Rapid clamping base for an optic rifle sight

Abstract

A rapid clamping base for an open rifle sights, the base includes a front frame and a rear frame, whose clamping rings retain the sight. The frames can be clamped by a retainer to a clamping rail in a gun. The claws provided in the front frame are provided at different locations relative to the longitudinal direction of the rails so as to be pressed in engagement with the edges of the rail when the optic sight is turned in the horizontal plane from the lateral direction to the central line of the gun. The front frame also includes a support tongue. The rear frame includes claws engaging the clamping rail. The rear frame includes a support tongue extending downwards and bearing against the front edge of the rear clamping rail.

1 . A rapid clamping base for an optic rifle sight, the base consisting of two clamping frames, a front frame ( 1 ) and a rear frame ( 2 ), whose clamping rings ( 3 ,  4 ) retain the optic sight ( 5 ) and which can be locked in engagement with a two-piece clamping rail ( 6 ,  7 ) of a gun, such as a sporting gun, by means of a rapid retainer, characterised in that the claws ( 8 ,  9 ) provided in the front frame ( 1 ) for gripping the clamping rail ( 6 ) are provided at different locations relative to the longitudinal direction of the rail, so that the claws are pressed in engagement with the edges of the rail when the sight ( 5 ) is turned in the horizontal plane from the lateral direction ( 10 ) to the central line of the rifle, and that the front frame ( 1 ) additionally comprises a downwardly extending support tongue ( 11 ), which bears against the rear edge of the front clamping rail ( 6 ), and that the rear frame ( 2 ) comprises second claws ( 12 ,  13 ) engaging the clamping rail ( 7 ), one claw ( 12 ) being solidly mounted in the rear frame and the other, i.e. the clamping claw ( 13 ) being movable and in position to be pressed against the edge of the rail, and that the rear frame also has a downwardly extending support tongue ( 14 ), which bears against the front edge of the rear clamping rail ( 7 ), both of the frames thus having three pressing points relative to the clamping rails.  
     
     
         2 . A rapid clamping base as defined in  claim 1 , characterised in that the clamping claw ( 13 ) is spring-loaded so as to bear against the edge of the clamping rail ( 7 ) under the action of the spring force.  
     
     
         3 . A rapid clamping base as defined in  claim 1  or  2 , characterised in that the other claw ( 8 ) of the front frame ( 1 ) is spring-loaded so that the claws ( 8 ,  9 ) engage the edges of the clamping rail ( 6 ) under the spring force when the optic sight is turned ( 10 ) in position.