Geometrical instruments – Straightedge type – Base attached
Patent
1982-12-10
1984-01-24
Little, Willis
Geometrical instruments
Straightedge type
Base attached
33444, 33448, 33DIG9, 33 1C, B43L 1302, G01C 2120
Patent
active
044267894
ABSTRACT:
A navigation position plotter for determining the navigation coordinates of a point on a navigation chart and plotting the position of a point on the navigation chart. A plate bearing navigation scales divided into increments between two spaced grid lines on the navigation chart is mounted on a frame. A first plotting bar is movably mounted on the frame. A second plotting bar is pivotally mounted on the frame and intersects the first plotting bar. The frame is position over the chart such that the navigation coordinate increment underlying the second plotting bar can be read after the first and second plotting bars have been moved into intersecting relationship over the point to be plotted.
REFERENCES:
patent: 1414002 (1922-04-01), Turner et al.
patent: 2300401 (1942-11-01), Basler et al.
patent: 2403614 (1946-07-01), Ross
patent: 2530428 (1950-11-01), Gray
patent: 2756929 (1956-07-01), McGee
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