Method and apparatus for mounting telescopic sights on firearms

Abstract

A method and apparatus for attaching a telescopic scope to a variety of rifles, without requiring the rifle to be modified by drilling or the need to purchase multiple scope mounts, comprised of front and rear mounting assemblies having a mounting plate and a corresponding scope attachment ring. The bases comprise a planar mounting surface embodying a radial recess down the center along with at least one pair of mounting holes and at least one pair of mounting slots for attachment to rifles having different screw patterns and mounting surfaces. The mounting rings are received and attached within longitudinal channels along the mounting bases and the scope subsequently clamped in place by the upper and lower attachment rings, providing for the removal and subsequent attachment of the scope and attachment rings without loosing the scope's previously zeroed calibration.

1 . In combination with a telescopic sight adapted to be removably mounted upon each of a plurality of rifle style firearms, the telescopic sight have a pair of mounting assemblies, each of which comprises an upper ring-shaped sight engagement portion and a pair of downwardly projecting spaced apart mounting arms having inwardly projecting mounting portions thereon;
 each of the firearms having a receiver portion provided with an upwardly facing sight mounting surface provided with two pair of longitudinally spaced apart internally tapped upwardly facing bores, the tapped bores of each pair thereof on each of the firearm receivers being spaced a different longitudinal distance apart from the pairs of bores on the other of the firearm receivers, the improvement comprising:
 a universal telescopic sight mounting system, comprising a pair of longitudinally spaced apart mounting plates associated one with each of the sight mounting assemblies of the telescopic sight; 
 each of said mounting plates being provided with at least one pair of vertically disposed through-bores, longitudinally spaced from at least one pair of slotted through bores, the longitudinal spacing between each pair of through-bores being proximal to the longitudinal spacing between the pairs of tapped bores of one of the firearm receivers; 
 a first fastening means comprising two pairs of threaded fasteners, one of said pairs being associated with one of said adapter plates and the other said pairs being associated with the other of said adapter plates, 
   whereby said adapter plates are adapted to be surmounted on said mounting surface of any of the firearms with one of the at least one pair of bores in each of the adapter plates being aligned with the a corresponding first spaced pair of tapped bores in the associated firearm receiver, and be secured to the receiver by threaded fasteners, and one of the at least one pair of slotted through bores in each of the adapter plates being aligned with the a corresponding second spaced pair of tapped bores in the associated firearm receiver, and be secured to the receiver by said threaded fasteners,   each of said adapter plates removably receiving the inwardly projecting mounting portions of one of said sight mounting assemblies, and second fastening means extending laterally through said mounting portions and said adapter plate for fixedly securing said assembles and hence the telescopic sight to the associated of said mounting plates, wherein when said telescopic sight in combination with said upper ring-shaped sight engagement portion and said downwardly projecting spaced apart mounting arms is removed from said adapter plates and subsequently replaced, the calibration of said telescopic sight is unchanged from prior attachment.   
   
   
       2 . In combination with a telescopic sight adapted to be removably mounted upon each of a plurality of rifle style firearms, the telescopic sight have a pair of mounting assemblies, each of which comprises an upper ring-shaped sight engagement portion and a pair of downwardly projecting spaced apart mounting arms having inwardly projecting mounting portions thereon;
 each of the firearms having a receiver portion provided with an upwardly facing sight mounting surface provided with two pair of longitudinally spaced apart internally tapped upwardly facing bores, the tapped bores of each pair thereof on each of the firearm receivers being spaced a different longitudinal distance apart from the pairs of bores on the other of the firearm receivers, the improvement comprising,
 a universal telescopic sight mounting system, comprising a pair of longitudinally spaced apart mounting plates associated one with each of the sight mounting assemblies of the telescopic sight; 
 each of said mounting plates being provided with at least one pair of vertically disposed through-bores, longitudinally spaced from at least one pair of slotted through bores, the longitudinal spacing between each pair of through-bores being proximal to the longitudinal spacing between the pairs of tapped bores of one of the firearm receivers; 
 a first fastening means comprising two pairs of threaded fasteners, one of said pairs being associated with one of said adapter plates and the other said pairs being associated with the other of said adapter plates, 
   whereby said adapter plates are adapted to be surmounted on said mounting surface of any of the firearms with one of the at least one pair of bores in each of the adapter plates being aligned with the a corresponding first spaced pair of tapped bores in the associated firearm receiver, and be secured to the receiver by threaded fasteners, and one of the at least one pair of slotted through bores in each of the adapter plates being aligned with the a corresponding second spaced pair of tapped bores in the associated firearm receiver, and be secured to the receiver by said threaded fasteners   each of said adapter plates being formed with a pair of longitudinally extending grooves along the longitudinal sides thereof, said grooves removably receiving the inwardly projecting mounting portions of one of said sight mounting assemblies, and second fastening means extending laterally through said mounting portions and said adapter plate for fixedly securing said assembles and hence the telescopic sight to the associated of said mounting plates, wherein when said telescopic sight in combination with said upper ring-shaped sight engagement portion and said downwardly projecting spaced apart mounting arms is removed from said adapter plates and subsequently replaced, the calibration of said telescopic sight is unchanged from prior attachment.   
   
   
       3 . The invention as set forth in  claim 2  wherein each of said adapter plates is formed with two pairs of spaced apart bores which are arranged so as to provide at least four differently spaced apart bore sets. 
   
   
       4 . In combination with a telescopic sight adapted to be removably mounted upon each of a plurality of rifle style firearms, the telescopic sight have a pair of mounting assemblies, each of which comprises an upper ring-shaped sight engagement portion and a pair of downwardly projecting spaced apart mounting arms having inwardly projecting mounting portions thereon;
 each of the firearms having a receiver portion provided with an upwardly facing sight mounting surface provided with two pair of longitudinally spaced apart internally tapped upwardly facing bores, the tapped bores of each pair thereof on each of the firearm receivers being spaced a different longitudinal distance apart from the pairs of bores on the other of the firearm receivers, the improvement comprising,
 a universal telescopic sight mounting system, comprising a pair of longitudinally spaced apart mounting plates associated one with each of the sight mounting assemblies of the telescopic sight; 
 each of said mounting plates being provided with three pairs of longitudinally spaced vertically disposed through-bores, the longitudinal spacing between each pair of through-bores being equal to the longitudinal spacing between the pairs of tapped bores of one of the firearm receivers; 
 a first fastening means comprising two pairs of threaded fasteners, one of said pairs being associated with one of said adapter plates and the other said pairs being associated with the other of said adapter plates, 
   whereby said adapter plates are adapted to be surmounted on said mounting surface of any of the firearms with one of the pairs of bores in each of the adapter plates being aligned with the corresponding spaced pair of tapped bores in the associated firearm receiver, and be secured to the receiver by one of the pairs of threaded fasteners,   each of said adapter plates being formed with a pair of longitudinally extending grooves along the longitudinal sides thereof, said grooves removably receiving the inwardly projecting mounting portions of one of said sight mounting assemblies, and second fastening means extending laterally through said mounting portions and said adapter plate for fixedly securing said assembles and hence the telescopic sight to the associated of said mounting plates,   wherein at least one of the firearms has a cylindrical upper sight mounting surface on its receiver portion and at least one of the firearms has a relatively flat upper sight mounting surface on its receiver portion, and wherein each of the adapter plates is formed with a shallow concave surface on the underside thereof which is adapted to nestingly receive the sight mounting surface of each of said receivers, wherein when said telescopic sight in combination with said upper ring-shaped sight engagement portion and said downwardly projecting spaced apart mounting arms is removed from said adapter plates and subsequently replaced, the calibration of said telescopic sight is unchanged from prior attachment.   
   
   
       5 . The invention as set forth in  claim 1 , wherein at least one of the firearms has a cylindrical upper sight mounting surface on its receiver portion and at least one of the firearms has a relatively flat upper sight mounting surface on its receiver portion, and wherein each of the adapter plates is configured with a shallow concave surface on the underside thereof, formed between two adjacent flat surfaces, said shallow concave surface adapted to nestingly receive the sight mounting surface of each of said firearms having a cylindrical upper sight mounting surface on their receiver portion; said flat surfaces of said adapter plates formed to receive the sight mounting surface of each of said firearms having said relatively flat upper sight mounting surface on their receiver portion. 
   
   
       6 . The invention as set forth in  claim 2 , wherein at least one of the firearms has a cylindrical upper sight mounting surface on its receiver portion and at least one of the firearms has a relatively flat upper sight mounting surface on its receiver portion, and wherein each of the adapter plates is configured with a shallow concave surface on the underside thereof, formed between two adjacent flat surfaces, said shallow concave surface adapted to nestingly receive the sight mounting surface of each of said firearms having a cylindrical upper sight mounting surface on their receiver portion; said flat surfaces of said adapter plates formed to receive the sight mounting surface of each of said firearms having said relatively flat upper sight mounting surface on their receiver portion. 
   
   
       7 . The invention as set forth in  claim 5 , wherein each of said adapter plates is configured with two flat surfaces on either side of said shallow concave surface; said flat surfaces of said adapter plates formed to receive the sight mounting surface of each of said at least one firearm having said relatively flat upper sight mounting surface on their receiver portion. 
   
   
       8 . The invention as set forth in  claim 6 , wherein at least one of the firearms has a cylindrical upper sight mounting surface on its receiver portion and at least one of the firearms has a relatively flat upper sight mounting surface on its receiver portion, and wherein each of the adapter plates is configured with a shallow concave surface on the underside thereof, formed between two adjacent flat surfaces, said shallow concave surface adapted to nestingly receive the sight mounting surface of each of said firearms having a cylindrical upper sight mounting surface on their receiver portion; said flat surfaces of said adapter plates formed to receive the sight mounting surface of each of said firearms having said relatively flat upper sight mounting surface on their receiver portion. 
   
   
       9 . The invention as set forth in  claim 8 , wherein each of said adapter plates is configured with two flat surfaces on either side of said shallow concave surface; said flat surfaces of said adapter plates formed to receive the sight mounting surface of each of said at least one firearm having said relatively flat upper sight mounting surface on their receiver portion.