|
Ralph D. Mershon
Ralph Davenport Mershon (1868–1952) was an electrical engineer and inventor. His company Mershon Condensers was a successful manufacturer of electrolytic capacitors for the expanding radio market of the 1920s. He is known for the Mershon Auditorium (1957) and the Mershon Center for International Security Studies at his alma mater Ohio State University that his estate made possible. In 1956 a biography and summary of his work was published by Ohio State University; the following article is a digest of that publication. Family Ralph D. Mershon was born in Zanesville, Ohio on July 14, 1868. His sister Hope Lord Mershon was born in 1875 and lived to 1953, but their other siblings perished in infancy. His father Ralph Smith Mershon was a watchmaker, having apprenticed in Trenton, New Jersey and Philadelphia. He played violin and was an inventor, devising a compound regulator for timepieces, and a repeating pistol similar to the Girandoni Air Rifle. In 1863 he purchased Henry Kru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zanesville, Ohio
Zanesville is a city in and the county seat of Muskingum County, Ohio, United States. It is located east of Columbus and had a population of 24,765 as of the 2020 census, down from 25,487 as of the 2010 census. Historically the state capital of Ohio, Zanesville anchors the Zanesville micropolitan statistical area (population 86,183), and is part of the greater Columbus-Marion-Zanesville combined statistical area. History Zanesville was named after Ebenezer Zane (1747–1811), who had blazed Zane's Trace, a pioneer trail from Wheeling, Virginia (now in West Virginia) to Maysville, Kentucky through present-day Ohio. In 1797, he remitted land as payment to his son-in-law, John McIntire (1759–1815), at the point where Zane's Trace met the Muskingum River. With the assistance of Zane, McIntire platted the town, opened an inn and ferry by 1799. In 1801, Zanesville was officially renamed, formerly Westbourne, the chosen name for the settlement by Zane. From 1810 to 1812, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Engineering
Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems which use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the latter half of the 19th century after commercialization of the electric telegraph, the telephone, and electrical power generation, distribution, and use. Electrical engineering is now divided into a wide range of different fields, including computer engineering, systems engineering, power engineering, telecommunications, radio-frequency engineering, signal processing, instrumentation, photovoltaic cells, electronics, and optics and photonics. Many of these disciplines overlap with other engineering branches, spanning a huge number of specializations including hardware engineering, power electronics, electromagnetics and waves, microwave engineering, nanotechnology, electrochemistry, renewable energies, mechatronics/control, and ele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leave Of Absence
The labour law concept of leave, specifically paid leave or, in some countries' long-form, a leave of absence, is an authorised prolonged absence from work, for any reason authorised by the workplace. When people "take leave" in this way, they are usually taking days off from their work that have been pre-approved by their employer in their contracts of employment. Labour laws normally mandate that these paid-leave days be compensated at either 100% of normal pay, or at a very high percentage of normal days' pay, such as 75% or 80%. A furlough is a type of leave. There are many subcategories of paid leave, usually dependent on the reasons why the leave is being taken. Sick leave is normally compensated at 100% of pay, while other types of leave are often more restrictive, such as only compensating a certain percentage of normal pay, or as regards paid holidays, which in some countries are granted automatically by national governments, such as in most European Union countries, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Grid
An electrical grid is an interconnected network for electricity delivery from producers to consumers. Electrical grids vary in size and can cover whole countries or continents. It consists of:Kaplan, S. M. (2009). Smart Grid. Electrical Power Transmission: Background and Policy Issues. The Capital.Net, Government Series. Pp. 1-42. * power stations: often located near energy and away from heavily populated areas * electrical substations to step voltage up or down * electric power transmission to carry power long distances * electric power distribution to individual customers, where voltage is stepped down again to the required service voltage(s). Grids are nearly always synchronous, meaning all distribution areas operate with three phase alternating current (AC) frequencies synchronized (so that voltage swings occur at almost the same time). This allows transmission of AC power throughout the area, connecting a large number of electricity generators and consumers and potenti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmission Line
In electrical engineering, a transmission line is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner. The term applies when the conductors are long enough that the wave nature of the transmission must be taken into account. This applies especially to radio-frequency engineering because the short wavelengths mean that wave phenomena arise over very short distances (this can be as short as millimetres depending on frequency). However, the theory of transmission lines was historically developed to explain phenomena on very long telegraph lines, especially submarine telegraph cables. Transmission lines are used for purposes such as connecting radio transmitters and receivers with their antennas (they are then called feed lines or feeders), distributing cable television signals, trunklines routing calls between telephone switching centres, computer network connections and high speed computer data buses. RF engineers comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corona Discharge
A corona discharge is an electrical discharge caused by the ionization of a fluid such as air surrounding a conductor (material), conductor carrying a high voltage. It represents a local region where the air (or other fluid) has undergone electrical breakdown and become conductive, allowing charge to continuously leak off the conductor into the air. A corona discharge occurs at locations where the strength of the electric field (potential gradient) around a conductor exceeds the dielectric strength of the air. It is often seen as a bluish glow in the air adjacent to pointed metal conductors carrying high voltages, and emits light by the same mechanism as a gas discharge lamp. In many high voltage applications, corona is an unwanted side effect. Corona discharge from high voltage electric power transmission lines constitutes an economically significant waste of energy for utilities. In high voltage equipment like cathode ray tube televisions, radio transmitters, X-ray mac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volt
The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827). Definition One volt is defined as the electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. Equivalently, it is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it. It can be expressed in terms of SI base units ( m, kg, s, and A) as : \text = \frac = \frac = \frac. It can also be expressed as amperes times ohms (current times resistance, Ohm's law), webers per second (magnetic flux per time), watts per ampere (power per current), or joules per coulomb (energy per charge), which is also equivalent to electronvolts per elementary charge: : \text = \text\Omega = \fra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telluride, Colorado
Telluride is the county seat and most populous town of San Miguel County in the southwestern portion of the U.S. state of Colorado. The town is a former silver mining camp on the San Miguel River in the western San Juan Mountains. The first gold mining claim was made in the mountains above Telluride in 1875, and early settlement of what is now Telluride followed. The town was founded in 1878 as "Columbia", but due to confusion with a California town of the same name, was renamed Telluride in 1887 for the gold telluride minerals found in other parts of Colorado. These telluride minerals were never found near Telluride, but the area's mines for some years provided zinc, lead, copper, silver, and other gold ores. Telluride sits in a box canyon. Steep forested mountains and cliffs surround it, with Bridal Veil Falls situated at the canyon's head. Numerous weathered ruins of old mining operations dot the hillsides. A free gondola connects the town with its companion town, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles F
Charles is a masculine given name predominantly found in English and French speaking countries. It is from the French form ''Charles'' of the Proto-Germanic name (in runic alphabet) or ''*karilaz'' (in Latin alphabet), whose meaning was "free man". The Old English descendant of this word was '' Ċearl'' or ''Ċeorl'', as the name of King Cearl of Mercia, that disappeared after the Norman conquest of England. The name was notably borne by Charlemagne (Charles the Great), and was at the time Latinized as ''Karolus'' (as in ''Vita Karoli Magni''), later also as '' Carolus''. Some Germanic languages, for example Dutch and German, have retained the word in two separate senses. In the particular case of Dutch, ''Karel'' refers to the given name, whereas the noun ''kerel'' means "a bloke, fellow, man". Etymology The name's etymology is a Common Germanic noun ''*karilaz'' meaning "free man", which survives in English as churl (< Old English ''ċeorl''), which developed its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Power Distribution
Electric power distribution is the final stage in the delivery of electric power; it carries electricity from the transmission system to individual consumers. Distribution substations connect to the transmission system and lower the transmission voltage to medium voltage ranging between and with the use of transformers. ''Primary'' distribution lines carry this medium voltage power to distribution transformers located near the customer's premises. Distribution transformers again lower the voltage to the utilization voltage used by lighting, industrial equipment and household appliances. Often several customers are supplied from one transformer through ''secondary'' distribution lines. Commercial and residential customers are connected to the secondary distribution lines through service drops. Customers demanding a much larger amount of power may be connected directly to the primary distribution level or the subtransmission level. The transition from transmission to distrib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transformer
A transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any coil due to a changing magnetic flux encircled by the coil. Transformers are used to change AC voltage levels, such transformers being termed step-up or step-down type to increase or decrease voltage level, respectively. Transformers can also be used to provide galvanic isolation between circuits as well as to couple stages of signal-processing circuits. Since the invention of the first constant-potential transfo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Pittsburgh, Pennsylvania
East Pittsburgh is a borough in Allegheny County, Pennsylvania, about southeast of the confluence of the Monongahela and the Allegheny rivers at Pittsburgh. The population in 1900 stood at 2,883, and in 1910, at 5,615. As of the 2020 census, the borough population was 1,927, having fallen from 6,079 in 1940. George Westinghouse erected large works there which supplied equipment to the great power plants at Niagara Falls and for the elevated and rapid-transit systems of New York. Nearby, the George Westinghouse Bridge over Turtle Creek is a prominent fixture in the area, which is very near the borough of Braddock. History The first transmission from pioneering radio station KDKA (AM) was made from East Pittsburgh on November 2, 1920. In 1928, an early demonstration of a new medium was conducted at the Westinghouse laboratories in East Pittsburgh. Eventually, the new medium became known as television. Vladimir Zworykin worked for Westinghouse Electric Corporation at that tim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
