Adjustable gun butt
First Claim
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1. An adjustable gun butt assembly comprising:
- first and second face abutting plates having respective front and rear faces, said first plate adaptable to be fixed via said front face to a rear face of a gun stock,a slot in said first face of said first plate adapted to receive and slidably retain the head of a shoulder bolt therein,a circular recess within said front face of said second plate,a rotatable cam disk of a diameter slightly smaller than said circular recess and positioned therein for rotation about coincident axes of the cam disk and circular recess,a first tapped hole within the center of said rotatable cam disk,a second tapped hole within said rotatable cam disk eccentric to said first tapped hole,a hole extending through said second plate coaxial with said circular recess,a resilient shoulder pad having a front face affixed to said rear face of said second plate, and having a hole passing from a rear face of said pad to said pad front face, therethrough parallel to and positionable in line with said hole extending through said second plate, andan adjusting set screw having a head and a threaded shank with said threaded shank sized to and threaded into said first tapped hole in said rotatable cam disk,said shoulder bolt having a threaded shank of predetermined length, and being threaded into said eccentric second tapped hole of said rotatable cam disk such that said shoulder bolt slides freely within said slot of said first plate when said set screw is loosened, andwherein the thickness of said rotatable cam disk is less than the depth of said circular recess receiving the same whereby, with said set screw threaded shank backed out of said first tapped hole, said second plate and said shoulder pad are free to move relative to said first plate and gun stock orthogonally by rotation of said shoulder bolt eccentrically about the axis of said rotatable cam disk as the disk rotates within said circular recess of said second plate and by movement said shoulder bolt independently over the length of said elongated slot, andwherein upon tightening down said set screw, said rotatable cam disk is pulled deeper into said circular recess, causing the shoulder bolt head to drive said first plate into frictional engagement with said second plate to lock said plates together.
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Abstract
An adjustable gun butt assembly includes two plates, one of which is attached to the gun butt and the other which is attached to a resilient shoulder pad. The two plates move relative to one another by way of an eccentric cam disposed in one of the plates. The plates are held in frictional contact to one another by a single set screw accessible through an aperture in the resilient shoulder pad. The shoulder pad may be adjusted orthogonally by way of the cam and additional vertical movement is allowed by way of an extended slot. Sand paper may be fixed to one of the plates to provide a frictional grip between the two plates when the set screw is tightened.
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Citations
4 Claims
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1. An adjustable gun butt assembly comprising:
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first and second face abutting plates having respective front and rear faces, said first plate adaptable to be fixed via said front face to a rear face of a gun stock, a slot in said first face of said first plate adapted to receive and slidably retain the head of a shoulder bolt therein, a circular recess within said front face of said second plate, a rotatable cam disk of a diameter slightly smaller than said circular recess and positioned therein for rotation about coincident axes of the cam disk and circular recess, a first tapped hole within the center of said rotatable cam disk, a second tapped hole within said rotatable cam disk eccentric to said first tapped hole, a hole extending through said second plate coaxial with said circular recess, a resilient shoulder pad having a front face affixed to said rear face of said second plate, and having a hole passing from a rear face of said pad to said pad front face, therethrough parallel to and positionable in line with said hole extending through said second plate, and an adjusting set screw having a head and a threaded shank with said threaded shank sized to and threaded into said first tapped hole in said rotatable cam disk, said shoulder bolt having a threaded shank of predetermined length, and being threaded into said eccentric second tapped hole of said rotatable cam disk such that said shoulder bolt slides freely within said slot of said first plate when said set screw is loosened, and wherein the thickness of said rotatable cam disk is less than the depth of said circular recess receiving the same whereby, with said set screw threaded shank backed out of said first tapped hole, said second plate and said shoulder pad are free to move relative to said first plate and gun stock orthogonally by rotation of said shoulder bolt eccentrically about the axis of said rotatable cam disk as the disk rotates within said circular recess of said second plate and by movement said shoulder bolt independently over the length of said elongated slot, and wherein upon tightening down said set screw, said rotatable cam disk is pulled deeper into said circular recess, causing the shoulder bolt head to drive said first plate into frictional engagement with said second plate to lock said plates together. - View Dependent Claims (2, 3, 4)
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Specification