Registers – Calculators – Tabular
Patent
1982-06-01
1985-01-01
Fuller, Benjamin R.
Registers
Calculators
Tabular
235 61NV, 235 78N, 33431, G06C 300
Patent
active
044917244
ABSTRACT:
A course and heading computer for use with marine charts which includes a transparent planar baseplate having a semicircular edge at one end joined with rectangular edges at the opposite end, the straightedge parallel to the shorter dimension of the baseplate being equal in length to the diameter of the semicircle, a 360.degree. circular scale imprinted on the baseplate with its center at the center of the semicircle, and a printed scaled grid to assure quick, accurate alignment, on the marine charts, and a transparent disk member rotatably attached at its center to the center of said semicircle, and having a 360.degree. scale imprinted around its periphery, the scale imprinted on the baseplate and the scale printed on the disk member being concentric with one another to form a compass rose, the zero degree point of the base member scale being located half way around the perimeter of the semicircle, and a bar member rotatably attached at its center to the center of the baseplate semicircle, where the bar member overlies the transparent disk, the bar member having an axial line inscribed thereon.
REFERENCES:
patent: 2481846 (1949-09-01), King
patent: 2904885 (1959-09-01), Wood, Sr.
patent: 3018552 (1962-01-01), Adams
patent: 3034713 (1962-05-01), Kuzenko
patent: 3076596 (1963-02-01), Jaderholm
patent: 3131858 (1964-05-01), Warner
patent: 3350007 (1967-10-01), Urben
patent: 4359628 (1982-11-01), Lambert
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