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Self-winding Watch
An automatic watch, also known as a self-winding watch or simply an automatic, is a mechanical watch where the natural motion of the wearer provides energy to wind the mainspring, making manual winding unnecessary if worn enough. It is distinguished from a ''manual watch'' in that a manual watch must have its mainspring wound by hand at regular intervals. Operation In a mechanical watch the watch's gears are turned by a spiral spring called a mainspring. In a ''manual watch'' energy is stored in the mainspring by turning a knob, the ''crown'' on the side of the watch. Then the energy from the mainspring powers the watch movement until it runs down, requiring the spring to be wound again. A self-winding watch movement has a mechanism which winds the mainspring using the natural motions of the wearer's body. The watch contains an oscillating weight that turns on a pivot. The normal movements of the watch in the user's pocket (for a pocketwatch) or on the user's arm (for a wristwat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Self-winding Wristwatch (transparent Backside)
An automatic watch, also known as a self-winding watch or simply an automatic, is a mechanical watch where the natural motion of the wearer provides energy to wind the mainspring, making manual winding unnecessary if worn enough. It is distinguished from a ''manual watch'' in that a manual watch must have its mainspring wound by hand at regular intervals. Operation In a mechanical watch the watch's gears are turned by a spiral spring called a mainspring. In a ''manual watch'' energy is stored in the mainspring by turning a knob, the ''crown'' on the side of the watch. Then the energy from the mainspring powers the watch movement until it runs down, requiring the spring to be wound again. A self-winding watch movement has a mechanism which winds the mainspring using the natural motions of the wearer's body. The watch contains an oscillating weight that turns on a pivot. The normal movements of the watch in the user's pocket (for a pocketwatch) or on the user's arm (for a wristwat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Remontoire
In mechanical horology, a remontoire (from the French ''remonter'', meaning 'to wind') is a small secondary source of power, a weight or spring, which runs the timekeeping mechanism and is itself periodically rewound by the timepiece's main power source, such as a mainspring. It was used in a few precision clocks and watches to place the source of power closer to the escapement, thereby increasing the accuracy by evening out variations in drive force caused by unevenness of the friction in the geartrain. In spring-driven precision clocks, a gravity remontoire is sometimes used to replace the uneven force delivered by the mainspring running down by the more constant force of gravity acting on a weight. In turret clocks, it serves to separate the large forces needed to drive the hands from the modest forces needed to drive the escapement which keeps the pendulum swinging. A remontoire should not be confused with a ''maintaining power spring'', which is used only to keep the timepiec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CFB A1000
CFB may refer to: *College football *Canadian Forces base, military installation of the Canadian forces * Caminho de Ferro de Benguela, railway in Angola *Carrollton-Farmers Branch Independent School District *Cipher feedback, a block cipher mode in data encryption * Clube de Futebol «Os Belenenses», a football club in Portugal *Continental flood basalt, large volumes of dominantly tholeiitic basalt on continents *Complement factor B, a protein *Compact fluorescent bulb * Current feedback, a type of electronic feedback used in some operational amplifiers *Circulating fluidized bed, a type of fluidized bed used in power plants *Commission fédérale des banques (Swiss Federal Banking Commission) *CFB, the IATA code for Cabo Frio International Airport *CFB, the National Rail station code for Catford Bridge railway station *CFB is acronym for Call Forwarding when Busy telecom service *Circulating fluidized bed combustion *Cfb, one of four symbols for the Oceanic climate under the Köp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ball Bearing
A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races. The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls. In most applications, one race is stationary and the other is attached to the rotating assembly (e.g., a hub or shaft). As one of the bearing races rotates it causes the balls to rotate as well. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were sliding against each other. Ball bearings tend to have lower load capacity for their size than other kinds of rolling-element bearings due to the smaller contact area between the balls and races. However, they can tolerate some misalignment of the inner and outer races. History Although bearings had been developed since ancient times, the first mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jewel Bearing
A jewel bearing is a plain bearing in which a metal spindle turns in a jewel-lined pivot hole. The hole is typically shaped like a torus and is slightly larger than the shaft diameter. The jewels are typically made from the mineral corundum, usually either synthetic sapphire or synthetic ruby. Jewel bearings are used in precision instruments where low friction, long life, and dimensional accuracy are important. Their largest use is in mechanical watches. History Jewel bearings were invented in 1704 for use in watches by Nicolas Fatio de Duillier, Peter Debaufre, and Jacob Debaufre, who received an English patent for the idea. Originally natural jewels were used, such as diamond, sapphire, ruby, and garnet. In 1902, Verneuil process, a process to make synthetic sapphire and ruby (crystalline aluminium oxide, also known as corundum) was invented by Auguste Verneuil, making jewelled bearings much cheaper. Today most jewelled bearings are synthetic ruby or sapphire. Historica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eterna
Eterna is a Swiss luxury watch company founded in Grenchen, Canton Solothurn, on 7 November 1856 by Josef Girard and Urs Schild. The company is now owned by Hong Kong-based Citychamp Watch & Jewellery Group Limited, an investment holding company formerly known as China Haidian Holdings. History On 7 November 1856, Dr. Joseph Girard and Urs Schild, a 28-year-old school teacher, founded the ébauche factory "Dr. Girard & Schild“. Eight years later the enterprise set out the mutual rights and obligations of employees and employers in writing. Urs Schild became a National Councilor in 1882. Six years later, he died at the age of 58. After the death of Urs Schild, his son Max took over the company and soon made a business trip to the United States. He returned to introduce machinery to the craftsmen. Max Schild was ahead of his time and his ideas were unpopular. Discouraged, he left the company and handed power over to his brother Theodore, with whom Eterna entered a prosperous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glycine Watch SA
Glycine Watch SA, or simply Glycine (), is a Swiss watchmaker founded in 1914 in Biel/Bienne, Switzerland, where its manufacturing and headquarters remain today. In 1930, Glycine released the first mass-produced automatic watches, and in 1959, it developed vacuum-sealed cases, allowing for more durable and water-resistant timepieces. The Glycine Airman, the first watch capable of tracking two 24-hour time zones, has been used extensively in commercial and military aviation, as well as in spaceflights; notable examples include its use by United States Air Force pilots during the Vietnam War and astronaut Pete Conrad during the Gemini 5 and Gemini 11 spaceflights. History 1891–1940: Early history Eugène Meylan was born in 1891 in Le Chenit, Switzerland, and attended watchmaking school at School Of Arts Appliqués (''Ecole d'arts appliqués'') in La Chaux-de-Fonds from 1910 to 1911. Meylan was noted to be a gifted student, receiving top rating for a watch he submitted to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolex
Rolex SA () is a British-founded Swiss watch designer and manufacturer based in Geneva, Switzerland. Founded in 1905 as ''Wilsdorf and Davis'' by Hans Wilsdorf and Alfred Davis in London, the company registered ''Rolex'' as the brand name of its watches in 1908 and became ''Rolex Watch Co. Ltd.'' in 1915. After World War I, the company moved its base of operations to Geneva because of the unfavorable economy in the United Kingdom. In 1920, Hans Wilsdorf registered ''Montres Rolex SA'' in Geneva as the new company name (''montre'' is French for wristwatch); it later became ''Rolex SA''. Since 1960, the company has been owned by the Hans Wilsdorf Foundation, a private family trust. Rolex SA and its subsidiary Montres Tudor SA design, make, distribute, and service wristwatches sold under the Rolex and Tudor brands. History Early history Alfred Davis and his brother-in-law Hans Wilsdorf founded ''Wilsdorf and Davis'', the company that would eventually become ''Rolex SA'', in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanics Movement Feinmechanik Wrist Watch Clock Automatic Gmt Master Gmt-932709
Mechanics (from Ancient Greek: μηχανική, ''mēkhanikḗ'', "of machines") is the area of mathematics and physics concerned with the relationships between force, matter, and motion among physical objects. Forces applied to objects result in displacements, or changes of an object's position relative to its environment. Theoretical expositions of this branch of physics has its origins in Ancient Greece, for instance, in the writings of Aristotle and Archimedes (see History of classical mechanics and Timeline of classical mechanics). During the early modern period, scientists such as Galileo, Kepler, Huygens, and Newton laid the foundation for what is now known as classical mechanics. As a branch of classical physics, mechanics deals with bodies that are either at rest or are moving with velocities significantly less than the speed of light. It can also be defined as the physical science that deals with the motion of and forces on bodies not in the quantum realm. His ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Depression
The Great Depression (19291939) was an economic shock that impacted most countries across the world. It was a period of economic depression that became evident after a major fall in stock prices in the United States. The economic contagion began around September and led to the Wall Street stock market crash of October 24 (Black Thursday). It was the longest, deepest, and most widespread depression of the 20th century. Between 1929 and 1932, worldwide gross domestic product (GDP) fell by an estimated 15%. By comparison, worldwide GDP fell by less than 1% from 2008 to 2009 during the Great Recession. Some economies started to recover by the mid-1930s. However, in many countries, the negative effects of the Great Depression lasted until the beginning of World War II. Devastating effects were seen in both rich and poor countries with falling personal income, prices, tax revenues, and profits. International trade fell by more than 50%, unemployment in the U.S. rose to 23% and ... [...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 condition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Harwood (watchmaker)
John Harwood (1893–1964) was a British watchmaker who invented a Automatic watch, self-winding wristwatch. Early life Harwood was born in Bolton, Lancashire. During World War I he served as an armoury staff sergeant, developing an Machine pistol, automatic pistol and a screwdriver whose blade turned on impact. Career After the war he served a watchmaking apprenticeship with Hirst Brothers and Co of Oldham. In 1922 he moved to the Isle of Man to set up his own watch repair business. In 1923, supported by a local businessman, he developed a self-winding wristwatch and applied for a patent in Switzerland, which was granted in September, 1924. His design ensured that the watch could be hermetically sealed against the ingress of water or dust. The hands could be reset by a rotating bezel. After four years, supported by funds from two Manchester brothers, Louis and Philip Alexander, he persuaded Swiss watch manufacturers Anton Schild S.A. and Walter Vogt of Fortis (Swiss watchmake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
