The World's Greatest Living Watchmaker, George Daniels, Is
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Articles Articles ALEXI BAKER “Precision,” “Perfection,” and the Reality of British Scientific Instruments on the Move During the 18th Century Résumé Abstract On représente souvent les instruments scientifiques Early modern British “scientific” instruments, including du 18e siècle, y compris les chronomètres de précision, precision timekeepers, are often represented as static, comme des objets statiques, à l’état neuf et complets en pristine, and self-contained in 18th-century depictions eux-mêmes dans les descriptions des débuts de l’époque and in many modern museum displays. In reality, they moderne et dans de nombreuses expositions muséales were almost constantly in physical flux. Movement and d’aujourd’hui. En réalité, ces instruments se trouvaient changing and challenging environmental conditions presque constamment soumis à des courants physiques. frequently impaired their usage and maintenance, Le mouvement et les conditions environnementales especially at sea and on expeditions of “science” and difficiles et changeantes perturbaient souvent leur exploration. As a result, individuals’ experiences with utilisation et leur entretien, en particulier en mer et mending and adapting instruments greatly defined the lors d’expéditions scientifiques et d’exploration. Ce culture of technology and its use as well as later efforts sont donc les expériences individuelles de réparation at standardization. et d’adaptation des instruments qui ont grandement contribué à définir la culture de la technologie. In 1769, the astronomer John Bradley finally the calculation of the distance between the Earth reached the Lizard peninsula in Cornwall and the Sun. Bradley had not needed to travel with his men, instruments, and portable tent as far as many of his Transit counterparts, but observatory after a stressful journey. -
Hordern House Rare Books Pty
77 vICTORIA STREET • POTTS POINT • SyDNEy NSw 2011 • AUSTRAlia • TElephONE (02) 9356 4411 • fAx (02) 9357 3635 HORDERN HOUSE RARE BOOKS PTY. LTD. A.B.N. 94 193 459 772 E-MAIL: [email protected] INTERNET: www.hordern.com DIRECTORS: ANNE McCORMICK • DEREK McDONNELL HORDERN HOUSE RARE BOOKS • MANUSCRIPTS • PAINTINGS • PRINTS • RARE BOOKS • MANUSCRIPTS • PAINTINGS • PRINTS • RARE BOOKS • MANUSCRIPTS • PAINTINGS Acquisitions • October 2015 Important Works on Longitude 2. [BOARD OF LONGITUDE]. The 3. [BUREAU DES LONGITUDES]. Nautical Almanac and Astronomical Connaissance des tems, a l’usage des Ephemeris, for the Year 1818. Astronomes et des Navigateurs pour l’an X… Octavo, very good in original polished calf, faithfully rebacked. London, John Octavo, folding world map and two Murray 1815. folding tables; an attractive copy in contemporary marbled calf, gilt, red Rare copy of the Nautical Almanac for spine label. Paris, l’Imprimerie de la 1818, a fundamental inclusion in the République, Fructidor, An VII, that is shipboard library of any Admiralty- circa August 1799. sponsored voyage. The Almanac was used for reckoning the longitude at sea A handsome copy of this rare work by the lunar method, and was closely by the French Bureau des Longitudes, studied by officers of the Royal Navy. for use by naval officers for the year The continued publication of such 1802 and 1803. The volume includes a almanacs is further proof that the handsome map of the world showing invention of the chronometer, (whilst the track of a solar eclipse that revolutionary), did not completely occurred in August of that year. Much supersede the necessity for other fail- like the British equivalent, these tables 1. -
National Association of Watch and CLOCK Collectors VOL
VOL 34 ISSUE 3 NOVEMBER 2010 NATIONAL ASSOCIATION OF WATCH AND CLOCK COLLECTORS earlier watch by Earnshaw as his form of detent escapement came to be the accepted form and is still manufactured today. I took this watch with me on a visit to the Victoria and Albert Museum in London as I had a letter of introduction to Jonathan Betts; the curator of Horology there. After showing him the watch, he took Nancy and I down to the student room where they do all the cataloging and restoration of their valuable pieces. He further told us some of the history of Earnshaw and the interesting fact that they had pieces numbered close to my watch, which is #3484. A sister watch of the Museum and ours was one of Two favourites belonging to Colin born in the Kirklington District of four carried by Bligh on his second & Nancy Hill. Cumberland, (1673 and died 1750). voyage wheh he sailed in the ship In the 1970’s, I joined the He was one of the most eminent THE PROVIDENCE in 1791. Bligh NAWCC and so began our visits to English horologists employing verge was testing the accuracy of these the NAWCC regionals in the United escapements to 1726, then his highly timepieces for their use in the Royal States, during which time Nancy sophisticated improvements to the Navy’s navigation prowess, pieces and I made many friends in the cylinder escapement, his invention carried were by Earnshaw; #1503 horological collecting fraternity, of the dead-beat escapement and the and a second timepiecepiece #1508. -
Skeleton Tourbillon- Skeleton
A tourbillon is RUSSIAN SOUL MADE IN GERMANY an addition to the mechanics Poljot-V GmbH” was founded in in 1992 of a watch es- in Frankfurt/Main (Germany) to sell capement. De- watches made by The First Moscow veloped around Watch Factory, Russia’s first and biggest 1795 by the watch factory at the time. The distribu- French-Swiss tion was followed by the creation of a watchmaker new brand “Poljot-International” in 1995. Abraham-Louis On the one hand, continuing the Rus- Breguet from an earlier idea by the English chro- sian traditions of the brand “Poljot”, the newly founded watch nometer maker John Arnold, a tourbillon aims brand “Poljot-International” has been choosing a fundamen- to counter the effects of gravity by mounting the tally new way of development by using new high-quality mate- escapement and balance wheel in a rotating rial for the watch production creating its own modern design, cage, to negate the effect of gravity when the high quality assembling of watches and a severe systematic timepiece (and thus the escapement) is stuck in process control. a certain position. The projecting works, manufacturing and certifying of watches In “Basilika” Tourbillon – Skeleton, the tourbillon were relocated to Germany, as a result of which the company cage is placed on the 6h position and the arrow- could become completely independent and evolve its own de- bridge inside which moves 60 seconds can also velopment strategy. In the same year the company joined the be used as a second counter. Many small parts “Federation of German Watch Producers”. -
“Precision,” “Perfection,” and the Reality of British Scientific Instruments on the Move During the 18Th Century Alexi Baker
Document generated on 09/29/2021 11:28 a.m. Material Culture Review “Precision,” “Perfection,” and the Reality of British Scientific Instruments on the Move During the 18th Century Alexi Baker Volume 74-75, 2012 Article abstract Early modern British “scientific” instruments, including precision timekeepers, URI: https://id.erudit.org/iderudit/mcr74_75art01 are often represented as static, pristine, and self-contained in 18th-century depictions and in many modern museum displays. In reality, they were almost See table of contents constantly in physical flux. Movement and changing and challenging environmental conditions frequently impaired their usage and maintenance, especially at sea and on expeditions of “science” and exploration. As a result, Publisher(s) individuals’ experiences with mending and adapting instruments greatly defined the culture of technology and its use as well as later efforts at standardization. National Museums of Canada ISSN 0316-1854 (print) 0000-0000 (digital) Explore this journal Cite this article Baker, A. (2012). “Precision,” “Perfection,” and the Reality of British Scientific Instruments on the Move During the 18th Century. Material Culture Review, 74-75, 14–29. All rights reserved © National Museums of Canada, 2011 This document is protected by copyright law. Use of the services of Érudit (including reproduction) is subject to its terms and conditions, which can be viewed online. https://apropos.erudit.org/en/users/policy-on-use/ This article is disseminated and preserved by Érudit. Érudit is a non-profit inter-university consortium of the Université de Montréal, Université Laval, and the Université du Québec à Montréal. Its mission is to promote and disseminate research. -
As a Clockmaker Turns Introduction to the Lathe Steady Rest, Part 1 Seeking Candidaie, Archie B
Luxury Watch Straps-.rrencli.rasliionforWatches Top of the Line + Hand-made Straps in a Variety of styles + Luxury Craftsmanship Tradition, Rare skins, Rich Choice of Colors + Non-allergenic & Waterproof lining + + Stainless Steel and Nickel-Free Gilded Buckles + We are so confident that you will be delighted with the quality and workmanship of these straps that we will send them out for your inspection and you may return them for full credit if you are not entirely satisfied. These straps have the look, smell, and soft feel of straps selling for twice as much! You could easily take off the pre-ticket pric ing and use your own to obtain the BEST PROF/Tyou can in your particular area. This sturdy, black rotating display contains 72 of the most If you would popular styles and price points. This very attractive design prefer other gives you the maximum exhibition space and simple, straps from this line, instead of rational stock management. Made of heavy metal, display those offered in measures 7" wide x 6" deep x 14" high, is anti-theft, the assortment displays 24 straps and stores up to 150 straps. we will be happy to exchange Keystone Pricing them for you. 72-Piece Asst. with FREE Counter Display .... ...--· ··--. -- - - . ~ - r.. ;"P."'··~·t~«r.J'.~"1~i'foJ. .- .. - -· . - - 95 95 #579 s9 • Crocodile Grain • Colors: Black or Brown #504 $12 • Stitched Pig Skin • Colors: Black, Brown or Tan - ' -- : ~ . ;:!· ~ ..... ' ·.-•.J,>} c... -·:~:?:!.::~-...:.-.::........ _,.....,-a·"'""'~·:"••·: "'.:":"·~·-1JCC'"" J '-.-:r~:-.-.:~~ --~ 95 95 #509 s14 • Stitched Crocodile Grain •Colors: Black or Brown #563 $21 • Box Calf Skin •Colors: Black, Brown or Burgundy ...,.,.,. -
Century Regulator by John Roger Arnold Expert Adviser's Statement
Case 5 2010-11 : An early 19 th -century regulator by John Roger Arnold Expert Adviser’s Statement EXECUTIVE SUMMARY 1. Brief Description of item • What is it ? Longcase regulator • What is it made of ? Mahogany, brass and steel. • What are its measurements ? Height 193 cms. • Who is the artist/maker and what are his/her dates? John Roger Arnold (1769 – 1843) • What date is the item? 1795 – 1800 • What condition is it in? Good and original. 2. Context • Provenance From the time of manufacture to the recent sale at Bonham’s London Auction House (15th December 2009), making an assumption of inheritance, the regulator has a traceable provenance – see appendix 3 below. • Key literary and exhibition references The regulator has not been exhibited and has not featured in any published work. 3. Waverley criteria • Which of the Waverley criteria does the item meet? (If it is of ‘outstanding significance for the study of some particular branch of art learning or history’ which area of art learning or history). Waverley Criteria1 and 3. • Very briefly why? Waverley Criterion 1– It is so connected with our history (including local history) and national life that its departure would be a misfortune. This regulator is important because it is intimately connected with the life and business of one of Britain’s internationally recognised and celebrated chronometer making businesses and with the history of precision timekeeping in this country - an area in which London clock, watch and chronometer makers lead the world for over a century. The Arnold business had a history of providing regulators of the highest quality to observatories, perhaps the most celebrated examples being two regulators commissioned from John Arnold senior in April 1772 for the Royal Observatory, Greenwich. -
Resonance Chronometer
Resonance Chronometer Six unique timepieces featuring: the first wristwatch movement with two independent balances synchronised by resonance for supreme mechanical precision. An exclusive movement: invented and made by master-watchmaker, F. P. Journe. François-Paul Journe has been studying the physical phenomenon of resonance for 20 years. At the start of his career, when he was working at his uncle’s horological workshops, he was entrusted with the restoration of a resonance clock made for the king of France. He was fascinated by the idea that a mechanism could apply such a mysterious phenomenon to achieve precision. The young man’s interest in resonance brought him into long discussions with a friend, a naval engineer who was also faced with the disturbing influences of this phenomenon. After much trial and error, Journe succeeded in building a resonance pocket-watch in 1983, and finally the world’s first wristwatch movement using the principle of resonance. Resonance — the synchronisation of frequencies Every oscillating object sends out vibrations. Nearby bodies absorb the energy and can start vibrating at the same frequency. This phenomenon of resonance is part of our daily lives. In a resonance watch, each balance both sends out vibrations and absorbs those of its pair. When they start oscillating they naturally become synchronised, beating in counter-phase. This only happens when they are around 0.4mm apart and the difference in their rate is less than 10 seconds a day. A rack-and-pinion moves one balance closer to its twin until resonance sets in. Both then beat together as twin hearts, keeping the time with a precision that no other mechanical watch can equal. -
Readingsample
History of Mechanism and Machine Science 21 The Mechanics of Mechanical Watches and Clocks Bearbeitet von Ruxu Du, Longhan Xie 1. Auflage 2012. Buch. xi, 179 S. Hardcover ISBN 978 3 642 29307 8 Format (B x L): 15,5 x 23,5 cm Gewicht: 456 g Weitere Fachgebiete > Technik > Technologien diverser Werkstoffe > Fertigungsverfahren der Präzisionsgeräte, Uhren Zu Inhaltsverzeichnis schnell und portofrei erhältlich bei Die Online-Fachbuchhandlung beck-shop.de ist spezialisiert auf Fachbücher, insbesondere Recht, Steuern und Wirtschaft. Im Sortiment finden Sie alle Medien (Bücher, Zeitschriften, CDs, eBooks, etc.) aller Verlage. Ergänzt wird das Programm durch Services wie Neuerscheinungsdienst oder Zusammenstellungen von Büchern zu Sonderpreisen. Der Shop führt mehr als 8 Millionen Produkte. Chapter 2 A Brief Review of the Mechanics of Watch and Clock According to literature, the first mechanical clock appeared in the middle of the fourteenth century. For more than 600 years, it had been worked on by many people, including Galileo, Hooke and Huygens. Needless to say, there have been many ingenious inventions that transcend time. Even with the dominance of the quartz watch today, the mechanical watch and clock still fascinates millions of people around the, world and its production continues to grow. It is estimated that the world annual production of the mechanical watch and clock is at least 10 billion USD per year and growing. Therefore, studying the mechanical watch and clock is not only of scientific value but also has an economic incentive. Never- theless, this book is not about the design and manufacturing of the mechanical watch and clock. Instead, it concerns only the mechanics of the mechanical watch and clock. -
The Early History of Chronometers : a Background Study Related to the Voyages of Cook, Bligh, and Vancouver
The Early History of Chronometers : A Background Study Related to the Voyages of Cook, Bligh, and Vancouver SAMUEL L. MAGE Y The purpose of this paper is to outline the historical developments relat ing to the chronometer, which played so crucial a part in the voyages of discovery made by Cook, Bligh and Vancouver. The inventor of the first successful chronometer — a technological marvel of precision watchmak ing — was John Harrison. His most famous model was the prize-winning H4 of 1759. Kendall's copy of this, known as Ki, helped Cook to plot the first charts of New Zealand and Australia. Ki was also used by Van couver, while K2 was once carried by Bligh on the Bounty.1 It is generally well known that in 1714 the British Admiralty offered a prize of twenty thousand pounds (possibly a million dollars in modern terms) for a method that could determine longitude on board a ship to within half a degree (or approximately thirty miles) on a passage to the West Indies. It is, however, less well appreciated how important a part the need for deter mining longitude had already played in the process of developing accurate clocks and watches for use on land as well as on the sea. Commander Waters has pointed out that "By about 1254 the Medi terranean seaman" knew his "direction between places to within less than 30 of arc", as well as his distances; "By about 1275 ... he had also a remarkably accurate sea chart of the whole of the Mediterranean and Black Sea coastlines", together with the sea compass and relevant table.2 Though there are claims that the sea compass was a European inven tion of slightly earlier date, Price feels that the use of the loadstone in navigation was probably of Chinese origin. -
Ref. 5101R 10-Day Tourbillon Patek Philippe’S Marathon Runner Now in Rose Gold
Press Release Patek Philippe Geneva March 2009 The new Ref. 5101R 10-Day Tourbillon Patek Philippe’s marathon runner now in rose gold Six years ago, the Ref. 5101P turned heads and won over hearts. The rectangular timepiece with a platinum case, a form movement, two mainspring barrels for a power reserve of 10 days, and a tourbillon escapement flaunted its assets with the discreetness and understatement that is so typical for Patek Philippe. Now, the time has come to introduce a new version: the Ref. 5101R in 18K rose gold. The benchmark for marathon runners: a 10-day power reserve Launched in the year 2000, the 10-day Patek Philippe Ref. 5100 initiated a trend that since then galvanized many high-end watchmaking companies. New watches with power reserves of four, six, and eight days appeared year after year. But in 2003, Patek Philippe outdistanced other contenders with the Ref. 5101, which in addition to the 10-day power reserve also featured a tourbillon escapement. To this very day, it is still the only crown-wound wristwatch with such an extended autonomy. It must be noted that the power reserve refers to the period in which the watch preserves a functional amplitude and thus fulfills strict rate accuracy requirements. This holds true for the new Ref. 5150 R, which runs accurately for 240 hours when fully wound. The advantage is obvious: it can easily be left off the wrist for a week without having to be resynchronized. In the Patek Philippe caliber 28-20/222 manufacture movement, the requisite energy is stored in two mainspring barrels. -
Committed to Science Arnold at Christie's
102 Nature Vol. 291 14 May 1981 ment of those results by using the relevant research community's own judgements of Arnold at Christie's scientific value, both directly (through con An 8-day marine timekeeper which is fidential questionnaires) and indirectly being offered for sale on 3 June at (through publication rates and citation Christie's London auction rooms is frequencies). thought to be a prototype for the modern A preliminary version of the radio marine chronometer, and it has been astronomy study was read last year at a suggested that the spring detent which it closed session of the Organization for employs could be the earliest ever, pre Economic Cooperation and Development, dating the putative "Earnshaw" pattern and was very well received; but the wide cir by several years. Made by John Arnold in culation of that paper, particularly in the London around 1775, the design of this Netherlands and West Germany, whose un-numbered chronometer throws light own radio telescopes were also assessed on the many problems which confronted (not all favourably) led to recrimination Arnold in his efforts to construct a from Jodrell Bank, which did not do so timekeeper which would be accurate and well in the study. And now North-Holland, reliable and could also be made in the publisher of Research Policy, in which quantity at a relatively low price. the final paper was to appear, is said to be His chronometer (a term he himself refusing to publish the radioastronomy coined) was designed to keep the same work. rate of going in every position and it Moreover, the originator of the SPRU incorporates a mechanism to compensate study, Sussex physicist Dr Norman for changes in temperature.