Jump to content

File:Duplex Escapement.png

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Original file ‎(640 × 726 pixels, file size: 26 KB, MIME type: image/png)

Summary

Description Drawing of duplex escapement, invented by Thomas Tyrer around 1760. Parts: (A) escape wheel, (B) locking tooth, (C) impulse tooth, (D) pallet, (E) ruby roller. The pallet is shown in dotted lines because it is mounted above the escape wheel and ruby roller. The pallet and roller are on the balance wheel arbor, but the balance wheel itself is not shown. Alterations: using a graphics editor I drew in one of the impulse teeth that had apparently been left out of the original drawing, and replaced the original letters identifying parts with colored ones in a different order.
Date
Source Downloaded from Harry Leonard Nelthropp (1873) A Treatise on Watchwork, Past and Present, E.&F.N.Spon, London, Fig.12, p.163 on Google Books
Author Harry Leonard Nelthropp
Permission
(Reusing this file)		 Public domain - author died more than 70 years ago

Licensing

Public domain

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.

You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
 Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current10:08, 16 October 2007Thumbnail for version as of 10:08, 16 October 2007640 × 726 (26 KB)Chetvorno{{Information |Description=Drawing of duplex escapement, invented by Thomas Tyrer around 1760. With a graphics editor I drew in one of the impulse teeth that had apparently been left out of the original drawing, and added the letters. Parts: (A) escape
The following pages on the English Wikipedia use this file (pages on other projects are not listed):

Global file usage

The following other wikis use this file:

Retrieved from "https://wiki.riteme.site/wiki/File:Duplex_Escapement.png"