Patent GB-509761-A (GB)
Title: Improvements in or relating to hydraulic power transmitters
IPC: F16D33/14
Filed: 1937-12-20
Abstract: 509,761. Hydraulic power transmitters. KIEP, J. N., and SINCLAIR, H. Dec, 20, 1937, No. 35282. [Class 69 (ii)] A hydraulic power transmitter of the kinetic type comprises a working chamber including driving and driven vaned elements, a rotatable reservoir chamber co-axial with the working chamber, a scoop device in the working chamber adapted to transfer liquid therefrom to the reservoir chamber, and a scoop device in the reservoir chamber adapted to transfer liquid therefrom to the working chamber, these scoop devices being capable of angular displacement eccentrically with respect to the axis of rotation of the transmitter so that their scooping lips are displaced radially with respect to this axis, and control means being provided for displacing the scoop devices alternatively in such a direction that their lips are displaced radially outwards. The scoop tube 32 operates in a scoop chamber 22 formed by a casing 17 secured to the impeller 10 'and shrouding the runner 11. The scoop tube 34 operates in a reservoir chamber formed by a casing 24 also secured to the impeller 10. The scoop tubes are carried by, and communicate with the hollow interior of, a scoop shaft 31, so that one scoop tube moves outwardly as the other moves inwardly., The scoop shaft 31 is adjusted by gearing 39, 40, 41, 42 and has ports 35 co-operating alternatively with ports 37 open to the reservoir chamber when the scoop tube 32 is operative and with ports 36 for returning liquid through ports 38 in the runner boss to the working circuit, when the scoop tube 34 is operative, the inoperative scoop tube being by-passed. When the coupling is intended to operate continuously at various partial degrees of filling of the working chamber, the valve ports 35 in the scoop shaft may be omitted and either the scoop tubes may communicate directly with each other as shown, or they may be associated with separate passages leading to the respective chambers. In place of the tubular scoop in the working chamber there may be provided a curved vane or channel section scoop device fixed on the scoop shaft and disposed. in the working chamber in such a way that it is adapted to direct the scooped liquid against a deflector which guides it into the reservoir chamber. Leak-off ports 43, 43A are provided. Where the engine is of the direct reversing type, the reservoir scoop tube 34 may be provided with two mouths pointing in opposite directions, so as to enable the working circuit to be refilled when running astern also, a flap valve being provided which automatically closes whichever of the mouths is in-operative. If the engine be stopped with the coupling full, a considerable quantity of working 'liquid escapes from the working chamber through the aperture 20 in the end wall thereof into the reservoir; the coupling is thus partly disengaged automatically, ensuring that the torque load imposed on the engine at restarting is substantially reduced. A stated application of the coupling is for connecting one of a plurality of marine engines to a common propeller shaft. Specification 328,028, [Class 69 (ii)], is referred to.