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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 in 1924. McBerty w ... [...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 in 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 s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warren, Ohio
Warren is a city in Trumbull County, Ohio, United States, and its county seat. The population was 39,201 at the 2020 United States census, 2020 census. Located along the Mahoning River, Warren lies approximately northwest of Youngstown, Ohio, Youngstown and southeast of Cleveland. It was the historical county seat of the Connecticut Western Reserve and is a principal city of the Mahoning Valley, Youngstown–Warren metropolitan area in Northeast Ohio. 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 ... [...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 thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ohm's Law
Ohm's law states that the electric current through a Electrical conductor, conductor between two Node (circuits), points is directly Proportionality (mathematics), proportional to the voltage across the two points. Introducing the constant of proportionality, the Electrical resistance, resistance, one arrives at the three mathematical equations used to describe this relationship: V = IR \quad \text\quad I = \frac \quad \text\quad R = \frac where is the current through the conductor, ''V'' is the voltage measured across the conductor and ''R'' is the electrical resistance, 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 Electrical resistance and conductance#Static and differential resistance, static/DC resistance. Ohm's law is an empirical law, empirical rel ... [...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 1 coulomb (C) moving past a point per 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 revision of the SI, the ampere is defined by fixing the elementary charge to be exactly , which means an ampere is an electric current equivalent to elementary charges moving every seconds, or approximately elementary charges moving in a second. Prior to the redefinition, the ampere was defined as the current passing through two parallel wires 1 metre apart that produces a magnetic force of newtons per metre. The earlier CGS system has two units of current, one structured similarly to the S ... [...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 that use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the latter half of the 19th century after the commercialization of the electric telegraph, the telephone, and electrical power generation, distribution, and use. Electrical engineering is 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, Electromagnetism, electromagnetics and waves, microwave engineering, nanotechnology, electrochemistry, renewable energies, mechatronics/control ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London
London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Western Europe, with a population of 14.9 million. London stands on the River Thames in southeast England, at the head of a tidal estuary down to the North Sea, and has been a major settlement for nearly 2,000 years. Its ancient core and financial centre, the City of London, was founded by the Roman Empire, Romans as Londinium and has retained its medieval boundaries. The City of Westminster, to the west of the City of London, has been the centuries-long host of Government of the United Kingdom, the national government and Parliament of the United Kingdom, parliament. London grew rapidly 19th-century London, in the 19th century, becoming the world's List of largest cities throughout history, largest city at the time. Since the 19th cen ... [...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 23 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 Parsons ... [...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 AIE ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1879 Births
Events January * 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. ** Brahms' Violin Concerto is premiered in Leipzig with Joseph Joachim as soloist and the composer conducting. * 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 * 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 ... [...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: The Second Battle of the Corunna Road ends inconclusively. * 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 assassinate its leaders. * January 30 – The Moscow Trial initiated on January 23 is concluded. Thirteen of the defendants are Capital punishment, sentenced to death (including Georgy Pyatakov, Nikolay Muralov and Leonid Serebryakov), while the rest, including Karl Radek and Grigory Sokolnikov are sent to Gulag, labor camps and later murdered. They were i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Warren County, Ohio
The term "the people" refers to the public or common mass of people of a polity. As such it is a concept of human rights law, international law as well as constitutional law, particularly used for claims of popular sovereignty. In contrast, a people is any plurality of persons considered as a whole. Used in politics and law, the term "a people" refers to the collective or community of an ethnic group or nation. Concepts Legal Chapter One, Article One of the Charter of the United Nations states that "peoples" have the right to self-determination. Though the mere status as peoples and the right to self-determination, as for example in the case of Indigenous peoples (''peoples'', as in all groups of indigenous people, not merely all indigenous persons as in ''indigenous people''), does not automatically provide for independent sovereignty and therefore secession. Indeed, judge Ivor Jennings identified the inherent problems in the right of "peoples" to self-determination, as i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
