Noun
a detonator that explodes when struck
Source: WordNetAfter each shot, a user was advised to raise his revolver vertically while cocking back the hammer so as to allow the fragments of the spent percussion cap to fall out safely. Source: Internet
The ammunition was initially a steel cylinder charged with black powder and primed with a percussion cap, because self-contained brass cartridges were not yet fully developed and available. Source: Internet
The primer charge is at the base of the cartridge, either within the rim (a " rimfire " cartridge) or in a small percussion cap embedded in the center of the base (a " centerfire " cartridge). Source: Internet
This early form of cartridge had to be rammed into the muzzleloader's barrel, and either a small charge of gunpowder in the touch hole or an external percussion cap mounted on the touch hole ignited the gunpowder in the cartridge. Source: Internet
To reload a fired case, the pin is removed, allowing the anvil to slide out; a percussion cap is placed in the anvil, it is re-inserted, and the pin serves to lock the anvil in place, as well as to ignite the percussion cap. Source: Internet
When firing the next shot, the user would raise his pistol vertically as he cocked the hammer back so as to let the fragments of the burst percussion cap fall out so as to not jam the mechanism. Source: Internet