Propeller for Boats.
Description:
Patent for improvements in propellers for boats by “having a pair of hinged propeller-blades adapted to swing toward and away from each other, combined with fixed prongs; which are engaged with the propeller blades and hold them from displacement.” (Lines 60-65) Illustration is included.
Date:
May 5, 1891
Creator:
Gillespie, Lewis
Item Type:
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Partner:
UNT Libraries Government Documents Department