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Union Iron Works
Union Iron Works, located in San Francisco, California, on the southeast waterfront, was a central business within the large industrial zone of Potrero Point, for four decades at the end of the nineteenth and beginning of the twentieth centuries. History Peter Donohue, an Irish immigrant, founded Union Brass & Iron Works in the south of Market area of San Francisco in 1849. It was later run by his son, James Donohue. After years as the premiere producer of mining, railroad, agricultural and locomotive machinery in California, Union Iron Works, led by I. M. Scott, entered the ship building business and relocated to Potrero Point where its shipyards still exist, making the site on the north side of the Potrero the longest running privately owned shipyard in the United States. After Bethlehem Shipbuilding Corporation bought the works in 1905, the consolidated company came to include the Alameda Works Shipyard, located across the San Francisco Bay in Alameda and the Hunter's Poin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerial View Of The Union Iron Works, San Francisco, California (USA), Circa In 1918 (NH 42535)
Aerial may refer to: Music * ''Aerial'' (album), by Kate Bush * ''Aerials'' (song), from the album ''Toxicity'' by System of a Down Bands * Aerial (Canadian band) *Aerial (Scottish band) *Aerial (Swedish band) Performance art *Aerial silk, apparatus used in aerial acrobatics * Aerialist, an acrobat who performs in the air Recreation and sport *Aerial (dance move) * Aerial (skateboarding) *Aerial adventure park, ropes course with a recreational purpose * Aerial cartwheel (or side aerial), gymnastics move performed in acro dance and various martial arts *Aerial skiing, discipline of freestyle skiing * Front aerial, gymnastics move performed in acro dance Technology Antennas * Aerial (radio), a radio ''antenna'' or transducer that transmits or receives electromagnetic waves ** Aerial (television), an over-the-air television reception antenna Mechanical * Aerial fire apparatus, for firefighting and rescue * Aerial work platform, for positioning workers Optical * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Pacific Railroad
The Central Pacific Railroad (CPRR) was a rail company chartered by U.S. Congress in 1862 to build a railroad eastwards from Sacramento, California, to complete the western part of the "First transcontinental railroad" in North America. Incorporated in 1861, CPRR ceased operation in 1885 when it was acquired by Southern Pacific Railroad as a leased line. Following the completion of the Pacific Railroad Surveys in 1855, several national proposals to build a transcontinental railroad failed because of the energy consumed by political disputes over slavery. With the secession of the South in 1861, the modernizers in the Republican Party controlled the US Congress. They passed legislation in 1862 authorizing the central rail route with financing in the form of land grants and government railroad bond, which were all eventually repaid with interest. The government and the railroads both shared in the increased value of the land grants, which the railroads developed. The constructio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco And San Jose Railroad
The San Francisco and San Jose Railroad (SF&SJ) was a railroad which linked the communities of San Francisco and San Jose, California, running the length of the San Francisco Peninsula. The company incorporated in 1860 and was one of the first railroads to employ Chinese laborers in its construction. It opened the first portion of its route in 1863, completing the entire route in 1864. The company was consolidated with the Southern Pacific Railroad in 1870. Today, Caltrain and the Union Pacific Railroad continue to operate trains over the company's original route. History A railroad between San Francisco and San Jose was planned as early as 1849–50, leading to the creation of The Pacific and Atlantic Railroad Company (P&A) on September 6, 1851. The route was surveyed and published by the end of 1851, but the P&A was unable to raise funds locally; when the P&A turned to banking houses in New York and England, they were told that no funds could be disbursed without first obtainin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
12-1-2-Beth-SFran-25
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
12-1-4b-ua229 Beth-16thSt-SFran-SubRepair-25
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gas Engine
A gas engine is an internal combustion engine that runs on a gaseous fuel, such as coal gas, producer gas, biogas, landfill gas or natural gas. In the United Kingdom, the term is unambiguous. In the United States, due to the widespread use of "gas" as an abbreviation for gasoline (petrol), such an engine might also be called a gaseous-fueled engine or natural gas engine or spark ignited. Generally in modern usage, the term ''gas engine'' refers to a heavy-duty industrial engine capable of running continuously at full load for periods approaching a high fraction of 8,760 hours per year, unlike a gasoline automobile engine, which is lightweight, high-revving and typically runs for no more than 4,000 hours in its entire life. Typical power ranges from to . History Lenoir There were many experiments with gas engines in the 19th century, but the first practical gas-fuelled internal combustion engine was built by the Belgian engineer Étienne Lenoir in 1860. However, the L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam Engine
A steam engine is a heat engine that performs mechanical work using steam as its working fluid. The steam engine uses the force produced by steam pressure to push a piston back and forth inside a cylinder. This pushing force can be transformed, by a connecting rod and crank, into rotational force for work. The term "steam engine" is generally applied only to reciprocating engines as just described, not to the steam turbine. Steam engines are external combustion engines, where the working fluid is separated from the combustion products. The ideal thermodynamic cycle used to analyze this process is called the Rankine cycle. In general usage, the term ''steam engine'' can refer to either complete steam plants (including boilers etc.), such as railway steam locomotives and portable engines, or may refer to the piston or turbine machinery alone, as in the beam engine and stationary steam engine. Although steam-driven devices were known as early as the aeo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boiler
A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler-based power generation, cooking, and sanitation. Heat sources In a fossil fuel power plant using a steam cycle for power generation, the primary heat source will be combustion of coal, oil, or natural gas. In some cases byproduct fuel such as the carbon monoxide rich offgasses of a coke battery can be burned to heat a boiler; biofuels such as bagasse, where economically available, can also be used. In a nuclear power plant, boilers called steam generators are heated by the heat produced by nuclear fission. Where a large volume of hot gas is available from some process, a heat recovery steam generator or recovery boiler can use the heat to produce steam, with little or no extra fuel consumed; such a configuration i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States R-class Submarine
The R-class submarines were a class of United States Navy submarines active from 1918 until 1945. With the first of the class laid down following the American entry into World War I, they were built rapidly. Although ''R-15'' through ''R-20'' were completed July–October 1918, they did not serve overseas, and the bulk of the class were not completed until after the Armistice. Design ;Group 1: The ''R-1'' through ''R-20'' boats, designed by Electric Boat and built by Fore River Shipyard and Union Iron Works, were known as the ''R-1''-class submarines. These single-hull boats were structurally very similar to the preceding ''O'' class, but larger and therefore with more powerful machinery to maintain the required speed. For the first time in a US submarine class, 21 inch (533 mm) torpedo tubes were fitted, a tube diameter that is still standard worldwide. A more powerful fixed 3-inch (76 mm)/50 caliber deck gun replaced the retractable 3-inch/23 caliber gun found on previous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wickes-class Destroyer
The ''Wickes''-class destroyers were a class of 111 destroyers built by the United States Navy in 1917–19. Along with the 6 preceding and 156 subsequent s, they formed the "flush-deck" or "four-stack" type. Only a few were completed in time to serve in World War I, including , the lead ship of the class. While some were scrapped in the 1930s, the rest served through World War II. Most of these were converted to other uses; nearly all in U.S. service had half their boilers and one or more stacks removed to increase fuel and range or accommodate troops. Others were transferred to the British Royal Navy and the Royal Canadian Navy, some of which were later transferred to the Soviet Navy. All were scrapped within a few years after World War II. Background The destroyer type was at this time a relatively new class of fighting ship for the U.S. Navy. The type arose in response to torpedo boats that had been developing from 1865, especially after the development of the self-prop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Locomotive
A locomotive or engine is a rail transport vehicle that provides the motive power for a train. If a locomotive is capable of carrying a payload, it is usually rather referred to as a multiple unit, motor coach, railcar or power car; the use of these self-propelled vehicles is increasingly common for passenger trains, but rare for freight (see CargoSprinter). Traditionally, locomotives pulled trains from the front. However, push-pull operation has become common, where the train may have a locomotive (or locomotives) at the front, at the rear, or at each end. Most recently railroads have begun adopting DPU or distributed power. The front may have one or two locomotives followed by a mid-train locomotive that is controlled remotely from the lead unit. __TOC__ Etymology The word ''locomotive'' originates from the Latin 'from a place', ablative of 'place', and the Medieval Latin 'causing motion', and is a shortened form of the term ''locomotive engine'', which was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
