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Thunderbolt (siren)
The Thunderbolt is a discontinued mechanical outdoor warning siren made by Federal Signal Corporation. It has a very recognizable design, being a unidirectional siren with a large yellow (or other color based on buyer's choice) exponential horn. History The Thunderbolt siren was developed between 1949 and 1952. It was the first "supercharged" siren, which uses a supercharger to force air into the rotor, greatly increasing the siren's volume. In the 1980s, when civil defense fell into disuse, thunderbolts across the United States were repurposed for nuclear and storm warning siren systems. During the Gulf War, Federal sent a number of modified Thunderbolt 1003s to Kuwait to warn its citizens of an air raid. These were the system 7000 series and were only found in Kuwait. Later, Kuwait's sirens were all replaced with Federal Signal Modulators. One system 7000 is on display next to a Federal Signal Modulator at the Kuwait General Administration of Civil Defense. in Kuwait City, Kuw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Signal Thunderbolt 1003 Head
Federal or foederal (archaic) may refer to: Politics General *Federal monarchy, a federation of monarchies *Federation, or ''Federal state'' (federal system), a type of government characterized by both a central (federal) government and states or regional governments that are partially self-governing; a union of states *Federal republic, a federation which is a republic *Federalism, a political philosophy *Federalist, a political belief or member of a political grouping *Federalization, implementation of federalism Particular governments *Federal government of the United States **United States federal law **United States federal courts *Government of Argentina *Government of Australia *Government of Pakistan *Federal government of Brazil *Government of Canada *Government of India *Federal government of Mexico * Federal government of Nigeria *Government of Russia *Government of South Africa *Government of Philippines Other *''The Federalist Papers'', critical early arguments in fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Civil Defense Siren
A civil defense siren, also known as an air-raid siren or tornado siren, is a siren used to provide an emergency population warning to the general population of approaching danger. It is sometimes sounded again to indicate the danger has passed. Some sirens, especially within small towns, are also used to call the volunteer fire department when needed. Initially designed to warn city dwellers of air raids in World War II, they were later used to warn of nuclear attack and natural destructive weather patterns, such as tornadoes. The generalized nature of sirens led to many of them being replaced with more specific warnings, such as the broadcast-based Emergency Alert System and the Cell Broadcast-based Wireless Emergency Alerts and EU-Alert mobile technologies. A mechanical siren generates sound by spinning a slotted chopper wheel to interrupt a stream of air at a regular rate. Modern sirens can develop a sound level of up to 135 decibels at . The Chrysler air raid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Signal Corporation
Federal Signal Corporation is an American manufacturer headquartered in Oak Brook, Illinois. Federal Signal manufactures street sweeper vehicles, public address systems, emergency vehicle equipment, and emergency vehicle lighting. The company operates two groups: Federal Signal Environmental Solutions and Federal Signal Safety and Security Systems. Federal Signal Environmental Solutions Group manufactures street sweeper vehicles, sewer cleaner and vacuum loader trucks, hydro excavators, waterblasting equipment, dump truck bodies, and trailers. Federal Signal Safety and Security Systems Group manufactures campus alerting systems, emergency vehicle lighting, emergency sirens, alarm systems, outdoor warning sirens, and public address systems. Currently, the company has 14 manufacturing facilities in 5 different countries. History Federal Signal was founded in Chicago, Illinois, as the Federal Electric Company in 1901 by brothers John and James Gilchrist and partner John Goehs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supercharger
In an internal combustion engine, a supercharger compresses the intake gas, forcing more air into the engine in order to produce more power for a given displacement. The current categorisation is that a supercharger is a form of forced induction that is mechanically powered (usually by a belt from the engine's crankshaft), as opposed to a turbocharger, which is powered by the kinetic energy of the exhaust gasses. However, up until the mid-20th century, a turbocharger was called a "turbosupercharger" and was considered a type of supercharger. The first supercharged engine was built in 1878, with usage in aircraft engines beginning in the 1910s and usage in car engines beginning in the 1920s. In piston engines used by aircraft, supercharging was often used to compensate for the lower air density at high altitudes. Supercharging is less commonly used in the 21st century, as manufacturers have shifted to turbochargers to reduce fuel consumption and/or increase power outputs. Des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Civil Defense
Civil defense ( en, region=gb, civil defence) or civil protection is an effort to protect the citizens of a state (generally non-combatants) from man-made and natural disasters. It uses the principles of emergency operations: prevention, mitigation, preparation, response, or emergency evacuation and recovery. Programs of this sort were initially discussed at least as early as the 1920s and were implemented in some countries during the 1930s as the threat of war and aerial bombardment grew. Civil-defense structures became widespread after authorities recognised the threats posed by nuclear weapons. Since the end of the Cold War, the focus of civil defense has largely shifted from responding to military attack to dealing with emergencies and disasters in general. The new concept is characterised by a number of terms, each of which has its own specific shade of meaning, such as ''crisis management'', '' emergency management'', ''emergency preparedness'', ''contingency planning' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gulf War
The Gulf War was a 1990–1991 armed campaign waged by a 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Iraq were carried out in two key phases: Operation Desert Shield, which marked the military buildup from August 1990 to January 1991; and Operation Desert Storm, which began with the aerial bombing campaign against Iraq on 17 January 1991 and came to a close with the American-led Liberation of Kuwait on 28 February 1991. On 2 August 1990, Iraq invaded the neighbouring State of Kuwait and had fully occupied the country within two days. Initially, Iraq ran the occupied territory under a puppet government known as the "Republic of Kuwait" before proceeding with an outright annexation in which Kuwaiti sovereign territory was split, with the "Saddamiyat al-Mitla' District" being carved out of the country's northern portion and the "Kuwait Governorate" covering the rest. Varying spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuwait
Kuwait (; ar, الكويت ', or ), officially the State of Kuwait ( ar, دولة الكويت '), is a country in Western Asia. It is situated in the northern edge of Eastern Arabia at the tip of the Persian Gulf, bordering Iraq to the north and Saudi Arabia to the south. Kuwait also shares maritime borders with Iran. Kuwait has a coastal length of approximately . Most of the country's population reside in the urban agglomeration of the capital city Kuwait City. , Kuwait has a population of 4.45 million people of which 1.45 million are Kuwaiti citizens while the remaining 3.00 million are foreign nationals from over 100 countries. Historically, most of present-day Kuwait was part of ancient Mesopotamia. Pre-oil Kuwait was a strategic trade port between Mesopotamia, Persia and India. Oil reserves were discovered in commercial quantities in 1938. In 1946, crude oil was exported for the first time. From 1946 to 1982, the country underwent large-scale modernization, largely b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airstrike
An airstrike, air strike or air raid is an offensive operation carried out by aircraft. Air strikes are delivered from aircraft such as blimps, balloons, fighters, heavy bombers, ground attack aircraft, attack helicopters and drones. The official definition includes all sorts of targets, including enemy air targets, but in popular usage the term is usually narrowed to a tactical (small-scale) attack on a ground or naval objective as opposed to a larger, more general attack such as carpet bombing. Weapons used in an airstrike can range from direct-fire aircraft-mounted cannons and machine guns, rockets and air-to-surface missiles, to various types of aerial bombs, glide bombs, cruise missiles, ballistic missiles, and even directed-energy weapons such as laser weapons. In close air support, air strikes are usually controlled by trained observers on the ground for coordination with ground troops and intelligence in a manner derived from artillery tactics. History Beginnings ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Signal Modulator
Federal Signal Modulators (also known as Modulator Speaker Arrays) are electronic warning devices produced by Federal Signal Corporation that are used to alert the public about tornadoes, severe weather, earthquakes, fires, lahars, tsunamis, or any other disaster. They are identified mostly by their distinctive stacked "flying saucer" design. The Modulator II is sold based on the more compact chassis of the siren compared to the original Modulators. General description The modulator is composed of speaker cells (ranging from two to eight, with the exception of seven) that contain four speaker drivers per cell, although two models (model 6032 and 6048) had additional drivers available when they were still produced. Modulators have an inactive (dummy) speaker cell on the bottom of the stack that is used to help project sound in all directions. Due to the design of active cells, there would be unbalanced sound distribution without the inactive cell. Modulators that are being made now ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solenoid
upright=1.20, An illustration of a solenoid upright=1.20, Magnetic field created by a seven-loop solenoid (cross-sectional view) described using field lines A solenoid () is a type of electromagnet formed by a helix, helical coil of wire whose length is substantially greater than its diameter, which generates a controlled magnetic field. The coil can produce a uniform magnetic field in a volume of space when an electric current is passed through it. The term ''solenoid'' was coined in 1823 by André-Marie Ampère. The helical coil of a solenoid does not necessarily need to revolve around a straight-line axis; for example, William Sturgeon's electromagnet of 1824 consisted of a solenoid bent into a horseshoe shape (not unlike an arc spring). Solenoids provide magnetic focusing of electrons in vacuums, notably in television camera tubes such as vidicons and image orthicons. Electrons take helical paths within the magnetic field. These solenoids, focus coils, surround nearly th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Paul, Nebraska
St. Paul is a city in and the county seat of Howard County, Nebraska, United States. The population was 2,290 at the 2010 census. St. Paul is part of the Grand Island, Nebraska Micropolitan Statistical Area. Geography St. Paul is located at (41.213709, -98.459881). According to the United States Census Bureau, the city has a total area of , all land. Climate Demographics 2010 census As of the census of 2010, there were 2,290 people, 989 households, and 590 families residing in the city. The population density was . There were 1,093 housing units at an average density of . The racial makeup of the city was 98.1% White, 0.3% African American, 0.1% Native American, 0.1% Asian, and 1.3% from two or more races. Hispanic or Latino of any race were 1.4% of the population. There were 989 households, of which 29.4% had children under the age of 18 living with them, 47.3% were married couples living together, 9.2% had a female householder with no husband present, 3.1% had a mal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Park, Illinois
University Park is a village, a south suburb of Chicago mostly in Will County with a small portion in Cook County in the U.S. state of Illinois. The village is one of the region's few planned communities, was developed in the 1960s as Wood Hill, then Park Forest South, and finally University Park. Governors State University was established in the village in 1969. The village population was 7,145 at the 2020 census. History In the late 1950s, Woodhill Enterprises purchased land south of Park Forest for a large subdivision. Building began in 1961, but by 1967 Wood Hill had only 240 homes. Residents created a homeowners association, which fostered a community identity. In 1966, Nathan Manilow, one of the developers of Park Forest, started to purchase land around Wood Hill. Park Forest had been a model for planning in the 1940s, and Lewis Manilow, son of Nathan, formed New Community Enterprises (NCE) to build "a whole new town". Major partners included Illinois Central Industries ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
