Servicing a Platform: the Basics
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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. -
Collectable POCKET Watches 1750-1920
cOLLECTABLE POCKET watches 1750-1920 Ian Beilby Clocks Magazine Beginner’s Guide Series No 5 cOLLECTABLE POCKET watches 1750-1920 Ian Beilby Clocks Magazine Beginner’s Guide Series No 5 Published by Splat Publishing Ltd. 141b Lower Granton Road Edinburgh EH5 1EX United Kingdom www.clocksmagazine.com © 2017 Ian Beilby World copyright reserved ISBN: 978-0-9562732-4-6 The right of Ian Beilby to be identified as author of this work has been asserted in accordance with the Copyright, Designs and Patents Act 1988. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the publisher. 2 4 6 8 10 9 7 5 3 1 Printed by CBF Cheltenham Business Forms Ltd, 67 Hatherley Road, Cheltenham GL51 6EG CONTENTS Introduction 7 Chapter 1. The eighteenth century verge watch 13 Chapter 2. The nineteenth century verge watch 22 Chapter 3. The English cylinder and rack lever watch 36 Chapter 4. The English lever watch 42 Chapter 5. The Swiss lever watch 54 Chapter 6. The American lever watch 62 Chapter 7. The Swiss cylinder ladies’ fob watch 72 Chapter 8. Advice on collecting and maintenance 77 Appendix 1. Glossary 82 Appendix 2. Further reading 86 CLOCKS MAGAZINE BEGINNER’S GUIDE SERIES No. 1. Clock Repair, A Beginner’s Guide No. 2. Beginner’s Guide to Pocket Watches No. 3. American Clocks, An Introduction No. 4. What’s it Worth, Price Guide to Clocks 2014 No. -
Physics 2305 Lab 11: Torsion Pendulum
Name___________________ ID number_________________________ Date____________________ Lab partner_________________________ Lab CRN________________ Lab instructor_______________________ Physics 2305 Lab 11: Torsion Pendulum Objective 1. To demonstrate that the motion of the torsion pendulum satisfies the simple harmonic form in equation (3) 2. To show that the period (or angular frequency) of the simple harmonic motion of the torsion pendulum is independent of the amplitude of the motion 3. To make measurements to demonstrate the validity of equation (6), which relates the angular frequency of motion to the torsion constant and the moment of inertia of the torsion pendulum Useful background reading Young and Freedman, section 13.1, 13.2, 13.4 (the “angular SHM” section, specifically) Introduction A torsion pendulum is shown schematically to the right. A disk with moment of inertia I0 is fastened near the center of a long straight wire stretched between two fixed mounts. If the disk is rotated through an angle θ and released, the twist in the wire rotates the disk back toward equilibrium. It overshoots and I 0 oscillates back and forth like a pendulum, hence the name. Torsion pendulums are used for the timing element in some θ clocks. The most common variety is a decorative polished brass mechanism under a glass dome. You may have seen one. The balance wheel in an old fashioned mechanical watch is a kind of torsion pendulum, though the restoring force is provided by a flat coiled spring rather than a long twisted wire. Torsion pendulums can be made very accurate and have been used in numerous precision experiments in 1 physics. -
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. -
Times Horological
TIMES TM ADVANCING THE ART, SCIENCE & BUSINESS OF HOROLOGY February 2013 HOROLOGICAL Burnishing a Ball Bearing Setting AMERICAN WATCHMAKERS- CLOCKMAKERS INSTITUTE This Month’s Focus: Repair Insights 21st Century Workshop: Lewis Diamonds & Timepieces The Omega Oscillating Weight, Caliber 1150 Special Watch Service Aids, Part 2 Silence is Golden for ETA: The Talking Number System Clockmaking—The Tools, Part 2 NEW!NEW! QualityQuality ToolTool && DieDie SetsSets 34-Piece Instrument Mid-Size Tap & Die Set Set of eight HSS dies and 24 steel taps with three grooves. Con- tains sizes: 1.00, 1.20, 1.40, 1.70, 2.00, 2.30, 2.60, and 3.00mm. Includes three each of three-step taps and one 16mm die per size, a double-handled tap holder and a double-handled die holder. Use taps with one stripe to start the hole, taps with two stripes to shape the hole, and taps with no stripes to finish the hole. All the taps have a 2.5 or 3mm square drive end. Made in Germany. BG2776-16 Mid-Size Tap & Die Set $ 399.00 49-Piece Watchmaking Tap & Die Set Complete set of 12 steel dies and 36 taps. Contains 12 sizes: .40, .50, .65, .70, .80, .90, 1.00, 1.10, 1.20, 1.30, and 1.40mm. Includes three taps and one 8mm 2-hole die per size and a double-handled die holder. Taps have three grooves and can be held with a 1.5mm pin vise. Made in Germany. BG2776-8 Watchmaking Tap & Die Set $ 595.00 Taps Only Assortment BG1967-ASST Set of 10 Taps .40—1.4mm $ 79.00 Jules Borel & Co. -
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. -
Times Horological
TM ADVANCING THE ART, SCIENCE & BUSINESS OF HOROLOGY Times November 2011 Horological AMERICAN WATCHMAKERS- CLOCKMAKERS INSTITUTE This Month’s Focus: Technical Insights How to Safely Store and Transport Batteries Time-Saving Shop Aid for Clockmakers Building the Overcoil Hairspring and Timing Results Tips for Working with the Rolex 300 Clasp Pin Industry News r Compressors Jun Ai e for Upgrad available Int cing an r now rodu n filte th micro New 1/100 AC6409/4071055 .01 Micron Filter Now with 2 filters! $99.00 .01 micron & 5 microns .01 micron filter 5 micron filter Provide greater protection for AC6411 your waterproof testers Jun Air e Jun Air compressor now has two air lters. A .01 $1495.00 micron air lter has been added to the 5 micron lter. Protect your Witschi Proofmaster S and Proofmaster M from contamination! Create pressure e ciently using the Jun Air. Tank pressurizes to 175 psi or 12 BAR. is silent air Already own a Jun Air? compressor is recommended for use with the Witschi Add the .01 micron lter for only $99.00. Proofmaster S and Proofmaster M waterproof testers. TS-PROOFMASTER M TS-PROOFMASTER S Witschi Proofmaster M Witschi Proofmaster S Call Call . Pressurize from .2 to 10 BAR . Pressurize from .2 to 10 BAR . Set vacuum to -.7 BAR to detect small and large leaks . Set vacuum to -.7 BAR to detect small and large leaks . Leak nder program pressurizes case to determine the leaking . Leak nder program pressurizes case to determine the point when placed under water leaking point when placed under water . -
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"). -
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. -
Watches Wanted HAMILTON ELECTRIC REPAIRMAN Seeks Parts! Movements, Balance Completes, Contact Wires, Etc
MORE SELLING POWER FOR YOUR STORE This FabulousKrelsler Display will help you sell more KEYSTONE PRICING* Watchbands in the $5.95 to $27.95 retail range than you FOR EXTRA PROFITS! ever thought possible. It is yours FREE when you order SHARP® either of the Best Seller Assortments below. SHARP® QUALITY No Strings! No Hidden Costs! Yours Free! * Japanese movements * Superior quality control in all SHARP components Takes Less Space! * Exacting quality controls at 1 1 Takes only 10 /2" x 10 /2" factory and distribution centers of counter space! * 5 Year Limited Warranty for every style Pllferproofl Protects your profits. SHARP® PRODUCT Bands can't be removed * From $9.95 to $79.95 until you release the lock! * Analog Quartz - over 200 models * High Tech - over 30 top sellers Plan-0-Grammed Stocki * Many basic fast tum economy Style number behind models for promotion every band on display * New exquisite selected tells you what you sell and what you need! distribution models Shows 24 Men's, SHARP® ADVERTISING 24Women'sl • Local market support See thru package shows • Network and local t. v. style and price. Helps • Print campaigns in Time/People customers select what and other top magazines they want! *KEYSTONE PRICING! 10-Piece minimum (less than 10 "Best Sellers pieces billed at less 40 and 10) Sell Best!" DISPLAYS AVAILABLE The K-10498 Two-Tier Display Assortment of 48 different best Light and motion displays for 50 selling styles consists of 60 men's and 36 women's two-tone, and 90-piece units yellow and stainless steel from $6.95 to $27.95 retailers. -
Chronoskop CHR-9 User Manual
CHRONOSKOP CHR-9 Digital watch timing machine ENGLISH Instruction Manual © 2017 www.CHRONOSKOP.com Table of Contents 1. INTRODUCTION .......................................................................................................................... 5 1.1. GENERAL INFORMATION ON THE DEVICE FUNCTION ................................................................ 5 1.2. CONNECTION LINES ..................................................................................................................... 7 1.3. TOUCHDISPLAY ............................................................................................................................ 8 1.1. COMMISSIONING .......................................................................................................................... 8 1.2. BATTERY MODE ............................................................................................................................ 8 2. THEORETIC BASICS .................................................................................................................. 9 2.1. SCHLAGZAHL / GANG / PERIODENDAUER .................................................................................. 9 2.2. ABFALLFEHLER (REPÈRE) .......................................................................................................... 9 2.3. AMPLITUDE ................................................................................................................................ 10 3. MEASUREMENT WITH THE TIMEGRAPHER ................................................................. -
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 ...,.,.,.