GB190300835A - Improvements in or relating to Ships and Vessels - Google Patents

Abstract

835. Manker, C. A. Jan. 13. Screw propellers; propelling by vibrating plates; drop-keels; rudders.-Relates to a ship or vessel which is constantly lifted or buoyed up as the vessel travels, and is provided with means to prevent pitching or tossing and with means to alter in pitch the propeller blades. The ship shown in Fig. 1 has a keel 2, Fig. 7, which is adjustable vertically for elevating or lowering the propellers A and working parts carried by the keel. The hoisting-screws 4 are rotated by suitable gearing. The two propellers A are partially operated in the chamber 9, Fig. 4, of the keel, and are rotated in opposite directions. The gate 13, Fig. 4, closes the duct B when the vessel is reversed. The propeller power shaft 14, Fig. 10, is driven by suitable means, and its motion is communicated by bevel gear to the vertical shaft 17, from which the propellers are driven. The hub 24 of each propeller shaft 25, Figs. 8 and 9, is composed of two sections bolted together, and has an interior chamber 26 and radial socket arms 27 in which the shanks of the propeller blades are loosely fitted. Crank arms 29, integral with the shanks of the blades, terminate in balls 29. The sleeve 32 can slide on the auxiliary shaft 30, and is reciprocated by the rotation of the vertical shaft 37 when it is desired to rock the crank arms 29 and vary the pitch or angles of the blades. Means for rotating the vertical shafts 37 singly or in unison are shown in Fig. 10. The rudder 44 of the vessel is swung from side to side on rotating the cranks 54 by means of the shaft 52, the worm 51, and wheel 50 on the rudderpost 49. The curved plates 55, 69 are oscillated by the swinging of the pendulums 67, 79, or by hand-gear to prevent the tossing or rocking of the vessel. When the keel 2 is raised, the pockets 80 receive the propellers A. Sustaining-members 81 are secured to the underside of the hull 1. These members are inclined downwardly and rearwardly.