File:Going barrel.png

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DescriptionGoing barrel.png	Drawing of a 'going barrel' type mainspring barrel in a watch, sectioned through the axis. The mainspring is shown fully wound, tight around the winding arbor. The wheel attached with screws at top is the ratchet, to prevent the mainspring from unwinding. This was from a keywind pocketwatch; the winding arbor (axle) extended to a squared off section (not shown) accessible through a hole in the back. A key was inserted through the hole, fitted on the shank, and turned to wind the watch. Besides the arbor, this is similar to a mainspring barrel in a modern watch. Alterations: removed caption, sharpened, converted to PNG.
Date	1896
Source	downloaded from Britten, Frederick J (1896) The Watch and Clock Maker's Handbook, Dictionary and Guide, 9th Ed., Spon & Chamberlain, New York, p.236, fig.14 on Google Books
Author	Frederick J. Britten
Permission (Reusing this file)	Public domain - published in the US before 1923
Other versions	Derivative works of this file: Going barrel.svg

Public domain	This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.	United States
	This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	08:21, 7 December 2007		683 × 306 (17 KB)	Chetvorno (talk \| contribs)	{{Information \|Description=Drawing of a 'going barrel' type watch mainspring barrel. The drawing is a section through the axis. Alterations: removed caption, sharpened, converted to PNG. \|Source=downloaded from [http://books.google.com/books?id=5SYJAAAA

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