The word "fuzes" is not correct and usable in written English.
To use the correct word, you would need to use the noun "fuses." For example, "The electrician replaced the bad fuses in the circuit to prevent a power surge."
Impact fuzes, historically the most common type, are set in the bomb's nose and detonate upon impact, setting off the main charge.
Most bomb fuzes are armed at the moment of the bomb's release from the aircraft, or just before, so that fuzed bombs cannot explode while being loaded or while being transported to their target.
The typical conventional bomb is a streamlined cylinder that consists of five major parts: an outer casing, the inner explosive material, devices such as fins to stabilize the bomb in flight, one or more fuzes to ignite the bomb's main charge, and a mechanism for arming the fuze or preparing it to explode.
In 1850, round solid shot and black powder were standard ammunition for guns, while howitzers fired hollow powder-filled shells ignited by wooden fuzes filled with slow-burning powder.
By 1939 clockwork fuzes of various patterns, some using spring drive and some centrifugal drive, were in general use.
Several types of fuzes are used in bombs.
Another type, the proximity fuze, senses when a target is close enough to be destroyed by the bomb's explosion.
The other device was a type of proximity fuze using a photoelectric cell and thermionic amplifier.
These were artillery projectiles carrying a number of subprojectiles antipersonnel bombs or mines or antitank mines that could be fired from a gun and would be opened, by a time fuze, over the target area to distribute the submunitions.
The proximity fuze was developed by joint British American research and was adopted first for air defense and later for ground bombardment.
After 1945 the proximity fuze was improved by the transistor and the integrated circuit.
