|
Impact Sprinkler
An impact sprinkler (sometimes called an impulse sprinkler) is a type of irrigation sprinkler in which the sprinkler head, driven in a circular motion by the force of the outgoing water, pivots on a bearing on top of its threaded attachment nut. Invented in 1933 by Orton Englehart, it quickly found widespread use. Though it has in many situations been replaced by gear-driven "rotor heads", many varieties of impact sprinkler remain in use. Development The original horizontal action impact drive sprinkler was invented in 1933 and patented in 1935 by Glendora, California citrus grower Orton Englehart. He later sold it to Clem and Mary La Fetra who manufactured and marketed it under the brand name Rain Bird. Design and operation The basic design operates as follows: The sprinkler base is fixed to the water pipe with a threaded attachment nut. The head can pivot on a bearing above the base. The force of the outgoing water flings the sprinkler arm on a circular motion. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impact Sprinkler Mechanism 2
Impact may refer to: * Impact (mechanics), a large force or mechanical shock over a short period of time * Impact, Texas, a town in Taylor County, Texas, US Science and technology * Impact crater, a meteor crater caused by an impact event * Impact event, the collision of a meteoroid, asteroid or comet with Earth * Impact factor, a measure of the citations to a science or social science journal * Impact wrench, a socket wrench power tool capable of high torque Books and magazines * Impact (novel), ''Impact'' (novel), a 2010 novel by Douglas Preston *''Impact Press'', a former Orlando, Florida-based magazine * Impact Magazines, a former UK magazine publisher * Impact (conservative magazine), ''Impact'' (conservative magazine), a British political magazine * Impact (action entertainment magazine), ''Impact'' (British magazine), a British action film magazine * ''Impact'', a French action film magazine spun off from ''Mad_Movies#Impact, Mad Movies'' * Impact (UNESCO magazine), ''Im ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irrigation Sprinkler
An irrigation sprinkler (also known as a water sprinkler or simply a sprinkler) is a device used to irrigate (water) agricultural crops, lawns, landscapes, golf courses, and other areas. They are also used for cooling and for the control of airborne dust. Sprinkler irrigation is the method of applying water in a controlled manner in way similar to rainfall. The water is distributed through a network that may consist of pumps, valves, pipes, and sprinklers. Irrigation sprinklers can be used for residential, industrial, and agricultural usage. It is useful on uneven land where sufficient water is not available as well as on sandy soil. The perpendicular pipes, having rotating nozzles on top, are joined to the main pipeline at regular intervals. When water is pressurized through the main pipe it escapes from the rotating nozzles. It gets sprinkled on the crop. In sprinkler or overhead irrigation, water is piped to one more central locations within the field and distributed by overh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bearing (mechanical)
A ball bearing A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts. The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts. Most bearings facilitate the desired motion by minimizing friction. Bearings are classified broadly according to the type of operation, the motions allowed, or the directions of the loads (forces) applied to the parts. The term "bearing" is derived from the verb " to bear"; a bearing being a machine element that allows one part to bear (i.e., to support) another. The simplest bearings are bearing surfaces, cut or formed into a part, with varying degrees of control over the form, size, roughness, and location of the surface. Other bearings are separate devices installed into a machine or mach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Screw Thread
A screw thread is a helical structure used to convert between rotational and linear movement or force. A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a ''straight'' thread and the latter called a ''tapered'' thread. A screw thread is the essential feature of the screw as a simple machine and also as a threaded fastener. The mechanical advantage of a screw thread depends on its ''lead'', which is the linear distance the screw travels in one revolution. In most applications, the lead of a screw thread is chosen so that friction is sufficient to prevent linear motion being converted to rotary, that is so the screw does not slip even when linear force is applied, as long as no external rotational force is present. This characteristic is essential to the vast majority of its uses. The tightening of a fastener's screw thread is comparable to driving a wedge into a gap until it sticks fast through friction and slight ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glendora, California
Glendora is a city in the San Gabriel Valley in Los Angeles County, California, east of Los Angeles. As of the 2020 census, the population of Glendora was 52,558. World-famous Route 66 runs through the city. Known as the "Pride of the Foothills", Glendora is nestled in the foothills of the San Gabriel Mountains. Its downtown area, locally known as the Glendora Village, hosts dozens of restaurants, cafes, shops, and boutiques along Glendora Avenue with many community events scheduled throughout the year. Neighborhoods and residences in Glendora reflect the city's history and range from Queen Annes, to Folk Victorians, early 20th-century bungalows, to ranch style homes, to mid-rise multi-family residential complexes, to modern mansions. Glendora's most expensive neighborhoods contain many very large, secluded, estate homes with views across the San Gabriel Valley to Downtown Los Angeles. Glendora is bordered by Azusa and the unincorporated community of Citrus to the wes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rain Bird
Rain Bird Corporation is an international privately held manufacturer and provider of irrigation products and services for landscapes, golf courses, sports fields, and agriculture which are designed to minimize water consumption. The firm is headquartered in Azusa, California, with offices and manufacturing facilities in Tucson, Arizona; Steele, Alabama; Tijuana Mexico; France; and China. Rain Bird sells more than 4,000 products and services in over 130 countries. History Rain Bird had its origins in 1933 when Glendora, California, citrus grower Orton Englehart developed the first prototype of the horizontal action impact sprinkler. This new design offered slow rotation and more efficient watering than other sprinklers of that era, features that were long sought after by local irrigators. Orton's neighbor Clement LaFetra began helping him build and market the sprinklers, and they urged him to patent the invention. was awarded on April 16, 1935. Englehart preferred farming, so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angular Momentum
Angular momentum (sometimes called moment of momentum or rotational momentum) is the rotational analog of Momentum, linear momentum. It is an important physical quantity because it is a Conservation law, conserved quantity – the total angular momentum of a closed system remains constant. Angular momentum has both a direction (geometry), direction and a magnitude, and both are conserved. Bicycle and motorcycle dynamics, Bicycles and motorcycles, flying discs, Rifling, rifled bullets, and gyroscopes owe their useful properties to conservation of angular momentum. Conservation of angular momentum is also why hurricanes form spirals and neutron stars have high rotational rates. In general, conservation limits the possible motion of a system, but it does not uniquely determine it. The three-dimensional angular momentum for a point particle is classically represented as a pseudovector , the cross product of the particle's position vector (relative to some origin) and its mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nozzle
A nozzle is a device designed to control the direction or characteristics of a fluid flow (specially to increase velocity) as it exits (or enters) an enclosed chamber or pipe (material), pipe. A nozzle is often a pipe or tube of varying cross sectional area, and it can be used to direct or modify the flow of a fluid (liquid or gas). Nozzles are frequently used to control the rate of flow, speed, direction, mass, shape, and/or the pressure of the stream that emerges from them. In a nozzle, the velocity of fluid increases at the expense of its pressure energy. Types Jet A gas jet, fluid jet, or hydro jet is a nozzle intended to eject gas or fluid in a coherent stream into a surrounding medium. Gas jets are commonly found in gas stoves, ovens, or barbecues. Gas jets were commonly used for Gas lighting, light before the development of electric light. Other types of fluid jets are found in carburetors, where smooth calibrated orifices are used to regulate the flow of gasoline, fuel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Well
A well is an excavation or structure created on the earth by digging, driving, or drilling to access liquid resources, usually water. The oldest and most common kind of well is a water well, to access groundwater in underground aquifers. The well water is drawn up by a pump, or using containers, such as buckets that are raised mechanically or by hand. Water can also be injected back into the aquifer through the well. Wells were first constructed at least eight thousand years ago and historically vary in construction from a sediment of a dry watercourse to the qanats of Iran, and the stepwells and sakiehs of India. Placing a lining in the well shaft helps create stability, and linings of wood or wickerwork date back at least as far as the Iron Age. Wells have traditionally been sunk by hand digging, as is still the case in rural areas of the developing world. These wells are inexpensive and low-tech as they use mostly manual labour, and the structure can be lined with b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermoplastics
A thermoplastic, or thermosoftening plastic, is any plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling. Most thermoplastics have a high molecular weight. The polymer chains associate by intermolecular forces, which weaken rapidly with increased temperature, yielding a viscous liquid. In this state, thermoplastics may be reshaped, and are typically used to produce parts by various polymer processing techniques such as injection molding, compression molding, calendering, and extrusion. Thermoplastics differ from thermosetting polymers (or "thermosets"), which form irreversible chemical bonds during the curing process. Thermosets do not melt when heated, but typically decompose and do not reform upon cooling. Above its glass transition temperature and below its melting point, the physical properties of a thermoplastic change drastically without an associated phase change. Some thermoplastics do not full ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Furrow Irrigation
Surface irrigation is where water is applied and distributed over the soil surface by gravity. It is by far the most common form of irrigation throughout the world and has been practiced in many areas virtually unchanged for thousands of years. Surface irrigation is often referred to as flood irrigation, implying that the water distribution is uncontrolled and therefore, inherently inefficient. In reality, some of the irrigation practices grouped under this name involve a significant degree of management (for example surge irrigation). Process The process of surface irrigation can be described using four phases. As water is applied to the top end of the field it will flow or advance over the field length. The advance phase refers to that length of time as water is applied to the top end of the field and flows or advances over the field length. After the water reaches the end of the field it will either run-off or start to pond. The period of time between the end of the advance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chapman University
Chapman University is a private research university in Orange, California, United States. Encompassing eleven colleges, the university is classified among "R2: Doctoral Universities – High research activity". The school maintains its founding affiliations with the Christian Church (Disciples of Christ) and the United Church of Christ, but is a secular university. History Founded in Woodland, California, as Hesperian College, the school began classes on March 4, 1861. Its opening was timed to coincide with the hour of Abraham Lincoln's first inauguration. Hesperian admitted students regardless of sex or race. Throughout its first decades, the school was renamed and relocated several times. In 1896, Hesperian merged with Pierce Christian College to form the Berkeley Bible Seminary in Berkeley, California. The college was subsequently moved to San Francisco as the California Bible College. In 1920, the school was acquired by California Christian College, and moved to southe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
