This flare was communicated to the percussion cap, or fulminate of mercury, at the base of the cartridge.
He saw a spark, heard the bang of the percussion cap, but there was nothing more.
You feel it your duty to unravel the secret of the percussion cap?
The Countess was disappointed because the percussion cap was not exploded.
But a weapon which required a percussion cap for its discharge had nothing to do with Violet Heredith's death.
The spark plug is a simple device which may be compared to the fuse or percussion cap of the cannon.
There was a quick pressure, a snap like the crack of a percussion cap, and all was over.
Chemistry advances, like the isolation of mercury fulminate in 1800, led to the invention of the percussion cap and other primers.
Cyrus Harding could certainly have fabricated a percussion cap.
This piece was altered from flint lock to pill-percussion lock, and later to the percussion cap lock.