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Thomas Clark
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Individual
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Publication of GB190102424ApublicationCriticalpatent/GB190102424A/en
2424. Clark, T. Feb. 5. Screw propellers.-To increase the speed for a given motive power, and to lessen vibration and the racing of the screw, the two blades are arranged with opposite pitches as shown. The two blades a, b are, respectively, provided with bosses a<1>, b<1>, which are secured to each other by the bolts c, and to the shaft by one or more keys. The points of the blades are arranged to overlap, as shown in Fig. 3.
GB190102424D1901-02-051901-02-05An Improved Propeller for use on Ships and Boats
ExpiredGB190102424A
(en)
Improved Mechanism Designed to be Employed for the Propulsion of Ships, Submarines and Aerostats, as well as for the Production of Motive Power by Means of a Current of Air or Water.