (wind up) or let out (wind out) or otherwise adjust the tension (physics), tension of a rope or wire rope (also called "cable" or "wire cable"). In its simplest form, it consists of a Bobbin, spool (or drum) attached to a hand crank (mechanism), crank. Traditionally, winches on ships accumulated wire or rope on the drum; those that do not accumulate, and instead pass on the wire/rope (see yacht photo above), are called Capstan_(nautical), capstans. Despite this, sailboat capstans are most often referred to as winches. Winches are the basis of such machines as tow trucks, steam shovels and elevators. More complex designs have gear assemblies and can be powered by electric, hydraulic, pneumatic or internal combustion drives. It might include a solenoid brake and/or a Mechanical brake stretch wrapper, mechanical brake or ratchet (device), ratchet and pawl which prevents it unwinding unless the pawl is retracted. The rope may b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Visitors Holding Capstan Bars Turn The Capstan
Visitor, in English and Welsh law, is an academic or ecclesiastical title. Visitor, The Visitor or Visitors may also refer to: Geography * Visitor (mountain), a mountain in eastern Montenegro * Lake Visitor, a mountain lake in eastern Montenegro Literature * ''Visitor'' (novel), a 2016 novel by C. J. Cherryh * ''Visitors'' (''Buffy'' novel), a 1999 novel by Laura Anne Gilman and Josepha Sherman * ''Visitors'' (Card novel), a 2014 novel by Orson Scott Card * ''Visitors'' (play), a 2014 play by Barney Norris * ''The Visitor'' (Applegate novel), a 1996 novel by K. A. Applegate, the second installment in the ''Animorphs'' series * ''The Visitor'' (Child novel), a 2000 novel by Lee Child * "The Visitor" (short story), a 1965 short story by Roald Dahl * ''The Visitor'' (play), a 1993 play by Eric-Emmanuel Schmitt * ''The Visitors'' (novel), a 1980 novel by Clifford D. Simak * ''The Visitors'' (play), a 1961 play by Joe Orton * ''Visitors'', a 1997 novel by Anita Brookner * ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weigh Anchor
Weigh anchor is a nautical term indicating the final preparation of a sea vessel for getting underway. ''Weighing anchor'' literally means raising the anchor of the vessel from the sea floor and hoisting it up to be stowed on board the vessel. At the moment when the anchor is no longer touching the sea floor, it is ''aweigh.'' Example of use s narrative is described in part in Dictionary of American Naval Fighting Ships, DANFS as "On 17 January 1945 she ''weighed anchor'' and began a -month cruise to Kodiak, Alaska." When not at anchor When a vessel is not at anchor, but tied to a pier or to another anchored vessel, it does not weigh anchor; the captain or master gives the order to "take in lines." References * Nautical terminology Ship anchors {{Water-transport-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reel-to-reel Audio Tape Recording
Reel-to-reel audio tape recording, also called open-reel recording, is Magnetic tape#Audio, magnetic tape audio recording in which the recording tape is spooled between reels. To prepare for use, the ''supply reel'' (or ''feed reel'') containing the tape is placed on a spindle or hub. The end of the tape is manually pulled from the reel, threaded through mechanical guides and over a tape head assembly, and attached by friction to the hub of the second, initially empty ''takeup reel''. Reel-to-reel systems use tape that is wide, which normally moves at . Domestic consumer machines almost always used or narrower tape and many offered slower speeds such as . All standard tape speeds are derived as a binary submultiple of 30 inches per second. Reel-to-reel preceded the development of the compact cassette with tape wide moving at . By writing the same audio signal across more tape, reel-to-reel systems give much greater High fidelity, fidelity at the cost of much larger tapes. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassette Tape
The Compact Cassette, also commonly called a cassette tape, audio cassette, or simply tape or cassette, is an analog audio, analog magnetic tape recording format for Sound recording and reproduction, audio recording and playback. Invented by Lou Ottens and his team at the Netherlands, Dutch company Philips, the Compact Cassette was released in August 1963. Compact Cassettes come in two forms, either containing content as a prerecorded cassette (''Musicassette''), or as a fully recordable "blank" cassette. Both forms have two sides and are reversible by the user. Although List of magnetic tape cartridges and cassettes, other tape cassette formats have also existed—for example the Microcassette—the generic term ''cassette tape'' is normally used to refer to the Compact Cassette because of its ubiquity. From 1983 to 1991 the cassette tape was the most popular Timeline of audio formats, audio format for new Record sales, music sales in the United States. Compact Cassettes con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capstan (tape Recorder)
A tape transport is the collection of parts of a magnetic tape player or tape recorder, recorder that move the tape and play or record it. Transport parts include the head, capstan, pinch roller, tape pins, and tape guide. The tape transport as a whole is called the ''transport mechanism''. Tape head The tape head is the part of a tape recording or playback device which converts the magnetic fluctuations present in the tape into an electrical signal, which is then amplified and sent to speakers or headphones. The tape head is set off-center in a multitrack device in order to record or play one or more tracks running in each direction of the tape (e.g. the two different tracks present on most, if not all, Cassette tape, compact cassettes). Capstan The capstan is a rotating Spindle (tool), spindle used to move recording tape through the mechanism of a tape recorder. The tape is threaded between the capstan and one or more rubber-covered wheels, called pinch rollers, which press ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Tape
Magnetic tape is a medium for magnetic storage made of a thin, magnetizable coating on a long, narrow strip of plastic film. It was developed in Germany in 1928, based on the earlier magnetic wire recording from Denmark. Devices that use magnetic tape can with relative ease record and play back audio, visual, and binary computer data. Magnetic tape revolutionized sound recording and reproduction and broadcasting. It allowed radio, which had always been broadcast live, to be recorded for later or repeated airing. Since the early 1950s, magnetic tape has been used with computers to store large quantities of data and is still used for backup purposes. Magnetic tape begins to degrade after 10–20 years and therefore is not an ideal medium for long-term archival storage. The exception is data tape formats like Linear Tape-Open, LTO which are specifically designed for long-term archiving. Information in magnetic tapes is often recorded in tracks which are narrow and long areas of in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassette Deck
A cassette deck is a type of tape machine for playing and recording audio cassettes that does not have a built-in power amplifier or speakers, and serves primarily as a Transport (recording), transport. It can be a part of an automotive entertainment system, a part of a portable audio system or a part of a home High fidelity#Modularity, component system. In the latter case, it is also called a component cassette deck or just a component deck. History Roots The first consumer tape recorder to employ a tape reel permanently housed in a small removable cartridge was the RCA tape cartridge, which appeared in 1958 as a predecessor to the cassette format. At that time, reel-to-reel recorders and players were commonly used by enthusiasts but required large individual reels and tapes which had to be threaded by hand, making them less accessible to the casual consumer. Both RCA and Bell Sound attempted to commercialize the cartridge format, but a few factors stalled adoption, inclu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yachting
Yachting is recreational boating activities using medium/large-sized boats or small ships collectively called yachts. Yachting is distinguished from other forms of boating mainly by the priority focus on comfort and luxury, the dependence on marinas for docking, and being typically only for exclusive social leisures such as cruising, fishing trip or racing. The term "''yacht''" derives from the Dutch word '' jacht'', meaning "hunt". When yachting with sailboats, the activity is simply called sailing; and with motorboats, it is called powerboating. A boat club that only services yachting participants is known as a yacht club. Racing History The history of sailing dates back to prehistoric times but the racing of sailing boats is believed to have started in the Netherlands some time in the 17th century. Soon, in England, custom-built racing " yachts" began to emerge. In 1851, the Royal Yacht Squadron in Cowes challenged the American yacht ''America''. The race took pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torque
In physics and mechanics, torque is the rotational analogue of linear force. It is also referred to as the moment of force (also abbreviated to moment). The symbol for torque is typically \boldsymbol\tau, the lowercase Greek letter ''tau''. When being referred to as moment of force, it is commonly denoted by . Just as a linear force is a push or a pull applied to a body, a torque can be thought of as a twist applied to an object with respect to a chosen point; for example, driving a screw uses torque to force it into an object, which is applied by the screwdriver rotating around its axis to the drives on the head. Historical terminology The term ''torque'' (from Latin , 'to twist') is said to have been suggested by James Thomson and appeared in print in April, 1884. Usage is attested the same year by Silvanus P. Thompson in the first edition of ''Dynamo-Electric Machinery''. Thompson describes his usage of the term as follows: Today, torque is referred to using d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prime Mover
Prime mover may refer to: Philosophy *Unmoved mover, a concept in Aristotle's writings Engineering * Prime mover (engine or motor), a machine that converts various other forms of energy (chemical, electrical, fluid pressure/flow, etc.) into energy of movement * Prime mover (locomotive), one of the several types of power plants used in locomotives to provide traction power * Prime mover (tractor unit), a heavy-duty towing engine that provides motive power for hauling a towed or trailered load Anatomy * Prime mover, another name for an agonist muscle Entertainment * ''Prime Mover'' (film), a 2009 Australian romantic crime film * Prime Mover (comics), a fictional character in the Marvel Universe * ''Prime Mover'', a video game published by Psygnosis in 1993 * " The Prime Mover", a 1961 episode of ''The Twilight Zone'' * The Prime Movers, a quasi-omniscient race of alien superbeings in the '' Buck Godot'' comic series by Phil Foglio Music * ''Prime Mover'' (album), a 1988 albu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gearbox
A transmission (also called a gearbox) is a mechanical device invented by Louis Renault (who founded Renault) which uses a gear set—two or more gears working together—to change the speed, direction of rotation, or torque multiplication/reduction in a machine. Transmissions can have a single fixed-gear ratio, multiple distinct gear ratios, or continuously variable ratios. Variable-ratio transmissions are used in all sorts of machinery, especially vehicles. Applications Early uses Early transmissions included the right-angle drives and other gearing in windmills, horse-powered devices, and steam-powered devices. Applications of these devices included pumps, mills and hoists. Bicycles Bicycles traditionally have used hub gear or Derailleur gear transmissions, but there are other more recent design innovations. Automobiles Since the torque and power output of an internal combustion engine (ICE) varies with its rpm, automobiles powered by ICEs require multiple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
