G - Physics – 01 – C
Patent
G - Physics
01
C
33/96
G01C 17/20 (2006.01) G01C 17/00 (2006.01) G01C 21/20 (2006.01)
Patent
CA 1042199
ABSTRACT OF THE DISCLOSURE: A magnetic compass for vessel sailing. The compass com- prises a turnable body part having a scale, a turnable main stee- ring index directed to the scale, a compass card box enclosed by the body part and stationary relatively thereto, and a compass card turnably carried by the compass card box and serving as a magnetic needle. The compass card has upon its top surface a scale, two marks located at points consistent with the tacking charac- teristics of the vessel and indicating tacking direction. Those marks are spaced to the extent of substantially ninety degrees, the sector between the marks having a specific color. The compass card has two other equal sectors located on the opposite sides of the first-mentioned sector and has a color contrasting with the color of that first sector, the colors of all three sectors contrasting with the coloring of other areas of the compass card. The three sectors have a total area equivalent substantially to an area constituted by 180 degrees.
207824
Jarvenpaa Kauko
Raitmaa Raimo
LandOfFree
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