|
24-hour Analogue Dial
Clocks and watches with a 24-hour analog dial have an hour hand that makes one complete revolution, 360°, in a day (24 hours per revolution). The more familiar 12-hour analog dial has an hour hand that makes two complete revolutions in a day (12 hours per revolution). Twenty-four-hour analog clocks and watches are used today by logistics workers, fire fighters, police officers, paramedics, nurses, pilots, scientists, and the military, and they are sometimes preferred because of the unambiguous representation of a whole day at a time. Note that this definition refers to the use of a complete circular dial to represent a 24-hour day. Using the numbers from 0 to 23 (or 1 to 24) to mark the day is the ''24-hour clock system''. Sundials use 24-hour analog dials—the shadow traces a path that repeats approximately once per day. Many sundials are marked with the double-XII or double-12 system, in which the numbers I to XII (or 1 to 12) are used twice, once for the morning hours ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torre Dell'Orologio (ingrandimento)
This is a list of clock towers by location, including only clock towers based on the following definition: A clock tower is a tower specifically built with one or more (often four) clock faces. Clock towers can be either freestanding or part of a church or municipal building such as a town hall. The mechanism inside the tower is known as a turret clock which often marks the hour (and sometimes segments of an hour) by sounding large bells or chimes, sometimes playing simple musical phrases or tunes. Africa Egypt Kenya Libya *Tripoli, Libya, Tripoli, Ottoman clock tower (1866–70) Nigeria South Africa Tanzania * Clock tower in Arusha Tunisia Americas Argentina * Torre Ader, Buenos Aires * Torre Monumental, Buenos Aires Aruba * Willem III Tower at Fort Zoutman, Oranjestad, Aruba, Oranjestad Barbados * Parliament of Barbados, Bridgetown Brazil Alagoas * Piranhas, Alagoas#Leisure, Torre do Relógio, Piranhas, Alagoas, Piranhas Amapá * :pt:Marco Zero (Macap� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sidereal Time
Sidereal time ("sidereal" pronounced ) is a system of timekeeping used especially by astronomers. Using sidereal time and the celestial coordinate system, it is easy to locate the positions of celestial objects in the night sky. Sidereal time is a "time scale that is based on Earth's rate of rotation measured relative to the fixed stars". A sidereal day (also known as the sidereal rotation period) represents the time for one rotation about the planet axis relative to the stars. Viewed from the same location, a star seen at one position in the sky will be seen at the same position on another night at the same time of day (or night), if the day is defined as a sidereal day. This is similar to how the time kept by a sundial (Solar time) can be used to find the location of the Sun. Just as the Sun and Moon appear to rise in the east and set in the west due to the rotation of Earth, so do the stars. Both solar time and sidereal time make use of the regularity of Earth's rot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pan-Am
Pan American World Airways, originally founded as Pan American Airways and more commonly known as Pan Am, was an airline that was the principal and largest international air carrier and unofficial overseas flag carrier of the United States for much of the 20th century. The first airline to fly worldwide, it pioneered innovations such as jumbo jets and computerized reservation systems, and introduced the first American jetliner in 1958. Until its dissolution on December 4, 1991, Pan Am "epitomized the luxury and glamour of intercontinental travel", and it remains a cultural icon of the 20th century, identified by its blue globe logo ("The Blue Meatball"), the use of the word "Clipper" in its aircraft names and call signs, and the white uniform caps of its pilots. Founded in 1927 by two U.S. Army Air Corps majors, Pan Am began as a scheduled airmail and passenger service flying between Key West, Florida, and Havana, Cuba. In the 1930s, under the leadership of American entrepr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolex GMT Master
The Rolex Oyster Perpetual Date GMT Master is part of the Rolex Professional Watch Collection. Designed in collaboration with the now defunct U.S.-based Pan Am airline for use by their pilots and navigators, it was launched in 1954. History The Rolex GMT-Master wristwatch was originally designed in collaboration with the Pan American Airways and issued by the airline to their crews on long-haul flights. ("GMT" in the name stands for Greenwich Mean Time, which was later replaced by Coordinated Universal Time (UTC), though the watch kept its name). The original GMT Master watch has a 24-hour display fourth hand complication directly linked to and displaying the same time zone as the standard 12-hour hand. This GMT hand enabled the crews to set the watch to GMT or another time zone, and, using the rotatable 24-hour scale bezel, set to the correct offset, a second time zone could be read. GMT or UTC is the time zone that is required for all aviation planning, weather forecasts, sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilot Watch
A watch is a timepiece carried or worn by a person. It is designed to maintain a consistent movement despite the motions caused by the person's activities. A wristwatch is worn around the wrist, attached by a watch strap or another type of bracelet, including metal bands or leather straps. A pocket watch is carried in a pocket, often attached to a chain. A stopwatch is a type of watch that measures intervals of time. During most of their history, beginning in the 16th century, watches were mechanical devices, driven by clockwork, powered by winding a mainspring, and keeping time with an oscillating balance wheel. These are known as ''mechanical watches''. In the 1960s the electronic ''quartz watch'' was invented, powered by a battery and keeping time with a vibrating quartz crystal. By the 1980s it had taken over most of the watch market, in what became known as the quartz revolution (or the quartz crisis in Switzerland, whose renowned watch industry it decimated). In th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenwich Mean Time
Greenwich Mean Time (GMT) is the local mean time at the Royal Observatory, Greenwich, Royal Observatory in Greenwich, London, counted from midnight. At different times in the past, it has been calculated in different ways, including being calculated from noon; as a consequence, it cannot be used to specify a particular time unless a context is given. The term "GMT" is also used as Western European Time, one of the names for the time zone UTC+00:00 and, in UK law, is the basis for civil time in the United Kingdom. Because of Earth's uneven angular velocity in its Elliptic orbit, elliptical orbit and its axial tilt, noon (12:00:00) GMT is rarely the exact moment the Sun crosses the Prime meridian (Greenwich), Greenwich Meridian and reaches its highest point in the sky there. This event may occur up to 16 minutes before or after noon GMT, a discrepancy described by the equation of time. Noon GMT is the annual average (the arithmetic mean) moment of this event, which accounts f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clock Face
A clock face is the part of an analog clock (or watch) that displays time through the use of a flat dial (measurement), dial with reference marks, and revolving pointers turning on concentric shafts at the center, called hands. In its most basic, globally recognized form, the periphery of the dial is numbered 1 through 12 indicating the hours in a 12-hour cycle, and a short hour hand makes two revolutions in a day. A long minute hand makes one turn (geometry), revolution every hour. The face may also include a ''second hand'', which makes one revolution per minute. The term is less commonly used for the time display on digital clocks and digital watch, watches. A second type of clock face is the 24-hour analog dial, widely used in military and other organizations that use 24-hour clock, 24-hour time. This is similar to the 12-hour dial above, except it has hours numbered 1–24 (or 0–23) around the outside, and the hour hand makes only one revolution per day. Some special-p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time Zones
Time is the continuous progression of existence that occurs in an apparently irreversible succession from the past, through the present, and into the future. It is a component quantity of various measurements used to sequence events, to compare the duration of events (or the intervals between them), and to quantify rates of change of quantities in material reality or in the conscious experience. Time is often referred to as a fourth dimension, along with three spatial dimensions. Time is one of the seven fundamental physical quantities in both the International System of Units (SI) and International System of Quantities. The SI base unit of time is the second, which is defined by measuring the electronic transition frequency of caesium atoms. General relativity is the primary framework for understanding how spacetime works. Through advances in both theoretical and experimental investigations of spacetime, it has been shown that time can be distorted and dilated, particula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swatch
Swatch is a Swiss watch company founded in 1983 by Ernst Thomke, Elmar Mock, and Jacques Müller. It is a subsidiary of The Swatch Group. The Swatch product line was developed as a response to the "quartz crisis" of the 1970s and 1980s, in which inexpensive, battery-powered, quartz-regulated watches were competing against more established European watchmakers focused on artisanal craftsmanship producing mostly mechanical watches. The name Swatch is a contraction of "second watch," its concept of "low-cost, high-tech, artistic and emotional" watches marketed as casual, disposable accessories. History Swatch began development in the early 1980s under the leadership of the then ETA SA's CEO Ernst Thomke with a small team of watch engineers led by Elmar Mock and Jacques Müller. Conceived as a standard timekeeper in plastic, Franz Sprecher, a marketing consultant hired by Thomke to give the project an outsider's consideration, sought to create a fashionable line of watches. Sw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poljot
Poljot (, literally meaning "flight"), is a brand of Soviet/Russian wristwatches, produced since 1964 by the First Moscow Watch Factory (, ''Perviy Moskovskiy Chasovoy Zavod''). The flagship brand of the USSR's watch industry, Poljot produced numerous historical watches used in many important space missions, including the world's first space watch worn by Yuri Gagarin. History Founded in 1930 under orders from Joseph Stalin, the First State Watch Factory () was the first large scale Soviet watch and mechanical movement manufacturer. Via its USA-based trading company Amtorg, the Soviet government bought the defunct Ansonia Clock Company of Brooklyn, New York in 1929, and the Dueber-Hampden Watch Company of Canton, Ohio. As part of the Soviet's first five-year plan, twenty-eight freight cars worth of machinery and parts were moved from the USA to Moscow in order to establish the factory; further, twenty-one former Dueber-Hampden technicians trained Russian workers in the art of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fortis Uhren AG
FORTIS Watches AG (formerly FORTIS Uhren AG), located in Grenchen is a luxury Swiss watches manufacturer that was founded by Walter Vogt in 1912. The brand is particularly known for robust, highly precise, automatic tool watches. The owner and CEO of Fortis is Jupp Philipp. History Fortis was founded by Walter Vogt in 1912. Twelve years after its establishment, Vogt set up production with John Harwood, inventor of the automatic wristwatch. In 1926, Fortis released the patented Harwood Automatic, the first self-winding wristwatch, at Baselworld. In 1937, Fortis commemorated the company's 25th anniversary by manufacturing and marketing its first chronographs, including the Rolls and the Autorist. The Autorist was also designed by John Harwood and used the movement of the strap to power the watch. By 1943, Fortis introduced some of the world's first waterproof watches with the Fortissimo models. In 1962 the Spacematic automatic was constructed to hold up in extreme conditi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vostok Watches
Vostok Watch Makers, Inc. (; literally meaning "East") is a Russian watch brand and manufacturer based in Chistopol, Tatarstan, Russia. The company produces mainly ruggedized mechanical watches, namely the ''Komandirskie'' and ''Amfibia'' models. It also makes clocks and watch movements for other watch brands. History The Vostok Watch Makers company was founded in 1942 when one of the Moscow watch-making plants of the Poljot, First Moscow Watch Factory was evacuated to Chistopol, a small town located on the Kama River in Tatarstan.''International Watch'' magazine, Nov. 2006, pg. 187 Only defence equipment was produced during the war years, but as soon as the war was over, the company started making mechanical wristwatches. In 2006, Vostok Watch Makers began marketing another line of watches branded "Amphibia". Despite the introduction of the new lines of ''Komandirskie'' and ''Amphibia'', the "classic" models (mostly designed in the 1960s and 1970s) of these lines were still in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
