Section through a Martini-Henry lock.

Scanned from "Discoveries & Inventions of the Nineteenth Century" R.Routledge, 13th Edition, 1900.

• A - bolt holding lock and breech to wooden stock
• B - block closing the breech
• C - pin pivoting the block B
• D - back of the case
• E - the lever
• F - pin working on the tumbler G
• G - tumbler working the block B and firing mechanism K
• H - a notch to hold the tumbler G in position
• I - the depression along the top of the block B
• J - the firing chamber
• K - the spring and metal point of the firing mechanism
• L - the rest-piece, holding the firing mechanism in tension until released by the trigger
• M - pin holdinging the cartridge extractor arms N
• N - the cartridge extractor arms
• O - arm working the arms N through the lever E

Firts uploaded to the English wiki under the same name by

	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.
	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.