Abstract: In a plant comprising one or more electric machines constructed with insulated conductors and connected for heavy current via insulated conductors, the magnetic circuit in at least one of these electric machines is connected directly to a high supply voltage of 20-800 kV, preferably higher than 36 kV. The insulation of the electric machine is built up of a cable (6) placed in its winding and comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by outer and inner semiconducting layers (34, 32) and intermediate insulating layers (33). The conductors (31) may be group-wise connected in parallel and semiconducting layers are therefore not required around every conductor in the group.

Abstract: In a plant comprising one or more electric machines constructed with insulated conductors and connected for heavy current via insulated conductors, the magnetic circuit in at least one of these electric machines is connected directly to a high supply voltage of 20-800 kV, preferably higher than 36 kV. The insulation of the electric machine is built up of a cable (6) placed in its winding and comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by outer and inner semiconducting layers (34, 32) and intermediate insulating layers (33). The conductors (31) may be group-wise connected in parallel and semiconducting layers are therefore not required around every conductor in the group.

Abstract: A propulsion arrangement for a marine vessel having a propulsion unit. The propulsion unit includes a non-rotating housing in the form of a nozzle extending along a principal axis, the nozzle having an inlet opening, an outlet and an internal diameter; a propeller mounted for rotation within the nozzle, the propeller having a plurality of blades radially outwardly delimited by a periphery; a support shaft extending along the principal axis of the nozzle and to which shaft the propeller is affixed; and a support shaft support member in the form of a plurality of arms extending substantially radially from the inner surface of the nozzle to a bearing hub for the support shaft. The plurality of arms are located upstream of the propeller, the arms being shaped so as to impart a pre-rotation on the flow of water upstream of the propeller. The internal diameter of the nozzle gradually decreases from a maximum at the inlet opening to a minimum within the nozzle and then increases towards the outlet.

Abstract: The invention relates to an arrangement in propeller installations including means for supplying motor exhaust gases to the vicinity of the propeller (7). The invention is characterized in that a gas outlet (4) is located immediately forwards of the propeller and directs the gas flow towards the sweep of the blade tips of the propeller.

Abstract: A boat propeller drive with double, counter-rotating propellers is distinguished by the after propeller having one more blade than the fore propeller as well as a smaller diameter than the fore propeller.

Abstract: An inboard outboard drive is at the housing portion passing through the hull provided for sealing and damped support, with a resilient element with a non-collapsible cross-sectional shape which is subject to a constantly acting compressing force, conveniently generated by the weight of the engine. When cracks occur in the resilient element, the edges of the cracks are pressed together by this compressing force, whereby penetration of water into the hull is prevented or at least rendered more difficult. The invention is suited for application in inboard outboard drives of the S-type as well as of the Z-type.

Abstract: An inboard outboard drive for boats, particularly planing boats, of the S-type comprising an inboard engine and a vertical propeller leg having an upper inboard end and extending through an opening in the hull to an outboard propeller carrying portion. The engine has a horizontal output shaft with a universal joint driving shafting extending through the propeller leg to drive the propeller. The propeller leg for side steering is pivotally mounted in a watertight bearing which is located inboard and is inclined so that the bearing axis, defining the side steering axis, passes through the universal joint. The drive is supported near its forward end on two vibration damping supports mounted in the hull and supporting the engine, and on a resilient damping member mounted in the hull and supporting the projecting portion of a bracket which supports the propeller leg to reduce the lever arm of the propeller thrust.

Abstract: An inboard outboard drive having a structural part which passes through an opening in the hull of a boat. A mounting shield for supporting the structural part is at its inner portion provided with symmetrical receiver grooves into which the support flanges on the structural part may be selectively inserted in either one of two reversed positions and has in an outer portion an asymmetrically located flange for securing to the hull. The shield may according to need be put on the inner or outer side of the hull, depending on which of them is more even than the other.