Abstract: A propulsion mechanism (100) for a maritime vessel (200) including a rotor (75) mounted for rotation about a rotor axis. The rotor (75) includes a plurality of vanes (20) extending essentially radial to the rotor axis and the vanes are arranged to define spaces (25) in between the vanes (20). The propulsion mechanism (100) further includes means configured for freeing the spaces (25) of water by means of application of air.

Abstract: A propulsion mechanism (100) for a maritime vessel (200) including a rotor (75) mounted for rotation about a rotor axis. The rotor (75) includes a plurality of vanes (20) extending essentially radial to the rotor axis and the vanes are arranged to define spaces (25) in between the vanes (20). The propulsion mechanism (100) further includes means configured for freeing the spaces (25) of water by means of application of air.

Abstract: Use of an oxygen sensor comprising a membrane, preferably in the form of a first tube (2), which is substantially made of zirconium dioxide and has an internal and an external coating (3, 4) of an electrically conductive, catalytic layer. On the electrically conductive, catalytic layer, a porous, preferably ceramic layer (5) is provided. The porous layer (5) is provided on the electrically conductive, catalytic layer (3), which is located at least partially within a second tube (6), made of a gas tight material. The oxygen sensor, which is part of a clamped together structure with O-rings, may be used in a method, in which the measuring gas, especially a reactive measuring gas, is supplied to the external side of the first tube (2).

Abstract: A specimen holding plate (1) for a gas permeability measuring apparatus. The specimen holding plate comprises a first surface (2) and a second surface (3), a number of passages (11, 12) between said second surface (3) and said first surface (2) so as to allow a predetermined gas mixture to be supplied to a first volume located at least partially about said first surface. The specimen holding plane further compresses a sealing arranged in a connection with said first surface and circumscribing said passages (11, 12) so as to circumferentially delimit said first volume. The sealing is provided as a double sealing (7, 8).

Abstract: A service unit comprising a frangible mounting means and a hollow body adapted to be mounted on a supporting surface by the mounting means. Mounted within the hollow body are power distribution means, and power metering means, and at least one lighting means. The hollow body is provided with a plurality of apertures with releasably securable covers. Water, telephone and other service equipment can also be mounted within or attached to the body to provide the desired service capabilities.

Abstract: An underwater light which is fitted to the walls of swimming pools or tanks and is immersed in water. The electrical wires are connected to respective contact pins on the rear of the light and are individually sealed with a polyurethane varnish or silicon rubber over which are shrunk head-shrinkable rubber or plastic sleeves. The light may be recessed in the walls of the pools or tanks or may be fitted to suitable mounting blocks.