File:US952706-0.png

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Description
English: Internal combustion engine
Deutsch: Doppelkolbenmotor
Date
Source US Patent US952706A, http://www.google.com/patents/US952706
Author Ralph Lucas (1882-1934)
  1. the two cylinders
  2. combustion chamber
  3. crank chamber
  4. pistons
  5. rods
  6. crank pins
  7. disk
  8. crank shafts
  9. thooted wheels
  10. counter balance weights
  11. pipe
  12. needle valve / fuel valve
  13. needle valve
  14. spring
  15. port
  16. exhaust port[1]
  17. counter balance weights
  18. sparking plug
  19. throttle valve
  20. (silencing) chamber
  21. hole

30. lubricating tubes
31. oil traps
32. draw of cocks

  1. ↑ There is only one exhaust port for the two cylinders
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}}.

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current16:54, 13 January 2015Thumbnail for version as of 16:54, 13 January 20152,320 × 3,408 (88 KB)MichaelFrey (talk | contribs){{Information |Description ={{en|1=Internal combustion engine}} {{de|1=Doppelkolbenmotor}} |Source =US Patent US952706A, http://www.google.com/patents/US952706 |Author =Ralph Lucas (1882-1934) |Date =28. J...

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