Geometrical instruments – Straight-line light ray type – Alignment device
Patent
1983-04-14
1984-06-05
Little, Willis
Geometrical instruments
Straight-line light ray type
Alignment device
33263, 33180R, 33174R, G01C 1500
Patent
active
044519893
ABSTRACT:
A boat keel tool which is designed to check the alignment of a keel with the center line of a boat and simultaneously measure and check the cross sectional surface of a boat keel from the lead edge of the keel to the trailing edge of the keel.
REFERENCES:
patent: 2364064 (1944-12-01), Francesco
patent: 2737722 (1956-03-01), Keim
patent: 2814125 (1957-11-01), Hartwig
patent: 3389911 (1968-06-01), Castiglione, Jr.
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