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US 4,232,449 AGranted
Bore sighting apparatus
OwnerDarrell Linenbergerinventor
Life of this patent
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OwnerDarrell Linenbergerinventor
Estimating the term…
The bore sighting apparatus or alignment device is comprised of a two-part ring hinged together and provided with a clamp for securing the ring on the muzzle of a howitzer. A pair of hinged witness sights are provided on the ring and a pair of arms extend outwardly from opposite sides of the ring. A vertical arm is hinged on the outer end of each arm with a target and leveling vile being disposed at the top of each vertical arm. A turnbuckle-type device is connected between the upper end of each vertical arm and the horizontal arm for adjusting the vertical arm to a true vertical position. The targets are comprised of a cylinder having a pattern in glass on the viewing end with the opposite end having a smaller opening with a translucent lens to allow the entry of light to illuminate the viewing end. The targets may be sealed and filled with nitrogen to eliminate fogging and a fitting is provided on the rear of the target to accept a collimator lighting source for night bore sighting. A parallax shield is also provided to narrow the field of vision through either of the sighting telescopes to make the sight picture more accurate.
A bore sighting apparatus comprising clamping ring means adapted to be clamped adjacent the muzzle end of a tube, a pair of horizontally disposed arms secured to said ring means and extending outwardly therefrom in opposite directions, a pair of witness sight means hingedly secured to said arms adjacent said ring for alignment with witness marks on said tube, a pair of vertically disposed arms pivotally secured to the ends of said horizontally disposed arms respectively and target means mounted on each of said vertically disposed arms for use with the sights adjacent the breach end of said tube.
Dependencies are inferred from the claim text.