Registers – Calculators – Single axis
Patent
1988-03-03
1989-08-08
Fuller, B. R.
Registers
Calculators
Single axis
235 61NV, 235 88N, G06C 300
Patent
active
048555770
ABSTRACT:
A navigational calculator (10) for establishing the ratios of time, or distance, to be spent on port or starboard tacks, respectively, during the maneuvering of a yacht to a windward destination. A plurality of disk members are carried on a central support (11). The first disk member (14) has a true wind indicator (30) imprinted thereon. The second disk member (15) has a compass rose (34) imprinted thereon. The third disk member (16) has a course indicator (35) and two sets (38 and 39) of tack ratio indicia imprinted thereon. The fourth and fifth disk members (18 and 19) have starboard and port heading indicators (46 and 55, respectively) imprinted thereon. The sixth disk member (20) has included tacking angle indicia imprinted thereon and a tack ratio indicator (61) alignable with one set (38) tack ratio indicia. The seventh disk member (21) has included tacking angle indicia imprinted thereon and a tack ratio indicator (66) alignable with the other set ( 39) of tack ratio indicia. An eighth disk member (79) may be rotatably supported beneath the first disk member (14). By making the eighth disk member (79) of lesser diameter than the first disk member (14), and by providing similar logarithmic scales (81 and 84, respectively) on each, the calculator (10) can incorporate a circular slide rule (85).
REFERENCES:
patent: 2433984 (1948-01-01), DeVries
patent: 3803389 (1974-04-01), Yelverton
patent: 4149068 (1979-04-01), Simon
patent: 4652728 (1987-03-01), Galiana
LandOfFree
Navigational and yacht racing calculator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Navigational and yacht racing calculator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Navigational and yacht racing calculator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-907653