Ships – Watercraft with means used in providing sailpower – Having specifically defined hull shape
Patent
1993-03-22
1994-12-13
Swinehart, Edwin L.
Ships
Watercraft with means used in providing sailpower
Having specifically defined hull shape
114 93, B63B 3579
Patent
active
053720806
ABSTRACT:
A motorized sail tensioner gives the sailor the ability to change the sail shape while sailing, permitting constant adjustment of the sail with only the touch of a switch, to adjust for wind gusts and lulls. It accomplishes this by using a small DC-battery powered motor, assisted by two methods of gear reduction, using a planetary gear and screw. The motor is activated by a remote RF wireless transmitter, worn on the sailors wrist, and activated by a switch, worn on the sailor's index finger. The sail tension is changed by moving the mast position by the action of moving a nut up and down a screw attached to the motor.
REFERENCES:
patent: 3499344 (1970-03-01), Pickles
patent: 4426806 (1984-01-01), Woodworth
patent: 4722625 (1988-02-01), O'Brien
patent: 5134952 (1992-08-01), Dolittle
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