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Mainspring Gauge
Mainspring gauges were used to measure the sizes of watch mainsprings so that replacement springs could be ordered from a supply house. Mainsprings are characterised by their ''strength'' (thickness) and ''height'' (width). European gauges They were made by several European companies and are all similar to the gauge in Figure 1, being brass plates with notches on both edges and round sinks on both sides. The height of a spring is measured by finding the smallest notch on the edge of the gauge into which it will fit. The strength is determined by finding the smallest round sink into which the mainspring barrel (horology) will fit. (The diameter of the barrel is related to the mainspring length and strength, but this method for determining strength only works for springs of standard lengths.) Each manufacturer used a different arbitrary ''scale'' to describe mainspring ''sizes'', but these sizes are usually based on the French inch. A better method for measuring strength is to us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mainspring
A mainspring is a spiral torsion spring of metal ribbon—commonly spring steel—used as a power source in mechanical watches, some clocks, and other clockwork mechanisms. ''Winding'' the timepiece, by turning a knob or key, stores energy in the mainspring by twisting the spiral tighter. The force of the mainspring then turns the clock's wheels as it unwinds, until the next winding is needed. The adjectives wind-up and spring-powered refer to mechanisms powered by mainsprings, which also include kitchen timers, metronomes, music boxes, wind-up toys and clockwork radios. Modern mainsprings A modern watch mainspring is a long strip of hardened and blued steel, or specialised steel alloy, 20–30 cm long and 0.05-0.2 mm thick. The mainspring in the common 1-day movement is calculated to enable the watch to run for 36 to 40 hours, i.e. 24 hours between daily windings with a power-reserve of 12 to 16 hours, in case the owner is late winding the watch. This is the nor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watch Mainspring Gauge Martin
A watch is a portable timepiece intended to be carried or worn by a person. It is designed to keep a consistent movement despite the motions caused by the person's activities. A wristwatch is designed to be worn around the wrist, attached by a watch strap or other type of bracelet, including metal bands, leather straps or any other kind of bracelet. A pocket watch is designed for a person to carry in a pocket, often attached to a chain. Watches were developed in the 17th century from spring-powered clocks, which appeared as early as the 14th century. During most of its history the watch was a mechanical device, driven by clockwork, powered by winding a mainspring, and keeping time with an oscillating balance wheel. These are called '' mechanical watches''. In the 1960s the electronic ''quartz watch'' was invented, which was powered by a battery and kept time with a vibrating quartz crystal. By the 1980s the quartz watch had taken over most of the market from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barrel (horology)
{{unreferenced, date=September 2009 Used in mechanical watches and clocks, a barrel is a cylindrical metal box closed by a cover, with a ring of gear teeth around it, containing a spiral spring called the mainspring, which provides power to run the timepiece. The barrel turns on an arbor (axle). The spring is hooked to the barrel at its outer end and to the arbor at its inner end. The barrel teeth engage the first pinion of the wheel train of the watch, usually the center wheel. Barrels rotate slowly: for a watch mainspring barrel, the rate is usually one rotation every 8 hours. This construction allows the mainspring to be wound (by turning the arbour) without interrupting the tension of the spring driving the timepiece. Types ; Plain barrel: I.e. without teeth, used in fusee watches and clocks. A chain, or cord, was wound around the plain barrel, connecting it to the fusee. ; Going barrel: The form used in modern watches, is wound by turning the arbor and drives the watch m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watch Mainspring Slit Gauge Martin
A watch is a portable timepiece intended to be carried or worn by a person. It is designed to keep a consistent movement despite the motions caused by the person's activities. A wristwatch is designed to be worn around the wrist, attached by a watch strap or other type of bracelet, including metal bands, leather straps or any other kind of bracelet. A pocket watch is designed for a person to carry in a pocket, often attached to a chain. Watches were developed in the 17th century from spring-powered clocks, which appeared as early as the 14th century. During most of its history the watch was a mechanical device, driven by clockwork, powered by winding a mainspring, and keeping time with an oscillating balance wheel. These are called '' mechanical watches''. In the 1960s the electronic ''quartz watch'' was invented, which was powered by a battery and kept time with a vibrating quartz crystal. By the 1980s the quartz watch had taken over most of the market from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slit Gauge
Slit may refer to: * Slit (protein), in genetics, the midline repellent signaling molecule * Slitting, a shearing operation that cuts a large roll of material into narrower rolls * Slit trench, a defensive fighting position in warfare * Slit Woods, a Site of Special Scientific Interest in County Durham, England * Sublingual immunotherapy or SLIT, immunotherapy that involves putting allergen extracts under the tongue * Arrowslit or loophole, a defensive slot in the wall of a building that allows archers to fire at invaders if the building is threatened * Slang for the pudendal cleft of the vulva See also * * * ''Caso Degollados'' (English: slit-throat case), a Chilean politically motivated series of murders * Slat (other) * Slot (other) * Slut (other) Slut is a pejorative term for a woman who is deemed sexually promiscuous. Slut or SLUT may also refer to: Music * Slut (band), a German indie rock band * ''Slut'' (EP), an EP by Flesh Volcano * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watch Mainspring Gauge Dennison Combined
A watch is a portable timepiece intended to be carried or worn by a person. It is designed to keep a consistent movement despite the motions caused by the person's activities. A wristwatch is designed to be worn around the wrist, attached by a watch strap or other type of bracelet, including metal bands, leather straps or any other kind of bracelet. A pocket watch is designed for a person to carry in a pocket, often attached to a chain. Watches were developed in the 17th century from spring-powered clocks, which appeared as early as the 14th century. During most of its history the watch was a mechanical device, driven by clockwork, powered by winding a mainspring, and keeping time with an oscillating balance wheel. These are called '' mechanical watches''. In the 1960s the electronic ''quartz watch'' was invented, which was powered by a battery and kept time with a vibrating quartz crystal. By the 1980s the quartz watch had taken over most of the market from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aaron Lufkin Dennison
Aaron Lufkin Dennison (March 6, 1812 – January 9, 1895) was an American watchmaker and businessman who founded a number of companies. Early life Dennison was born in Freeport, Maine, after which the family moved to Brunswick, Maine. He was the son of Andrew Dennison, a boot and shoemaker who was also a music teacher. As a child, Aaron earned pocket money by carrying a builder’s hod, working as a herdsman, and as a clerk to a businessman. Later he cut and sold wood and then worked for his father in the cobbler’s shop until the age of 18. While there, he suggested the making of shoes in batches rather than one by one.Priestley, Philip: ''Aaron Lufkin Dennison, an industrial pioneer and his legacy'', NAWCC, 2010. Training in watchmaking In 1830, at the age of 18, Aaron was apprenticed to a Brunswick clockmaker, James Cary. During his apprenticeship, he is said to have made an automatic machine for cutting clock wheels, however in his autobiography he merely says he wanted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watch Mainspring Gauge Dennison
A watch is a portable timepiece intended to be carried or worn by a person. It is designed to keep a consistent movement despite the motions caused by the person's activities. A wristwatch is designed to be worn around the wrist, attached by a watch strap or other type of bracelet, including metal bands, leather straps or any other kind of bracelet. A pocket watch is designed for a person to carry in a pocket, often attached to a chain. Watches were developed in the 17th century from spring-powered clocks, which appeared as early as the 14th century. During most of its history the watch was a mechanical device, driven by clockwork, powered by winding a mainspring, and keeping time with an oscillating balance wheel. These are called '' mechanical watches''. In the 1960s the electronic ''quartz watch'' was invented, which was powered by a battery and kept time with a vibrating quartz crystal. By the 1980s the quartz watch had taken over most of the market from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
