Geometrical instruments – Straight-line light ray type – Aerial bomb sight
Patent
1987-01-05
1988-06-14
Stearns, Richard R.
Geometrical instruments
Straight-line light ray type
Aerial bomb sight
279 2R, F41G 154
Patent
active
047502690
ABSTRACT:
A device for sighting-in firearms is disclosed. The device comprises a telescope connected to a mandrel. The mandrel is sized to fit within a variety of calibers of gun bores. The mandrel has a tapered sleeve with a conical shape which centers the outside end of the sleeve in the outside end of the firearm bore. The inside end of the sleeve has a circumferentially expandable structure which allows the sleeve to be secured in the center of the bore when flared by the head of a slideable mandrel core. The telescope is connected to the mandrel with an optical arrangement through which the line of sight of the telescope is observable. The mandrel is constructed so that when the device is inserted in the bore of a firearm, the line of sight of the telescope is centered with and parallel to the axis of the mandrel, which is also the axis of the firearm bore.
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Townsend Ellsworth D.
Townsend Gerald L.
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