A percussion cap which can be clipped to the rail and detonated by the wheels of a locomotive passing over it This provides an audible warning, particularly useful in foggy conditions where semaphore signals are employed
A detonator is a small amount of explosive or a piece of electrical or electronic equipment which is used to explode a bomb or other explosive device. a piece of equipment used to make a bomb etc explode
A device containing a small detonating charge that is used for detonating an explosive, including, but not limited to, blasting caps, exploders, electric detonators, and delay electric blasting caps
Not to be confused with a firework igniter, or squib, a detonator is used to initiate high explosives As such, detonators are security attractive items and their possession is controlled in many countries