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Zella McBerty
Zella McBerty (née Helwick; 1879 24 May 1937), was an American businesswoman and engineer, a “''better mechanic than any of the other men that she worked with''” at Packard Electric. Early life Born Zella Helwick in 1879 to a couple from Mineral Ridge, Ohio who died shortly after her birth, she later moved to Warren, Ohio where she married Fred McBerty. They met while working for Packard Electric. Career Together the couple bought 'The Federal Machine and Welder Company'. McBerty held the position of chief financial officer of the company and represented it internationally at conferences. In 1923 article the ''New Castle (Pa.) Herald'', commented that “''when you hear Mrs. McBerty talk ohms and amperes as well as any electrical engineer, there’s hardly a business realm that a capable woman cannot invade''.” She was the first woman to attend the International Association of Electric Welders conference, which she did when it was held in London London is t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mineral Ridge, Ohio
Mineral Ridge is an unincorporated community and census-designated place in southern Trumbull and northern Mahoning counties in the U.S. state of Ohio. The population was 3,951 at the 2020 census. It is a suburb of the Youngstown–Warren metropolitan area. Mineral Ridge was named for valuable coal deposits near the original town site. History The area of Mineral Ridge was primarily a farming community, with some coal mining in the 1830s. In the mid-1850s, John Lewis, superintendent of the Mineral Ridge Coal Mines, discovered black band iron ore beneath the layers of coal ore, leading to a boom of companies working with the blast furnaces of Brier Hill, Niles, and later, Mineral Ridge itself. The main deposit of iron for Youngstown’s growing steel industry, this iron was known as “American Scotch Pig” and “Warner’s Scotch Pig.” By the late 19th century, the mining industry was largely in decline and Mineral Ridge disincorporated in 1917. However, some mines did st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warren, Ohio
Warren is a city in and the county seat of Trumbull County, Ohio, United States. Located in northeastern Ohio, Warren lies approximately northwest of Youngstown and southeast of Cleveland. The population was 39,201 at the 2020 census. The historical county seat of the Connecticut Western Reserve, it is the second largest city in the Youngstown–Warren metropolitan area, and anchors the northern part of that area. History Ephraim Quinby founded Warren in 1798, on of land that he purchased from the Connecticut Land Company, as part of the Connecticut Western Reserve. Quinby named the town for the town's surveyor, Moses Warren. The town was the county seat of the Western Reserve, then became the Trumbull County seat in 1801. In 1833, Warren contained county buildings, two printing offices, a bank, five mercantile stores, and about 600 inhabitants. Warren had a population of nearly 1,600 people in 1846. In that same year, the town had five churches, twenty stores, three newsp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Packard Electric
Ferranti-Packard Ltd. was the Canadian division of Ferranti's global manufacturing empire, formed by the 1958 merger of Ferranti Electric and Packard Electric. For several years in the post-war era, the company underwent a dramatic expansion and had several brushes with success in the computer market, but eventually shed various divisions and returned to being an electrical grid supplier once again. The company was purchased in 1998 by the Austrian company, VA TECH. On July 23, 2005 Siemens PTD purchased VA Tech's Transmission and Distribution Division (T&D) group for transformers and switchgear. History Early years Packard Electric had first been set up in 1894 in order to supply transformers during the Niagara Falls hydroelectric developments. Ferranti Canada had first been set up in 1912, acting primarily as a sales and distribution arm for their British designed electrical products. World War II Prior to World War II, Canada's economy was primarily agricultural. While this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ohm's Law
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship: :I = \frac, where is the current through the conductor, ''V'' is the voltage measured ''across'' the conductor and ''R'' is the resistance of the conductor. More specifically, Ohm's law states that the ''R'' in this relation is constant, independent of the current. If the resistance is not constant, the previous equation cannot be called ''Ohm's law'', but it can still be used as a definition of static/DC resistance. Ohm's law is an empirical relation which accurately describes the conductivity of the vast majority of electrically conductive materials over many orders of magnitude of current. However some materials do not obey Ohm's law; these are called non-ohmic. The law was named after t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ampere
The ampere (, ; symbol: A), often shortened to amp,SI supports only the use of symbols and deprecates the use of abbreviations for units. is the unit of electric current in the International System of Units (SI). One ampere is equal to electrons worth of charge moving past a point in a second. It is named after French mathematician and physicist André-Marie Ampère (1775–1836), considered the father of electromagnetism along with Danish physicist Hans Christian Ørsted. As of the 2019 redefinition of the SI base units, the ampere is defined by fixing the elementary charge to be exactly C ( coulomb), which means an ampere is an electrical current equivalent to elementary charges moving every seconds or elementary charges moving in a second. Prior to the redefinition the ampere was defined as the current that would need to be passed through 2 parallel wires 1 metre apart to produce a magnetic force of newtons per metre. The earlier CGS system had two definitio ... [...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 electrical m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London
London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major settlement for two millennia. The City of London, its ancient core and financial centre, was founded by the Romans as '' Londinium'' and retains its medieval boundaries.See also: Independent city § National capitals The City of Westminster, to the west of the City of London, has for centuries hosted the national government and parliament. Since the 19th century, the name "London" has also referred to the metropolis around this core, historically split between the counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises Greater London, governed by the Greater London Authority.The Greater London Authority consists of the Mayor of London and the London Assembly. The London Mayor is distinguished fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Women's Engineering Society
The Women's Engineering Society is a United Kingdom professional learned society and networking body for women engineers, scientists and technologists. It was the first professional body set up for women working in all areas of engineering, predating the Society of Women Engineers by around 30 years. History The society was formed on 23rd June 1919, after the First World War, during which many women had taken up roles in engineering to replace men who were involved in the military effort. While it had been seen as necessary to bring women into engineering to fill the gap left by men joining the armed forces, the government, employers, and trades unions were against the continuing employment of women after the war. The Restoration of Pre-War Practices Act 1919 gave soldiers returning from World War I their pre-war jobs back and meant many women could no longer work in roles they were employed to fill during the war. This led a group of seven women, including Lady Katharine Parso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Institute Of Electrical Engineers
The American Institute of Electrical Engineers (AIEE) was a United States-based organization of electrical engineers that existed from 1884 through 1962. On January 1, 1963, it merged with the Institute of Radio Engineers (IRE) to form the Institute of Electrical and Electronics Engineers (IEEE). History The 1884 founders of the American Institute of Electrical Engineers (AIEE) included some of the most prominent inventors and innovators in the then new field of electrical engineering, among them Nikola Tesla, Thomas Alva Edison, Elihu Thomson, Edwin J. Houston, and Edward Weston. The purpose of the AIEE was stated "to promote the Arts and Sciences connected with the production and utilization of electricity and the welfare of those employed in these Industries: by means of social intercourse, the reading and discussion of professional papers and the circulation by means of publication among members and associates of information thus obtained." The first president of AIEE was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1879 Births
Events January–March * January 1 – The Specie Resumption Act takes effect. The United States Note is valued the same as gold, for the first time since the American Civil War. * January 11 – The Anglo-Zulu War begins. * January 22 – Anglo-Zulu War – Battle of Isandlwana: A force of 1,200 British soldiers is wiped out by over 20,000 Zulu warriors. * January 23 – Anglo-Zulu War – Battle of Rorke's Drift: Following the previous day's defeat, a smaller British force of 140 successfully repels an attack by 4,000 Zulus. * February 3 – Mosley Street in Newcastle upon Tyne (England) becomes the world's first public highway to be lit by the electric incandescent light bulb invented by Joseph Swan. * February 8 – At a meeting of the Royal Canadian Institute, engineer and inventor Sandford Fleming first proposes the global adoption of standard time. * March 3 – United States Geological Survey is founded. * March 11 – Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1937 Deaths
Events January * January 1 – Anastasio Somoza García becomes President of Nicaragua. * January 5 – Water levels begin to rise in the Ohio River in the United States, leading to the Ohio River flood of 1937, which continues into February, leaving 1 million people homeless and 385 people dead. * January 15 – Spanish Civil War: Second Battle of the Corunna Road ends inconclusively. * January 20 – Second inauguration of Franklin D. Roosevelt: Franklin D. Roosevelt is sworn in for a second term as President of the United States. This is the first time that the United States presidential inauguration occurs on this date; the change is due to the ratification in 1933 of the Twentieth Amendment to the United States Constitution. * January 23 – Moscow Trials: Trial of the Anti-Soviet Trotskyist Center – In the Soviet Union 17 leading Communists go on trial, accused of participating in a plot led by Leon Trotsky to overthrow Joseph Stalin's regime, and assa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Warren County, Ohio
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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