1851 Great Exhibition: Official Catalogue: Class VIII.: Molyneaux Shuldham
172. SHULDHAM, MOLYNEAUX, Melton, Woodbridge - Inventor.
Patent revolving masts, etc. The assumed utility of the invention consists in causing the masts to revolve, by which manual labour in the evolution of "tacking" is avoided.
These masts are adapted to yachts, despatch vessels, and coast cruisers; but more particularly to coasters or vessels voyaging in intricate navigations, or in the Arctic Seas.
Illustrations of a method of ballasting vessels, combined with the revolving rig.
A boat made to show a method of constructing a revolving mast, adapted for small boats, and for two-masted luggers, up to 20 tons, by the aid of a spreader for one, or a pair of shrouds, with an apparatus to show that the plan is also adapted for small pleasure-boats.