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US 5,225,626 AGranted
Azimuth determination method
AssigneeThe United States of America as represented by the Secretary of the Army
InventorBrian K. Bowers
Life of this patent
Estimating the term…
Abstract
A method for measuring the azimuth angles of grenade launcher tubes quickly nd directly, uses an easily fabricated, portable fixture and a commercially available hand-held electronic compass. There is not need for a precise set-up of complex equipment or mathematical computations.
Claims8
A method of determining the azimuth of a grenade launcher tube having a centerline elevated at an elevation angle, comprising:
- extending a straight line marker parallel to the centerline, the marker having an outer end spaced from the tube;
- hanging an elongated plumb bob vertically from the end of the marker;
- sighting along a substantially horizontal line of sight which lies in plane containing the plumb bob and the marker;
- and
- reading a horizontal bearing of the line of sight which corresponds to the azimuth of the tube.
2 more elements
An apparatus for determining the azimuth of a grenade launcher tube having centerline elevated to an elevation angle, comprising:
- a plug for insertion into the launcher tube;
- an extension extending substantially parallel to the centerline and outwardly from the plug;
- a straight line marker on the extension lying parallel to the centerline when the plug is in the tube;
- and
- an elongated plumb bob flexible connected to an outer end of the marker and being elongated for lying in a plane containing a line of sight at a horizontal bearing corresponding to the azimuth, containing the elongated plumb bob and containing the marker.
2 more elements
Dependencies are inferred from the claim text.