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Salford Electrical Instruments
Salford Electrical Instruments Ltd (SEI; colloquially: Salford Elec) was a British manufacturer of electrical measurement and testing instruments based in Salford, England. Closely tied to the General Electric Company (GEC) conglomerate, the company was well-established in the electrical equipment industry in the United Kingdom in the 20th century. History In 1910, the measuring instrument, meter department of GEC was incorporated separately as Salford Electrical Instruments Ltd, a subsidiary company employing 1,000 workers. Since 1905 the department had been based at Bow Street Works, a small two-storey building at the rear of GEC's large Peel Works on Silk Street. In around 1921 it expanded to fill the whole Peel Works, after the departure of GEC's Peel-Conner Telephone Works to Coventry, and the extension of the site to accommodate a new factory. SEI's managing director, Henry Cobden Turner, is known for his work on the radio proximity fuse, an important innovation during t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Electric Company
The General Electric Company (GEC) was a major British industrial conglomerate involved in consumer and Arms industry, defence electronics, communications, and engineering. It was originally founded in 1886 as G. Binswanger and Company as an electrical goods wholesaler based in London. It quickly adopted a then-unorthodox business model of supplying electrical components over the counter. In 1889, the business was incorporated as the General Electric Company Ltd, and became a public limited company 11 years later. During the 1890s and 1900s, the company heavily invested into electric lighting, a sector that proved to be immensely profitable in the long term. The GEC was heavily impacted by the outbreak of the First World War, supplying various goods to the military, and thus becoming a major player in the electrical industry. In 1921, a new purpose-built company headquarters (Magnet House) was opened in Kingsway, London; two years later, GEC's industrial research laboratories at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lord Weinstock
Arnold Weinstock, Baron Weinstock, Kt., OMRI, FSS (29 July 1924 – 23 July 2002) was an English industrialist and businessman known for making General Electric Company one of Britain's most profitable companies. The City (London) criticized Weinstock for his financial caution but after he retired as managing director in 1996, under his successor a series of ill-judged acquisitions led to catastrophic losses. Early life Born in Stoke Newington, Hackney, London, the son of working class Polish-Jewish immigrants Golda () and Simon Weinstock, Arnold Weinstock was educated at the London School of Economics. Career He was a junior administrative officer in the Admiralty in the period 1944–1947. In 1949, he married Netta Sobell, the daughter of industrialist Michael Sobell. The couple had two children, Simon (1952–1996) and Susan (b 1955). Lady Weinstock died in 2019. In 1954 he joined his father-in law's electronics company, Radio & Allied Industries Ltd., and in 1963 orche ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1910 Establishments In England
Year 191 ( CXCI) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Apronianus and Bradua (or, less frequently, year 944 ''Ab urbe condita''). The denomination 191 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Parthia * King Vologases IV of Parthia dies after a 44-year reign, and is succeeded by his son Vologases V. China * A coalition of Chinese warlords from the east of Hangu Pass launches a punitive campaign against the warlord Dong Zhuo, who seized control of the central government in 189, and held the figurehead Emperor Xian hostage. After suffering some defeats against the coalition forces, Dong Zhuo forcefully relocates the imperial capital from Luoyang to Chang'an. Before leaving, Dong Zhuo orders his troops to loot the tombs of the Han emperors, and then destroy Luo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viewmaster
View-Master is the trademark name of a line of special-format stereoscopes and corresponding View-Master "reels", which are thin cardboard disks containing seven Stereoscopic 3-D pairs of small transparent color photographs on film.Mary Ann & Wolfgang Sell and Charley Van Pelt, "View-Master Memories" , M.A. and W. Sell, ISBN B0006S314I, 2000 Self-Published It was originally manufactured and sold by Sawyer's. The View-Master system was introduced in 1939, four years after the advent of Kodachrome color film made the use of small, high-quality photographic color images practical. Tourist attraction and travel views predominated in View-Master's early lists of reels, most of which were meant to be of interest to users of all ages. Most current View-Master reels are intended for children. History 1919–1956: early photo services Edwin Eugene Mayer worked as a pharmacist at Owl Drug store in downtown Portland, Oregon, after serving in the U.S. Army in World War I. He built up a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synthetic Sapphire
Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide () with trace amounts of elements such as iron, titanium, cobalt, lead, chromium, vanadium, magnesium, boron, and silicon. The name ''sapphire'' is derived from the Latin word ', itself from the Greek word (), which referred to lapis lazuli. It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors. Red corundum stones also occur, but are called rubies rather than sapphires. Pink-colored corundum may be classified either as ruby or sapphire depending on the locale. Commonly, natural sapphires are cut and polished into gemstones and worn in jewelry. They also may be created synthetically in laboratories for industrial or decorative purposes in large crystal boules. Because of the remarkable hardness of sapphires 9 on the Mohs scale (the third-hardest mineral, after diamond at 10 and moiss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mercury Switch
A mercury switch is an electricity, electrical switch that opens and closes a electrical circuit, circuit when a small amount of the liquid metal mercury (element), mercury connects metal electrodes to close the circuit. There are several different basic designs (tilt, displacement, radial, etc.) but they all share the common design strength of non-eroding switch contacts. The most common is the ''mercury tilt switch''. It is in one state (open or closed) when tilted one direction with respect to horizontal, and the other state when tilted the other direction. This is what older style thermostats used to turn a heater or air conditioner on or off. The ''mercury displacement switch'' uses a 'plunger' that dips into a pool of mercury, raising the level in the container to contact at least one electrode. This design is used in relays in industrial applications that need to switch high current loads frequently. These relays use electromagnetic coils to pull steel sleeves inside her ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermostat
A thermostat is a regulating device component which senses the temperature of a physical system and performs actions so that the system's temperature is maintained near a desired setpoint. Thermostats are used in any device or system that heats or cools to a setpoint temperature. Examples include building heating, central heating, air conditioners, HVAC systems, water heaters, as well as kitchen equipment including ovens and refrigerators and medical and scientific incubators. In scientific literature, these devices are often broadly classified as thermostatically controlled loads (TCLs). Thermostatically controlled loads comprise roughly 50% of the overall electricity demand in the United States. A thermostat operates as a "closed loop" control device, as it seeks to reduce the error between the desired and measured temperatures. Sometimes a thermostat combines both the sensing and control action elements of a controlled system, such as in an automotive thermostat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rectifier
A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The process is known as ''rectification'', since it "straightens" the direction of current. Physically, rectifiers take a number of forms, including Vacuum tube#Diodes, vacuum tube diodes, wet chemical cells, mercury-arc valves, stacks of copper and selenium rectifier, selenium oxide plates, Diode#Semiconductor diodes, semiconductor diodes, silicon-controlled rectifiers and other silicon-based semiconductor switches. Historically, even synchronous electromechanical switches and motor-generator sets have been used. Early radio receivers, called crystal radios, used a "Crystal detector#Cat whisker detector, cat's whisker" of fine wire pressing on a crystal of galena (lead sulfide) to serve as a point-contact rectifier or "crystal detector". Rectifiers have many uses, but are often found serving as component ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toroidal Inductors And Transformers
Toroidal inductors and transformers are inductors and transformers which use magnetic cores with a toroidal (ring or donut) shape. They are passivity (engineering), passive electronic components, consisting of a circular ring or donut shaped magnetic core of ferromagnetic material such as laminated core, laminated iron, iron powder, or Ferrite (magnet), ferrite, around which wire is wound. Although closed-core inductors and transformers often use cores with a rectangular shape, the use of toroidal-shaped cores sometimes provides superior electrical performance. The advantage of the toroidal shape is that, due to its symmetry, the amount of magnetic flux that escapes outside the core (leakage flux) can be made low, potentially making it more efficient and making it emit less electromagnetic interference (EMI). Toroidal inductors and transformers are used in a wide range of electronic circuits: power supply, power supplies, inverters, and amplifiers, which in turn are used in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Core
A magnetic core is a piece of magnetism, magnetic material with a high magnetic permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, electric generator, generators, inductors, loudspeakers, magnetic recording heads, and magnetic assemblies. It is made of ferromagnetic metal such as iron, or ferrimagnetic compounds such as Ferrite (magnet), ferrites. The high permeability, relative to the surrounding air, causes the magnetic field lines to be concentrated in the core material. The magnetic field is often created by a current-carrying coil of wire around the core. The use of a magnetic core can increase the strength of magnetic field in an electromagnetic coil by a factor of several hundred times what it would be without the core. However, magnetic cores have side effects which must be taken into account. In alternating current (AC) devices they cause energy losses, call ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salford Electrical Instruments Tape Recorder (46479601542)
Salford ( ) is a city in Greater Manchester, England, on the western bank of the River Irwell which forms its boundary with Manchester city centre. Landmarks include the former town hall, Salford Cathedral, Salford Lads' Club and St Philip's Church. In 2021 it had a population of 129,794. The demonym for people from Salford is ''Salfordian''. Salford is the main settlement of the wider City of Salford metropolitan borough, which incorporates Eccles, Pendlebury, Swinton and Walkden. Salford was named in the Early Middle Ages, though evidence exists of settlement since Neolithic times. It was the seat of the large Hundred of Salford in the historic county of Lancashire and was granted a market charter in about 1230, which gave it primary cultural and commercial importance in the region.. It was eventually overtaken by Manchester during the Industrial Revolution. The former County Borough of Salford was granted city status in 1926; the current wider borough was established i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
