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86-560: The Dayton-Wright Company was formed in 1917, on the declaration of war between the United States and Germany, by a group of Ohio investors that included Charles F. Kettering and Edward A. Deeds of Dayton Engineering Laboratories Company ( DELCO ). Orville Wright lent his name and served as a consultant, but other than that, the location of one of its three factories in the original Wright Company factory buildings in Dayton, Ohio

172-721: A Dewar Trophy in 1913. Kettering helped found the Engineers Club of Dayton in 1914. In 1914, Flexible Sidecar Company was incorporated with the help of Kettering, who then became president of the company and joined the board of directors. Kettering provided significant funding for the company in its early years, particularly after 1916, when Kettering sold his firm, the Dayton Engineering Laboratories Company (Delco), to United Motors Company for $ 2.5 million. Kettering continued to serve as president of Flxible until he became chairman of

258-470: A mass-production basis, they opened the door for more compact devices. The first integrated circuits were the hybrid integrated circuit invented by Jack Kilby at Texas Instruments in 1958 and the monolithic integrated circuit chip invented by Robert Noyce at Fairchild Semiconductor in 1959. The MOSFET (metal–oxide–semiconductor field-effect transistor, or MOS transistor) was invented by Mohamed Atalla and Dawon Kahng at BTL in 1959. It

344-807: A professional body or an international standards organization. These include the International Electrotechnical Commission (IEC), the National Society of Professional Engineers (NSPE), the Institute of Electrical and Electronics Engineers (IEEE) and the Institution of Engineering and Technology (IET, formerly the IEE). Electrical engineers work in a very wide range of industries and the skills required are likewise variable. These range from circuit theory to

430-412: A clear distinction between magnetism and static electricity . He is credited with establishing the term "electricity". He also designed the versorium : a device that detects the presence of statically charged objects. In 1762 Swedish professor Johan Wilcke invented a device later named electrophorus that produced a static electric charge. By 1800 Alessandro Volta had developed the voltaic pile ,

516-416: A conference center. Some of Charles' memorable quotations are: "It doesn't matter if you try and try and try again, and fail. It does matter if you try and fail, and fail to try again.", "Failures are finger posts on the road to achievement.", "My interest is in the future because I am going to spend the rest of my life there." . Kettering died on November 25, 1958. After his death, his body lay in honor at

602-526: A degree is usually four or five years and the completed degree may be designated as a Bachelor of Science in Electrical/Electronics Engineering Technology, Bachelor of Engineering , Bachelor of Science, Bachelor of Technology , or Bachelor of Applied Science , depending on the university. The bachelor's degree generally includes units covering physics , mathematics, computer science , project management , and

688-415: A forerunner of the electric battery. In the 19th century, research into the subject started to intensify. Notable developments in this century include the work of Hans Christian Ørsted , who discovered in 1820 that an electric current produces a magnetic field that will deflect a compass needle; of William Sturgeon , who in 1825 invented the electromagnet ; of Joseph Henry and Edward Davy , who invented

774-643: A general electronic component. The most common microelectronic components are semiconductor transistors , although all main electronic components ( resistors , capacitors etc.) can be created at a microscopic level. Nanoelectronics is the further scaling of devices down to nanometer levels. Modern devices are already in the nanometer regime, with below 100 nm processing having been standard since around 2002. Microelectronic components are created by chemically fabricating wafers of semiconductors such as silicon (at higher frequencies, compound semiconductors like gallium arsenide and indium phosphide) to obtain

860-459: A huge number of specializations including hardware engineering, power electronics , electromagnetics and waves, microwave engineering , nanotechnology , electrochemistry , renewable energies, mechatronics/control, and electrical materials science. Electrical engineers typically hold a degree in electrical engineering, electronic or electrical and electronic engineering. Practicing engineers may have professional certification and be members of

946-407: A large number—often millions—of tiny electrical components, mainly transistors , into a small chip around the size of a coin . This allowed for the powerful computers and other electronic devices we see today. Microelectronics engineering deals with the design and microfabrication of very small electronic circuit components for use in an integrated circuit or sometimes for use on their own as

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1032-749: A lifelong business, professional and personal relationship. In 1914, recognizing that Dayton was among the leading industrial cities in the US because of the skilled engineers and technicians in the city, they founded the Engineers Club of Dayton and the Foreman's Club of Dayton, which later on became the National Management Association . Kettering held 186 U.S. patents . He invented the all-electric starting, ignition , and lighting system for automobiles. Electric starters replaced crank (manual) starting of automobiles. First incorporated in

1118-492: A practical inventor. As he said, "I didn't hang around much with other inventors and the executive fellows. I lived with the sales gang. They had some real notion of what people wanted." During his five years at NCR, from 1904 to 1909, Kettering secured 23 patents for NCR. He attributed his success to a good amount of luck but added, "I notice the harder I work, the luckier I get." Beginning in 1907, his NCR colleague Edward A. Deeds convinced Kettering to develop improvements for

1204-457: A profession in the later 19th century. Practitioners had created a global electric telegraph network, and the first professional electrical engineering institutions were founded in the UK and the US to support the new discipline. Francis Ronalds created an electric telegraph system in 1816 and documented his vision of how the world could be transformed by electricity. Over 50 years later, he joined

1290-493: A self-starter small enough to be practical he consulted Kettering, and Delco developed a practical model by February 1911. Kettering's key insight lay in devising an electrical system performing the three functions it still serves in modern cars: starter; producer of spark for ignition; and source of current for lighting. Leland ordered 12,000 self-starters for his 1912 models; Delco had to then transition from its research and development activities to production. The invention won

1376-474: A tribute to Charles Kettering's life and his work in healthcare research. On January 1, 1998, the former General Motors Institute changed its name to Kettering University to honor Kettering as a founder. In 1998, GMI Engineering and Management Institute (formerly General Motors Institute), of Flint, Michigan , changed its name to Kettering University in honor of Kettering. His ideals, prowess, and belief in co-operative education continue there. Kettering

1462-426: A variety of industries. Electronic engineering involves the design and testing of electronic circuits that use the properties of components such as resistors , capacitors , inductors , diodes , and transistors to achieve a particular functionality. The tuned circuit , which allows the user of a radio to filter out all but a single station, is just one example of such a circuit. Another example to research

1548-470: Is a pneumatic signal conditioner. Prior to the Second World War, the subject was commonly known as radio engineering and basically was restricted to aspects of communications and radar , commercial radio , and early television . Later, in post-war years, as consumer devices began to be developed, the field grew to include modern television, audio systems, computers, and microprocessors . In

1634-752: Is also remembered through the Memorial Sloan-Kettering Cancer Center , a cancer research and treatment center in New York City, and through the Kettering Health Network , which includes several hospitals and medical center campuses as well as Kettering College in Kettering, Ohio . The city of Kettering, Ohio , a suburb of Dayton, was named after him when it was incorporated in 1955. The former U.S. Army Air Service testing field, McCook Field ,

1720-444: Is an engineering discipline that deals with the convergence of electrical and mechanical systems. Such combined systems are known as electromechanical systems and have widespread adoption. Examples include automated manufacturing systems , heating, ventilation and air-conditioning systems , and various subsystems of aircraft and automobiles . Electronic systems design is the subject within electrical engineering that deals with

1806-515: Is named for him, also Kettering Hall of Science at Oberlin College . At Antioch College , the 1929 Science Building he donated was not named after him (it is now the Arts and Science Building), but the school's 33.000-square-foot Charles F. Kettering Building was (the same being originally a research facility, now home to campus radio station WYSO ), while the college's Olive Kettering Library

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1892-559: Is now a Dayton park called Kettering Field. Several U.S. public schools are named after him: The endowed Olive Williams Kettering Chair of The College of Wooster Department of Music is named in honor of his wife. The University of Dayton 's engineering building, Kettering Labs, is named after him. The Kettering Science center on the Ashland University campus in Ohio is named for him. Kettering Hall at Wilmington College

1978-798: Is still important in the design of many control systems . DSP processor ICs are found in many types of modern electronic devices, such as digital television sets , radios, hi-fi audio equipment, mobile phones, multimedia players , camcorders and digital cameras, automobile control systems, noise cancelling headphones, digital spectrum analyzers , missile guidance systems, radar systems, and telematics systems. In such products, DSP may be responsible for noise reduction , speech recognition or synthesis , encoding or decoding digital media, wirelessly transmitting or receiving data, triangulating positions using GPS , and other kinds of image processing , video processing , audio processing , and speech processing . Instrumentation engineering deals with

2064-461: Is their power consumption as this is closely related to their signal strength . Typically, if the power of the transmitted signal is insufficient once the signal arrives at the receiver's antenna(s), the information contained in the signal will be corrupted by noise , specifically static. Control engineering focuses on the modeling of a diverse range of dynamic systems and the design of controllers that will cause these systems to behave in

2150-567: Is very useful for energy transmission as well as for information transmission. These were also the first areas in which electrical engineering was developed. Today, electrical engineering has many subdisciplines, the most common of which are listed below. Although there are electrical engineers who focus exclusively on one of these subdisciplines, many deal with a combination of them. Sometimes, certain fields, such as electronic engineering and computer engineering , are considered disciplines in their own right. Power & Energy engineering deals with

2236-582: The College of Wooster , before transferring to Ohio State University . He was a member of the Delta Upsilon fraternity. Eye problems forced him to withdraw, and he took a job as foreman of a telephone line crew. At first, the termination of his studies caused him to be depressed. Then he found ways to apply his electrical engineering skills on the job, and his spirits revived. He also met his future wife, Olive Williams. When his eye condition improved, he

2322-792: The Z3 , the world's first fully functional and programmable computer using electromechanical parts. In 1943, Tommy Flowers designed and built the Colossus , the world's first fully functional, electronic, digital and programmable computer. In 1946, the ENIAC (Electronic Numerical Integrator and Computer) of John Presper Eckert and John Mauchly followed, beginning the computing era. The arithmetic performance of these machines allowed engineers to develop completely new technologies and achieve new objectives. In 1948, Claude Shannon published "A Mathematical Theory of Communication" which mathematically describes

2408-548: The compression , error detection and error correction of digitally sampled signals. Signal processing is a very mathematically oriented and intensive area forming the core of digital signal processing and it is rapidly expanding with new applications in every field of electrical engineering such as communications, control, radar, audio engineering , broadcast engineering , power electronics, and biomedical engineering as many already existing analog systems are replaced with their digital counterparts. Analog signal processing

2494-658: The doubling of transistors on an IC chip every two years, predicted by Gordon Moore in 1965. Silicon-gate MOS technology was developed by Federico Faggin at Fairchild in 1968. Since then, the MOSFET has been the basic building block of modern electronics. The mass-production of silicon MOSFETs and MOS integrated circuit chips, along with continuous MOSFET scaling miniaturization at an exponential pace (as predicted by Moore's law ), has since led to revolutionary changes in technology, economy, culture and thinking. The Apollo program which culminated in landing astronauts on

2580-520: The electrical relay in 1835; of Georg Ohm , who in 1827 quantified the relationship between the electric current and potential difference in a conductor ; of Michael Faraday , the discoverer of electromagnetic induction in 1831; and of James Clerk Maxwell , who in 1873 published a unified theory of electricity and magnetism in his treatise Electricity and Magnetism . In 1782, Georges-Louis Le Sage developed and presented in Berlin probably

2666-452: The generation , transmission , and distribution of electricity as well as the design of a range of related devices. These include transformers , electric generators , electric motors , high voltage engineering, and power electronics . In many regions of the world, governments maintain an electrical network called a power grid that connects a variety of generators together with users of their energy. Users purchase electrical energy from

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2752-448: The transmission of information across a communication channel such as a coax cable , optical fiber or free space . Transmissions across free space require information to be encoded in a carrier signal to shift the information to a carrier frequency suitable for transmission; this is known as modulation . Popular analog modulation techniques include amplitude modulation and frequency modulation . The choice of modulation affects

2838-599: The "aerial torpedo", nicknamed the Kettering Bug . The 300 lb (136 kg) papier-mache missile had 12 foot (3.6 m) cardboard wings, and a 40 hp (30 kW) engine. It could carry 300 lbs (136 kg) of high explosives at 50 mph (80 km/h), and cost $ 400. The "Bug" is considered the first aerial missile, and lessons learned from the "Bug" led to development of the first guided missiles, as well as radio-controlled drones. Kettering and colleagues' development of leaded gasoline ultimately caused

2924-429: The 1850s had shown the relationship of different forms of electromagnetic radiation including the possibility of invisible airborne waves (later called "radio waves"). In his classic physics experiments of 1888, Heinrich Hertz proved Maxwell's theory by transmitting radio waves with a spark-gap transmitter , and detected them by using simple electrical devices. Other physicists experimented with these new waves and in

3010-440: The 1912 Cadillac , all-electric starting aided in the growth of the US auto industry by making the automobile easy for anyone to start. Other patents included a portable lighting system and an incubator for premature infants. His engine-driven generator was combined with storage batteries to form a " Delco Plant", providing electrical power for farmsteads and other locations far from the power grid . In 1918 Kettering designed

3096-854: The Dayton Metal Products Company. Then they formed the Dayton Airplane Company in 1917, which was reorganized as the Dayton-Wright Company in April. When the war began, Deeds was commissioned and put in charge of procurement for the Aircraft Production Board. He divested himself of his financial interest in Dayton-Wright but awarded the company two contracts to produce more than 4,000 DH-4 and Standard SJ-1 aircraft. Given

3182-619: The Dayton-Wright Company had just started producing side-by-side TW-3 aircraft, powered with World War I surplus Wright E engines (American-built 180 hp Hispano-Suiza) when it was closed down by the parent company General Motors , which had purchased it in 1919. Its design rights, chief designer (Colonel Virginius E. Clark ), and the TW-3 contract, were acquired by the newly formed Consolidated Aircraft Corporation of Buffalo, New York in 1923. Subsequent TW-3 aircraft were delivered as Consolidated TW-3s . Charles F. Kettering Charles

3268-515: The Engineers Club and then was interred in the mausoleum at Woodland Cemetery, Dayton, Ohio . Max D. Liston , one of Kettering's co-workers at GM, described him "one of the gods of the automotive field, particularly from an inventive standpoint." Liston quoted Kettering as advising him, "People won't ever remember how many failures you've had, but they will remember how well it worked the last time you tried it." Kettering and Deeds had

3354-661: The Moon with Apollo 11 in 1969 was enabled by NASA 's adoption of advances in semiconductor electronic technology , including MOSFETs in the Interplanetary Monitoring Platform (IMP) and silicon integrated circuit chips in the Apollo Guidance Computer (AGC). The development of MOS integrated circuit technology in the 1960s led to the invention of the microprocessor in the early 1970s. The first single-chip microprocessor

3440-580: The Royal Academy of Natural Sciences and Arts of Barcelona. Salva's electrolyte telegraph system was very innovative though it was greatly influenced by and based upon two discoveries made in Europe in 1800—Alessandro Volta's electric battery for generating an electric current and William Nicholson and Anthony Carlyle's electrolysis of water. Electrical telegraphy may be considered the first example of electrical engineering. Electrical engineering became

3526-558: The amplifier tube, called the triode . In 1920, Albert Hull developed the magnetron which would eventually lead to the development of the microwave oven in 1946 by Percy Spencer . In 1934, the British military began to make strides toward radar (which also uses the magnetron) under the direction of Dr Wimperis, culminating in the operation of the first radar station at Bawdsey in August 1936. In 1941, Konrad Zuse presented

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3612-815: The applications of computer engineering. Photonics and optics deals with the generation, transmission, amplification, modulation, detection, and analysis of electromagnetic radiation . The application of optics deals with design of optical instruments such as lenses , microscopes , telescopes , and other equipment that uses the properties of electromagnetic radiation. Other prominent applications of optics include electro-optical sensors and measurement systems, lasers , fiber-optic communication systems, and optical disc systems (e.g. CD and DVD). Photonics builds heavily on optical technology, supplemented with modern developments such as optoelectronics (mostly involving semiconductors ), laser systems, optical amplifiers and novel materials (e.g. metamaterials ). Mechatronics

3698-915: The automobile. Deeds and Kettering invited other NCR engineers, including Harold E. Talbott , to join them nights and weekends in their tinkering at Deeds's barn. They became known as the "Barn Gang," and Kettering was called Boss Ket. Their first goal was to find a replacement for the magneto . In 1909, Kettering resigned from NCR to work full-time on automotive developments, and the group incorporated as Dayton Engineering Laboratories Company , or Delco. The hand crank used to start early automobiles could kick back under some circumstances. Byron Carter , founder of Cartercar , died from complications after such an accident in Detroit's Belle Isle park. Henry M. Leland  – the head of Cadillac  – became determined to develop an electric self-starting device. When Leland's engineers failed to develop

3784-763: The board in 1940, a position that he held until his death in 1958. Delco was sold to General Motors in 1918, as part of United Motors. Delco became the foundation for the General Motors Research Corporation and Delco Electronics . Kettering became vice-president of General Motors Research Corporation in 1920 and held the position for 27 years. Between 1918 and 1923, he led the research and development at GM's Dayton research laboratories to commercialize air-cooled engines for cars and trucks. The GM "copper-cooled" automotive engine used fans forcing air across copper fins for heat dissipation. The commercialization, attempted between 1921 and 1923,

3870-618: The company survived the scandal. It went on to produce the XPS-1 , the first airplane held by the U.S. Army with retractable landing gear. In 1919, Dayton-Wright built a limousine version of the DH-4, the single-seat Messenger , and a three-seater. In 1920, Milton C. Baumann designed the RB-1 racer , with solid balsa wood wing, enclosed cockpit, and retractable landing gear linked to rod-operated leading and trailing-edge camber-changing flaps. In 1923

3956-509: The company's inexperience, the size of its contract led to charges of favoritism. A United States Senate committee corroborated these allegations, and U.S. President Woodrow Wilson appointed a commission headed by future Supreme Court of the United States Chief Justice Charles Evans Hughes to investigate. Although mismanagement and favoritism were documented, charges were not brought, and

4042-413: The cost and performance of a system and these two factors must be balanced carefully by the engineer. Once the transmission characteristics of a system are determined, telecommunication engineers design the transmitters and receivers needed for such systems. These two are sometimes combined to form a two-way communication device known as a transceiver . A key consideration in the design of transmitters

4128-519: The curvature of the Earth. Marconi later transmitted the wireless signals across the Atlantic between Poldhu, Cornwall , and St. John's, Newfoundland , a distance of 2,100 miles (3,400 km). Millimetre wave communication was first investigated by Jagadish Chandra Bose during 1894–1896, when he reached an extremely high frequency of up to 60   GHz in his experiments. He also introduced

4214-500: The design of devices to measure physical quantities such as pressure , flow , and temperature. The design of such instruments requires a good understanding of physics that often extends beyond electromagnetic theory . For example, flight instruments measure variables such as wind speed and altitude to enable pilots the control of aircraft analytically. Similarly, thermocouples use the Peltier-Seebeck effect to measure

4300-561: The design of new hardware . Computer engineers may also work on a system's software. However, the design of complex software systems is often the domain of software engineering, which is usually considered a separate discipline. Desktop computers represent a tiny fraction of the devices a computer engineer might work on, as computer-like architectures are now found in a range of embedded devices including video game consoles and DVD players . Computer engineers are involved in many hardware and software aspects of computing. Robots are one of

4386-577: The desired manner. To implement such controllers, electronics control engineers may use electronic circuits , digital signal processors , microcontrollers , and programmable logic controllers (PLCs). Control engineering has a wide range of applications from the flight and propulsion systems of commercial airliners to the cruise control present in many modern automobiles . It also plays an important role in industrial automation . Control engineers often use feedback when designing control systems . For example, in an automobile with cruise control

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4472-420: The desired transport of electronic charge and control of current. The field of microelectronics involves a significant amount of chemistry and material science and requires the electronic engineer working in the field to have a very good working knowledge of the effects of quantum mechanics . Signal processing deals with the analysis and manipulation of signals . Signals can be either analog , in which case

4558-507: The first Department of Electrical Engineering in the United States. In the same year, University College London founded the first chair of electrical engineering in Great Britain. Professor Mendell P. Weinbach at University of Missouri established the electrical engineering department in 1886. Afterwards, universities and institutes of technology gradually started to offer electrical engineering programs to their students all over

4644-583: The future it is hoped the devices will help build tiny implantable medical devices and improve optical communication . In aerospace engineering and robotics , an example is the most recent electric propulsion and ion propulsion. Electrical engineers typically possess an academic degree with a major in electrical engineering, electronics engineering , electrical engineering technology , or electrical and electronic engineering. The same fundamental principles are taught in all programs, though emphasis may vary according to title. The length of study for such

4730-533: The grid, avoiding the costly exercise of having to generate their own. Power engineers may work on the design and maintenance of the power grid as well as the power systems that connect to it. Such systems are called on-grid power systems and may supply the grid with additional power, draw power from the grid, or do both. Power engineers may also work on systems that do not connect to the grid, called off-grid power systems, which in some cases are preferable to on-grid systems. Telecommunications engineering focuses on

4816-458: The international standardization of the units volt , ampere , coulomb , ohm , farad , and henry . This was achieved at an international conference in Chicago in 1893. The publication of these standards formed the basis of future advances in standardization in various industries, and in many countries, the definitions were immediately recognized in relevant legislation. During these years,

4902-399: The management skills of a project manager . The tools and equipment that an individual engineer may need are similarly variable, ranging from a simple voltmeter to sophisticated design and manufacturing software. Electricity has been a subject of scientific interest since at least the early 17th century. William Gilbert was a prominent early electrical scientist, and was the first to draw

4988-446: The mid-to-late 1950s, the term radio engineering gradually gave way to the name electronic engineering . Before the invention of the integrated circuit in 1959, electronic circuits were constructed from discrete components that could be manipulated by humans. These discrete circuits consumed much space and power and were limited in speed, although they are still common in some applications. By contrast, integrated circuits packed

5074-511: The multi-disciplinary design issues of complex electrical and mechanical systems. The term mechatronics is typically used to refer to macroscopic systems but futurists have predicted the emergence of very small electromechanical devices. Already, such small devices, known as microelectromechanical systems (MEMS), are used in automobiles to tell airbags when to deploy, in digital projectors to create sharper images, and in inkjet printers to create nozzles for high definition printing. In

5160-519: The new Society of Telegraph Engineers (soon to be renamed the Institution of Electrical Engineers ) where he was regarded by other members as the first of their cohort. By the end of the 19th century, the world had been forever changed by the rapid communication made possible by the engineering development of land-lines, submarine cables , and, from about 1890, wireless telegraphy . Practical applications and advances in such fields created an increasing need for standardized units of measure . They led to

5246-525: The passage of information with uncertainty ( electrical noise ). The first working transistor was a point-contact transistor invented by John Bardeen and Walter Houser Brattain while working under William Shockley at the Bell Telephone Laboratories (BTL) in 1947. They then invented the bipolar junction transistor in 1948. While early junction transistors were relatively bulky devices that were difficult to manufacture on

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5332-401: The process developed devices for transmitting and detecting them. In 1895, Guglielmo Marconi began work on a way to adapt the known methods of transmitting and detecting these "Hertzian waves" into a purpose-built commercial wireless telegraphic system. Early on, he sent wireless signals over a distance of one and a half miles. In December 1901, he sent wireless waves that were not affected by

5418-444: The release of large quantities of lead into the atmosphere as a result of the combustion of leaded gasoline all over the world. Due to the neurotoxic effects of lead , leaded gasoline has been widely banned since the late 1990s. The development of Freon using CFCs has been implicated in the depletion of the ozone layer . He developed the idea of Duco paint and helped develop diesel engines and ways to harness solar energy . He

5504-425: The signal varies continuously according to the information, or digital , in which case the signal varies according to a series of discrete values representing the information. For analog signals, signal processing may involve the amplification and filtering of audio signals for audio equipment or the modulation and demodulation of signals for telecommunications. For digital signals, signal processing may involve

5590-411: The study of electricity was largely considered to be a subfield of physics since early electrical technology was considered electromechanical in nature. The Technische Universität Darmstadt founded the world's first department of electrical engineering in 1882 and introduced the first-degree course in electrical engineering in 1883. The first electrical engineering degree program in the United States

5676-461: 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

5762-444: The temperature difference between two points. Often instrumentation is not used by itself, but instead as the sensors of larger electrical systems. For example, a thermocouple might be used to help ensure a furnace's temperature remains constant. For this reason, instrumentation engineering is often viewed as the counterpart of control. Computer engineering deals with the design of computers and computer systems . This may involve

5848-478: The theoretical basis of alternating current engineering. The spread in the use of AC set off in the United States what has been called the war of the currents between a George Westinghouse backed AC system and a Thomas Edison backed DC power system, with AC being adopted as the overall standard. During the development of radio , many scientists and inventors contributed to radio technology and electronics. The mathematical work of James Clerk Maxwell during

5934-424: The use of semiconductor junctions to detect radio waves, when he patented the radio crystal detector in 1901. In 1897, Karl Ferdinand Braun introduced the cathode-ray tube as part of an oscilloscope , a crucial enabling technology for electronic television . John Fleming invented the first radio tube, the diode , in 1904. Two years later, Robert von Lieben and Lee De Forest independently developed

6020-557: The use of transformers , developed rapidly in the 1880s and 1890s with transformer designs by Károly Zipernowsky , Ottó Bláthy and Miksa Déri (later called ZBD transformers), Lucien Gaulard , John Dixon Gibbs and William Stanley Jr. Practical AC motor designs including induction motors were independently invented by Galileo Ferraris and Nikola Tesla and further developed into a practical three-phase form by Mikhail Dolivo-Dobrovolsky and Charles Eugene Lancelot Brown . Charles Steinmetz and Oliver Heaviside contributed to

6106-538: The use of TEL as an additive instead of other options. Kettering became the first president of the newly founded Ethyl Corporation that started to produce TEL in 1923. One year later, he hired Robert A. Kehoe as the medical expert to proclaim that leaded gasoline was safe for humans. That its use was an ecological disaster leading to a global lead contamination was not acknowledged until many decades later. Kettering married Olive Williams of Ashland, Ohio, on August 1, 1905. Their only child, Eugene Williams Kettering,

6192-485: The vehicle's speed is continuously monitored and fed back to the system which adjusts the motor's power output accordingly. Where there is regular feedback, control theory can be used to determine how the system responds to such feedback. Control engineers also work in robotics to design autonomous systems using control algorithms which interpret sensory feedback to control actuators that move robots such as autonomous vehicles , autonomous drones and others used in

6278-414: The world's first form of electric telegraphy , using 24 different wires, one for each letter of the alphabet. This telegraph connected two rooms. It was an electrostatic telegraph that moved gold leaf through electrical conduction. In 1795, Francisco Salva Campillo proposed an electrostatic telegraph system. Between 1803 and 1804, he worked on electrical telegraphy, and in 1804, he presented his report at

6364-497: The world. During these decades the use of electrical engineering increased dramatically. In 1882, Thomas Edison switched on the world's first large-scale electric power network that provided 110 volts— direct current (DC)—to 59 customers on Manhattan Island in New York City. In 1884, Sir Charles Parsons invented the steam turbine allowing for more efficient electric power generation. Alternating current , with its ability to transmit power more efficiently over long distances via

6450-541: Was a pioneer in the application of magnetism to medical diagnostic techniques. His inventions, especially the electric automobile starter, made him wealthy. In 1945, he helped found what became the Memorial Sloan Kettering Cancer Center , based on the premise that American industrial research techniques could be applied to cancer research. . His son and daughter-in-law, Eugene and Virginia, created Kettering Medical Center in Ohio, as

6536-476: Was able to return to his studies and graduated from OSU in 1904 with an electrical engineering degree. Kettering was hired directly out of school to head the research laboratory at National Cash Register (later known as NCR Corporation). Kettering invented an easy credit approval system, a precursor to today's credit cards, and the electric cash register in 1906, which made ringing up sales physically much easier for sales clerks. Kettering distinguished himself as

6622-513: Was born in Loudonville, Ohio , United States, the fourth of five children of Jacob Henry Kettering and Martha (Hunter) Kettering. Poor eyesight gave him headaches in school. After graduation he followed his sister Emma into a teaching position at Bunker Hill School. By all accounts he was an engaging and innovative teacher. He attracted students to evening scientific demonstrations on electricity, heat, magnetism, and gravity. He took classes at

6708-664: Was born on April 20, 1908. Eugene joined Winton Engine in 1930, which was acquired by General Motors and was eventually incorporated into the General Motors Electro-Motive Division (EMD) . He became a central figure in the development of the EMD 567 locomotive engine and the Detroit Diesel 6-71 engine , serving at EMD until his retirement in 1960. Charles Kettering built a house, "Ridgeleigh Terrace" , in 1914. According to local sources, it

6794-406: Was named after his wife. 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 ,

6880-489: Was started at Massachusetts Institute of Technology (MIT) in the physics department under Professor Charles Cross, though it was Cornell University to produce the world's first electrical engineering graduates in 1885. The first course in electrical engineering was taught in 1883 in Cornell's Sibley College of Mechanical Engineering and Mechanic Arts . In about 1885, Cornell President Andrew Dickson White established

6966-458: Was the Intel 4004 , released in 1971. The Intel 4004 was designed and realized by Federico Faggin at Intel with his silicon-gate MOS technology, along with Intel's Marcian Hoff and Stanley Mazor and Busicom's Masatoshi Shima. The microprocessor led to the development of microcomputers and personal computers, and the microcomputer revolution . One of the properties of electricity is that it

7052-404: Was the first in the United States to have electric air conditioning using freon. Ridgeleigh Terrace was the home of his son, Eugene, until his death. Eugene's wife, Virginia , lived in the house for many years, restoring and redecorating it. In the late 1990s, the house largely destroyed in a fire, and was rebuilt with serious deviation from the original blueprints to accommodate its current use as

7138-474: Was the first truly compact transistor that could be miniaturised and mass-produced for a wide range of uses. It revolutionized the electronics industry , becoming the most widely used electronic device in the world. The MOSFET made it possible to build high-density integrated circuit chips. The earliest experimental MOS IC chip to be fabricated was built by Fred Heiman and Steven Hofstein at RCA Laboratories in 1962. MOS technology enabled Moore's law ,

7224-891: Was the only connection to the Wright brothers. In addition to plant 3 (the former Wright Company buildings), Dayton-Wright operated factories in Moraine (plant 1, the main factory) and Miamisburg (plant 2), Ohio. During the course of the war, Dayton-Wright produced about 3,000 DH-4s , as well as 400 Standard SJ-1 trainers. The company was hurt by the reputation of the DH-4s it produced as "flaming coffins" or "flying coffins", although they were not in reality more subject to catching fire than other aircraft, and by scandals it faced. Deeds and Kettering had previously worked together in several ventures. Deeds' DELCO produced automobile self-starters developed by Kettering. The two used DELCO's profits to form

7310-582: Was to mix ethanol with gasoline, while his "low percentage solution" looked for additives that would be added in small quantities to increase what later would be called the octane rating of gasoline. Thomas Midgley Jr. and Kettering identified tetraethyllead (TEL) in December 1921 as an additive that would eliminate engine knocking at a dilution of one thousand to one. While use of ethanol could not be patented, TEL's use as an additive could. Kettering and Midgley secured its patent and proceeded to promote

7396-566: Was unsuccessful due to a combination of factors, nontechnical and technical. Air-cooled engines have had commercial success before and since, used widely in such applications as lawnmowers, small aircraft, and automobiles - notably the Volkswagen Beetle and many generations of Porsche sports cars. Kettering's research in fuel was based on his belief that oil would be in short supply and additives would allow more efficient engines with higher compression. His "high percentage" solution

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