File:Chain drive, Su Song's book of 1092.jpg

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

Original file (457 × 876 pixels, file size: 159 KB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents
Description The oldest known illustration of an endless power-transmitting chain drive. This was illustrated in 1092, during the Song Dynasty, by the Chinese engineer Su Song in his book Xinyi Xiangfayao. It was called the "celestial ladder", and was used for coupling the main driving shaft of his clock tower to the armillary sphere gear box (which was mounted at the top of the tower in Kaifeng).
Date AD
Source Joseph Needham's Science and Civilization in China: Volume 4, Physics and Physical Technology, Part 2, Mechanical Engineering (1986, Taipei: Caves Books Ltd.)
Author Su Song 蘇頌
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 100 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.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

File history

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

Date/TimeThumbnailDimensionsUserComment
current09:32, 8 August 2008Thumbnail for version as of 09:32, 8 August 2008457 × 876 (159 KB)PericlesofAthens (talk | contribs){{Information |Description=The oldest known illustration of an endless power-transmitting chain drive. This was illustrated in 1092, during the Song Dynasty, by the Chinese engineer Su Song in his book ''Xinyi Xiangfayao''. It was called the "celestial la

You cannot overwrite this file.

The following page uses this file:

File usage on other wikis

The following other wikis use this file:

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Chain_drive,_Su_Song%27s_book_of_1092.jpg&oldid=853805354"