Abstract: The invention relates to a device for keeping cards, said device being provided with at least one card holder in which a card can be held at at least some of its edges, while the card holder is rotatably connected with lids located above and under the card holder. The card holder is provided with four legs bounding a rectangular through opening the size of a card to be accommodated, the legs forming a closed frame with external dimensions at least substantially equal to the external dimensions of a lid. The legs are provided with parts projecting into the opening, such that a card inserted into the opening is enclosed between at least one pair of projecting parts forming part of two opposed legs, said parts butting against the upper surface of the card, and at least one pair of projecting parts, which also form part of two opposed legs and which butt against the lower surface of the card.

Abstract: The invention relates to a device for breaking off piles, said device being provided with a frame and at least one cutter which is movable to and fro in its longitudinal direction by means of a setting cylinder supported by the frame. The cutter is guided in an elongated passage, whose boundary wall is shaped such that at at least one location between the boundary wall of the passage and the outer circumference of the cutter there is present a recess extending in the longitudinal direction of the cutter and being open at both sides.

Abstract: A device for breaking up concrete piles comprising a housing bounding a passage and having two relatively parallel plates, to which are secured supports extending between them, to which supports are fastened hydraulic rams each having a piston rod, to the end of which is fastened a chisel which can be displaced through the passage with the aid of the hydraulic ram concerned, the chisels being passed through openings matching the cross-sections of the chisels and provided in screening plates bounding the passage and extending between the relatively parallel plates.