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Lutron
Joel Solon Spira (March 1, 1927 – April 8, 2015) was an American inventor, entrepreneur, and business magnate. He invented a version of the light- dimmer switch for use in homes around the United States and led his Lutron Electronics Company into the production of lighting controllers. Early life and education Spira was born in New York City in 1927 to a Jewish family. He received a Bachelor of Science degree in physics from Purdue University in West Lafayette, Indiana, in 1948 and later sponsored, along with his wife, The Ruth and Joel Spira Award for Outstanding Teaching at Purdue's School of Mechanical Engineering. Career In the 1950s, Spira worked for an aerospace company, where he was assigned to develop a reliable trigger for atomic weapons. Suggested by others at the laboratory, he used designs based on the thyristor, a solid-state semiconductor switch. During his research, he recognized that the device could also be employed to vary the intensity of light p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruth Rodale Spira
Ruth Rodale Spira (December 9, 1928 – August 31, 2019) was an American businesswoman and cookbook author. Early life and education Ruth Rodale was the daughter of J. I. Rodale and Anna Andrews Rodale. Her parents founded Rodale, Inc., Rodale Press, a global publisher of books and magazines based in Emmaus, Pennsylvania. She earned a bachelor's degree in botany at Wellesley College in Wellesley, Massachusetts. Her brother was Robert Rodale, and her niece was Maria Rodale. Career After college, Rodale worked at her parents' book publishing business, and edited ''Organic Gardening''. She lived in Paris from 1952 to 1954. In 1961, she co-founded Joel Spira (businessman), Lutron Electronics, a lighting company, with her husband, who is credited with inventing the solid-state Dimmer, dimmer switch. She was Lutron's co-chair, and headed the company's marketing department from 1982. In 1973, the Spiras founded another company, Subarashii Kudamono, to grow Asian pears in the Lehigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimmer
A dimmer is a device connected to a light fixture and used to lower the brightness of the Lighting, light. By changing the voltage waveform applied to the lamp, it is possible to lower the Luminous intensity, intensity of the light output. Although variable-voltage devices are used for various purposes, the term ''dimmer'' is generally reserved for those intended to lighting control system, control light output from resistive Incandescent light, incandescent, Halogen lamp, halogen, and (more recently) compact fluorescent lamps (CFLs) and light-emitting diodes (LED lamp, LEDs). More specialized equipment is needed to dim Fluorescent lamp, fluorescent, Mercury-vapor lamp, mercury-vapor, Solid-state lighting, solid-state, and other Arc lamp, arc lighting. Dimmers range in size from small units the size of domestic light switches to high-power units used in large theatrical or architectural lighting design, architectural lighting installations. Small domestic dimmers are generally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive with a respective county. The city is the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the United States by both population and urban area. New York is a global center of finance and commerce, culture, technology, entertainment and media, academics, and scientific output, the arts and fashion, and, as home to the headquarters of the United Nations, international diplomacy. With an estimated population in 2024 of 8,478,072 distributed over , the city is the most densely populated major city in the United States. New York City has more than double the population of Los Angeles, the nation's second-most populous city. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rheostat
A potentiometer is a three-terminal (electronics), terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. The measuring instrument called a Potentiometer (measuring instrument), potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an implementation of the same principle, hence its name. Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment. It is also used in speed control of fans. Potentiometers operated by a mechanism can be used as position transducers, for example, in a joystick. Potentiometers are rarely used to directly control significant power (more than a watt), since the power dissipated in the potentiometer would be comparable to the power in the controlled load. Nomenclature Some terms in the electronics industry used t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2015 Deaths
This is a list of lists of deaths of notable people, organized by year. New deaths articles are added to their respective month (e.g., Deaths in ) and then linked below. 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 Earlier years ''Deaths in years earlier than this can usually be found in the main articles of the years.'' See also * Lists of deaths by day * Deaths by year (category) {{DEFAULTSORT:deaths by year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1927 Births
Events January * January 1 – The British Broadcasting ''Company'' becomes the BBC, British Broadcasting ''Corporation'', when its Royal Charter of incorporation takes effect. John Reith, 1st Baron Reith, John Reith becomes the first Director-General. * January 7 ** The first transatlantic telephone call is made ''via radio'' from New York City, United States, to London, United Kingdom. ** The Harlem Globetrotters exhibition basketball team play their first ever road game in Hinckley, Illinois. * January 9 – The Laurier Palace Theatre fire at a movie theatre in Montreal, Quebec, Canada, kills 78 children. * January 10 – Fritz Lang's futuristic film ''Metropolis (1927 film), Metropolis'' is released in Germany. * January 11 – Louis B. Mayer, head of film studio Metro-Goldwyn-Mayer (MGM), announces the creation of the Academy of Motion Picture Arts and Sciences, at a banquet in Los Angeles, California. * January 24 – U.S. Marines United States occ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Society Of Mechanical Engineers
The American Society of Mechanical Engineers (ASME) is an American professional association that, in its own words, "promotes the art, science, and practice of multidisciplinary engineering and allied sciences around the globe" via "continuing education, training and professional development, codes and technical standard, standards, research, conferences and publications, government relations, and other forms of outreach." ASME is thus an engineering society, a standards organization, a research and development organization, an advocacy organization, a provider of training and education, and a nonprofit organization. Founded as an engineering society focused on mechanical engineering in North America, ASME is today multidisciplinary and global. ASME has over 85,000 members in more than 135 countries worldwide. ASME was founded in 1880 by Alexander Lyman Holley, Henry Rossiter Worthington, John Edison Sweet and Matthias N. Forney in response to numerous steam boiler pressure vessel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ASME Leonardo Da Vinci Award
The American Society of Mechanical Engineers Design and Engineering Division awards yearly the Leonardo Da Vinci Award to eminent engineers whose design or invention is recognized as an important advance in machine design. The award is named after Leonardo da Vinci. Winners See also * Other awards and medals of the ASME * ASME Achievement awards * ASME Medal - ASME highest award * List of engineering awards This list of engineering awards is an index to articles about notable awards for achievements in engineering. It includes aerospace engineering, chemical engineering, civil engineering, electrical engineering, electronic engineering, structural e ... References {{ASME Leonardo da Vinci American Society of Mechanical Engineers Awards established in 1978 American science and technology awards 1978 establishments in the United States ASME Medals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Morning Call
''The Morning Call'' is a daily newspaper in Allentown, Pennsylvania. Founded in 1883, it is the second-longest continuously published newspaper in the Lehigh Valley, after '' The Express-Times''. The newspaper is owned by Alden Global Capital, a New York Citybased hedge fund. In 2020, the newspaper permanently closed its Allentown headquarters after allegedly failing to pay four months of rent and citing diminishing advertising revenues. History 19th century ''The Morning Call'' was founded in 1883. Its original name was ''The Critic''. Its original editor, owner and chief reporter was Samuel S. Woolever. The newspaper's first reporter was a Muhlenberg College senior, David A. Miller. The newspaper was subsequently acquired by Charles Weiser, its editor, and Kirt W. DeBelle, its business manager. In 1894, the newspaper launched a reader contest, offering $5 in gold to a school boy or girl in Lehigh County who could guess the publication's new name. The identity of the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of the longest-running newspapers in the United States, the ''Times'' serves as one of the country's Newspaper of record, newspapers of record. , ''The New York Times'' had 9.13 million total and 8.83 million online subscribers, both by significant margins the List of newspapers in the United States, highest numbers for any newspaper in the United States; the total also included 296,330 print subscribers, making the ''Times'' the second-largest newspaper by print circulation in the United States, following ''The Wall Street Journal'', also based in New York City. ''The New York Times'' is published by the New York Times Company; since 1896, the company has been chaired by the Ochs-Sulzberger family, whose current chairman and the paper's publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myocardial Infarction
A myocardial infarction (MI), commonly known as a heart attack, occurs when Ischemia, blood flow decreases or stops in one of the coronary arteries of the heart, causing infarction (tissue death) to the heart muscle. The most common symptom is retrosternal Angina, chest pain or discomfort that classically radiates to the left shoulder, arm, or jaw. The pain may occasionally feel like heartburn. This is the dangerous type of acute coronary syndrome. Other symptoms may include shortness of breath, nausea, presyncope, feeling faint, a diaphoresis, cold sweat, Fatigue, feeling tired, and decreased level of consciousness. About 30% of people have atypical symptoms. Women more often present without chest pain and instead have neck pain, arm pain or feel tired. Among those over 75 years old, about 5% have had an MI with little or no history of symptoms. An MI may cause heart failure, an Cardiac arrhythmia, irregular heartbeat, cardiogenic shock or cardiac arrest. Most MIs occur d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coopersburg, Pennsylvania
Coopersburg is a borough in Lehigh County, Pennsylvania, United States. The population of Coopersburg was 2,447 as of the 2020 census. It is a suburb of Allentown and is located southeast of Allentown, north of Philadelphia, and west of New York City. Coopersburg is part of the Lehigh Valley metropolitan area, which had a population of 861,899 and was the 68th-most populous metropolitan area in the U.S. as of the 2020 census. Geography Coopersburg is located at (40.510262, -75.389901). According to the U.S. Census Bureau, the borough has a total area of , all land. The borough is mostly surrounded by Upper Saucon Township, with two portions in the southeast touching Springfield Township in Bucks County. Demographics As of the census of 2010, there were 2,386 people living in the borough. The racial makeup of the borough was 95.7% White, 0.6% African American, 0.1% Native American, 1.1% Asian, 0.0% Pacific Islander, 0.9% from other races, and 1.5% from two or more r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
