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Beach Pneumatic Transit
The Beach Pneumatic Transit was the first attempt to build an underground public transit system in New York City. It was developed by Alfred Ely Beach in 1869 as a demonstration subway line running on pneumatic power. The subway line had one stop in the basement of the Rogers Peet Building and a one-car shuttle going back and forth . It was not a regular mode of transportation, and lasted from 1870 until 1873. History Alfred Ely Beach demonstrated a model of basic pneumatic subway system, in which air pressure in the tube pushed the cars, at the American Institute Exhibition in New York in 1867. After demonstrating that the model was viable, in 1869 Beach and his Beach Pneumatic Transit Company began constructing a pneumatically powered subway line beneath Broadway. Funneled through a company he set up, Beach put up $350,000 of his own money to pay for the full-scale test project. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Ely Beach
Alfred Ely Beach (September 1, 1826 – January 1, 1896) was an American inventor, publisher, and patent lawyer, born in Springfield, Massachusetts. He is most known for his design of New York City's earliest subway predecessor, the Beach Pneumatic Transit. A member of the Union League of New York, he also patented a typewriter for the blind and a system for heating water with solar power. Early years Beach was born in Springfield, Massachusetts, and was the son of a prominent publisher, Moses Yale Beach. Alfred Beach worked for his father until he and a friend, Orson Desaix Munn, decided to buy ''Scientific American'', a relatively new publication. He also brought in the venture Salem Howe Wales, President of the New York City Department of Docks and co-founder of the Metropolitan Museum of Art. They ran ''Scientific American'' until their deaths decades later, and it was carried on by their sons and grandsons for decades more. Munn and Beach also established a very succes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmospheric Railway
An atmospheric railway uses differential air pressure to provide power for propulsion of a railway vehicle. A static power source can transmit motive power to the vehicle in this way, avoiding the necessity of carrying mobile power generating equipment. The air pressure, or partial vacuum (i.e., negative relative pressure) can be conveyed to the vehicle in a continuous pipe, where the vehicle carries a piston running in the tube. Some form of re-sealable slot is required to enable the piston to be attached to the vehicle. Alternatively the entire vehicle may act as the piston in a large tube or be coupled electromagnetically to the piston. Several variants of the principle were proposed in the early 19th century, and a number of practical forms were implemented, but all were overcome by unforeseen disadvantages and discontinued within a few years. A modern proprietary system has been developed and is in use for short-distance applications. Porto Alegre Metro airport connection ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panic Of 1873
The Panic of 1873 was a financial crisis that triggered an economic depression in Europe and North America that lasted from 1873 to 1877 or 1879 in France and in Britain. In Britain, the Panic started two decades of stagnation known as the "Long Depression" that weakened the country's economic leadership. In the United States, the Panic was known as the "Great Depression" until the events of 1929 and the early 1930s set a new standard. The Panic of 1873 and the subsequent depression had several underlying causes for which economic historians debate the relative importance. American inflation, rampant speculative investments (overwhelmingly in railroads), the demonetization of silver in Germany and the United States, ripples from economic dislocation in Europe resulting from the Franco-Prussian War (1870–1871), and major property losses in the Great Chicago Fire (1871) and the Great Boston Fire (1872) helped to place massive strain on bank reserves, which, in New York City ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crystal Palace Pneumatic Railway
The Crystal Palace Pneumatic Railway was an experimental atmospheric railway that ran in Crystal Palace Park in south London in 1864. History The railway was designed by Thomas Webster Rammell, who had previously built a pneumatic railway for the London Pneumatic Despatch Company to convey letters along tunnels in large vacuum-driven wagons. A similar principle was applied to this railway, where a carriage fitted with a large collar of bristles was sucked along an airtight tunnel that measured .Hadfield, C. (1967) ''Atmospheric Railways: A Victorian Venture in Silent Speed'' Newton Abbot: David & Charles The bristle collar served to keep the tunnel "partially airtight". It operated for just over two months, and may have been a demonstration line for a more substantial atmospheric railway planned between Waterloo and Whitehall, construction of which was started under the Thames but never completed. The tunnel was built in a shallow trench of in depth; the contemporary illustr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baffle (heat Transfer)
Baffles are flow-directing or obstructing vanes or panels used to direct a flow of liquid or gas. It is used in some household stoves and in some industrial process vessels (tanks), such as shell and tube heat exchangers, chemical reactors, and static mixers. Baffles are an integral part of the shell and tube heat exchanger design. A baffle is designed to support tube bundles and direct the flow of fluids for maximum efficiency. Baffle design and tolerances for heat exchangers are discussed in the standards of the Tubular Exchanger Manufacturers Association (TEMA). Use of baffles The main roles of a baffle in a shell and tube heat exchanger are to: * Hold tubes in position (preventing sagging), both in production and operation * Prevent the effects of steam starvation, which is increased with both fluid velocity and the length of the exchanger * Direct shell-side fluid flow along tube field. This increases fluid velocity and the effective heat transfer co-efficient of the e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roots Blower Company
The Roots Blower Company was an American engineering company based in Connersville, Indiana. It was founded in 1859 by the inventors Philander Higley Roots and Francis Marion Roots. It is notable for the Roots blower, a type of pump.INDIANA ONE HUNDRED AND FIFTY YEARS OF AMERICAN DEVELOPMENT Vol. 3, By Charles Roll, The Lewis Publishing Company, 1931 Retrieved 1 April 2012. Today, Roots blowers are mainly used as s in superchargers for |
Roots Blower
The Roots-type blower is a positive displacement lobe pump which operates by pumping a fluid with a pair of meshing lobes resembling a set of stretched gears. Fluid is trapped in pockets surrounding the lobes and carried from the intake side to the exhaust. The most common application of the Roots-type blower has been the induction device on two-stroke diesel engines, such as those produced by Detroit Diesel and Electro-Motive Diesel. Roots-type blowers are also used to supercharge four-stroke Otto cycle engines, with the blower being driven from the engine's crankshaft via a toothed or V-belt, a roller chain or a gear train. The Roots-type blower is named after American inventors and brothers Philander and Francis Marion Roots, founders of the Roots Blower Company of Connersville, Indiana USA, who patented the basic design in 1860 as an air pump for use in blast furnaces and other industrial applications. In 1900, Gottlieb Daimler included a Roots-style blower in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Postal Service
The United States Postal Service (USPS), also known as the Post Office, U.S. Mail, or Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the U.S., including its insular areas and associated states. It is one of the few government agencies explicitly authorized by the U.S. Constitution. The USPS, as of 2021, has 516,636 career employees and 136,531 non-career employees. The USPS traces its roots to 1775 during the Second Continental Congress, when Benjamin Franklin was appointed the first postmaster general; he also served a similar position for the colonies of the Kingdom of Great Britain. The Post Office Department was created in 1792 with the passage of the Postal Service Act. It was elevated to a cabinet-level department in 1872, and was transformed by the Postal Reorganization Act of 1970 into the U.S. Postal Service as an independent agency. Since the early 1980s, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zirconia Lamps
A zirconia light is an intensely brilliant chemical light produced by incandescent zirconia. It is similar in design to the Drummond light (limelight), but uses a block of zirconia instead of quicklime. Both have been replaced by the electric light An electric light, lamp, or light bulb is an electrical component that produces light. It is the most common form of artificial lighting. Lamps usually have a base made of ceramic, metal, glass, or plastic, which secures the lamp in the soc .... Source * Types of lamp Zirconium References *no author listed (1870"New Zirconia Light" The Pharmaceutical Journal and Transactions. 29:81-82 {{tech-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frescoes
Fresco (plural ''frescos'' or ''frescoes'') is a technique of mural painting executed upon freshly laid ("wet") lime plaster. Water is used as the vehicle for the dry-powder pigment to merge with the plaster, and with the setting of the plaster, the painting becomes an integral part of the wall. The word ''fresco'' ( it, affresco) is derived from the Italian adjective ''fresco'' meaning "fresh", and may thus be contrasted with fresco-secco or secco mural painting techniques, which are applied to dried plaster, to supplement painting in fresco. The fresco technique has been employed since antiquity and is closely associated with Italian Renaissance painting. The word ''fresco'' is commonly and inaccurately used in English to refer to any wall painting regardless of the plaster technology or binding medium. This, in part, contributes to a misconception that the most geographically and temporally common wall painting technology was the painting into wet lime plaster. Even in appar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York Pneumatic Tube Mail
The pneumatic tube mail was a postal system operating in New York City from 1897 to 1953 using pneumatic tubes. Similar systems had arisen in the mid-19th century in London, via the London Pneumatic Despatch Company; in Manchester and other British cities; and in Paris via the Paris pneumatic post. Following the creation of the first American pneumatic mail system in Philadelphia in 1893, New York City's system was begun, initially only between the old General Post Office on Park Row and the Produce Exchange on Bowling Green, a distance of . Eventually the network stretched up both sides of Manhattan Island all the way to Manhattanville on the West side and "Triborough" in East Harlem, forming a loop running a few feet below street level. Travel time from the General Post Office to Harlem was 20 minutes. A crosstown line connected the two parallel lines between the new General Post office on the West Side and Grand Central Terminal on the east, and took four minutes for mail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New-York Historical Society
The New-York Historical Society is an American history museum and library in New York City, along Central Park West between 76th and 77th Streets, on the Upper West Side of Manhattan. The society was founded in 1804 as New York's first museum. It presents exhibitions, public programs, and research that explore the history of New York and the nation. The New-York Historical Society Museum & Library has been at its present location since 1908. The granite building was designed by York & Sawyer in a classic Roman Eclectic style. The building is a designated New York City landmark. A renovation, completed in November 2011, made the building more accessible to the public, provided space for an interactive children's museum, and facilitated access to its collections. Louise Mirrer has been the president of the Historical Society since 2004. She was previously Executive Vice Chancellor for Academic Affairs of the City University of New York. Beginning in 2005, the museum presented a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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