Abstract: An hydraulic electrical generator comprises a plurality of water wheels, means connecting said wheels hydraulically in series with at least two said water wheels being driven in the same sense, an individual electrical generator driven individually by each said water wheel, and mechanical means mechanically connecting said at least two water wheels being driven in the same sense together.

Abstract: An automatic leak detection and isolation system for a fluid pipeline (3) comprising a pipeline section (1) through which the fluid flows, the pile line section comprising an inner section (5) through which the fluid flows and a sleeve (9) coaxial with and surrounding the inner section (5) and filled with a hydraulic fluid under pressure. A sensing device (not shown in this figure) is provided for sensing a reduction of the pressure of the hydraulic fluid indicating a leakage from or within the pipeline (3), and closure means (11) are provided, actuable in response to the sensing device sensing a reduction in pressure of the hydraulic fluid to close off one end of the pipeline section (1).

Abstract: An hydraulic electrical generator comprises a plurality of water wheels, means connecting said wheels hydraulically in series with at least two said water wheels being driven in the same sense, an individual electrical generator driven individually by each said water wheel, and mechanical means mechanically connecting said at least two water wheels being driven in the same sense together.

Abstract: An hydroelectric generator for generating an electrical current from moving water comprises two endless belts arranged parallel to each other with adjacent runs running in the same direction. A plurality of paddles are mounted on one of the belts and arranged to engage the other belt over substantially the run of the belts where the belts are running adjacently and means are provided for directing the moving water between the two belts An electrical generator is driven by one or both belts.