The Bormann fuse is named after its inventor, Belgian Army Captain Charles G. Bormann.

This pattern of fuse is in the shape of a thick disk. Measures approximately 1.6” in diameter and 0.5” thick with threaded sides. The top side had time markings in quarter-second intervals up to 5-1/4 seconds.

In operation, the artillerist used a punch to pierce the surface at the desired time. This exposed the imbedded powder train, and when the cannon was fired, the flame from the explosion ignited this powder train.  It would burn back to the zero-mark, where it would travel to a small charge located on the underside of the fuse. This would in turn send a flame to the main powder chamber of the projectile.

This specimen is from an exploded cannon ball but remains in generally good condition with numbers and incremental lines still visible up to the “3”. The fuse was punched and there is some burn-out. Threads also remain in good condition.

A hard to find fuse.    [jet][ph:L]

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