The time fuse assembled, ready to be screwed on to the shell proper.
The top of the fuse which contains the spring and fulminate of mercury cap. The latter explodes from inertia on leaving the gun.
First ring, with groove filled with powder which burns until it comes to hole in (4). It is ignited by the explosion of the cap in (2).
Second ring, also filled with powder, which is ignited from (3) and which burns as far as the unit indicated on ring. This ring is set for the second at which it is desired that the shell shall explode over the enemy's lines.
Base of time fuse. Upper part contains trigger and lower part tube through which the flame passes which explodes the shell itself.
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.
Captions
Add a one-line explanation of what this file represents