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Hoisting The Union Jack Over Savage Island, 1900
Hoist may refer to: * Hoist (device), a machine for lifting loads * Hoist controller, a machine for raising and lowering goods or personnel by means of a cable * Hydraulic hooklift hoist, another machine * Hoist (mining), another machine * Hoist (flag), the half of a flag nearer to the flagpole * ''Hoist'' (album), by Phish * USS Hoist (ARS-40), a Bolster class rescue and salvage ship acquired by the U.S. Navy during World War II * Hoist (motion), a parliamentary procedure used in Canadian legislative bodies * Patient lift, for lifting people * Outliner, filter for viewing Computing In computing, hoisting may refer to: * Loop-invariant code motion, a compiler optimization * Variable hoisting The syntax of JavaScript is the set of rules that define a correctly structured JavaScript program. The examples below make use of the log function of the console object present in most browsers for standard text output. The JavaScript stand ..., scope rule in JavaScript See also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoist (device)
A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium. The most familiar form is an elevator, the car of which is raised and lowered by a hoist mechanism. Most hoists couple to their loads using a lifting hook. Today, there are a few governing bodies for the North American overhead hoist industry which include the Hoist Manufactures Institute, ASME, and the Occupational Safety and Health Administration. HMI is a product counsel of the Material Handling Industry of America consisting of hoist manufacturers promoting safe use of their products. Types The word “hoist” is used to describe many different types of equipment that lift and lower loads. For example, many people use “hoist” to describe an elevator. The information contained here pertains specially to overhead, cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoist Controller
A hoist controller is the controller for a hoist. The term is used primarily in the context of electrically operated hoists, but it is apparent that the control systems of many 20th century steam hoists also incorporated controllers of significant complexity. Consider the control system of the Quincy Mine No. 2 Hoist. This control system included interlocks to close the throttle valve at the end of trip and to prevent opening the throttle again until the winding engine was reversed. The control system also incorporated a governor to control the speed of the hoist and indicator wheels to show the hoist operator the positions of the skips in the mine shaft. The hoist controllers for modern electric mining hoists have long included such features as automatic starting of the hoist when the weight of coal or ore in the skip reaches a set point, automatic acceleration of the hoist to full speed and automatic deceleration at the end of travel. Hoist controllers need both velocity and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulic Hooklift Hoist
Hydraulic hooklift hoists are mounted on heavy duty trucks to enable hauliers to change out flatbeds, dumpster bodies, and similar containers. Primarily used in conjunction with tilt frame bodies and specialised roller containers, generally designed for the transportation of materials in the waste, recycling, scrap and demolition industries, as well as for disposal of construction debris. The system employs a series of hydraulic rams to hook, lift and hoist the container onto the chassis of the truck. There are several configuration options, and strict guidelinesOffice of the Federal Register (U.S.) (2010) ''Code of Federal Regulations, Title 49, Transportation, Pt. 300-399, Revised as of October 1, 2009'p.475.Government Printing Office. . Retrieved August 2011 which must be followed to ensure that the container is secured on the truck in transit. Load capacity Lift and dump capacities of hydraulic hooklift hoists typically range from . Generally a hoist is capable of lift ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoist (mining)
In underground mining a hoist or winder is used to raise and lower conveyances within the mine shaft. Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (thyristors), however modern large hoists use alternating current drives that are variable frequency controlled. There are three principal types of hoists used in mining applications: Drum hoist Drum hoists are the most common type of hoist used in North America, South Africa and South America. When using a drum hoist the hoisting cable is wound around the drum when the conveyance is lifted. Single-drum hoists can be used in smaller applications, however double-drum hoists easily allow the hoisting of two conveyances in balance (i.e. one skip being lifted while a second skip is being lowered). Drum hoists are mounted on concrete slabs within a hoistroom, the hoisting ropes run from the drum, up to the top ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoist (flag)
Flag terminology is the nomenclature, or system of terms, used in vexillology, the study of flags, to describe precisely the parts, patterns, and other attributes of flags and their display. Flag types Flag elements Basic patterns Flags often inherit traits seen in traditional European heraldry designs and as a result patterns often share names. Techniques in flag display Illustrations Flag illustrations generally depict flags flying from the observer's point of view from left to right, the view known as the obverse (or "front"); the other side is the reverse (or "back"). There are some exceptions, notably some Islamic flags inscribed in Arabic, which is written from right to left; for these the obverse is defined as the side with the hoist to the observer's right. See also * Vexillological symbol Notes References External links * {{Vexillology Vexillology Vexillology Vexi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoist (album)
''Hoist'' (stylized as ''(HOIST)'') is the fifth studio album by the American rock band Phish, released on March 29, 1994 by Elektra Records. At the time of its release, ''Hoist'' was Phish's best selling album to date, peaking at No. 34 on the Billboard 200 albums chart. The album was certified gold by the RIAA on August 19, 1996, and remains the band's best-selling studio release, outsold in their discography only by the platinum-certified ''A Live One''. The album includes "Down with Disease", the band's breakthrough single on American rock radio, reaching the top 40 of ''Billboard'' magazine's Mainstream Rock Tracks chart in June 1994. The band filmed their only official music video for the song, directed by bassist Mike Gordon, which received some airplay on MTV. Title The band suggested a few ideas for the album's title before finally settling on ''Hoist''; one of the alternative suggestions was ''Hung Like a Horse''. The band ruled this out, but decided to keep the visual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Hoist (ARS-40)
USS ''Hoist'' (ARS-40) was a ''Bolster''-class rescue and salvage ship acquired by the United States Navy during World War II. Its task was to come to the aid of stricken vessels. ''Hoist'' was launched 31 March 1945 by the Basalt Rock Company shipyard near Napa, California; sponsored by Mrs. William E. Howard; and commissioned 21 July 1945. End-of-World War II operations After shakedown ''Hoist'' sailed from San Francisco, California, 6 September 1945 to begin salvage operations in the Far East. Pacific Ocean operations ''Hoist'' arrived at Buckner Bay, Okinawa, on 11 October and commenced salvage and repair duties until 23 December. Two days later she arrived at Wakanoura Wan and operated there, and at Sasebo until 15 March 1946. North Atlantic operations ''Hoist'' returned to San Pedro, California, 1 June and sailed for Norfolk, Virginia, 15 July. After overhaul she sailed to Bayonne, New Jersey, and was used for training students at the Naval Training Salvage Sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoist (motion)
A hoist motion (parliamentary procedure), motion is used in Parliament of Canada, Canadian legislative bodies to cause a bill not to be read now, but six months hence, or any number of months hence. In the House of Commons of Canada, House of Commons, if a hoist motion is adopted, it has the effect of defeating the bill. References Parliamentary procedure in Canada {{Canada-poli-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patient Lift
A patient lift (patient hoist, jack hoist, hydraulic lift) may be either a sling lift or a sit-to-stand lift. This is an assistive device that allows patients in hospitals and nursing homes and people receiving home health care to be transferred between a bed and a chair or other similar resting places, by the use of electrical or hydraulic power. Sling lifts are used for patients whose mobility is limited. Sling lifts are mobile (or floor) lifts or overhead lifts (ceiling- or wall-mounted, or using overhead tracks). The sling lift has several advantages. It allows heavy patients to be transferred while decreasing stress on caregivers, while also reducing the number of nursing staff required to move patients. It also reduces the chance of orthopedic injury from lifting patients. Another kind of sling lift, which is called a ceiling lift, can be permanently installed on the ceiling of a room in order to save space. Mistakes using patient lifts may result in serious injury, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Outliner
An outliner (or outline processor) is a specialized type of text editor (word processor) used to create and edit outlines, which are text files which have a tree structure, for organization. Textual information is contained in discrete sections called "nodes", which are arranged according to their topic–subtopic (parent–child) relationships, like the members of a family tree. When loaded into an outliner, an outline may be collapsed or expanded to display as few or as many levels as desired. Outliners are used for storing and retrieving textual information, with terms, phrases, sentences, or paragraphs attached to a tree. So rather than being arranged by document, information is arranged by topic or content. An outline in an outliner may contain as many topics as desired. This eliminates the need to have separate documents, as outlines easily include other outlines just by adding to the tree. The main difference between a hand-written outline and a digital one is that the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loop-invariant Code Motion
In computer programming, loop-invariant code consists of statements or expressions (in an imperative programming language) that can be moved outside the body of a loop without affecting the semantics of the program. Loop-invariant code motion (also called hoisting or scalar promotion) is a compiler optimization that performs this movement automatically. Example In the following code sample, two optimizations can be applied. int i = 0; while (i < n) Although the calculation x = y + z and x * x is loop-invariant, precautions must be taken before moving the code outside the loop. It is possible that the loop condition is false (for example, if n holds a negative value), and in such case, the loop body should not be executed at all. One way of guaranteeing correct behaviour is using a conditional branch outside of the loop. Evaluating the loop condition can have
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