Patent ID: 7793578

Claim:
A percussion device for a medium or large calibre weapon, and for support by the breech of such a weapon, said device comprising: a firing pin body housing a firing pin and a spring for driving said firing pin in firing axial translation; a drive cam for displacing said firing pin in the opposite axial translation direction and loading said spring thereby placing said firing pin in an armed position; a sear for immobilizing the firing pin in an armed position, said sear being movable from a safety position wherein the sear immobilizes the firing pin in its armed position, to a firing position wherein the sear can release the firing pin for firing translation; an electromagnetic actuator for displacing the sear thereby releasing the firing pin for firing translation; a spring-loaded tappet for exerting force on the sear in a direction opposite to that of the actuator; an arming lever, one end of which is mounted for rotation about an arming axis spaced from and orthogonal to the axis of firing translation of the firing pin; a cam follower mounted for rotation about the arming axis and connected to the arming lever; the drive cam mounted for rotation about a third axis parallel to the arming axis and spaced therefrom so that the cam follower abuts the drive cam, whereby rotation of the drive cam will cause rotation of the cam follower and the arming lever; a second end of said arming lever contacting a drive finger on the firing pin body for moving the firing pin in axial translation thereby loading the firing pin spring and placing the firing pin in armed position.