Evolution of Clock Escapement Mechanisms
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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. -
Vleeuwen on Van Call
© 2013 Antiquarian Horological Society. Reproduction prohibited without permission. MARCH 2013 Jan van Call and the age of the pendulum clock in the Netherlands Pier van Leeuwen* The signature of Jan van Call, best known for his work on turret clocks, appears on a controversial wall clock that was the subject of a symposium held at the British Museum in 2011. At this symposium, the author sketched van Call’s documented biographical data against the colourful background of Anglo-Dutch history. This article, a much reduced version of that presentation, focuses on Van Call’s specific achievements and preserved heritage. From Kall to Nijmegen Brabant. The brass drum had twenty-four holes on one Jan van Call was born in Kall in the German Eifel and rule of about 45 cm. On 1 January 1647 Jan Becker moved to Batenburg near Nijmegen in the Dutch duchy Call was granted citizenship in the town of Nijmegen, of Guelders (since 1814 Province of Guelderland). This by which time he must have moved from Batenburg to old capital of the duchy had a rich medieval history, the capital. Amongst other constructional work he renowned among art historians as the birthplace of the produced pumps, drains and waterworks.3 Limburg brethren, court illuminators of at least two Books of Hours for the Duke of Berry. Nijmegen had an Repairing a monumental clock impressive medieval castle known as the Valkhof, once In the year in which he officially became a citizen of inhabited by emperor Charles V who made the old Nijmegen, Jan van Call repaired, for the fee of 280 duchy another part of his Habsburg realm. -
The Evolution of Tower Clock Movements and Their Design Over the Past 1000 Years
The Evolution Of Tower Clock Movements And Their Design Over The Past 1000 Years Mark Frank Copyright 2013 The Evolution Of Tower Clock Movements And Their Design Over The Past 1000 Years TABLE OF CONTENTS Introduction and General Overview Pre-History ............................................................................................... 1. 10th through 11th Centuries ........................................................................ 2. 12th through 15th Centuries ........................................................................ 4. 16th through 17th Centuries ........................................................................ 5. The catastrophic accident of Big Ben ........................................................ 6. 18th through 19th Centuries ........................................................................ 7. 20th Century .............................................................................................. 9. Tower Clock Frame Styles ................................................................................... 11. Doorframe and Field Gate ......................................................................... 11. Birdcage, End-To-End .............................................................................. 12. Birdcage, Side-By-Side ............................................................................. 12. Strap, Posted ............................................................................................ 13. Chair Frame ............................................................................................. -
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"). -
Drexler School of Watch Repairing No 4
CONTENTS OF BOOK IV. , Page Removing a Barrel Hook ................................... 45 Making a Barrel Hook ..................................... 45 Inserting a Barrel Hook .................................... 45 Repairing the Mainspring .................................. 45 Inserting the Mainspring. 46 Stop Works . 46 To Set a Stop Work. 46 Carrier and Taper ......................................... 47 Centering and Making Carrier. 4 7 To Make the Pivot Rest ................................... 48 Polishing Pivots . 49 Bushing ................................................. 49 Making the Bushing. 49 Inserting the Bushing. 50 Side Shake . 50 Depthing . 50 Correcting the Depthing. 50 Soft Soldering . 51 Straightening a Wheel Tooth. 52 Inserting a Tooth ......................................... 52 Inserting a Tooth in a Barrel. 52 Truing Escape Wheel Teeth. 53 Truing in the Round. 53 Shaping the Teeth ......................................... 53 Refinishing Pallets . 53 The Fiber Disk. 54 Clock Escapements . 54 Dead Beat Escapement. 55 Recoil Escapement ........................................ 55 Anchor Pin Escapement. 55 How to Adjust the Escapement. 55 Assembling a French Clock with Visible Escapement. 56 Setting in Beat and Timing. 58 Copyright, 1914 and 1915, by JOHN DREXLER. REMOVING A BARREL HOOK. If the hook is found broken or too short, causing the mainspring to slip, scratch an arrow on the inside of the barrel to show which way the hook points, and drill a hole in the center of the hook about three-quarters its size. From the outside of the barrel, insert a broach in the hole, strike lightly with a hammer and turn it inward until the shell from the old hook is released from the bar rel. If the hook is not threaded, broach the hole in it until the shell drops out and cut a thread in the hole in the barrel with a suitable sized tap. -
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. -
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. -
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. -
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. -
WATCH DISPLAY TIMESETTING INSTRUCTION MANUAL IMPORTANT Stauer Automatic Tourbillon Watch the CONSTRUCTION TOURBIL
WATCH DISPLAY TIMESETTING position I. The crown must remain in TOURBILLON WATCH position I to resist water. 3. The balance wheel and the escapement are (1)There are 28 jewels in the movement. featured through a special cut-away window (2)This automatic watch features the gener- XII (B) (part D). You can view this amazing timing XI I al functions of minute and hour, as well This watch features minute and hour mechanism in action! The balance wheel (A) II as the unique function of tourbillon. X 1 2 hands as well as a unique cut-away and escapement do not require setting and III XI (C) window displaying the balance wheel will continue to keep motion while watch is (3)There is no need to hand wind a and the escapement in a rotating cage. sufficiently wound. Tourbillon watch if already fully wound IIII and worn daily. VIII (D) 1. Locate the crown on your Stauer watch (above diagram part C). Before the watch is worn for the first time, wind the crown by hand, ten (10) cycles by rolling the crown A - HOUR HAND clockwise (away from you) while in posi- B - MINUTE HAND tion I. Please note the two crown positions C - CROWN (I-II) in above watch illustration. D - BALANCE WHEEL / 2. To set the time, pull the crown out to posi- ESCAPEMENT WINDOW tion II, which will allow you to position watch hands for proper time selection. Once time is set, push the crown back into THE CONSTRUCTION IMPORTANT A Watch Winder is a great investment to ensure all of your Stauer wristwatches are Material of case, case back and buckles: keeping correct time and ready for you All stainless steel • Please remember to wear your Stauer watch at any time! Take advantage of our Watch each day to ensure its lifelong accuracy and Dial: White dial, blue stainless steel hands.