
The Nose Mechanical Impact Fuze Mk 3 Mod 1 is a water impact fuze designed as an integral part of each bomb in which it is used. It consists of a fuze body, mounted in the nose of the bomb, and a vent-tube assembly running through the HC filler of the bomb. A washer in front of the fuze body serves to retain the firing pin, which is held away from the primer by a creep spring. The primer is mounted over a length of time fuse which extends to a quick match increment in the starting mixture at the rear of the vent tube. The after end of the vent tube is sealed with a blow-out disc.
The Adapter Mk 1 is attached to the protruding fuze body to ensure fuze functioning on either water or land impact. The adapter, which is attached to the protruding body by three set screws, consists of a cup-shaped head mounted on a freely moving plunger. The plunger, which is held in its guide by two stop screws, will transmit any blow on the cup to the tiring pin. A spring-loaded horseshoe collar is mounted beneath the cup to hold the plunger away from the firing pin.
No information about functioning.
No information about hazardous components.
Nothing else to see.
OP 1664, Volume 2 - US Explosive Ordnance (1947)
USNBD - Bombs and Fuzes, Pyrotechnics (1945)