Image:Fusee.png

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[edit] Summary

Description

Woodcut of fusee and mainspring, showing operation. The fusee (cone-shaped pulley) was used in antique clocks and watches to improve accuracy by equalizing the force of the mainspring. The labeled parts are: (A) mainspring arbor, (B) mainspring barrel, (C) chain, (D) fusee axle, (E) attachment of chain to barrel, (e) attachment of chain to fusee, (F) fusee, (G) winding arbor, (W) output gear wheel. Alterations: combined two illustrations from the source, Fig. 14 p.24 and Fig.15 p.25 into one image, and added the captions.
Source

Downloaded from Dionysius Lardner, The Museum of Science and Art, Vol.6, Walton & Maberly, London, 1855, fig.14 & 15, p.24-25 on Google Books
Date

Published 1855
Author

Dionysius Lardner
Permission
(Reusing this image)

Public domain - Author died in 1859

[edit] Licensing

Public domain This image (or other media file) is in the public domain because its copyright has expired.

This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.

Note that a few countries have copyright terms longer than 70 years: Mexico has 100 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. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement that rule of the shorter term.

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File history

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Date/TimeDimensionsUserComment
current22:27, 7 October 2007994×817 (71 KB)Chetvorno ({{Information |Description=Woodcut of clock fusee. |Source=[http://books.google.com/books?id=480EAAAAYAAJ&pg=RA1-PA24|Dionysius Lardner, ''The Museum of Science and Art, Vol.6'', Walton & Maberly, London, 1855, fig.14 & 15, p.24-25] |Date=Published 1855)
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