Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

Topic: Marine chronometer

    Note: these results are not from the primary (high quality) database.

Ads by Google

In the News (Mon 28 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

John Bliss chronometer maker In addition to three Bliss chronometers, one from each incarnation of the Bliss companies, I have three taffrail logs and one compass made by John Bliss and Co., and a pair of marine binoculars from 1907. Gould, Rupert T. The Marine Chronometer: Its History and Development. Chronometers are very accurate portable timekeepers developed around 1780, and until very recently were essential for navigation at sea. pages.cthome.net /nobliss/jbliss.html   (975 words)

NMAH: Bond Marine Chronometer To use a marine chronometer, outbound sailors would set their timepieces to the time of a known port's longitude—say Greenwich, England, or Boston. Once at sea, mariners calculated their position east or west of that place by converting the difference in time on the chronometer and local ship time into distance, 15 degrees of longitude for every hour. Chronometers were uncommon aboard American ships at the time, and the Cyrus's captain warned Bond to read the record of the instrument's performance with a critical eye. americanhistory.si.edu /collections/object.cfm?key=35&objkey=155   (305 words)

Chronometer Collection The chronometer collection features Marine Chronometers, Deck Watches and Pocket Chronometers as well as timers and chronographs that were intended for navigational purposes. The Arnold and Son pocket chronometer in the collection is a good if imperfect example of this period when the pioneering work of Harrison with H4 was being reduced to common practice, albeit in different form, by Arnold and Earnshaw with significant support from the English and French horological communities. The detent chronometer escapement has always been the mechanism of choice for a durable precise rate needed for navigation, but it does not allow for adjustment to positions and rough usage required for some military applications. www.awco.org /Chronometers   (271 words)

Poljot 6mx Marine Chronometer, Poljot Desk watch, Russian mechanical stopwatches 6MX marine chronometer was developed by the experts of The 1-st Moscow Watch Factory in 1947 and meant for keeping of exact time in hours, minutes and seconds on ships and vessels of all types. Since then 6MX marine chronometer was exported to many counties such as Germany, Finland, Japan, Italy, USA and other counties. Chronometer is mounted in a wooden case and a box made of special firm sort of wood lacquered into the color of mahogany. www.russianwatch.net /poljot_6mx_marine_chronometer_and_desk_watch.shtml   (525 words)

OMEGA Megaquartz 2400, Marine Chronometer of 1974 The Marine Chronometer that is directly to the left the the sign (w/ ID tag 173) has a case reference (circa 1974) ST 398.0836 with caliber 1511 movement. The other Marine chronometer that is directly to the right of the Prototype has a case ref of ST398.0832 and uses the later caliber 1516 movement (circa 1976). The Marine Chronometer 2.4 Mhz ST 398.0836 with caliber 1511 movement or ST398.0832 and uses the later caliber 1516 movement was price at 1850.00 USD. home.xnet.com /~cmaddox/omega_megaquartz_2400.html   (626 words)

Marine Chronometer Main Page Genuine 2 day marine chronometer with matching numbers and outer carrying case. A very scarce 8 Day mechanical marine chronometer by Thomas Mercer, St. Albans, England. This chronometer is equipped with electrical contacts to operate slave units, a cutaway to the dial... www.bottomoftheharbour.com /chronometermain.html   (363 words)

Evolution of a Design: Ulysse Nardin Marine Chronometer This is problematic, since at bad light (and at sea, the marine chronometer were normally stored well protected in a corner of the rudder house/map room, where it was rather dark), the legibility was seriously compromised. As it will be easily seen, the UN designers did quite a good job in transferring the classic marine chronometer's appearance into a modern wristwatch, that is laid with utmost useability in mind, while at the same time maintaining UN's rich tradition in the field of precision clocks and watches. The marine chronometers had reached a high stage of standardization, their design being used by nearly every maker of these timepieces. www.tp178.com /mh/un_pics/UN_Marine_Design.html   (1099 words)

Ships Chronometer An accurate marine chronometer was recognized as crucial to navigation in the 18th century. www.maritime.org /online-store/scstore/p-X9995.html   (35 words)

Historic Timekeepers Marine Chronometer Services Because parts are not available, replacement parts for all other chronometers are provided at the rates quoted on the Custom Parts Page. Additional parts for Hamilton chronometers are provided at the prices quoted on the Hamilton M21 Replacement Parts Page. It is the bible of chronometers and worth the effort to locate. www.historictimekeepers.com /servicing_of_marine_chronometers.htm   (400 words)

Science News - The Marine Chronometer The marine chronometer or sea clock was the first precise instrument used to figure out distance between two locations. No navigator using the marine chronometer could have an excuse for not locating a charted island or for being wrecked on a charted coastline. The development of accurate timepieces was the result of the invention of the marine chronometer. www.manitobamuseum.ca /sg_marine.html   (632 words)

Marine Chronometer Services Never mind that it is no longer a chronometer, that its rate stability has been destroyed. This will severely impact on the chronometer's stability of rate. Perhaps the most annoying "botches" involve chronometer detents. www.historictimekeepers.com /Rogue_Gallery.htm   (422 words)

Ship's Chronometer Precision clocks are traditionally named "Chronometers." An accurate marine chronometer was recognized as crucial to navigation in the 18th century. In the year 1761, John Harrison's famous "Chronometer #4" was successfully used during a long sea voyage and proved that it was possible to create a time piece that was simultaneously portable and accurate enough for use aboard a ship. In order to reduce positional errors caused by the motion of the ship, chronometers are typically placed within special gimbaled boxes that allow them to remain horizontal at all times. www.nauticaldecorandmore.com /Chronometer.html   (446 words)

Marine Chronometer Inside the marine chronometer is found some of the finest horological craftsmanship. Running a marine chronometer in a dirty or dry state will very quickly lead to severe wear to hardened steel parts. This is a typical example of a late 19th century 2-day marine chronometer. www.clockrestorer.com /chrono.htm   (185 words)

Zenith Marine Chronometer I bought this at a flea market in California in 1970 for $ 8.00 and I am wondering the history on this Chronometer. anyboard.net /rec/WUS/posts/169.html   (23 words)

Marine Chronometer Main Page Genuine 2 day marine chronometer with matching numbers and outer carrying case. Thomas Mercer 2 day marine chronometer fitted in original gimballed timber case. This lovely 2 day marine chronometer by A. www.bottomoftheharbour.com /chronometermain.html   (363 words)

index The German manufacture of marine chronometers and chronometer watches was the result of direct intervention by the German Admiralty under von Tirpitz, the founder of the German Navy. The observatory tests of marine chronometers are based on carefully controlled conditions, the test of a chronometer at war is very different and cannot be simulated. The chronometer watch, formerly known as the deck watch had a lever movement, was adjusted for temperature and in five positions. www.knirim.homepage.t-online.de /chapman.htm   (363 words)

Rating Chronometers The adjuster has to decide which is the more important goal: Temperature compensation (for marine chronometers hung in gimbals) or Position Adjustment (for railroad watches kept at a constant temperature in a pocket). A marine chronometer is constructed and used in such a way that its rate does not swing so wildly over time. When the chronometer is dial up (or down), it is in a position that eliminates errors due to the balance being out of balance (poise). www.historictimekeepers.com /Rating.htm   (363 words)

Database of Ulysse Nardin Watches from About Time 261-77/40 Marine Chronometer 38mm 18K.Yellow 38mm White Laquer Roman Strap 261-88/40 Marine Chronometer 36mm 18K.Yellow 36mm White Laquer Roman Strap 133-88-9/395 San Marco Chronometer 33mm S.Steel 33mm Honey MOP Roman Figs Strap www.abouttime.com /abouttime/ulysse-nardin-models.page.html   (6150 words)

Manchester Engineers included George and Robert Stephenson, Thomas Earnshaw, James Hargreaves and Sir John Bradshaigh Thomas Earnshaw was a pioneer horologist and one of several developers of the marine chronometer. Eventually, Earnshaw's spring detent escapement was awarded £3,000 from the Board of Longitude for its contribution towards the solution of the longitude at sea problem, and nowadays Thomas Earnshaw ranks amongst our greatest chronometer inventors and has finally secured his rightful place in the history of marine technology. Earnshaw's so-called No.1 chronometer had been delivered for trials at the Royal Greenwich Observatory in February 1792, where it remained for two years until it was finally installed by Earnshaw himself at Armagh in Northern Ireland on the 18th August 1794, (where it remains to this day). www.manchester2002-uk.com /celebs/engineers3.html   (6150 words)

Manchester Engineers included George and Robert Stephenson, Thomas Earnshaw, James Hargreaves and Sir John Bradshaigh Eventually, Earnshaw's spring detent escapement was awarded £3,000 from the Board of Longitude for its contribution towards the solution of the longitude at sea problem, and nowadays Thomas Earnshaw ranks amongst our greatest chronometer inventors and has finally secured his rightful place in the history of marine technology. Thomas Earnshaw was a pioneer horologist and one of several developers of the marine chronometer. Earnshaw's so-called No.1 chronometer had been delivered for trials at the Royal Greenwich Observatory in February 1792, where it remained for two years until it was finally installed by Earnshaw himself at Armagh in Northern Ireland on the 18th August 1794, (where it remains to this day). www.manchester2002-uk.com /celebs/engineers3.html   (1767 words)

History of Watch Making and Collecting In 1766, Ferdinand Berthoud was sent to England by the Duc De Praslin, French minister of the marine, to make a marine chronometer. In 1769, Ferdinand Berthoud (1725 - 1807), a Swiss Clock maker, made outstanding marine chronometers. On November 3rd Ferdinand Berthoud sent two marine clocks to the French Navy to be tested at sea. www.carigem.org /history_of_watch_making_&_collecting.htm   (1767 words)

ClockWatch->Theory->Daniel-Escapement These oil-free escapements, brilliant as they may be - very particularly in marine chronometers- could never show their capabilities properly in watches because they couldn't accommodate the harsh environmental influences like bumps and knocks. The marine chronometer escapement is missing a few simple characteristics which are quite important for watches. Furthermore, a watch with a chronometer escapement does not start by itself. www.clockwatch.de /html/tec/hem/dan.htm   (820 words)

Horological Terms Marine Chronometer: Highly accurate mechanical or electronic timekeeper enclosed in a box (hence the term box chronometer), used for determining the longitude on board ship.Marine chronometers with mechanical movements are mounted on gimbals so that they remain in the horizontal position is necessary for their precision. Horology: The science of time measurement, including the art of desiging and constructing the timepieces. Barrel: Thin cylindrical box containing the mainspring of a watch. www.westimewatches.com /terms.htm   (820 words)

Clocks And Watches - Encylopedia Of Antiques The present Mercer marine chronometer has a helical balance spring made of an alloy of the precious metal palladium. Now a general name for a non-pendulum precision clock or a watch, although purists insist that it means a timepiece with a DETENT ESCAPEMENT, such as the MARINE CHRONOMETER. Now there is no major manufacturing in Clerkenwell, except for one firm of tower clock makers in Bowling Green Lane, and many watch and clock traders have joined the diamond dealers in Hatton Garden. www.oldandsold.com /articles02/clocks-c.shtml   (820 words)

Cartography Vocabulary Chapter 2 The mathematical construct that yields the quantitative indices of distortion at points on map projections is called: (a) Tissot's indicatrix; (b) the Clarke ellipsoid of 1866; (c) GRS80; (d) GPS; (e) marine chronometer. An extremely accurate timepiece used to determine longitude which was first perfected by John Harrison in 1761 is called a(n): (a) antipodal point; (b) loxodrome; (c) geoid; (d) marine chronometer; (e) ellipsoid. The point on the opposite side of the earth is termed the: (a) loxodrome; (b) GPS; (c) GRS80; (d) antipodal point; (e) geodesy. www.jsu.edu /depart/geography/mhill/cart/cvch2.html   (820 words)

Artifacts of the Golden Age Marine chronometers of all nationalities for centuries to come would retain the full-plate design for its performance advantages, where naturally thinness was not an issue. Pocket chronometers and chronometer tourbillons are prized but very delicate, but aside from these the watches of this time are the oldest that might properly be considered wearable by the pocket watch enthusiast. It is in fact the age of the chronometer, where the watch became a real timekeeping instrument rather than just an affected form of adornment, and a simple and functional aesthetic of dial, case, and movement, came to define the pocket watch in all places. people.timezone.com /msandler/Articles/CarlosArtifacts/Artifacts.html   (820 words)

Intrument makers on the Thames - - Port Cities Following the work of John Arnold, the London watchmaker Thomas Earnshaw (1749-1829) further simplified the designs of the pocket and marine chronometers into their modern, readily reproducible form. This is a typical example of Earnshaw's marine chronometers, made from the early 1790s until his retirement in around 1820. The design is little different from the marine chronometer of the mid-20th century. www.portcities.org.uk /server/show/ConGallery.125/Intrument-makers-on-the-Thames.html   (820 words)

Marine Chronometers Gallery During the mid to late 1700s, many innovative individuals were making chronometers, including Thomas Mudge, John Arnold, and Thomas Earnshaw in England, and Pierre Le Roy and Ferdinand Berthoud in France. Although John Harrison had advanced a practical method of finding longitude with his prizewinning chronometer, H-4, in 1759, his successors still faced the formidable challenge of making his complex and delicate design readily reproducible and affordable. However, significant advances would be made in chronometer production. www.nawcc.org /museum/nwcm/galleries/marine/marine.htm   (820 words)

Navigation With the exception of the compass, however, the greatest contribution made to maritime navigation was the invention of the marine chronometer, enabling mariners to establish longitude. The regulation states that VTS contribute to the safety of life at sea, safety and efficiency of navigation and the protection of the marine environment, adjacent shore areas, worksites and offshore installations from possible adverse effects of maritime traffic. Other important navigational instruments included the cross-staff, which was used for measuring the angle of the sun or Pole star and the back-staff, which was invented in 1594 to overcome the problems encountered by staring into the sun when using a cross-staff. www.oceansatlas.org /unatlas/uses/transportation_telecomm/maritime_trans/nav/navigation.htm   (820 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.