Joseph Needham's Research on Chinese Machines in the Cross-Cultural History of Science and Technology
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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. -
A Brief History of the Great Clock at Westminster Palace
A Brief History of the Great Clock at Westminster Palace Its Concept, Construction, the Great Accident and Recent Refurbishment Mark R. Frank © 2008 A Brief History of the Great Clock at Westminster Palace Its Concept, Construction, the Great Accident and Recent Refurbishment Paper Outline Introduction …………………………………………………………………… 2 History of Westminster Palace………………………………………………... 2 The clock’s beginnings – competition, intrigues, and arrogance …………... 4 Conflicts, construction and completion …………………………………….. 10 Development of the gravity escapement ……………………………………. 12 Seeds of destruction ………………………………………………………….. 15 The accident, its analysis and aftermath …………………………………… 19 Recent major overhaul in 2007 ……………………………………………... 33 Appendix A …………………………………………………………………... 40 Footnotes …………………………………………………………………….. 41 1 Introduction: Big Ben is a character, a personality, the very heart of London, and the clock tower at the Houses of Parliament has become the symbol of Britain. It is the nation’s clock, instantly recognizable, and brought into Britain’s homes everyday by the BBC. It is part of the nation’s heritage and has long been established as the nation’s timepiece heralding almost every broadcast of national importance. On the morning of August 5th 1976 at 3:45 AM a catastrophe occurred to the movement of the great clock in Westminster Palace. The damage was so great that for a brief time it was considered to be beyond repair and a new way to move the hands on the four huge exterior dials was considered. How did this happen and more importantly why did this happen and how could such a disaster to one of the world’s great horological treasures be prevented from happening again? Let us first go through a brief history leading up to the creation of the clock. -
Clock Tower STEM in A
build a clock tower Are you ready to use the Engineering Design Process? Engineers follow this process when they’re creating new products or designing solutions to problems. It’s a set of steps that focuses on examining a problem, brainstorming solutions, and testing them out. Engineers don’t always follow the steps in perfect order, and they often repeat a step more than once before they reach a solution that works. The Goal: Solve a design problem by building a clock tower prototype. Paper what you need: Pen or pencil Glue or tape Scissors Cardboard or empty cereal boxes Any additional craft supplies you want to use (Examples: Popsicle sticks, straws, pipe cleaners, etc.) The Design challenge: You are a timekeeper whose job is to take care of your town’s clock tower. You have noticed that the tower has become shaky and there is a crack in the clock face. Create a design for a new clock tower that will be more sturdy. It should also have a clock face that you can remove in sections so that you can clean it. Build a clock tower with a clock face that can be removed in four sections without making the tower fall. build a clock tower CONt. design it Gather all of your materials and examine them. Think about how you might use each of them to build your clock tower. Architects draw blueprints of their buildings before they build them. A blueprint is a drawing of what you want your construction to look like, and it helps you plan how you are going to build something. -
The Clock Tower
Fondazione Musei Civici di Venezia — The Clock Tower ENG The Clock Tower The Clock Tower is one of the most famous architectural landmarks in Venice, standing over an arch that leads into what is the main shopping street of the city, the old Merceria. It marks both a juncture and a division between the various architectural components of St. Mark’s Square, which was not only the seat of political and religious power but also a public space and an area of economic activity, a zone that looked out towards the sea and also played a functional role as a hub for the entire layout of the city. In short, the Tower and its large Astronomical Clock, a masterpiece of technology and engineering, form an essential part of the very image of Venice. THE HISTORY As is known, the decision to erect a new public clock in the St. Mark’s area to replace the inadequate, old clock of Sant’Alipio on the north-west corner of the Basilica – which was by then going to rack and ruin – predates the decision as to where this new clock was to be placed. It was 1493 when the Senate commissioned Carlo Zuan Rainieri of Reggio Emilia to create a new clock, but the decision that this was to be erected over the entrance to the Merceria only came two years later. Procuratie Vechie and Bocha de According to Marin Sanudo, the following year “on 10 June work Marzaria began on the demolition of the houses at the entrance to the Merceria (…) to lay down the foundations for the most excellent clock”. -
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. -
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 ............................................................................................. -
Holy Coverings in the Tareq Rajab Museum the Origin of the Tradition of Covering the Ka'aba with Cloth Is Lost In
About the journal Contents 02 18 April 2011 The Journey to the Centre Aly Gabr 09 9 May 2011 China and the Islamic World: The evidence of 12th and 13th century Northern Syria Martine Muller-Weiner 22 26 September 2011 Holy Coverings in the Tareq Rajab Museum Ziad T Alsayed Rajab 27 17 October 2011 A Brief History of the Ismaili D’awa Adel Salem al-Abdul Jader 31 28 November 2011 The Kingdom of Saba: Current Research by the German Archaeological Institute in South Arabia (Yemen) Iris Gerlach 38 5 December 2011 The Oriental Pearl in the Maritime Trade Annie Montigny 43 13 December 2011 Raili and Reima Pietilä Jarno Paltonen 49 9 January 2012 Islamic Heritage in Bosnia and Herzegovina Kenan Musić This publication is sponsored in part by: LNS 1785 J Fabricated from gold, worked in kundan technique and set with rubies and emeralds Height 9 mm; diameter 100 mm India, Mughal, c. 1st quarter 17th century AD Hadeeth ad-Dar 1 Volume 37 The Journey to the Centre be performed in congregation in a mosque although as opposed to a physical one, meaning that he the whole earth that we know is a potential place for employed his intuition with what he dealt with. the performance of that daily activity. This notion He saw himself as a tripartite being composed of makes the earth a potential vast mosque. body (jism), soul (nafs), and spirit (rouh). Without the union of these three parts he believed he/ I am sure that the question arises in some of she would be demeaned in his/her existence and your minds: does God really expects us to show unbalanced. -
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. -
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 . -
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. -
Winding the Harper County Courthouse Clock… We’Ll Assume You Had a Key and Took the Elevator to the 5Th Floor
Winding the Harper County Courthouse Clock… We’ll assume you had a key and took the elevator to the 5th floor. That’s the easy part of the job. Now you start up the steps into the Clock Tower. You go up the first flight of stairs to a landing. The first flight of steps to the landing is the longest flight. Then it is a quick trip up to the Pendulum Room. There isn’t a lot to see in the Pendulum Room. The pendulum itself is enclosed in an unassuming white wooden box. You look past it to the steps up to the clockworks. As you climb the last steps you find the clockworks are enclosed in their own Clock Room, a room in a room. Wondering what you have gotten into, you pry open the door and get your first glimpse of this magnificent machine. You first notice the long wooden pendulum rod sticks through the floor and is really the only piece you see moving. You see lots of gears and cables running through the roof of the room. The cables run to the weights that power the clock. Using the large wood- handled crank, you wind the chime cable on the spool with over 120 turns of the handle. The crank comes off and you move it to the other side of the pendulum rod to wind the clock itself. That usually only takes 20-30 turns, but they are tougher turns. Finished winding, you get the chance to look over the clockworks a little.