Image:Walschearts valve gear.jpg

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[edit] Description

The Walschearts valve gear on a Pennsylvania Railroad E6s steam locomotive.

This image is taken from the 1922 Locomotive Cyclopedia of American Practice which is now in the public domain. See Copyright.

	This image is in the public domain in the United States. In most cases, this means that it was published in the United States prior to January 1, 1923 or that its first publication anywhere in the world was prior to January 1, 1909 or that its copyright expired in the United States.
	This image might not be in the public domain outside of the United States (this especially applies in Canada, China except Macao, Germany or 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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