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Floating and Platform Balances an Introduction
Floating and Platform Balances An introduction ©Darrah Artzner 3/2018 Floating and Platform Balances • Introduce main types • Discuss each in some detail including part identification and function • Testing and Inspecting • Cleaning tips • Lubrication • Performing repairs Balance Assembly Type Floating Platform Floating Balance Frame Spring stud Helicoid spring Hollow Tube Mounting Post Regulator Balance wheel Floating Balance cont. Jewel Roller Pin Paired weight Hollow Tube Safety Roller Pivot Wire Floating Balance cont. Example Retaining Hermle screws Safety Roller Note: moving fork Jewel cover Floating Balance cont. Inspecting and Testing (Balance assembly is removed from movement) • Inspect pivot (suspension) wire for distortion, corrosion, breakage. • Balance should appear to float between frame. Top and bottom distance. • Balance spring should be proportional and not distorted in any way. • Inspect jewels for cracks and or breakage. • Roller pin should be centered when viewed from front. (beat) • Rotate balance wheel three quarters of a turn (270°) and release. It should rotate smoothly with no distortion and should oscillate for several (3) minutes. Otherwise it needs attention. Floating Balance cont. Cleaning • Make sure the main spring has been let down before working on movement. • Use non-aqueous watch cleaner and/or rinse. • Agitate in cleaner/rinse by hand or briefly in ultrasonic. • Rinse twice and final in naphtha, Coleman fuel (or similar) or alcohol. • Allow to dry. (heat can be used with caution – ask me how I would do it.) Lubrication • There are two opinions. To lube or not to lube. • Place a vary small amount of watch oil on to the upper and lower jewel where the pivot wire passed through the jewel holes. -
Winter Antiques & Fine Art Auction
Winter Antiques Winter & Art Auction Fine Wednesday 27, Thursday 28 & Friday 29 November 2019 Thursday 28 & Friday 29 November 27, Wednesday Winter Antiques & Fine Art Auction Wednesday 27, Thursday 28 & Friday 29 November 2019 Chris Ewbank, FRICS, ASFAV Andrew Ewbank, BA, ASFAV John Snape, BA, ASFAV Alastair McCrea, MA Senior partner Partner Partner Partner [email protected] [email protected] [email protected] [email protected] Andrew Delve, MA, ASFAV Tim Duggan, ASFAV Andrea Machen, Cert GA Emily Angus, BA, FGA Partner Partner Jewellery Specialist Gemmologist [email protected] [email protected] [email protected] [email protected] Front cover: Lot 1137 Inside front cover: Lots 1, 2099 & 2036 Back cover: Lot 385 WINTER ANTIQUES & FINE ART AUCTION Surrey & Hampshire’s Premier Auctioneers & Valuers Winter Antiques & Fine Art Auction Jewellery & Costume Jewellery, Watches, Coins, Silver Plate, Silver, Fine Art, Ceramics & Glass, Collectables & Militaria, Books & Maps, Works of Art & Tea Caddies, Clocks, Antique Furniture and Persian Rugs SALE: Wednesday 27, Thursday 28 & Friday 29 November 2019 from 9.30am VIEWING: Saturday 23 November 10am - 2pm Monday 25 November 9am - 5pm Tuesday 26 November 9am - 7pm Days of Sale For the fully illustrated catalogue, to leave commission bids, and to register for Ewbank’s Live Internet Bidding please visit our website: www.ewbankauctions.co.uk The Burnt Common Auction Rooms London Road, Send, Surrey GU23 7LN Tel +44 (0)1483 223101 E-mail: [email protected] Buyer’s Premium at 28.8% inclusive of VAT, is payable on every lot in this sale. -
Evolution of Clock Escapement Mechanisms
Miodrag Stoimenov Associate Professor Evolution of Clock Escapement University of Belgrade Faculty of Mechanical Engineering Mechanisms Branislav Popkonstantinović Associate Professor The paper presents and explains the evolution of details design of the clock University of Belgrade escapement mechanisms through the ages. As particularly significant, the Faculty of Mechanical Engineering following mechanisms are emphasized: the crown wheel (verge & foliot), Ljubomir Miladinović anchor recoil, deadbeat and detached escapements, and their variations – Associate Professor gravity and chronometer escapements, as well as the English and Swiss University of Belgrade lever watch escapements. All important geometrical, kinematical and Faculty of Mechanical Engineering dynamical properties and the influence of these properties on the clock Dragan Petrović accuracy are explained. Associate Professor University of Belgrade Keywords: clock, escapement, evolution, mechanism, lever. Faculty of Mechanical Engineering 1. INTRODUCTION oscillator with the restoring force and standardized pace. The crown wheel rate, acted upon by driving torque, is This work is aimed at a qualitative analysis of regulated only by the foliot inertia with a rather advancement in escapement mechanism structural unpredictable error. When the crown wheel is rotating, definition and development of a timepiece over the past the pallet of the verge is caught by one of the wheel’s seven centuries. This study cowers the following issues teeth, rotating the verge and a solid foliot in one a) the crown wheel, the verge and foliot, b) the recoil direction and leading to engagement of the opposite anchor escapement, c) deadbeat escapements, and d) tooth with the second pallet [4]. Due to the foliot inertia, detached escapements. Measure of the effectiveness in that next tooth stops the wheel’s motion, and the wheel the regulator horological properties could be specified with its eigen driving torque finally stops the rotation of as follows: a) the level of constructive and dynamic the foliot too. -
Checking for Proper Drop/Lock in the Swiss Lever Escapement
w I • w <( LLJ 0 z c 1- m ~ :::J LLI Ul 11. ~ 1- ::J ::J z 0 <( [J I z 0 w :::: w 0:: w c:: w I I l.L f- m LLI 1- w 0 z I J: z 0:: 1- 1- 0 o_ 0 HoROLOGICAL'" HoROLOGICALTM TIMES Official Publication of the American Watchmakers-Ciockmakers Institute TIMES EDITORIAL & EXECUTIVE OFFICES VOLUME 31, NUMBER 4, APRIL 2007 American Watchmakers-Ciockmakers Institute (AWCI) 701 Enterprise Drive, Harrison, OH 45030 Phone: Toll Free 1-866-FOR-AWCI (367-2924) or (513)367-9800 FEATURE ARTICLES Fax: (513)367-1414 E-mail: [email protected] 6 Patek Philippe 10-Day Tourbillon, By Ron DeCorte Website: www.awci.com 16 Checking for Proper Drop/Lock in the Swiss Lever Office Hours: Monday-Friday 8:00AM to 5:00 PM (EST) Escapement, By John Davis Closed National Holidays 22 ETACHRON, Part 2, By Manuel Yazijian Donna K. Baas: Managing Editor, Advertising Manager Katherine J. Ortt: Associate Editor, Layout/Design Associate DEPARTMENTS James E. Lubic, CMW: Executive Director Education &Technical Director 2 President's Message, By Dennis Warner Lucy Fuleki: Assistant Executive Director Thomas J. Pack, CPA: Finance Director 2 Executive Director's Message, By James E. Lubic Laurie Penman: Clock Instructor 4 Questions & Answers, By David A. Christianson Manuel Yazijian, CMW: Watchmaking Instructor Certification Coordinator 26 From the Workshop, By Jack Kurdzionak Nancy L. Wellmann: Education Coordinator Sharon McManus: Membership Coordinator 31 AWCI Material Search Heather Weaver: Receptionist/Secretary 32 Affiliate Chapter Report, By Wes Cutter Jim Meyer: IT Director 35 AWCI New Members HOROLOG/CAL TIMES ADVISORY COMMITTEE Ron Iverson, CMC: Chairman 39 Bulletin Board Karel Ebenstreit, CMW 42 Industry News Jeffrey Hess Chip Lim, CMW, CMC, CMEW 44 Classified Advertising E-mail: [email protected] 48 Advertisers' Index AWCI OFFICERS Dennis J. -
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"). -
A Practical and Theoretical Treatise on the Detached Lever Escapement For
http://stores.ebay.com/information4all mmmfm www.amazon.com/shops/information4allwww.amazon.com/shops/information4all http://stores.ebay.com/information4allhttp://stores.ebay.com/information4all OTTO YOUNG & CO., 149 & 151 State Street, Chicago, 111. ("WHOLESALE ONLY.l ^IISEC LIBRARY OF CONGRESS. 1 V Shelf .-.^33 UNITED STATES OF AMERICA. ®ool$ mm m^aunms A complete stock of above always on hand. Also a full line Elgin, Waltham, Howard, Hampden (Mass.) and Springfield (111.) Watch Movf ments. Deuber and Blauer Gold and Silver Cases, Keystone and Fahy's Silver Cases, Boss' Filled Cases, Rogers & Sro. Fiat Ware and Meriden Silver Plate Co.'s Hollow Ware. Solid Gold and Ro9ied Plate Jewelry m large variety. Gold and Silver Head Canes, Gold and Silver Thimbles, Pens, Pencils, Toothpicks, Etc. In fact, everything required by the jewelry trade. We guarantee quality exactly as represented ; have no leaders, but sell everything at uniform low prices. Send us your orders and they will be filled same day as received. Eespectfully, www.amazon.com/shops/information4allwww.amazon.com/shops/information4all ^pa 23 m^ http://stores.ebay.com/information4allhttp://stores.ebay.com/information4all Technical Works for Watchmakers and Jewelers. Prize Essay on the Detai lied Lever Escapemeut. By M. Grossinaiiu. Illiisti-ated. Our owu Premium edition. laper cover, ... - - S2. UU The same, bound in t^loth. ------- 2.50 Now in preparation and to Lo [lublished abtjut June 1st, 188-1: Instructions in Letter EnaTaving; the Ait Simplified and Made Easv of Acquirement. By Kennedy Gray. Illustrated. Paper cover, - - - - !|>_.uo The same, bound in cloth, ------- 2.50 will to regular subscribers of The Watch- A discount of 50 per cent, o i either of the above publications be made maker AND Metalworker. -
It Could Prove Your Wisest Investment. It Takes a Long Time to Build a Maker's High Standards
It could prove your wisest investment. It takes a long time to build a maker's high standards. A lineup to With SEIKO Battery, that's reputation for dependable, quality grow with. something you can always count on. products and service. The top SEIKO Battery power cells work reliability ofSEIKO's long-life watch in virtually every brand watch just as batteries will reassure you and your well as they work in a SEIKO. So customers it was time well spent. while not every watch can be a There are dozens of different SEIKO, its battery can. SEIKO quality watch batteries in the SEIKO Make sure every moment of your BATTERY Battery lineup. All designed and time and your customers' time is produced to the leading watch- well-spent. Grow with the Leader VOLUME 11, NUMBER 8 AUGUST 1987 HOROLOGICAL Official Publication of the American Watchmakers Institute WILLIAM BIEDERMAN PRESIDENT'S MESSAGE 12 4 Recap on AW/ Board Meeting HENRY B. FRIED QUESTIONS AND ANSWERS 8 A Pendulum's Elliptical Motion JOE CROOKS BENCH TIPS 12 Locking the Lock Wheel AWi Annual ARCHIE B. PERKINS TECHNICALLY WATCHES 14 Antique Watch Restoration, Part XX Meeting FRED S. BURCKHARDT ROCK QUARRY 18 A Day in the Life . 24 STEVEN G. CONOVER CHIME AND STRIKE 20 Gilbert Strike TIMOTHY R. WHITE CLOCKS INSIDE AND OUT 28 A Practical Guide to the Brocot Escapement Brocot MARSHALL F. RICHMOND PICKLE BARREL 32 Basic Jewelry Repair (Lesson 11) Setting Up a Basic Jewelry Shop Escapement JAMES ADAMS NOVICE WATCHMAKER 35 Mainsprings and Motor Barrels Guide WES DOOR SHOPTALK 36 Pricing Quartz Repairs 28 THOMAS H. -
Product Manual CH-4434 Hölstein Phone +41 61 956 11 11 Fax +41 61 951 20 65 [email protected] Contents
Oris SA Ribigasse 1 Product Manual CH-4434 Hölstein Phone +41 61 956 11 11 Fax +41 61 951 20 65 [email protected] www.oris.ch Contents. 7 English Introduction . 9 Adjusting Oris watches to fit the wrist . 20 Watches with leather straps . 20 Starting Oris watches . 10 Watches with rubber straps . 20 Crown positions . 10 Watches with metal bracelets . 20 Standard crown . 10 Fine adjustment of folding clasps . 20 Screw-down crown . 10 Crown with Oris Quick Lock system (QLC) . 10 Notes . 22 Screw-down pushers . 10 Accuracy . 22 Automatic winding watches . 11 Chronometer . 22 Manual winding watches . 11 Water-resistance . 24 Use and maintenance . 24 Setting and operating Oris watches . 12 Date, day of the week and time . 12 Technical information and Setting the date . 12 summary tables . 26 Worldtimer . 12 Pictograms . 26 Worldtimer with 3rd time zone and compass . 13 Metals for cases and straps . 27 2nd time zone on outer rotating bezel . 14 PVD coatings . 27 2nd time zone indicator on inner rotating Sapphire crystal . 27 bezel with vertical crown . 14 Mineral glass . 28 2nd time zone with additional 24 hr hand . 14 Plexi glass . 28 2nd time zone with additional 24 hr hand and Luminescent dials and hands . 28 city markers on the rotating bezel . 14 Metal bracelets, leather and rubber straps . 28 Chronograph . 15 Lunar calendar . 29 Complication . 15 Time zones . 30 Regulator . 16 Movements . 30 Pointer calendar . 16 Alarm with automatic winding . 16 International guarantee for Oris watches . 32 Tachymeter scale – measuring speeds . 17 Telemeter scale – measuring distances . 17 Proof of ownership . -
Purchasing Policies PDF Opens in New Window
Revised June 4, 2020 Table of Contents SECTION 1 – LCCC BOARD OF TRUSTEES Bylaws Lehigh Carbon Community College Board of Trustees .............................................................................................. 1-1 Article I Definitions.............................................................................................................................................. 1-1 Article II Authorization ......................................................................................................................................... 1-1 Article III Board of Trustees Membership .............................................................................................................. 1-1 Article IV Officers .................................................................................................................................................. 1-2 Article V Election of Officers ................................................................................................................................ 1-2 Article VI Meetings ................................................................................................................................................ 1-2 Article VII Committees ........................................................................................................................................... 1-3 Article VIII Order of Business ............................................................................................................................. 1-3 Article -
Modern Books on Horology 3
, HABrAHC U. S. DEPARTMENT OF COMMERCE Letter 2.3 national bureau of standards Circular WASHINGTON 25, D. C. LC981 April 1, 1950 ( Supersedes LC766) 1.. 2. MODERN BOOKS ON HOROLOGY 3. Contents General Information Historical and Descriptive Books Technical Books 4 Government Publications 1. General Information The purpose of this letter circular is to present a list of books which will be found valuable for the use of watchmakers, collectors, and others interested in timepieces and in their performance and repair. No attempt has been made to include books earlier. than 1900 or to list books in other than the English language, or numerous articles published in trade journals and horological magazines. Some of the books listed are obtainable from dealers; some, now unobtainable, can be found in public libraries. Price lists of books now on the market may be obtained from the watchmakers' supply dealers or from the following: The American Horologist, 226 Sixteenth St., Denver, Colo. The American Library Service, 117 West 4$th St., New York, N. Y. Henry Paulson Ave 111. & Co., 37 South Wabash . Chicago, Jewelers Circular - Keystone, Book Department, 100 East 42nd St., New York, N. Y. National Jeweler, 531 South LaSalle St., Chicago, 111. Books not found at these sources .may often be found by advertising in the jewelers' trade journals. A more extensive list of references on time, timepieces, and related subjects will be found in Time and Timepieces by Willis I. Milham, Appendix V, page 569 (1923). , 2 2 • Historical an d Descriptive Books 1. Time Telling Through the Ages Harry C. -
Auction House KANERZ ART PUBLIC SALE PRESTIGE ITEMS
Auction House KANERZ ART PUBLIC SALE PRESTIGE ITEMS Watches, Jewelry, Goldsmithing, Asian & African Art, Paintings, Fashion, Books including Law & Medicine, Art of Living, Furniture, Sculptures, Bronzes... Sunday, May 24th, 2020, at 2 PM Part I (10 AM to 12 AM) Jewelry, Watches, Lifestyle, Books, Medals, Asian Art… Part II (2 PM to 6 PM) African Art, Silverware, Bronze, Furniture, Paintings, Porcelain... The sale is broadcast live with possibility of online auction on Exhibition and sale in the room will take place under sanitary conditions in accordance with government recommendations (barrier gestures & limitation of the number of people in the room at the same time). In order to respect the distances on the day of the sale, only 20 people will be admitted upon registration. Exhibition of the lots: Thursday May 21 & Friday May 22, from 9 AM to 6 PM without interruption, Saturday May 23, from 10 AM to 2 PM. Sales Expert for Asian Items: PHILIPPE DELALANDE EXPERTISE 23 rue Lemercier 75017 Paris, France Tel: +33 (0) 6 83 11 24 71 Email: [email protected] All the lots are in photo on the site of the House of sale: www.encheres-luxembourg.lu Contact : [email protected] GSM : (+352) 621.612.226 Place of the sale: 35 Rue Kennedy, L-7333 Steinsel Free Parking Photos, pre-orders and general conditions of sale can be found on the website of the auction house KANERZ ART at www.encheres-luxembourg.lu. The sale is broadcast live with possibility of online and live auction on www.auction.fr Maison de Ventes KANERZ ART The visits will be an opportunity for buyers to get a clear idea of the desired objects beyond the formal description of the catalog. -
Dynamics of Periodic Impulsive Collision in Escapement Mechanism
Shock and Vibration 20 (2013) 1001–1010 1001 DOI 10.3233/SAV-130800 IOS Press Dynamics of periodic impulsive collision in escapement mechanism Jian Maoa,∗,YuFub and Peichao Lia aShanghai University of Engineering Science, Shanghai, China bTianjin Seagull Watch Co. Ltd, Tianjin, China Received 10 May 2012 Revised 25 January 2013 Accepted 13 April 2013 Abstract. Among various non-smooth dynamic systems, the periodically forced oscillation system with impact is perhaps the most common in engineering applications. The dynamical study becomes complicated due to the impact. This paper presents a systematic study on the periodically forced oscillation system with impact. A simplified model of the escapement mechanism is introduced. Impulsive differential equation and Poincare map are applied to describe the model and study the stability of the system. Numerical examples are given and the results show that the model is highly accurate in describing/predicting their dynamics. Keywords: Periodic collision, dynamics, escapement mechanism 1. Introduction Dynamics is an important branch of mechanical engineering. In the last century, the linear dynamics was well studied and understood. However, nonlinear dynamics is far from being fully understood because of its complexity and diversity [1]. Non-smooth dynamical system is a special category of nonlinear system. In practice, it is not difficult to find non-smooth dynamical systems, such as a hammer hitting a nail, a signal triggering an electrical circuit, and a disaster affecting the stock market. It is known that a typical smooth dynamical system can be described by an autonomous set of Ordinary Differen- tial Equations (ODEs) [2–6]. Newton method and Lagrange’s equation are two basic tools to model such dynamical systems.