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Police Lock
A police lock is a type of high-security door lock. There are two distinct kinds of police lock. Overview The first is floor-mounted. It consists of a steel bar running on at a roughly 45° angle from the center of the door to the floor, on the inside of the area to be secured. At each end of the bar are slots or fixtures (one in the door, one in the floor) into which the steel bar is secured. This was designed by Emiel Fox (born 1869 or 1870, died 1941). Patents relating to early versions of the lock go back to at least 1907. Fox set up the Fox Police Lock Company in New York City to manufacture the locks under the brand name Police Lock; other companies have made similar locks under the same designation, so the term has become genericized to a degree. The name comes from the police procedure for securing a damaged door, which uses a similarly angled piece of sturdy wood nailed in place. This type of police lock provides considerable security since it is even harder to break with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Door
A door is a hinged or otherwise movable barrier that allows ingress (entry) into and egress (exit) from an enclosure. The created opening in the wall is a ''doorway'' or ''portal''. A door's essential and primary purpose is to provide security by controlling access to the doorway (portal). Conventionally, it is a panel that fits into the doorway of a building, room, or vehicle. Doors are generally made of a material suited to the door's task. They are commonly attached by hinges, but can move by other means, such as slides or counterbalancing. The door may be able to move in various ways (at angles away from the doorway/portal, by sliding on a plane parallel to the frame, by folding in angles on a parallel plane, or by spinning along an axis at the center of the frame) to allow or prevent ingress or egress. In most cases, a door's interior matches its exterior side. But in other cases (e.g., a vehicle door) the two sides are radically different. Many doors incorporate lockin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lock (security Device)
A lock is a mechanical or electronic fastening device that is released by a physical object (such as a key, keycard, fingerprint, RFID card, security token or coin), by supplying secret information (such as a number or letter permutation or password), by a combination thereof, or it may only be able to be opened from one side, such as a door chain. A key is a device that is used to operate a lock (to lock or unlock it). A typical key is a small piece of metal consisting of two parts: the ''bit'' or ''blade'', which slides into the keyway of the lock and distinguishes between different keys, and the ''bow'', which is left protruding so that torque can be applied by the user. In its simplest implementation, a key operates one lock or set of locks that are keyed alike, a lock/key system where each similarly keyed lock requires the same, unique key. The key serves as a security token for access to the locked area; locks are meant to only allow persons having the correct key ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floor Mounted Police Lock Schematic
A floor is the bottom surface of a room or vehicle. Floors vary from simple dirt in a cave to many layered surfaces made with modern technology. Floors may be stone, wood, bamboo, metal or any other material that can support the expected load. The levels of a building are often referred to as floors, although a more proper term is storey. Floors typically consist of a subfloor for support and a floor covering used to give a good walking surface. In modern buildings the subfloor often has electrical wiring, plumbing, and other services built in. As floors must meet many needs, some essential to safety, floors are built to strict building codes in some regions. Special floor structures Where a special floor structure like a floating floor is laid upon another floor, both may be called subfloors. Special floor structures are used for a number of purposes: * Balcony, a platform projecting from a wall * Floating floor, normally for noise or vibration reduction * Glass floo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York City
New York, often called New York City or NYC, is the most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the most densely populated major city in the United States, and is more than twice as populous as second-place Los Angeles. New York City lies at the southern tip of New York State, and constitutes the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the world by urban landmass. With over 20.1 million people in its metropolitan statistical area and 23.5 million in its combined statistical area as of 2020, New York is one of the world's most populous megacities, and over 58 million people live within of the city. New York City is a global cultural, financial, entertainment, and media center with a significant influence on commerce, health care and life sciences, research, technology, educa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deadbolt
A dead bolt, deadbolt or dead lock is a locking mechanism distinct from a spring bolt lock because a deadbolt can only be opened by a key or handle. The more common spring bolt lock uses a spring to hold the bolt in place, allowing retraction by applying force to the bolt itself. A deadbolt can therefore make a door more resistant to entry without the correct key, as well as make the door more resistant to forced entry. A deadbolt is often used to complement a spring-bolt lock on an entry door to a building. Common types A deadlock, if it is cylinder operated, may be either single cylinder or double cylinder. A single cylinder deadlock will accept a key on one side of the lock, but is operated by a twist knob on the other side. Double cylinder locks will accept a key on both sides and therefore do not require (and often do not have) any twist knob. This prevents unwanted unlocking of the door by forced access to the interior twist knob (via a nearby window, for example). Do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crossbar Police Lock - Schematic
Crossbar may refer to: Structures * Latch (hardware), a post barring a door * Top tube of a bicycle frame * Crossbar, the horizontal member of various sports goals * Crossbar, a horizontal member of an electricity pylon Other * In electronics, crossbar switch In electronics and telecommunications, a crossbar switch (cross-point switch, matrix switch) is a collection of switches arranged in a matrix configuration. A crossbar switch has multiple input and output lines that form a crossed pattern of int ..., a switch connecting multiple inputs to multiple outputs in a matrix manner * In typeface anatomy, ''crossbar'' refers to some types of horizontal strokes * Crossbar (computer hardware manufacturer), a company manufacturing resistive random-access memory * Crossbar (film), a 1979 Canadian television film {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doorframe
A door is a hinged or otherwise movable barrier that allows ingress (entry) into and egress (exit) from an enclosure. The created opening in the wall is a ''doorway'' or ''portal''. A door's essential and primary purpose is to provide security by controlling access to the doorway (portal). Conventionally, it is a panel that fits into the doorway of a building, room, or vehicle. Doors are generally made of a material suited to the door's task. They are commonly attached by hinges, but can move by other means, such as slides or counterbalancing. The door may be able to move in various ways (at angles away from the doorway/portal, by sliding on a plane parallel to the frame, by folding in angles on a parallel plane, or by spinning along an axis at the center of the frame) to allow or prevent ingress or egress. In most cases, a door's interior matches its exterior side. But in other cases (e.g., a vehicle door) the two sides are radically different. Many doors incorporate lock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's List of countries and dependencies by population, most populous country, with a Population of China, population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and Borders of China, borders fourteen countries by land, the List of countries and territories by land borders, most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third List of countries and dependencies by area, largest country by total land area. The country consists of 22 provinces of China, provinces, five autonomous regions of China, autonomous regions, four direct-administered municipalities of China, municipalities, and two special administrative regions of China, Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the List of cities in China by population, most populous cit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Locks (security Device)
Lock(s) may refer to: Common meanings * Lock and key, a mechanical device used to secure items of importance * Lock (water navigation), a device for boats to transit between different levels of water, as in a canal Arts and entertainment * ''Lock'' (film), a 2016 Punjabi film * Lock (''Saga of the Skolian Empire''), a sentient machine in the novels by Catherine Asaro *Lock (waltz), a dance figure * ''Locked'' (miniseries), Indian web miniseries * ''The Lock'' (Constable), an 1824 painting by John Constable * ''The Lock'' (Fragonard) or ''The Bolt'', a 1777 painting by Jean-Honoré Fragonard * ''Locks'' (album), by Garnet Crow, 2008 People * Lock (surname) * Ormer Locklear (1891–1920), American stunt pilot and film actor nicknamed "Lock" *George Locks (1889–1965), English cricketer * Lock Martin (1916–1959), stage name of American actor Joseph Lockard Martin, Jr. Places * Lock, Ohio, an unincorporated community in the United States * Lock, South Australia, a small town in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Inventions ...
The following articles cover the timeline of United States inventions: * Timeline of United States inventions (before 1890), before the turn of the century * Timeline of United States inventions (1890–1945), before World War II * Timeline of United States inventions (1946–1991), for the post-war era * Timeline of United States inventions (after 1991), after the Fall of the Soviet Union {{DEFAULTSORT:Timeline of United States Inventions United States inventions United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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