English: Patent Drawing for Chain Rammer, U.S. Patent 904,966 (1908). A chain rammer was a device used to load heavy-caliber ordinance into the breech of a cannon.
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}}.
Original upload log
The original description page was here. All following user names refer to en.wikipedia.