Abstract: An arrangement on a water craft for collecting oil that is present on the surface of the water, particularly among ice blocks. The underside (1A) of the craft's bow (1) has been made substantially planar and very gently inclined, for instance about 10.degree.-20.degree., so that when the craft is travelling forward the ice blocks (2) might be forced along the underside (1A) under the water and be simultaneously flushed in the water. Moreover, in said underside (1A) have been made water inlet openings, which are elongated, parallel slits (3) and which prevent the entry of ice blocks. Inside the craft, the oil (5) is separated from the water (4) by means of a separating member (6), whereafter the water (7) is pumped out again. To intensify the flushing of the ice blocks (2), the pumped-out water is jetted against the ice blocks in the region of the inlet openings (3). The bottom of the bow (1) may be slightly deeper on the sides than its planar centerpart.

Abstract: An oil-spill-combatting water craft for recovering oil which is present on the surface of water. The water craft has at the water level at least one water inlet and, secured just behind this inlet, a collecting boom (2) which extends forwards and outwards, directing water to inside the craft, where there is a separating device (5) for the recovery of the oil from the water. In the water craft of this type the difficulty so far has been that, when the craft travels at a somewhat higher speed, water pressure in front of the boom tends to rise so high that some of the oil-contaminated water (3) "escapes" under the boom (2). According to the invention, this is prevented by arranging, for at least part of the water from which the oil has been separated and which discharges from the craft, an outlet just behind the collecting boom (2). For the rest of the discharging water there is preferably arranged an outlet which is located further towards the bow than is the inlet.

Abstract: An oil-spill-combatting water craft is provided with at least one protruding boom but most suitably one on each side of the craft, the booms directing surface water and oil present in it into a conduit inside the craft, the inlet and the outlet of the conduit being located in the side of the craft. The purpose is to provide a simple, high-capacity arrangement in which the flow is, nevertheless, relatively calm also when the sea is rough. With this in mind, the conduit has been implemented as a circulation conduit the outlet of which is situated towards the bow from the inlet and in which the water flows automatically owing to the water-raising and water-guiding effect of the boom. The separating means for water and oil, fitted inside the conduit, is a rotating arrangement which allows water to flow through and is, for example, made up of rows of bristles. In front of the outlet of the conduit there is fitted a baffle which extends obliquely outwards and backwards.

Abstract: The invention relates to a boom structure in an oil-spill-combatting system. The principle of the apparatus is as follows: from the water craft (2) there extends to each side a boom, and the ends of the collecting rope (4) are secured to the ends of the booms. The oil is recovered from the rope by running the rope (4) through an apparatus (3) which is situated at the aft of the craft (2). The rope is run first in one direction and then in the opposite direction. According to the invention the rope is put into effective use, up to the last meter, by making the booms from two sections (5, 6), of which the outer one (6) turns synchronically with the passage of the rope (4) and brings each rope end alternately next to the recovery apparatus (3).

Abstract: The invention relates to a device for the cleaning of a collecting rope of oil or similar material. The device consists of a frame which is positioned around the rope and which has or to which there are connected tongues. The tongues are pressed or, by the effect of an external force, can be pressed towards the core of the rope, whereby the tongues wipe the oil or similar material off the rope as the rope passes through the device.

Abstract: A collecting rope which is intended especially for collecting oil from the surface of water, the rope comprising a drive chain which is situated inside a cylindrical part, which is surrounded by a lightweight float layer, which is surrounded by another cylindrical part, oil-collecting bristles being attached to the outer surface of the outer cylinder. The cylindrical parts can rotate in relation to the drive chain, since the joint between them consists of resilient protrusions on the inner surface of the inner cylinder. The cylinders and the chain are, however, locked to each other in the longitudinal direction.

Abstract: A device for automatic transfer of rounds of ammunition is utilized for a large-calibre firearm, for instance for ships or the like. The firearm comprises a magazine arranged on its elevating mass, and the firearm is set at a predetermined elevation at the loading of the magazine. Rounds are conveyed from an ammunition store via the underside of the mounting to the top of the mounting. A laterally displaceable cassette is arranged to receive rounds fed to it in an infeed position, and in an outfeed position to transfer rounds to the magazine when this has assumed the loading position. For the transfer of rounds from the cassette to the magazine of the firearm the potential energy of the rounds is utilized, so that no special transferring means working in the magazine need be utilized for this transfer.