|
R. G. LeTourneau
Robert Gilmour "R. G." LeTourneau (; November 30, 1888 – June 1, 1969), born in Richford, Vermont, was a prolific inventor of technologies related to earthmoving machinery, and founder of LeTourneau Technologies and LeTourneau University. His factories supplied machinery which represented nearly 75 percent of the earthmoving equipment used by the Allied forces during World War II, and more than half of the Alaska Highway in Canada, "Alcan", was built using LeTourneau equipment. Over the course of his life he secured 299 patents, relating to earthmoving equipment, manufacturing processes, and machine tools. LeTourneau sold most company assets in 1953 for US$ 31M, but reentered the heavy equipment field as LeTourneau Technologies, the oversight of which was left to his son, Richard LeTourneau, on his retirement in 1966. Its manufacturing and offshore drilling assets were sold in 1970 to Marathon Manufacturing Co., to become Marathon LeTourneau Co. (the assets of which became ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richford, Vermont
Richford is a town in Franklin County, Vermont, United States, located along the Canada–United States border. The population was 2,346 at the 2020 census. Richford is the birthplace of R. G. LeTourneau, an industrialist who founded LeTourneau University in Longview, Texas. Richford is the eastern terminus of the Missisquoi Valley Rail-Trail. Geography Richford is located in the northeast corner of Franklin County, bordered to the north by the Brome-Missisquoi Regional County Municipality in the Montérégie region of Quebec in Canada. Orleans County, Vermont, is to the east. Richford, the primary community, is in the northwest part of the town along the Missisquoi River. Vermont Route 105 passes through the center of town, leading east across the Green Mountains to North Troy and southwest to Enosburg Falls. Vermont Route 139 leads north from the center of Richford to the international border. According to the United States Census Bureau, the town has a total area of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apprentice
Apprenticeship is a system for training a potential new practitioners of a Tradesman, trade or profession with on-the-job training and often some accompanying study. Apprenticeships may also enable practitioners to gain a license to practice in a regulated occupation. Most of their training is done while working for an employer who helps the apprentices learn their trade or profession, in exchange for their continued labor for an agreed period after they have achieved measurable competencies. Apprenticeship lengths vary significantly across sectors, professions, roles and cultures. In some cases, people who successfully complete an apprenticeship can reach the "journeyman" or professional certification level of competence. In other cases, they can be offered a permanent job at the company that provided the placement. Although the formal boundaries and terminology of the apprentice/journeyman/master system often do not extend outside guilds and trade unions, the concept of on-the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthmoving Equipment
Heavy equipment, heavy machinery, earthmovers, construction vehicles, or construction equipment, refers to heavy-duty vehicles specially designed to execute construction tasks, most frequently involving earthwork operations or other large construction tasks. ''Heavy equipment'' usually comprises five equipment systems: the implement, traction, structure, power train, and control/information. Heavy equipment has been used since at least the 1st century BC, when the ancient Roman engineer Vitruvius described a crane powered by human or animal labor in ''De architectura''. Heavy equipment functions through the mechanical advantage of a simple machine that multiplies the ratio between input force applied and force exerted, easing and speeding tasks which often could otherwise take hundreds of people and many weeks' labor. Some such equipment uses hydraulic drives as a primary source of motion. The word plant, in this context, has come to mean any type of industrial equipme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regrading
Grading in civil engineering and landscape architectural construction is the work of ensuring a level base, or one with a specified slope, for a construction work such as a foundation, the base course for a road or a railway, or landscape and garden improvements, or surface drainage. The earthworks created for such a purpose are often called the sub-grade or finished contouring (see diagram). Regrading Regrading is the process of grading for raising and/or lowering the levels of land. Such a project can also be referred to as a regrade. Regrading may be done on a small scale (as in preparation of a house site)Trees and Home Construction: Minimizing the impact of construction activity on trees University of Ohio Extension Bulletin 870-99. Accessed online 16 October ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holt Manufacturing Company
The Holt Manufacturing Company began with the 1883 founding of Stockton Wheel Service in Stockton, California, United States. Benjamin Holt, later credited with patenting the first workable crawler ("caterpillar") tractor design, incorporated the Holt Manufacturing Company in 1892. Holt Manufacturing Company was the first company to successfully manufacture a continuous track tractor ( Hornsby in England manufactured at least two full length "track steer" machines, and their patent was later purchased by Holt in 1913, allowing Holt to claim to be the "inventor" of the crawler tractor.) By the early 20th century, Holt Manufacturing Company was the leading manufacturer of combine harvesters in the US, and the leading California-based manufacturer of steam traction engines. Holt Manufacturing Company operated from Stockton, California, until opening a satellite facility in Walla Walla, Washington, to serve the Pacific Northwest. In 1909 Holt Manufacturing Company expanded by p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mare Island Naval Shipyard
The Mare Island Naval Shipyard (MINSY or MINS) was the first United States Navy base established on the Pacific Ocean and was in service 142 years from 1854 to 1996. It is located on Mare Island, northeast of San Francisco, in Vallejo, California. MINSY made a name for itself as the premier U.S. West Coast submarine port as well as serving as the controlling force in San Francisco Bay Area shipbuilding efforts during World War II. The naval base was closed on 31 March 1996, with more than 7,500 civilians on its payroll, and has gone through several redevelopment phases. It was registered as a California Historical Landmark in 1960, and parts of it were declared a National Historic Landmark District in 1975. Beginnings In September 1849, Lieutenant Commander William Pope McArthur was placed in command of the US survey schooner ''Ewing'', which had been brought around Cape Horn to the West Coast by Lieutenant Washington Allon Bartlett. Upon reaching San Francisco, ''Ewing'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War I
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting took place mainly in European theatre of World War I, Europe and the Middle Eastern theatre of World War I, Middle East, as well as in parts of African theatre of World War I, Africa and the Asian and Pacific theatre of World War I, Asia-Pacific, and in Europe was characterised by trench warfare; the widespread use of Artillery of World War I, artillery, machine guns, and Chemical weapons in World War I, chemical weapons (gas); and the introductions of Tanks in World War I, tanks and Aviation in World War I, aircraft. World War I was one of the List of wars by death toll, deadliest conflicts in history, resulting in an estimated World War I casualties, 10 million military dead and more than 20 million wounded, plus some 10 million civilian de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanics
Mechanics () is the area of physics concerned with the relationships between force, matter, and motion among Physical object, physical objects. Forces applied to objects may result in Displacement (vector), displacements, which are changes of an object's position relative to its environment. Theoretical expositions of this branch of physics has its origins in Ancient Greece, for instance, in the writings of Aristotle and Archimedes (see History of classical mechanics and Timeline of classical mechanics). During the early modern period, scientists such as Galileo Galilei, Johannes Kepler, Christiaan Huygens, and Isaac Newton laid the foundation for what is now known as classical mechanics. As a branch of classical physics, mechanics deals with bodies that are either at rest or are moving with velocities significantly less than the speed of light. It can also be defined as the physical science that deals with the motion of and forces on bodies not in the quantum realm. History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vehicle
A vehicle () is a machine designed for self-propulsion, usually to transport people, cargo, or both. The term "vehicle" typically refers to land vehicles such as human-powered land vehicle, human-powered vehicles (e.g. bicycles, tricycles, velomobiles), animal-powered transports (e.g. horse-drawn vehicle, horse-drawn carriages/wagons, ox carts, dog sleds), motor vehicles (e.g. motorcycles, cars, trucks, buses, mobility scooters) and rail transport, railed vehicles (trains, trams and monorails), but more broadly also includes cable transport (aerial lift, cable cars and elevators), watercraft (ships, boats and underwater vehicles), amphibious vehicles (e.g. screw-propelled vehicles, hovercraft, seaplanes), aircraft (airplanes, helicopters, glider (aircraft), gliders and aerostats) and space vehicles (spacecraft, spaceplanes and launch vehicles). This article primarily concerns the more ubiquitous land vehicles, which can be broadly classified by the type of contact interface with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Welding
Welding is a fabrication (metal), fabrication process that joins materials, usually metals or thermoplastics, primarily by using high temperature to melting, melt the parts together and allow them to cool, causing Fusion welding, fusion. Common alternative methods include solvent welding (of thermoplastics) using chemicals to melt materials being bonded without heat, and #Solid-state welding, solid-state welding processes which bond without melting, such as pressure, cold welding, and diffusion bonding. Metal welding is distinct from lower temperature bonding techniques such as brazing and soldering, which do not melt the base metal (parent metal) and instead require flowing a filler metal to solidify their bonds. In addition to melting the base metal in welding, a filler material is typically added to the joint to form a pool of molten material (the weld pool) that cools to form a joint that can be stronger than the base material. Welding also requires a form of shield to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco
San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of 2024, San Francisco is the List of California cities by population, fourth-most populous city in the U.S. state of California and the List of United States cities by population, 17th-most populous in the United States. San Francisco has a land area of at the upper end of the San Francisco Peninsula and is the County statistics of the United States, fifth-most densely populated U.S. county. Among U.S. cities proper with over 250,000 residents, San Francisco is ranked first by per capita income and sixth by aggregate income as of 2023. San Francisco anchors the Metropolitan statistical area#United States, 13th-most populous metropolitan statistical area in the U.S., with almost 4.6 million residents in 2023. The larger San Francisco Bay Area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
