File:PuppetValve.png

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PuppetValve.png ‎(293 × 501 pixels, file size: 57 KB, MIME type: image/png)

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Summary

Description
English: A balanced (2-disc) poppet valve from 1886, called a puppet valve by the inventor.
  • A - high pressure steam
  • B - inlet to cylinder
  • C - valve discs
  • D - valve stem
  • E - valve guide and adjusting nut for spring
  • F - spring to ensure solid seal of larger disc
Date
Source U.S. Patent n° 339,809 Figure 1
Author Charles Franklin Putnam
Permission
(Reusing this file)
Public domain The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d), 37 CFR 1.84(s)

The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}.

Licensing

Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.

File history

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Date/TimeThumbnailDimensionsUserComment
current20:01, 11 March 2009Thumbnail for version as of 20:01, 11 March 2009293 × 501 (57 KB)wikimediacommons>Douglas W. Jones{{Information |Description={{en|1=A balanced (2-disc) poppet valve from 1886, called a puppet valve by the inventor. * A - high pressure steam * B - inlet to cylinder * C - valve discs * D - valve stem * E - valve guide and adjusting nut for spring * F -

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