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Perkin-Elmer
PerkinElmer, Inc., previously styled Perkin-Elmer, is an American global corporation focused in the business areas of diagnostics, life science research, food, environmental and industrial testing. Its capabilities include detection, imaging, informatics, and service. PerkinElmer produces analytical instruments, genetic testing and diagnostic tools, medical imaging components, software, instruments, and consumables for multiple end markets. PerkinElmer is part of the S&P 500 Index and operates in 190 countries. History Founding Richard Perkin was attending the Pratt Institute in Brooklyn to study chemical engineering, but left after a year to try his hand on Wall Street. Still interested in the sciences, he gave public lectures on various topics. Charles Elmer ran a firm that supplied court reporters and was nearing retirement when he attended one of Perkin's lectures on astronomy being held at the Brooklyn Institute of Arts and Sciences. The two struck up a friendship over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Scott Perkin
Richard Scott Perkin (1906 – 1969) was an American entrepreneur. At an early age he developed an interest in astronomy, and began making telescopes and grinding lenses and mirrors. He only spent a year in college studying chemical engineering before he began working at a brokerage firm on Wall Street. During the 1930s he met Charles Elmer when the latter was presenting a lecture. The two had a mutual interest in astronomy and decided to go into business together. In 1937, they founded Perkin-Elmer as an optical design and consulting company. Richard served as president of the company until 1960, then became chairman of the board. The crater Perkin on the Moon was named after him, while Elmer was named after his business partner. Perkin was married to Gladys Frelinghuysen Talmage who became CEO after he died. A decade later, Gladys commissioned a commemorative history to be written. One hundred copies were printed and distributed to friends. Further reading * Fahy, Thoma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Wesley Elmer
Charles Wesley Elmer (1872–1954) was an American amateur astronomer and court reporter who co-founded the Perkin-Elmer optical company in 1937. He was born in New York City, and for most of his life he was employed as a court reporter. However, as a hobby he developed a strong interest in astronomy and optical telescopes. In 1936 he met Richard S. Perkin, and the two decided to form an optical business in New York. This would grow to become the Perkin-Elmer optical company, which was officially incorporated on April 19, 1937. Charles Elmer served as the secretary-treasurer of the Perkin-Elmer company until he retired in 1949. He was married to May Custer, the grand niece of General George Armstrong Custer. In 1937 he was awarded the Merit Award by the American Association of Variable Star Observers for his "long continued service and devotion to the activities of the Association". The crater Elmer on the Moon The Moon is Earth's only natural satellite. It is the fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
S&P 500
The Standard and Poor's 500, or simply the S&P 500, is a stock market index tracking the stock performance of 500 large companies listed on stock exchanges in the United States. It is one of the most commonly followed equity indices. As of December 31, 2020, more than $5.4 trillion was invested in assets tied to the performance of the index. The S&P 500 index is a free-float weighted/ capitalization-weighted index. As of August 31, 2022, the nine largest companies on the list of S&P 500 companies accounted for 27.8% of the market capitalization of the index and were, in order of highest to lowest weighting: Apple, Microsoft, Alphabet (including both class A & C shares), Amazon.com, Tesla, Berkshire Hathaway, UnitedHealth Group, Johnson & Johnson and ExxonMobil. The components that have increased their dividends in 25 consecutive years are known as the S&P 500 Dividend Aristocrats. The index is one of the factors in computation of the Conference Board Leading Economic I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glenbrook (Stamford)
Glenbrook is a neighborhood of the city of Stamford, Connecticut. Spanning an area of about , about 15,400 people live in Glenbrook as of 2007. Glenbrook is located on the eastern side of the city, east of Downtown, north of the East Side and the Cove sections and south of the Springdale section. To the west is Downtown Stamford and to the northwest is Belltown. To the east is Darien. Glenbrook is a middle class section of town, and single-family homes are prominent, making up 65% of Glenbrook's housing stock according to a 2007 ''New York Times'' article, although condos and co-ops make up about another 25%. The neighborhood's residential architecture prominently features a number of late 19th century and early 20th century architectural styles, such as Greek revival, Craftsman, Colonial Revival, Queen Anne style, Cape Cod, Victorians, and ranches. Some public housing developments are in the southern end of the neighborhood. There are several retail sections, including the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sylvania Electric Products
Sylvania Electric Products Inc. was an American manufacturer of diverse electrical equipment, including at various times radio transceivers, vacuum tubes, semiconductors, and mainframe computers such as MOBIDIC. They were one of the companies involved in the development of the COBOL programming language. History The ''Hygrade Sylvania Corporation'' was formed when '' NILCO'', ''Sylvania'' and '' Hygrade Lamp Company'' merged into one company in 1931. In 1939, Hygrade Sylvania started preliminary research on fluorescent technology, and later that year, demonstrated the first linear, or tubular, fluorescent lamp. It was featured at the 1939 New York World's Fair. Sylvania was also a manufacturer of both vacuum tubes and transistors. In 1942, the company changed its name to Sylvania Electric Products Inc. During World War II, Sylvania was chosen from among several competing companies to manufacture the miniature vacuum tubes used in proximity fuze shells due to its quality ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argus (camera Company)
Argus was an American maker of cameras and photographic products, founded in 1936 in Ann Arbor, Michigan. Argus originated as a subsidiary of the International Radio Corporation (IRC), founded by Charles Verschoor. Its best-known product was the C3 rangefinder camera, which enjoyed a 27-year production run and became one of the top-selling cameras in history. The company's Model A was the first low-cost 35 mm camera in the United States. Sylvania acquired Argus in 1959 and sold it in 1969, by which time it had ceased camera production (some rebadged cameras continued to be sold under the Argus name through the 1970s). More recently, the Argus brand has been reestablished and is used on a variety of inexpensive digital cameras made by Argus Camera Company, LLC., located in Inverness, Illinois. Models A series *A (1936–1941) *AF (1937–1938) *B (1937) *A2B (1939–1950) *A2F (1939–1941) *AA (1940–1942) *FA (1950–1951) C series *C (1938–1939) *C2 (1938–1942) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York Stock Exchange
The New York Stock Exchange (NYSE, nicknamed "The Big Board") is an American stock exchange in the Financial District of Lower Manhattan in New York City. It is by far the world's largest stock exchange by market capitalization of its listed companies at US$30.1 trillion as of February 2018. The average daily trading value was approximately 169 billion in 2013. The NYSE trading floor is at the New York Stock Exchange Building on 11 Wall Street and 18 Broad Street and is a National Historic Landmark. An additional trading room, at 30 Broad Street, was closed in February 2007. The NYSE is owned by Intercontinental Exchange, an American holding company that it also lists (). Previously, it was part of NYSE Euronext (NYX), which was formed by the NYSE's 2007 merger with Euronext. History The earliest recorded organization of securities trading in New York among brokers directly dealing with each other can be traced to the Buttonwood Agreement. Previously, sec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Over-the-counter (finance)
Over-the-counter (OTC) or off-exchange trading or pink sheet trading is done directly between two parties, without the supervision of an exchange. It is contrasted with exchange trading, which occurs via exchanges. A stock exchange has the benefit of facilitating liquidity, providing transparency, and maintaining the current market price. In an OTC trade, the price is not necessarily publicly disclosed. OTC trading, as well as exchange trading, occurs with commodities, financial instruments (including stocks), and derivatives of such products. Products traded traditional stock exchanges, and other regulated bourse platforms, must be well standardized. This means that exchanged deliverables match a narrow range of quantity, quality, and identity which is defined by the exchange and identical to all transactions of that product. This is necessary for there to be transparency in stock exchange-based equities trading. The OTC market does not have this limitation. Parties m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apollo 11
Apollo 11 (July 16–24, 1969) was the American spaceflight that first landed humans on the Moon. Commander Neil Armstrong and lunar module pilot Buzz Aldrin landed the Apollo Lunar Module ''Eagle'' on July 20, 1969, at 20:17 UTC, and Armstrong became the first person to step onto the Moon's surface six hours and 39 minutes later, on July 21 at 02:56 UTC. Aldrin joined him 19 minutes later, and they spent about two and a quarter hours together exploring the site they had named Tranquility Base upon landing. Armstrong and Aldrin collected of lunar material to bring back to Earth as pilot Michael Collins flew the Command Module ''Columbia'' in lunar orbit, and were on the Moon's surface for 21 hours, 36 minutes before lifting off to rejoin ''Columbia''. Apollo 11 was launched by a Saturn V rocket from Kennedy Space Center on Merritt Island, Florida, on July 16 at 13:32 UTC, and it was the fifth crewed mission of NASA's Apollo program. The Apollo spacecraft had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Retroreflector
A retroreflector (sometimes called a retroflector or cataphote) is a device or surface that reflection (physics), reflects radiation (usually light) back to its source with minimum scattering. This works at a wide range of angle of incidence (optics), angle of incidence, unlike a planar mirror, which does this only if the mirror is exactly perpendicular to the wave front, having a zero angle of incidence. Being directed, the retroflector's reflection is brighter than that of a diffuse reflector. Corner reflectors and Cat's eye (road), cat's eye reflectors are the most used kinds. Types There are several ways to obtain retroreflection: Corner reflector A set of three mutually perpendicular reflective surfaces, placed to form the internal corner of a cube, work as a retroreflector. The three corresponding normal vectors of the corner's sides form a basis in which to represent the direction of an arbitrary incoming ray, . When the ray reflects from the first side, say x, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reconnaissance Satellite
A reconnaissance satellite or intelligence satellite (commonly, although unofficially, referred to as a spy satellite) is an Earth observation satellite or communications satellite deployed for military or intelligence applications. The first generation type (i.e., Corona and Zenit) took photographs, then ejected canisters of photographic film which would descend back down into Earth's atmosphere. Corona capsules were retrieved in mid-air as they floated down on parachutes. Later, spacecraft had digital imaging systems and downloaded the images via encrypted radio links. In the United States, most information available about reconnaissance satellites is on programs that existed up to 1972, as this information has been declassified due to its age. Some information about programs before that time is still classified information, and a small amount of information is available on subsequent missions. A few up-to-date reconnaissance satellite images have been declassif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Project Genetrix
Project Genetrix, also known as WS-119L, was a United States Air Force program designed to launch General Mills manufactured surveillance balloons over Communist China, Eastern Europe and the Soviet Union to take aerial photographs and collect intelligence. The Genetrix balloons reached altitudes of 50,000–100,000 feet (15–30 km), well above any contemporary fighter plane. In 1955 a number of AN/DMQ-1 gondolas were launched from Lowry Air Force Base in Colorado as a test of the system. One was recovered years later in New Brunswick. Between 10 January and 6 February 1956, a total of 516 high-altitude vehicles were launched from the five different launch sites Gardermoen, Norway; Evanton, Scotland; Oberpfaffenhofen and Giebelstadt, West Germany; and Incirlik, Turkey; 54 were recovered and only 31 provided usable photographs. Numerous balloons were shot down or blown off course, and the flights led to many diplomatic protests from the target countries. MiG fighter pil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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