DOCSLIB.ORG

Horological TIMES July 1999

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Horological TIMES July 1999 HoROLOGICAL TIMES July 1999 American Watchmakers-Clockmakers Institute MOVEMENT SALE! Low prices on the popular calibers from the •• originator of quartz movement replacements. • + MODEL ~ IZEI FEATURES SALE PRICE MODEL SIZE/ FEATURES SALE PRICE Akita 8JX, (6DB, 5FB) 631• X 8, SIS $5 .95 Hattori PC11 5'h X 6'1,, SIS $5 .95 ETA 801 .004 5'1, x 6'1,, Reg 6.95 Hattori PC21 631• X 8, SIS 4.95 ETA 803.114 8'1,L, Cal 7.95 Hattori VF01 631• X 8, 515 5.50 ETA 805.114 11 'hl, SIS, Cal (3 or 6 o'clock) 6.95 Hattori VX10/VX11 S'h x 6'1•, Reg or Sl5 7.50 3 ETA 901.005 5'h x 6'1•, Reg, (metal plates) 7.50 Hattori Y121 6 1• X 8, 515 4.95 ETA 902.005 6'1•x 8, Reg 4.50 Hattori YL60 4 X 6L 12.95 ETA956.114 7'1•L, SIS, Cal (3 or 6) 10.50 (replaces 1NOO & Y150) ISA 369 6'1· X 8, 51S 5.50 Hattori VX43 11'h L, 51S, Day-Date 9.95 (replaces 7N43 & 8123) ISA 1198112 11'/zl, Sl5 5.50 Harley 315 11'hl, Sl5, Cal 6.95 ISA 1198132 11'/zl, Sl5, Cal 5.95 Harley 751/753 5'h x 631,, Reg or SIS 7.95 • • Dumont #3C Tweezer FREE with purchase of any 12 movements. (An $11.95 Value!) II Butterfly" l A-T POCKET WATCH BUCKLES SPRING BARS DISP AY NEw N~'ltl DOME Ladies (#325L) $795 ~ #82.2001 $3495 Mens (#325M) 12 or more at $895 Only 1.0mm thick! These new stainless steel spring bars are the $535 thinnest available and feature each These modern 'deployment' very short ends. Ultra thin and type buckles are very single shoulder type make these popular on many watches. invaluable replacements for Features a dark teakwood base Stainless steel. band and folding clasps on bet­ with a high-gloss finish. Glass ter watches. Kit contains 60 dome measures 3" x 4-1/4" . Compare f<J 20.00 and up pieces (4 each of 15 sizes). Watch is held with a brass stem .for or(gi11al! Swiss made. mounted in the base. VOLUME 23 HoROLOGICALN NUMBER 7 TIMES CONTENTS JULY 1999 An Official Publication of the American Watchmakers-Ciockmakers Institute FEATURE ARTICLES EDITORIAL & EXECUTIVE OFFICES AWl Central, 701 Enterprise Drive, Harrison, OH 45030 Fred 5. Burckhardt- Honored as a Fellow of the AWl, By Ewell D. Hartman 8 Phone: (513) 367-9800 Fax: (513) 367-1414 A Gear Cutter Centering Device for the Watchmakers' Lathe, E-mail: [email protected] 14 Office Hours: Monday-Friday 8:00AM to 5:00 PM (EST) Part 2, By Robert D. Porter Closed National Holidays Working With Bushings, By David J. Carlson 38 William J. Ewbank: Editor-in-Chief Donna K. Baas: Managing Editor, Advertising Manager Katherine J. Ortt: Associate Editor, Layout/Design Associate William J. Ewbank: Executive Director COLUMNS James E. Lubic, CMW: Education & Technical Director Technically Watches, By Archie B. Perkins 18 Nancy L. Wellmann: General Manager Thomas J. Pack: Finance Director The Winding and Setting Mechanisms (Continued), Part 14 Stewart Lesemann: Assistant Instructor A Practical Course in Clock Repair, By John P. Kenyon 22 Sharon McManus: Membership Coordinator Mary Beth Huff: Shipping Coordinator Movement Disassembly and Examination Anthony W. DePrato: Audiovisual Manager Repeater, Petite and Grande Sonnerie Clocks, By Leo A. Jaroslaw Kelley Knight: Education Coordinator 28 Stacey Hauck: Receptionist/Secretary Seth Thomas Hall Clock, Part 45 HOROLOGICAL TIMES ADVISORY COMMITTEE As a Clockmaker Turns, By J.M. Huckabee 32 Ron DeCorte, CMW: Chairman The Magic Center Finder, Part 2 Roy Hovey Stanley McMahan Robert Ockenden, CMC AWl OFFICERS DEPARTMENTS David A. Christianson, CMW, CMEW: President Ron DeCorte, CMW: First Vice President President's Message, By David A. Christianson 2 Robert D. Porter, CMW: Second Vice President Fred S. Burckhardt, FAWI: Secretary Executive Director's Message, By William J. Ewbank 2 Gerald G. Jaeger, CMW, CMEW, FAWI: Treasurer Questions & Answers 4 AWl DIRECTORS Alice B. Carpenter, CMW, CMEW Ask Huck, By J.M. Huckabee 6 Joseph L. Cerullo, CMW, CMC Rock Quarry, By Fred S. Burckhardt Charles Cleves 12 Wes Door, CMW Bulletin Board 21 Henry Frystak, CMW Tamara Houk Book Reviews, By Robert D. Porter 27 Jack Kurdzionak William 0. Smith, Jr., CMW, CMC, FAWI AWl Material Search 31 Milton C. Stevens, FAWI Sue Ann Wysong, CMEW AWl New Members 37 Dennis J. Warner: Affiliate Chapter Director From the Workshop, By Jack Kurdzionak 42 Kenneth J. Pell: Research & Education Council Director Charles Cleves: Immediate Past President Classified Advertising 44 FELLOWS American Watchmakers-Ciockmakers Institute Advertisers' Index 48 Robert F. Bishop J. M. Huckabee James H. Broughton Gerald G. Jaeger Fred S. Burckhardt Robert A. Nelson George Daniels *Hamilton E. Pease *Henry B. Fried Archie B. Perkins SPECIAL INTEREST Josephine F. Hagans William 0. Smith, Jr. Voting Results 26 *Orville R. Hagans Milton C. Stevens Ewell D. Hartman *Marvin E. Whitney 1999 Proposed Amendments to the AWl Constitution Harold J. Herman 'Deceased Reprinting and reproduction is prohibited without written per-mission from the American Watchmakers-Ciockmakers Institute. Copyright ©1999 by the American Watchmakers-Ciockmakers Institute. HOROLOGICAL TIMES (ISSNO 145-9546) is published monthly and copyrighted by the American Watchmakers Institute, 701 Enterprise Drive, Harrison, OH 45030-1696. COVER Subscription price for the public is $45.00 per year ($4.50 per copy) in the United States and $50 00 per year ($5.50 per copy outside the U.S), members subscription This month's cover features a is $14.63 which is included with annual dues of $45 00. Periodicals postage paid at Hamson, OH 45030 and additional entries. POSTMASTER: Send address changes caricature of Fred S. Burckhardt, to HOROLOGICAL TIMES, 701 Enterprise Drive, Hamson, OH 45030-1696 the 1999 recipient of "Fellow AWl" President's Message David A. Christianson Twice a year your Board of Directors gathers to conduct the business of A WI at the mid­ year meeting in January and at the annual meeting in June. In January of this year it was a real pleasure to preside over a Board that was excited about the future of A WI and the direction we are taking. A new culture of operation is developing within our Board based on collaboration, cohe­ siveness, and trust. Two very important points came out of the meeting that are responsible for this new culture of operation: 1. The understanding that the Board of Directors controls the Institute and the direction that it takes, with the staff (headed by the Executive Director) providing administrative services for the Board. The Board, however, receives its power from the membership, and its own direction from the various committees of A WI. These committees are made up of members of A WI. What this boils down to is: the members are the heart and soul of AWl, and these committees are our source of ideas and direction. There is good reason why the "President's Message" over the past year has concentrated on the functions of the various committees. These committees are the strength of A WI. Without strong committees, A WI has no future. 2. The AWl Mission Statement that the Board of Directors adopted in January states that the American Watchmak­ ers-Clockmakers Institute is the premier international organization dedicated to preserving and promoting the highest stan­ dards of workmanship in the horological crafts. It is the role of A WI to set the standard of excellence in both the instruction and practice of quality horological repair and restoration work worldwide. All of our committees are working toward these ends; it is the first time we have had a clear understanding of who we are and where we're going. As we go along you'll be able to see some very clear and tangible results. I hope you were moved to be a part of one of these committees. If you weren't, you'll have the opportunity again. The key to the future of AWl is in its members. We're striving to be a member-driven organization where the members will have every opportunity to make A WI into the organization that we all want it to be. Executive Director's Message William J. Ewbank One of my personal heroes was Ulysses S. Grant. I first came to appreciate the man in my extensive readings about the American Civil War. General Grant is most famous for his exploits as a soldier. Few people are aware that his autobiography is considered one of the great works of Ameri­ can literature. Grant wrote the book in a desperate race against time. The last chapter of the book was finished in a painful scrawl just hours before the General succumbed to a long, painful battle with throat cancer. I am saddened to report that another gallant old soldier has gone to his reward. Colonel Roy Hovey, ret. AWl's lathe 1 course instructor for many years, lost his battle with cancer Tuesday, June l5 h. Like General Grant, Roy's last weeks were spent assembling a legacy. The complete Roy Hovey lathe courses, including all equipment, parts, tools, course materials and the intellectual property created by Roy to support the program, have been transferred to the American Watchmakers-Clockmakers Institute for a very fair settlement value. The Roy Hovey lathe program will continue to benefit A WI and its members for many years to come. Roy Hovey was the first A WI instructor and member that I met. When I received a tour of the facilities on my first day at work in the summer of 1996, Roy happened to be teaching his introductory 12-day lathe course to Academy and Project Extend students.
Load more

Recommended publications
  • The Case of Switzerland and the World Watch Industry *
    469 Technological discontinuities and flexible production networks: The case of Switzerland and the world watch industry * Amy Glasmeier tain and augment their competitiveness in a global Unrr~rs~t~of Texas at Austin, Texas, USA economy. On the eve of the electronics revolution, the Swiss watch production system, centered in the mountainous Jura region, was flexible, cost The twentieth-century history of the Swiss watch industry effective, and extremely profitable. Both horizon- illustrates how cultures and industrial production systems ex- tally and vertically disintegrated, the Swiss system perience great difficulty adapting to external change at differ- offered enormous variety while maintaining qual- ent points in time. The current emphasis on production net- ity and timeliness of delivery. “The multiplicity of works - unique reservoirs of potential technological innovation realized through cooperation rather than competition among enterprises, and the competition and emulation firms - lacks a detailed appreciation of historic networks, and that characterized the industry, yielded a product in particular their fragile character in times of economic of superior quality known the world over for high turmoil. While networks can and do promote innovation within fashion, design, and precision” [21, p. 481. an existing technological framework, historical experience sug- Beginning in the 1970s when foreign competi- gests their fragmented, atomistic structure is subject to dis- organization and disintegration during periods of technological tion hurdled technological frontiers in watch change. An exclusive focus on “production” ignores other movements, advancing from mechanical to elec- constraints that are powerful forces governing the reaction tric, electronic, digital and finally quartz technol- abilities of regions. Previous research has largely relied on a ogy, the Jura’s undisputed dominance ended.
    [Show full text]
  • A History of the Citizen Watch Company, from the Pages of Watchtime Magazine
    THE WORLD OF FINE WATCHES SPOTLIGHT www.watchtime.com A HISTORY OF THE CITIZEN WATCH COMPANY, FROM THE PAGES OF WATCHTIME MAGAZINE CCIITTIIZZEENN THe HisTory of ciTizen One of the original Citizen pocket watches that went on THE sale in December 1924 CITIZEN WATCH STORY How a Tokyo jeweler’s experiment in making pocket watches 84 years ago led to the creation of a global watch colossus n the 1920s, the young Emperor of Japan, than the imports. To that end, Yamazaki found - Goto. The mayor was a friend of Yamazaki’s. Hirohito, received a gift that reportedly de - ed in 1918 the Shokosha Watch Research Insti - When the fledgling watch manufacturer was I lighted him. The gift was from Kamekichi tute in Tokyo’s Totsuka district. Using Swiss ma - searching for a name for his product, he asked Yamazaki, a Tokyo jeweler, who had an ambi - chinery, Yamazaki and his team began experi - Goto for ideas. Goto suggested Citizen. A tion to manufacture pocket watches in Japan. menting in the production of pocket watches. watch is, to a great extent, a luxury item, he ex - The Japanese watch market at that time By the end of 1924, they began commercial plained, but Yamazaki was aiming to make af - was dominated by foreign makes, primarily production of their first product, the Caliber fordable watches. It was Goto’s hope that every Swiss brands, followed by Americans like 16 pocket watch, which they sold under the citizen would benefit from and enjoy the time - Waltham and Elgin. Yamazaki felt the time brand name Citizen.
    [Show full text]
  • Mini Quartz Clock Movements
    Mini Quartz Clock Movements • 10 Year Warranty • Step Second Hand • Dimensions: 2-1/8"W x 2-1/8"H x 5/8"D • Runs on 1 "AA" Size Battery • American "I" Shaft - Diameter 5/16" • Free Set Of Hands and • Front Loading Hanger Mounting Hardware With • Accurate Within 2 Minutes A Year Each Clock Movement • Fits 3" Diameter Hole • Made in USA 1. Drill a 3/8" hole through the material you are working with and insert the movement. 2. Slide brass washer over shaft. 3. Attach dial mounting hex nut. 4. Gently press hour hand onto shaft at 12:00 position. 5. Place minute hand over shaft at 12:00 position. 6. Gently screw minute nut in place. 7. Press on second hand at 12:00 position. 8. Screw on cap nut if no second hand is used. Mini Movements Shaft Length Selecting the Proper Shaft Length Dials B A P r i c e E a c h P e r P k g O f Proper shaft length is important to ensure Stock# up to Thread Total 1 3 10 50 100 sufficient clearance when going through your dial Q-11 1/8" thick 3/16" 17/32" 4.95 4.23 4.45 3.80 4.25 3.63 3.95 3.38 3.75 3.21 board and when using a glass front on your clock. Q-12 1/4" thick 5/16" 5/8" 4.95 4.23 4.45 3.80 4.25 3.63 3.95 3.38 3.75 3.21 Overall Length (A) is measured from the tip of Q-13 3/8" thick 7/16" 3/4" 4.95 4.See23 4.4 website5 3.80 4.25 3for.63 3current.95 3.38 3.75 3.21 the hand shaft to the movement cast.
    [Show full text]
  • SETTING up and MOVING a PENDULUM CLOCK by Brian Loomes, UK
    SETTING UP AND MOVING A PENDULUM CLOCK by Brian Loomes, UK oving a pendulum This problem may face clock with anchor the novice in two different Mescapement can ways. Firstly as a clock be difficult unless you have that runs well in its present a little guidance. Of all position but that you need these the longcase clock to move. Or as a clock is trickiest because the that is new to you and that long pendulum calls for you need to assemble greater care at setting it in and set going for the very balance, usually known as first time—such as one you have just inherited or bought at auction. If it is the first of these then you can attempt to ignore my notes about levelling. But floors in different rooms or different houses seldom agree Figure 1. When moving an on levels, and you may eight-day longcase clock you eventually have to follow need to hold the weight lines through the whole process in place by taping round the of setting the clock level accessible part of the barrel. In and in beat. a complicated musical clock, Sometimes you can such as this by Thomas Lister of persuade a clock to run by Halifax, it is vital. having it at a silly angle, or by pushing old pennies or wooden wedges under the seatboard. But this is hardly ideal and next time you move the clock you start with the same performance all over again. setting it ‘in beat’. These My suggestion is that you notes deal principally with bite the bullet right away longcase clocks.
    [Show full text]
  • Mechanical Parts of Clocks Or Watches in General
    G04B CPC COOPERATIVE PATENT CLASSIFICATION G PHYSICS (NOTES omitted) INSTRUMENTS G04 HOROLOGY G04B MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built- in means operating any device at pre-selected times or after predetermined time intervals G04C 23/00; clocks or watches with stop devices G04F 7/08) NOTE This subclass covers mechanically-driven clocks or clockwork calendars, and the mechanical part of such clocks or calendars. WARNING In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. Driving mechanisms 1/145 . {Composition and manufacture of the springs (compositions and manufacture of 1/00 Driving mechanisms {(driving mechanisms for components, wheels, spindles, pivots, or the Turkish time G04B 19/22; driving mechanisms like G04B 13/026; compositions of component in the hands G04B 45/043; driving mechanisms escapements G04B 15/14; composition and for phonographic apparatus G11B 19/00; springs, manufacture or hairsprings G04B 17/066; driving weight engines F03G; driving mechanisms compensation for the effects of variations of for cinematography G03B 1/00; driving mechnisms; temperature of springs using alloys, especially driving mechanisms for time fuses for missiles F42C; for hairsprings G04B 17/227; materials for driving mechnisms for toys A63H 29/00)} bearings of clockworks G04B 31/00; iron and 1/02 . with driving weight steel alloys C22C; heat treatment and chemical 1/04 .
    [Show full text]
  • This Is Part 1 of 2 on Servicing the 400-Day (Anniversary) Clock
    1 This is part 1 of 2 on servicing the 400-day (Anniversary) clock. This article will be a 2-part series devoted to the servicing of the 400-day or Anniversary clock by Michael P. Murray. Mike was AWI’s 400-day clock repair bench course Instructor. The 400-day course is a 2-day “hands on” affair with the students working on the clock that they bring and Mike can accommodate anywhere from 8 to 16 students. For more information about Mike please see his Website at: http://www.atmosman.com/400dayin.html . This article is copyrighted to the author and references. Members, In my initial series on the 400-day clock, we will cover final assembly right through final timing. My assumption is that we all know the basics but it’s the last seemingly basis steps where most of the troubles occur when servicing this slightly temperamental timepiece. My goal in writing these articles is to get you past many of the pitfalls and erroneous assumptions. There are no real “secrets” and I hope to enable anyone who reads this by dispelling any fears or myths. So if you’re not currently servicing the 400-day, I urge you to give them another try. Series Assumptions A quick mention of what I expect as the “basis”. You’re checked for and corrected any pivot, tooth, or gear depthing problems (depthing problems are extremely rare), used a mainspring winder to remove and install the mainspring, cleaned and lubricated same, pegged all pivot holes, polished all pivots and pivot shoulders, polished the anchor pin and the inside of the fork tines, and cleaned all parts.
    [Show full text]
  • INSTRUCTIONS for ANALOGUE QUARTZ and MECHANICAL WATCHES ✩ Some Models Have a Screw Down Crown Instead of a Standard Crown
    INSTRUCTIONS FOR ANALOGUE QUARTZ AND MECHANICAL WATCHES ✩ Some models have a screw down crown instead of a standard crown. •How to unlock the crown: Unscrew the crown by turning it counterclockwise. Then, pull it out for time/calendar setting. Your watch is one of the following six types of analogue quartz and mechanical watches. •How to lock the crown: Push the crown back to the normal position. Then, turn it clockwise while pressing it until it Before using your new watch, please read the instructions pertaining to your watch type; they locks in place. will help you to get the best out of the watch. • When using the watch in water: Before using the watch in water, make sure the crown is screwed in completely. Do not operate the crown when the watch is wet or in water. A Two hands without calendar D Three hands without calendar ■ Calibre number of your watch Please check the case back of your watch to find the calibre number inscribed on it, B Two hands with date calendar E Three hands with date calendar and read the instructions pertaining to your watch calibre number. It is a 4-digit C Two hands with F Three hands with number to the left of the hyphen mark. day and date calendar day and date calendar MECHANICAL WATCHES : Cal. 4206, 4207, 4217, 7002, 7009, 7019, 4R15, 4R16, 4S15, 7S25, 7S26, 7S35, 7S36, 7S55 ANALOGUE QUARTZ WATCHES : All other calibres [DISPLAY AND HANDS] Hour hand Minute hand Crown ✩ Calibre No. Date Second hand Day 4 5 ■ How to start a mechanical watch Note: When setting the minute hand of a quartz watch, advance it to a few minutes ahead of the time and then turn it back to the exact time.
    [Show full text]
  • PARTS LIST / TECHNICAL GUIDE Automatic Cal
    PARTS LIST / TECHNICAL GUIDE Automatic Cal. 4R35B/4R36A [SPECIFICATIONS] Cal. No. Item 4R35B/4R36A The figures below are Cal. 4R36A. Movement size • Diameter • 3 hands Outside: Ø 27.4 mm (hour, minute and second hands) Casing: Ø 27.0 mm • Day and Date indication • Height: 5.32 mm 4R35B 4R36A Outside diameter Ø 27.4 mm Ø 27.4 mm Movement size Casing diameter Ø 27.0 mm Ø 27.0 mm Height 5.32 mm 5.32 mm Driving system Automatic winding with manual winding mechanism • 3 hands • 3 hands Time indication (Hour, Minute, and Small second hands) (Hour, Minute, and Small second hands) • Date indication • Day and date indication • Date correction function • Date correction function • Day correction function Additional function • Second hand stop function • Second hand stop function Normal position Manual winding (clockwise only) Manual winding (clockwise only) Crown 1st click position Date setting (counterclockwise) Date setting (counterclockwise), Day setting operation 2nd click position Time setting (Hour and minute), Second hand stop Vibration per hour 21,600 (6 beats per second) Daily rate worn on the wrist at temperature range Between +45 and -35 seconds between 5 °C and 35 °C) Mainspring wind After 24 hours Fully wind up Loss/Gain up status from fully wind up Dial upward: Dual upward: Standard rate for Testing positions 6 o’clock at the top 9 o’clock at the top measurement T0 (CH) T24 (CH) Measurement (Isochronism (daily rate in ± 20 s/d ± 30 s/d ± 30 s/d fault: T24-T0) seconds: s/d) ± 30 s/d Regulation system ETACHRON System Lift angle of the escapement 53 ° Power reserve From fully wound to stoppage: Approximately 40 hours Number of jewels 24 jewels PARTS LIST Cal.
    [Show full text]
  • 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.
    [Show full text]
  • By Robert H. Croswell a BRIEF HISTORY of AMERICAN CLOCK
    By Robert H. Croswell A BRIEF HISTORY OF AMERICAN CLOCK MAKING The history of timekeeping devices is almost as old as time itself but it was not until about 1658 that the pendulum was introduced as part of the controlling mechanism. Although the name of the inventor is disputed, this improvement revolutionized the construction and accuracy of clocks. During the American colonial period, most clocks were imported from England or France and only the wealthy could afford one. By the mid 18th century numerous American clockmakers were making small numbers of tall case, or “grandfather” clocks. Brass and other materials commonly used in clock making were heavily taxed or just not available in the colonies, so these early clocks were generally made almost entirely of wood and powered by iron weights. Smaller shelf clocks with 1-day (30 hour) wooden movements were produced in fairly large quantities from around 1810 to 1845, after which most clock makers changed over to brass movements. By 1860 iron weights were being replaced by springs as the power source, and smaller clocks, many of them 8-day, were becoming increasingly popular. The last quarter of the 19th century saw many small clock making companies go out of business or be taken over by larger companies. By the year 1900 the vast majority of American clocks were being made by just over a half dozen huge companies. By the 1930s electric clocks had rapidly begun to replace mechanical clocks. CAN AN OLD CLOCK REALLY KEEP GOOD TIME? In order to answer that question one must first consider what is “good time”.
    [Show full text]
  • Topicsinception of the Caliber 9000 Series
    The Miyota Newsletter Vol. 11 June 2018 TOPICSInception of the Caliber 9000 Series Miyota believes then and now that mechanical watches will continue to play a Caliber 9015 role in creating and raising the appeal of wrist watches. Miyota’s Caliber 8200 ・ Mov't size 11 1/2''' Series was first developed 30 years ago. It is a proven and trusted movement ・ Mov't height 3.9mm which is still in demand today. With this in mind, more than a decade ago we ・ 3 hands with date rolled out a project to develop a new movement targeting mid- to high-end ・ Duration time 42 hours ・ 24 jewels watch markets called the Caliber 9000 Series. ・ 28800 vibrations per hour ・ Stop second device ・ Automatic and hand winding Quick Development Philosophy ・ date setting The basic structure of the mechanical watch has barely changed over the past Watch designs using the Caliber 9015 Caliber 9015 product details » several hundred years. If there is a difference among watchmakers, it is their philosophy for design, R&D, manufacturing, quality and other factors. The Caliber 9000 Series is high in precision and durability. It incorporates both Caliber 9039 slimness and beauty in its design. The durability of the movement is realized using a unique mechanism, which Miyota has cultivated over the years. The Low Hand Height movement is only 3.9mm thick and its beautiful finish makes it perfect for see-through case back 450µ watches. It is made using 450µ 450µ Miyota’s mass production 400µ technology which was fostered 1200µ through the production of quartz 900µ movements, so that the 9039 9015 movement can be enjoyed by many users around the world.
    [Show full text]
  • The History of Watches
    Alan Costa 18 January, 1998 Page : 1 The History of Watches THE HISTORY OF WATCHES ................................................................................................................ 1 OVERVIEW AND INTENT ........................................................................................................................ 2 PRIOR TO 1600 – THE EARLIEST WATCHES ..................................................................................... 3 1600-1675 - THE AGE OF DECORATION ............................................................................................... 4 1675 – 1700 – THE BALANCE SPRING ................................................................................................... 5 1700-1775 – STEADY PROGRESS ............................................................................................................ 6 1775-1830 - THE FIRST CHRONOMETERS ........................................................................................... 8 1830-1900 – THE ERA OF COMPLICATIONS ..................................................................................... 10 1900 ONWARDS – METALLURGY TO THE RESCUE? .................................................................... 12 BIBLIOGRAPHY ....................................................................................................................................... 15 Alan Costa 18 January, 1998 Page : 2 Overview and Intent This paper is a literature study that discusses the changes that have occurred in watches over time. It covers mainly
    [Show full text]