Pressure source

Claim 1

A pressure source to develop a stream of liquid under pressure as the consequence of the rise and fall of the surface of a body of water, comprising: pressurizing means comprising an enclosure which bounds a chamber, said enclosure comprising a first and a second portion, at least one of which portions is movable relative to the other as a consequence of a force applied to one of them so as to reduce the volume of the chamber and thereby to place under pressure liquid which is contained therein; a conduit leading from said chamber through which a stream of liquid under pressure can flow for doing work; buoyant weight means floatable in said body of water; force transmission means so disposed and arranged as to apply force from said weight means to said one portion when said weight means is elevated; an open-closed release valve in said conduit which when closed prevents flow of liquid from the chamber through the conduit and will thereby also prevent said weight means from lowering, and which when open permits flow of liquid under pressure from the chamber through the conduit and will thereby permit said weight means to lower; and control means effective selectively to close and to open said release valve, said control means closing the release valve when the water surface is as high or higher than a reference level relative to the weight means itself, and opening the release valve means when lower, said control means comprising a buoyant float and inflexible mounting means, said mounting means being mounted to said weight means, said buoyant float being attached to said mounting means, said mounting means being so mounted to said weight means as movably to mount said buoyant float for movement relative to said weight means, which movement of said buoyant float means is independent of said weight means, but responsive to the elevation of said surface relative to said weight means, and only along a single unique and invariable path relative to said weight means, whereby the location of the buoyant float relative to the weight means, and the control condition of the control means are uniquely a function of the elevation of said surface relative to said weight means, said mounting means is a rigid shaft vertically shiftably mounted to said weight means, said shaft depends downwardly from the bottom of said weight means, and in which said control means controls said valve in such a manner that said buoyant float extends for a sufficient distance beneath the bottom of said weight means when it opens said valve that said surface of water is out of contact of said weight means.