Mount for a sighting device on a firearm

Abstract

A mount is used to mount an aiming device of the type for projecting a virtual image onto a target on a firearm such as a shotgun or a rifle. The firearm includes a back-sight or a rib and a front-sight at the free end of the barrel. The mount fixes the aiming device at the location provided for the front-sight.

There is claimed:  
     
         1 . A mount for mounting an aiming device of the type for projecting a virtual image onto a target on a firearm such as a shotgun or a rifle which includes a back-sight or a rib and a front-sight at the free end of the barrel, which mount includes means for fixing said aiming device at the location provided for said front-sight.  
     
     
         2 . The mount claimed in  claim 1  further including a plate provided with means for fixing said aiming device to it and with means for fixing it to the location provided for said front-sight.  
     
     
         3 . The mount claimed in  claim 1  further including a block incorporating a dovetail groove and wherein said front-sight is carried by a support having a key adapted to be inserted into said groove and said aiming device is fixed to a plate provided with a key matching said groove.  
     
     
         4 . The mount claimed in  claim 2  further including means for selectively immobilizing said support of said front-sight or said plate supporting said aiming device in said groove.  
     
     
         5 . The mount claimed in  claim 4  wherein said block incorporates holes for a screw and said keys of said support and said plate incorporate a notch adapted to coincide with said holes and to cooperate with said screw.  
     
     
         6 . The mount claimed in  claim 5  wherein said screw is screwed into a nut and said nut and said screw have respective knurled heads.  
     
     
         7 . The mount claimed in  claim 1 , for a firearm in the form of a double-barrel rifle with two side-by-side barrels joined by a rib at the free end of which is a support for said front-sight, wherein said plate is shaped to espouse the shape of said support and is extended by two flanges espousing the shape of said barrels and provided with tapped holes adapted to receive screws for fixing said aiming device, and said flanges are offset in the heightwise direction so that the axis of said virtual image coincides with the back-sight/front-sight aiming axis.  
     
     
         8 . The mount claimed in  claim 7  wherein said support includes a tapped hole and said plate includes a hole for a fixing screw adapted to be screwed into said tapped hole.  
     
     
         9 . The mount claimed in  claim 1  further including a bush adapted to be fixed to the free end of said barrel, a sleeve mounted to pivot on said bush and carrying said front-sight and said aiming device angularly offset from each other, and means for selectively locking said sleeve in either of two angular positions, in a first of which angular positions said aiming device is disposed so that said projected image is aligned with said back-sight or said rib and in the second of which angular positions said front-sight is aligned with said back-sight or said rib.  
     
     
         10 . The mount claimed in  claim 9  wherein said bush has at one end a flange constituting an abutment for one end of said sleeve and said sleeve is retained at its other end by said ring fixed to said barrel.  
     
     
         11 . The mount claimed in  claim 9  wherein said bush incorporates two blind holes offset by 180° from each other and connected by a groove and said sleeve incorporates a radial hole accommodating a ball spring-loaded by a spring so that it cooperates with said groove and selectively with said blind holes.