File:Antikythera-ek-model-back.ogv
Antikythera-ek-model-back.ogv (Ogg Theora video file, length 13 s, 640 × 480 pixels, 4.78 Mbps, file size: 7.42 MB)
Captions
Captions
Summary
[edit]DescriptionAntikythera-ek-model-back.ogv |
English: A simple model of the working of the internal gears of the "epicyclic platform" of the Antikythera mechanism.
At the top is visible the k2 gear and at the bottom the e6 gear. Under the k2 gear is the k1 gear and under the e6 is the e5 gear. This all rests inside the e3/e4 gear set. When rotating the e2 (other side of the model) gear the motion is transferred by the use of a hollow pin to the e5 gear which rotates the k1 gear. The k1 gear and the k2 gear are coaxial (offset by 1.1 mm) so by the use of a pin on k1 in a slot in k2 the motion can be transferred to k2. By consequence of the offset the motion is faster when the pin is nearer to the centre of k2 and slower when nearer to the edge. The motion is passed to the e6 gear and then through the whole system again which eventually makes the moon indicator rotate. The irregular motion caused by the offset and moving pin-in-slot mimics the irregular motion of the moon as seen from earth. |
Date | |
Source | Own work |
Author | Lead holder |
Licensing
[edit]![w:en:Creative Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/CC_some_rights_reserved.svg/90px-CC_some_rights_reserved.svg.png)
![attribution](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Cc-by_new_white.svg/24px-Cc-by_new_white.svg.png)
![share alike](https://upload.wikimedia.org/wikipedia/commons/thumb/d/df/Cc-sa_white.svg/24px-Cc-sa_white.svg.png)
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 16:18, 10 August 2012 | 13 s, 640 × 480 (7.42 MB) | Lead holder (talk | contribs) |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
Transcode status
Update transcode statusMetadata
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.
Software used | Xiph.Org libtheora 1.1 20090822 (Thusnelda) |
---|