Description
The fuze consists of a body, arming vanes, and an electric circuit comprising a dry cell, an igniter bridge, a sensitive mercury switch, and a delay arming switch. The upper part of the fuze body is ogival to complete the streamlining of the bomb. A safety clip, inserted between the vanes and the top of the arming spindle, depresses the vanes against the force of the van spring and prevents the vanes from rotating by meshing two vane stops with two grooves in the top of the fuze ogive.
Attached to the vanes is an arming spindle, which is threaded down through the top of the fuze. Half-way down the arming spindle is located an annular groove, which interrupts the threading of the spindle. The lower end of the spindle is enlarged to prevent its falling completely away from the fuze when rotated by the vanes. Located beneath the spindle is a cone, which rests in an inertia ring. A pin extends from the point of the cone and engages the retaining ball of the spring-loaded delay arming plunger. Below the delay arming plunger is a plastic delay washer with a contact plate located beneath it. The electric circuit leads from the positive pole of the battery through the fuze body to the delay arming plunger, where the circuit is broken until the plunger makes contact with the contact plate. From the contact plate, the circuit leads to the mercury switch, and from the mercury switch through the igniter bridge to the negative pole of the 1.5-volt dry-cell battery. Leading from the igniter bridge to the exploder in the bomb is a series of gunpowder pellets.
The Fuze No. 845 Mk II is like the Mk I except that it has a spring link type safety clip, and the nose of the fuze is shorter.
Functioning
No information about functioning.
See Also
Nothing else to see.
Source(s)
OP 1665, British Explosive Ordnance (1946)
