Fuzes

In military munitions, a fuze (sometimes spelled fuse) is the part of the device that initiates its function. In some applications, such as torpedoes, a fuze may be identified by function as the exploder. The relative complexity of even the earliest fuze designs can be seen in cutaway diagrams.

fuze that detonates an explosive device

fuze used with artillery munitions

device that detonates bomb on contact with hard surface