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Hopewell Furnace
Hopewell Furnace National Historic Site in southeastern Berks County, near Elverson, Pennsylvania, is an example of an American 19th century rural iron plantation, whose operations were based around a charcoal-fired cold-blast iron blast furnace. The significant restored structures include the ''furnace group'' (blast furnace, water wheel, blast machinery, cast house and charcoal house), as well as the ironmaster's house, a company store, the blacksmith's shop, a barn and several worker's houses. Hopewell Furnace was founded about 1771 by ironmaster Mark Bird, son of William Bird, who had been one of Pennsylvania's most prominent ironmasters. The site's most prosperous time was during the 1820-1840 period with a brief return to significant production during the American Civil War. In the mid-19th century, changes in iron making, including a shift from charcoal-fueled furnaces to anthracite-fueled steel mills, rendered smaller furnaces like Hopewell obsolete. The site discontin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania
Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, Maryland to its south, West Virginia to its southwest, Ohio to its west, Lake Erie and the Canadian province of Ontario to its northwest, New York to its north, and the Delaware River and New Jersey to its east. Pennsylvania is the fifth-most populous state in the nation with over 13 million residents as of 2020. It is the 33rd-largest state by area and ranks ninth among all states in population density. The southeastern Delaware Valley metropolitan area comprises and surrounds Philadelphia, the state's largest and nation's sixth most populous city. Another 2.37 million reside in Greater Pittsburgh in the southwest, centered around Pittsburgh, the state's second-largest and Western Pennsylvania's largest city. The state's su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Committees Of Correspondence
The committees of correspondence were, prior to the outbreak of the American Revolutionary War, a collection of American political organizations that sought to coordinate opposition to British Parliament and, later, support for American independence. The brainchild of Samuel Adams, a Patriot from Boston, the committees sought to establish, through the writing of letters, an underground network of communication among Patriot leaders in the Thirteen Colonies. The committees were instrumental in setting up the First Continental Congress, which met in Philadelphia. Function The function of the committees was to alert the residents of a given colony of the actions taken by the British Crown, and to disseminate information from cities to the countryside. The news was typically spread via hand-written letters or printed pamphlets, which would be carried by couriers on horseback or aboard ships. The committees were responsible for ensuring that this news accurately reflected the views, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cast Iron
Cast iron is a class of iron–carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its color when fractured: white cast iron has carbide impurities which allow cracks to pass straight through, grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the material breaks, and ductile cast iron has spherical graphite "nodules" which stop the crack from further progressing. Carbon (C), ranging from 1.8 to 4 wt%, and silicon (Si), 1–3 wt%, are the main alloying elements of cast iron. Iron alloys with lower carbon content are known as steel. Cast iron tends to be brittle, except for malleable cast irons. With its relatively low melting point, good fluidity, castability, excellent machinability, resistance to deformation and wear resistance, cast irons have become an engineering material with a wide range of applications and are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pig Iron
Pig iron, also known as crude iron, is an intermediate product of the iron industry in the production of steel which is obtained by smelting iron ore in a blast furnace. Pig iron has a high carbon content, typically 3.8–4.7%, along with silica and other constituents of dross, which makes it brittle and not useful directly as a material except for limited applications. The traditional shape of the molds used for pig iron ingots is a branching structure formed in sand, with many individual ingots at right angles to a central channel or "runner", resembling a litter of piglets being nursed by a sow. When the metal had cooled and hardened, the smaller ingots (the "pigs") were simply broken from the runner (the "sow"), hence the name "pig iron". As pig iron is intended for remelting, the uneven size of the ingots and the inclusion of small amounts of sand cause only insignificant problems considering the ease of casting and handling them. History Smelting and producing wroug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cupola Furnace
A cupola or cupola furnace is a melting device used in foundries that can be used to melt cast iron, Ni-resist iron and some bronzes. The cupola can be made almost any practical size. The size of a cupola is expressed in diameters and can range from . The overall shape is cylindrical and the equipment is arranged vertically, usually supported by four legs. The overall look is similar to a large smokestack. The bottom of the cylinder is fitted with doors which swing down and out to 'drop bottom'. The top where gases escape can be open or fitted with a cap to prevent rain from entering the cupola. To control emissions a cupola may be fitted with a cap that is designed to pull the gases into a device to cool the gases and remove particulate matter. The shell of the cupola, being usually made of steel, has refractory brick and plastic refractory patching material lining it. The bottom is lined in a similar manner but often a clay and sand mixture ("bod") may be used, as this lining ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamping Mill
Stamp or Stamps or Stamping may refer to: Official documents and related impressions * Postage stamp, used to indicate prepayment of fees for public mail * Ration stamp, indicating the right to rationed goods * Revenue stamp, used on documents to indicate payment of tax * Rubber stamp, device used to apply inked markings to objects ** Passport stamp, a rubber stamp inked impression received in one's passport upon entering or exiting a country ** National Park Passport Stamps * Food stamps, tickets used in the United States that indicate the right to benefits in the Supplemental Nutrition Assistance Program Collectibles * Trading stamp, a small paper stamp given to customers by merchants in loyalty programs that predate the modern loyalty card * Eki stamp, a free collectible rubber ink stamp found at many train stations in Japan Places * Stamp Creek, a stream in Georgia * Stamps, Arkansas People * Stamp or Apiwat Ueathavornsuk (born 1982), Thai singer-songwriter * Stamp (surna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overshot
A water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a wheel (usually constructed from wood or metal), with a number of blades or buckets arranged on the outside rim forming the driving car. Water wheels were still in commercial use well into the 20th century but they are no longer in common use. Uses included milling flour in gristmills, grinding wood into pulp for papermaking, hammering wrought iron, machining, ore crushing and pounding fibre for use in the manufacture of cloth. Some water wheels are fed by water from a mill pond, which is formed when a flowing stream is dammed. A channel for the water flowing to or from a water wheel is called a mill race. The race bringing water from the mill pond to the water wheel is a headrace; the one carrying water after it has left the wheel is commonly referred to as a tailrace. Waterwheels were used for various purposes from a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mill Race
A mill race, millrace or millrun, mill lade (Scotland) or mill leat (Southwest England) is the current of water that turns a water wheel, or the channel ( sluice) conducting water to or from a water wheel. Compared with the broad waters of a mill pond, the narrow current is swift and powerful. The race leading to the water wheel on a wide stream or mill pond is called the head race (or headraceDictionary.com, word definition), and the race leading away from the wheel is called the tail raceChamber's Twentieth Century Dictionary, 1968, p=674 (or tailrace). A mill race has many geographically specific names, such as ''leat, lade, flume, goit, penstock''. These words all have more precise definitions and meanings will differ elsewhere. The original undershot waterwheel, described by Vitruvius, was a 'run of the river wheel' placed so a fast flowing stream would press against and turn the bottom of a bucketed wheel. In the first meaning of the term, the millrace was the stream; in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charcoal Burner
A charcoal burner is someone whose occupation is to manufacture charcoal. Traditionally this is achieved by carbonising wood in a charcoal pile or kiln. Charcoal burning is one of the oldest human crafts. The knowledge gained from this industry still contributes to the solution of energy problems today. Due to its historical and cultural importance, charcoal burning and tar distilling were incorporated in December 2014 into the register of the Intangible Cultural Heritage in Germany by the ''Kultusministerkonferenz''. History and technique Medieval charcoal burners Since the Iron Age, high temperatures have had to be produced for iron smelting, for glassmaking, and for the working of precious metals. Charcoal has been used to do this for centuries and, in order to produce it, entire forests were felled. With the increasing use of stone coal from the 18th century, the charcoal burning industry declined. Even in ancient times, charcoal was manufactured in kilns. Logs were ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birdsboro Steel
Birdsboro Steel (officially known as Birdsboro Iron Foundry Co, E&G Brooke Iron Co, Birdsboro Steel Foundry and Machine Co, and finally Birdsboro Corp) was an American producer of steel, machines, and machine parts based in Birdsboro, Pennsylvania. The company also produced munitions, tanks, and artillery in the late 1940s through their subsidiary company, Armorcast. Though the company wasn't officially established until around 1867, the roots of the company go as far back as 1740 History The Birds The roots of the company go as far back as 1740, when William Bird, whom had worked as an apprentice at Colebrookdale Furnace near Boyertown, bought land along the Hay Creek and Schuylkill River. On this land he erected his first forges: the Birdsborough Forge (where modern Birdsboro stands), and the New Pine Forges. Bird also built the Berkshire Furnace (also known as the Roxborough Furnace) near modern Wernersville as well as a few other forges along the Hay and Six Penny Cree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continental Navy
The Continental Navy was the navy of the United States during the American Revolutionary War and was founded October 13, 1775. The fleet cumulatively became relatively substantial through the efforts of the Continental Navy's patron John Adams and vigorous Congressional support in the face of stiff opposition, when considering the limitations imposed upon the Patriot supply pool. The main goal of the navy was to intercept shipments of British matériel and generally disrupt British maritime commercial operations. The initial fleet consisted of converted merchantmen because of the lack of funding, manpower, and resources, with exclusively designed warships being built later in the conflict. The vessels that successfully made it to sea met with success only rarely, and the effort contributed little to the overall outcome of the war. The fleet did serve to highlight a few examples of Continental resolve, notably launching Captain John Barry into the limelight. It provided neede ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continental Army
The Continental Army was the army of the United Colonies (the Thirteen Colonies) in the Revolutionary-era United States. It was formed by the Second Continental Congress after the outbreak of the American Revolutionary War, and was established by a resolution of Congress on June 14, 1775. The Continental Army was created to coordinate military efforts of the Colonies in their war for independence against the British, who sought to keep their American lands under control. General George Washington was the commander-in-chief of the army throughout the war. The Continental Army was supplemented by local militias and volunteer troops that were either loyal to individual states or otherwise independent. Most of the Continental Army was disbanded in 1783 after the Treaty of Paris formally ended the fighting. The 1st and 2nd Regiments of the Army went on to form what was to become the Legion of the United States in 1792. This became the foundation of what is now the United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
