Jeremy Thacker was an 18th-century writer and watchmaker (although see the important qualification under 'Hoax?' below), who for a long time was believed to be the first to have coined the word "chronometer" for precise clocks designed to find longitude at sea, though an earlier reference by William Derham has now been found. Thacker is credited with writing The Longitudes Examin'd, published in London in 1714, in which the term 'chronometer' appears. In the work, the claim is made that Thacker created and extensively tested a marine chronometer positioned on gimbals and within a vacuum, and that sea trials would take place. It has been concluded by others that such tests must have resulted in failure. The idea of a vacuum for a marine clock had already been proposed by the Italian clockma
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| - Jeremy Thacker va ser un escriptor i rellotger del segle XVIII, que va encunyar la paraula cronòmetre per a designar un tipus de rellotges precisos dissenyats per poder calcular la longitud geogràfica en el mar. Ell mateix va crear un cronòmetre marí col·locat sobre una suspensió cardan i dins d'una campana de buit, però va ser un fracàs. La idea de mantenir el rellotge en el buit per a un rellotge marí ja havia estat proposada pel rellotger italià Antonio Tempora el 1668. Poc temps després, el rellotger britànic John Harrison construiria els seus reeixits cronòmetres marins a partir de 1730, encara que fins al quart (el portat per Cook al 2n i 3r viatges a Austràlia) no obtindria el premi màxim atorgat pel Board of longitudes. (ca)
- Jeremy Thacker was an 18th-century writer and watchmaker (although see the important qualification under 'Hoax?' below), who for a long time was believed to be the first to have coined the word "chronometer" for precise clocks designed to find longitude at sea, though an earlier reference by William Derham has now been found. Thacker is credited with writing The Longitudes Examin'd, published in London in 1714, in which the term 'chronometer' appears. In the work, the claim is made that Thacker created and extensively tested a marine chronometer positioned on gimbals and within a vacuum, and that sea trials would take place. It has been concluded by others that such tests must have resulted in failure. The idea of a vacuum for a marine clock had already been proposed by the Italian clockma (en)
- Jeremy Thacker fue un escritor y relojero del siglo XVIII, quien acuñó la palabra cronómetro para designar a un tipo de relojes precisos diseñados para encontrar la longitud geográfica en el mar. Él mismo creó un cronómetro marino colocado sobre una suspensión Cardán y dentro de una campana de vacío, pero fue un fracaso. La idea de mantener el reloj marino en el vacío ya había sido propuesta por el relojero italiano Antonio Tempora en 1668. Poco tiempo después, el relojero británico John Harrison construiría sus exitosos cronómetros marinos a partir de 1730. (es)
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| - Jeremy Thacker va ser un escriptor i rellotger del segle XVIII, que va encunyar la paraula cronòmetre per a designar un tipus de rellotges precisos dissenyats per poder calcular la longitud geogràfica en el mar. Ell mateix va crear un cronòmetre marí col·locat sobre una suspensió cardan i dins d'una campana de buit, però va ser un fracàs. La idea de mantenir el rellotge en el buit per a un rellotge marí ja havia estat proposada pel rellotger italià Antonio Tempora el 1668. Poc temps després, el rellotger britànic John Harrison construiria els seus reeixits cronòmetres marins a partir de 1730, encara que fins al quart (el portat per Cook al 2n i 3r viatges a Austràlia) no obtindria el premi màxim atorgat pel Board of longitudes. Va escriure "The Longituds Examined" (Les Longituds Examinades) en 1714. (ca)
- Jeremy Thacker fue un escritor y relojero del siglo XVIII, quien acuñó la palabra cronómetro para designar a un tipo de relojes precisos diseñados para encontrar la longitud geográfica en el mar. Él mismo creó un cronómetro marino colocado sobre una suspensión Cardán y dentro de una campana de vacío, pero fue un fracaso. La idea de mantener el reloj marino en el vacío ya había sido propuesta por el relojero italiano Antonio Tempora en 1668. Poco tiempo después, el relojero británico John Harrison construiría sus exitosos cronómetros marinos a partir de 1730. Escribió "The Longitudes Examined" (Las Longitudes Examinadas) en 1714. (es)
- Jeremy Thacker was an 18th-century writer and watchmaker (although see the important qualification under 'Hoax?' below), who for a long time was believed to be the first to have coined the word "chronometer" for precise clocks designed to find longitude at sea, though an earlier reference by William Derham has now been found. Thacker is credited with writing The Longitudes Examin'd, published in London in 1714, in which the term 'chronometer' appears. In the work, the claim is made that Thacker created and extensively tested a marine chronometer positioned on gimbals and within a vacuum, and that sea trials would take place. It has been concluded by others that such tests must have resulted in failure. The idea of a vacuum for a marine clock had already been proposed by the Italian clockmaker Antimo Tempera in 1668. Slightly later, John Harrison would successfully build marine timekeepers from 1730. (en)
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