| 摘要 |
An improved construction for a percussion fuse interposed between a charge-carrying shell body and a shell head disposed forwardly of the shell body is described. An impact body, which carries the percussion cap of the fuse and which is normally maintained in its rearmost position to hold the cap away from a firing pin extending rearwardly from the shell head, is provided with an inwardly and rearwardly extending frustoconical recess in its front surface, such recess terminating at the front surface of the percussion cap. A conventional inertial sphere is normally disposed within the first recess during the acceleration phase of the shell flight, and is movable forwardly in an inertial manner toward the shell head during a subsequent deceleration of the shell. The firing pin in the shell cap is in turn formed from a forward cylindrical portion, which defines a sphere-receiving annular recess with the surrounding wall of the shell head, and a rear conical portion which conforms to the conical angle of the first recess in the impact member to define a sphere-clamping chamber therebetween when the shell is suddenly decelerated during the normal acceleration portion of its flight.
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