HANDBOOK OF ENEMY AMMUNITION |
PAMPHLET No. 11 |
GERMAN MINES, GRENADES, GUN AMMUNITION AND MORTAR AMMUNITION |
GERMAN FUZE BASE PERCUSSION NO. 5130 |
(Bd.Z. 5130) |
(Fig. 13) |
The fuze is used in the 3.7 cm Pak Stielgranate 41 hollow charge, muzzle stick bomb and is of the igniferous type with a graze action. The designation of the fuze "Bd.Z. 5130" is stamped in the base. The weight of the fuze is 4 oz. 12 dr. |
The body of the fuze is cylindrical with screwthreaded portion of reduced diameter at the head for insertion in the bomb. A large recess, formed from the head, contains the graze pellet and is closed at the top by the detonator holder. A smaller recess near the peri-phery is formed from the base and contains a detent supported by a spiral spring. This recess is closed at the base by a disc secured by the turned over metal of the body. A channel, with a downward incline towards the side, is drilled from the exterior of the body, through the recess containing the detent and into the recess containing the graze pellet. A ball which engages a shoulder on the graze pellet is held in this channel, bet-ween the two recesses, by the detent. Two key flats are formed near the base end of the body. |
The graze pellet consists of a solid cylindrical pellet fitted with a needle at the head. An inclined shoulder, with which the ball engages, is formed below the head. A helical spring is held between the head of the pellet and the base of the detonator holder, the smaller end of the spring fitting around the needle. |
The detonator holder consists of a flanged cup with a flash hole in its base and contains an igniferous detonator stamped with the number "26". The detonator is retained by the mouth of the cup being turned in to overlap a washer. The holder is supported at its flange by a step formed in the top of the recess and is secured by turned in metal of the body. |
The detent is a solid cylindrical pellet with a concave head and a short stem at the base around which the upper end of spiral supporting spring is positioned. |
Action |
During transport the graze pellet is held away from the detonator by the ball, which is held in contact with the shoulder on the pellet by the detent. |
On acceleration the detent, overcoming the spring, sets back and thus releases the ball, which moves down the inclined channel and leaves the graze pellet held off the detona-tor only by the helical creep spring. The concave head of the detent is apparently desig-ned to receive the ball when the detent rises again, and so to push the ball up to of the recess. |
On graze the pellet moves forward, compressing the creep spring and the needle pierces the detonator. |
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