TAILIEUCHUNG - An Analysis of the Lever Escapement

Before entering upon our subject proper, we think it advisable to explain a few points, simple though they are, which might cause confusion to some readers. Our experience has shown us that as soon as we use the words "millimeter" and "degree," perplexity is the result. "What is a millimeter?" is propounded to us very often in the course of a year; nearly every new acquaintance is interested in having the metric system of measurement, together with the fine gauges used, explained to him. | Analysis of the Lever Escapement by H. R. Playtner 1 Analysis of the Lever Escapement by H. R. Playtner Project Gutenberg s An Analysis of the Lever Escapement by H. R. Playtner This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at Title An Analysis of the Lever Escapement Author H. R. Playtner Release Date June 30 2007 EBook 21978 Language English Character set encoding ISO-8859-1 START OF THIS PROJECT GUTENBERG EBOOK AN ANALYSIS OF THE LEVER Produced by Sigal Alon Fox in the Stars Laura Wisewell and the Online Distributed Proofreading Team at http Illustration THOMAS MUDGE The first Horologist who successfully applied the Detached Lever Escapement to Watches. Analysis of the Lever Escapement by H. R. Playtner Born 1715--Died 1794. 2 AN ANALYSIS OF THE LEVER ESCAPEMENT BY H. R. PLAYTNER. A LECTURE DELIVERED BEFORE THE CANADIAN WATCHMAKERS AND RETAIL JEWELERS ASSOCIATION. ILLUSTRATED. CHICAGO HAZLITT WALKER PUBLISHERS. 1910. PREFACE. Before entering upon our subject proper we think it advisable to explain a few points simple though they are which might cause confusion to some readers. Our experience has shown us that as soon as we use the words millimeter and degree perplexity is the result. What is a millimeter is propounded to us very often in the course of a year nearly every new acquaintance is interested in having the metric system of measurement together with the fine gauges used explained to him. The metric system of measurement originated at the time of the French Revolution in the latter part of the 18th century its divisions are decimal just the same as the system of currency we use in this country. A meter is the ten millionth part of an arc of the meridian of Paris drawn from the equator to the north pole as compared with the English inch there are 39

• Lịch sử - Văn hoá
• Lever Escapement
• H R Playtner
• history
• Analysis
• The Lock
• The Fork and Roller Action