File:Tidens naturlære fig26.png

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file(1,080 × 568 pixels, file size: 128 KB, MIME type: image/png)

Captions

Captions

Add a one-line explanation of what this file represents

Summary[edit]

Description
Dansk: "Tidens naturlære" 1903 af Poul la Cour, Fig. 26. Ankergang.
Bogen findes digitalt på s:da:Tidens Naturlære
English: A drawing of an English lever escapement from "Tidens naturlære" (Nature of time) 1903 by Poul la Cour, Ill. 26. An escapement, part of every mechanical watch, is a mechanical linkage which gives the balance wheel a push each swing, keeping it oscillating back and forth, and at each swing of the balance wheel releases the gear train to move forward a fixed amount, thus moving the hands of the watch forward at a steady rate. The English lever was used in quality watches up until the mid 1800s and is the forerunner of the modern Swiss lever escapement, which is used in almost every mechanical watch today.
The book is digitized at s:da:Tidens Naturlære
Date
Source From the book "Tidens naturlære" 1903 by Poul la Cour
Author Morten Bisgaard
Permission
(Reusing this file)
PD-Old

Licensing[edit]

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).

File history

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

Date/TimeThumbnailDimensionsUserComment
current16:30, 7 August 2006Thumbnail for version as of 16:30, 7 August 20061,080 × 568 (128 KB)Bisgaard (talk | contribs){{Information |Description="Tidens naturlære" 1903 af Poul la Cour, Fig. 26. Ankergang.<br> Bogen findes digitalt på s:da:Tidens Naturlære<br><br> "Tidens naturlære" (Nature of time) 1903 by Poul la Cour, Ill. 26.<br> The book is digitized at [[s:

The following page uses this file:

File usage on other wikis

The following other wikis use this file: