David Thompson: Curator of Horology British Museum
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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. -
Ole Rømer's Pocket Watch
Poul Darnell Ole Rømer’s pocket watch Antiquarian Horology, Volume 36, No. 4 (December 2015), pp. 541–543 The AHS (Antiquarian Horological Society) is a charity and learned society formed in 1953. It exists to encourage the study of all matters relating to the art and history of time measurement, to foster and disseminate original research, and to encourage the preservation of examples of the horological and allied arts. To achieve its aims the AHS holds meetings and publishes books as well as its quarterly peer-reviewed journal Antiquarian Horology. The journal, printed to the highest standards with many colour pages, contains a variety of articles, the society’s programme, news, letters and high-quality advertising (both trade and private). A complete collection of the journals is an invaluable store of horological information, the articles covering diverse subjects including many makers from the famous to the obscure. The entire back catalogue of Antiquarian Horology, every single page published since 1953, is available on-line, fully searchable. It is accessible for AHS members only. For more information visit www.ahsoc.org Volume 36, No. 4 (December 2015) contains, apart from the regular sections Horological News, Book Reviews, AHS News, Letters to the Editor and Further Reading, the following articles and notes: NUMBER FOUR VOLUME THIRTY-SIX DECEMBER 2015 English provincial clockmaking 1695–1840. The role of the thirty-hour longcase clock – Part 2 by Michael Grange John & Miles Brockbank, their life and work by A.D. Stewart Short-time measurement – the contribution of German electrical horology by Thomas Schraven Ole Rømer’s pocket watch, by Poul Darnell The clocks of an Anglo-Welsh knight: Sir Edward Don (1482-1551), by William Linnard 1 DECEMBER 2015 Ole Rømer’s pocket watch Poul Darnell Ole Rømer’s letter to John Locke Fig. -
History of Escapement Mechanisms
Journal of Mechatronics, Automation and Identification Technology Vol. 3, No.2. pp. 8-12 History of Escapement Mechanisms Miša Stojićević, Branislav Popkonstantinović, Ljubomir Miladinović, Ivana Cvetković Faculty of Mechanical Engineering, Belgrade, Serbia Faculty of Mechanical Engineering, Belgrade, Serbia Faculty of Mechanical Engineering, Belgrade, Serbia Innovation Centre of the Mechanical Faculty Belgrade, Serbia [email protected], [email protected], [email protected], [email protected] Abstract—This paper describes a history of development one of the most important part of mechanical clock – escapement mechanism. Escapement mechanism is a device designed to maintain a constant average speed of the escape wheel, by allowing it to rotate to the desired angle at certain impulse of time. While doing that it simultaneously support the oscillations of the pendulum or balance spring, by compensating for friction losses and air resistance. 7 century long history of escapement mechanisms, from 13th century verge mechanism up to modern-day escapements that can be found in luxury watches, will be shortly presented. Through lives of famous clockmakers and their achievements in field of making escapement mechanism will be given a new insight in science of time keeping - horology. Keywords— escapement, mechanism, history, watches, clock I. INTRODUCTION Fig. 1 Verge escapement The escapement mechanism is a key part of every However, the late middle Ages also recorded the mechanical clock, because it maintains and counts appearance of hand and pocket watchmakers. The first oscillations of the oscillator and thus measures the flow portable timer, the so-called. The Nuremberg egg (Fig. 2), of time. It can be also said that escapement is a device which could be worn in a pocket or purse (Ger.: that transfers energy to the timekeeping element (the taschenuhr), was constructed in Nuremberg by "impulse action") and allows the number of its watchmaker Peter Henlein, (1485-1542) oscillations to be counted (the "locking action"). -
London Women in Horology by Bob Frishman, FNAWCC (MA)
© 2020 National Association of Watch and Clock Collectors, Inc. Reproduction prohibited without written permission. London Women in Horology By Bob Frishman, FNAWCC (MA) he 2020 NAWCC Ward Francillon Time by Samuel Elliott Atkins, a former Clerk of the Company, Symposium, “Horology 1776,” will take place in and privately printed in 1881. Top of the roster is Mariane T Philadelphia on October 1–3 at the Museum of Viet who was “bound” for seven years on January 27, the American Revolution. One important speaker on 1715, to her father Claude. the conference theme of timekeeping during our War English women’s names also are among the tiny-print of Independence will be Emily Akkermans, curator at 873 pages of Watchmakers and Clockmakers of the London’s Greenwich Observatory. She is one of the World by Brian Loomes, published in 2006, although women featured in this article, and she will be happy to most were widows and daughters of men in the trade. On meet and chat with all who attend. Symposium details and page 352 for example, Mrs. Agnes Harrison of Morpeth is registration can be found at www.horology1776.com . listed in 1884 as “Widow of Francis Harrison.” Miss Viet Horology in England has always been dominated by men. appears here, too, on page 798, with the additional detail Names like Fromanteel, Harrison, Tompion, Graham, that her father had a partner, Thomas Mitchell. Mudge, Ferguson, Vulliamy, and now George Daniels In Colonial America and then in the United States the are on every list of the most famous practitioners, situation was similar, although we know that from the theoreticians, and scholars of our applied science. -
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 ...,.,.,. -
The Greenwich Clock at Towneley by Tony Kitto
The Greenwich Clock at Towneley by Tony Kitto Towneley Hall Art Gallery and Museums 2007 Copyright Burnley Borough Council Reading the time from the Greenwich Clock The hour hand goes round the dial once every twelve hours in the usual way but the minute and second hands take twice as long as is normal. It takes 2 hours for the minute hand to go round. At the top of the dial, starting at 12 o'clock, there are 60 divisions of one minute down to 6 o'clock and another 60 divisions back to 12 o'clock. The minutes are difficult to read because the minute hand shares the same dial as the hour hand. In comparison, it is relatively easy to read the second hand. The second hand goes round its own dial with 120 divisions, marked out in 10 second periods, once every 2 minutes. We expect a minute hand to go round the dial once an hour. Most people estimate the time from the angle of the minute hand but that is misleading when looking at this clock. 2:00 ? 2:15 ? 3:30 ? 3:45? 4:00? yes no, its 2:30 no, its 3:00 no, its 3:30 yes The Greenwich Clock at Towneley The Greenwich Clock in the entrance hall at Towneley is a reconstruction of one of a pair of clocks presented to the Royal Observatory at Greenwich by Sir Jonas Moore in 1676. It was made in 1999 by Alan Smith of Worsley, Greater Manchester, to show how the original clocks worked. -
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. -
Finding Longitude: the 2017, Vol
IJH0010.1177/0843871417725688The International Journal of Maritime HistoryMorgan 725688research-article2017 Article IJMH The International Journal of Maritime History Finding longitude: The 2017, Vol. 29(4) 771 –787 © The Author(s) 2017 Investigator expedition, Reprints and permissions: sagepub.co.uk/journalsPermissions.nav 1801–1803 https://doi.org/10.1177/0843871417725688DOI: 10.1177/0843871417725688 journals.sagepub.com/home/ijh Kenneth Morgan Brunel University London, UK Abstract This article analyses the methods deployed for finding longitude on the Investigator’s expedition to circumnavigate Australia, made under the command of Matthew Flinders in the period 1801–1803. Timekeeping and astronomy were complementary methods for ascertaining longitude; they were carried out using chronometers and by taking lunar observations. The article explains who was responsible for handling the astronomical readings on the expedition; the performance of the chronometers used; Flinders’s comparisons of the longitudinal readings with the work of previous navigators; and the reasons why dissemination of the longitudes taken during the voyage was delayed. The article shows how the combined use of chronometers and lunar observations helped Flinders to achieve scientific accuracy in his charting of coastal Australia in the atlas to his major work entitled A Voyage to Terra Australis. Keywords Australia, longitude, maritime exploration, Matthew Flinders, navigation, scientific instruments During the eighteenth century, important improvements in determining longitude ena- bled navigators to establish clearly their position and time relative to a given meridian. Navigators needed to know precisely their east–west position on the globe in relation to an initial prime meridian (based on Greenwich time in the Anglophone world) in order to sail safely across the oceans.1 Finding latitude at sea presented fewer technical and 1. -
35 Years of the Daniels Co-Axial Escapement Embodied in an Extraordinary Collaboration
35 YEARS OF THE DANIELS CO-AXIAL ESCAPEMENT EMBODIED IN AN EXTRAORDINARY COLLABORATION The response to our initial release was exceptionally positive and we are now pleased to present more details regarding the recently announced collaboration between Dr. George Daniels C.B.E., M.B.E. and Roger Smith for a series of Co-Axial Anniversary wristwatches. As many of you will undoubtedly already know, the Daniels co-axial escapement must be counted as the 20th century’s major innovation in watch escapement development, following on the earlier footsteps of several famed 18th century English horologists including George Graham, Thomas Earnshaw and Thomas Mudge. It is a story unto itself of Dr. Daniels’ efforts to gain recognition for his landmark horological creation within a skeptical industry that took time to understand its inner workings and unique qualities. The key advantage that Daniels’ escapement has over the lever escapement lies in the highly efficient method with which power is delivered from the mainspring to the balance wheel. Simply put, the standard lever escapement achieves this final delivery of power via a long sliding action while the co-axial achieves its delivery of power by a simple pushing action, similar to the motion used to impel a gate or door to swing open. This important difference in the way power is finally delivered means that the co-axial escapement is unaffected by any deterioration in the condition of an applied lubricant, whereas the lever escapement’s proper function is totally reliant upon the quality and type of lubricant used. The limited edition Co-Axial Anniversary wristwatch Throughout Dr. -
The Clive Collection of Exceptional Clocks & Watches
The Clive Collection of Exceptional Clocks & Watches New Bond Street, London | 19 June 2019 STUDIO OF WILLEM WISSING (Amsterdam 1656-1687 Burghley) Full-length portrait of Queen Mary II, a palace beyond. The Clive Collection of Exceptional Clocks & Watches New Bond Street, London | Wednesday 19 June 2019 at 3:30pm VIEWING BIDS ENQUIRIES CUSTOMER SERVICES Sunday 16 June, 11am to 3pm +44 (0) 20 7447 7447 Clocks Monday to Friday Monday 17 June, 9am to 4.30pm +44 (0) 20 7447 7401 fax James Stratton M.R.I.C.S 8.30am to 6pm Tuesday 18 June, 9am to 4.30pm To bid via the internet please + 44 (0) 20 7468 8364 +44 (0) 20 7447 7447 Wednesday 19 June, 9am to 12pm visit bonhams.com [email protected] Richard Davis As a courtesy to intending The Clive Collection will Please note that bids should be + 44 (0) 20 7468 2371 bidders, Bonhams will provide follow the Fine Clocks submitted no later than 4pm on [email protected] a written indication of the sale, starting no earlier the day prior to the sale. physical condition of lots in this than 3.30pm New bidders must also provide Watches sale if a request is received up to proof of identity when submitting Jonathan Darracott 24 hours before the auction starts. bids. Failure to do this may result +44 (0) 20 7447 7412 This written indication is issued in your bids not being processed. [email protected] subject to Clause 3 of the Notice SALE NUMBER to Bidders. 25730 Administrator Lots 101-107 Vanessa Howson Live online bidding is + 44 (0) 20 7468 8204 Please see back of catalogue available for this sale [email protected] for important notice to bidders CATALOGUE Please email [email protected] Softback with “Live bidding” in the subject ILLUSTRATIONS £20.00 REGISTRATION line 48 hours before the auction IMPORTANT NOTICE Front cover: Lot 103 to register for this service. -
UNIVERSITY of CALIFORNIA RIVERSIDE a Quest
UNIVERSITY OF CALIFORNIA RIVERSIDE A Quest for Insularity: Thomas Forrest’s Voyage to New Guinea, and the Moluccas A Dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Comparative Literature by Panida Lorlertratna June 2012 Dissertation Committee: Dr. Hendrik M. J. Maier, Chairperson Dr. John N. Kim Dr. Mariam B. Lam Copyright by Panida Lorlertratna 2012 The Dissertation of Panida Lorlertratna is approved: ________________________________________ ________________________________________ ________________________________________ Committee Chairperson University of California, Riverside ACKNOWLEDGEMENTS I would like to express my gratitude towards Professor Hendrik M. J. Maier for his incessantly rigorous mentoring that was instrumental in shaping the outcome of this research. My thanks go to Professor Mariam B. Lam for her thoughtful suggestions and to Professor John N. Kim for his remarkable theoretical insights. My appreciation is also extended to Professor Benjamin King for his help with the translation of Latin proverbs. I feel grateful for the Dissertation Year Program Fellowship in Winter 2011 from the Graduate Division of University of California, Riverside, which was crucial for the timely completion of the dissertation. My sincere thanks are offered to the colleagues and faculty in the Department of Comparative Literature and in the Southeast Asian Studies Program (SEATRiP) at UCR, who constituted a thriving academic environment in which I conducted my research. Finally, I feel greatly indebted to my family members, both human and canine, for allowing me the freedom to pursue my scholarly interests. ! iv ABSTRACT OF THE DISSERTATION A Quest for Insularity: Thomas Forrest’s Voyage to New Guinea, and the Moluccas by Panida Lorlertratna Doctor of Philosophy, Graduate Program in Comparative Literature University of California, Riverside, June 2012 Dr.