| 摘要 |
An electrically-fired gun, of the type having a breechblock slidable in a transverse passage across its breech, has a retractor mechanism mounted within the breechblock for retracting the firing pin electrode tip behind the face of the breechblock as it opens and closes. A retractor lever connected to the firing pin is controlled by positioning means comprising spring means biasing the lever in one direction, and a plunger cam cooperable with a wall of the transverse passage to displace the lever in an opposite direction. The positioning means serve to retract the firing pin when the breechblock is opened for reloading, and to extend it on reclosing.
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