Abstract: This invention relates to a belaying clamp for releasably fixing a stretching rope to the boom or mast base of a windsurfing craft. To permit the sail to be retrimmed with a relatively small effort and while the craft is on the water, the belaying clamp (10) is directly connected to the boom (1) or mast base by means of an adjusting element (5).

Abstract: A sailboard including a centerboard contained in a housing and which may be pivoted by the foot of the user from the upper face of the sail-board. In order to provide a simple and inexpensive actuation device for the center-board and which practically prevents any possibility of injury, the center-board is provided with a pawl which may be inserted into one of the ratchet recesses provided on or in the housing of the centerboard. The pawl is carried by a slide which may be radially displaced in the centerboard with respect to the axis thereof. The outer end of the slide is provided with an actuation member and a spring holds its ratchet position. When the center-board occupies a middle position, the slide is approximately perpendicular to the surface of the sailboard.

Abstract: A device for securing a forked boom to a mast and includes clamping elements, which engage the mast and are provided on a retaining member which at least partly surrounds the mast. The retaining member is annular and is larger in diameter than the mast. At least one wedge-shaped clamping element is slidably mounted in the annular space between the retaining member and the mast.

Abstract: This invention relates to a boom end piece, which has at least approximately the shape of a U or V and is adapted to be connected by a plug joint to two tubular spars of a boom of a sailboard rig. The two leg ends of the end piece consist of pegs and the end piece consists of two one-half sections, which are rigidly connected to each other and each of which comprises two half pegs.

Abstract: A sailboard is provided with foot-retaining loops, which are made of flexible and/or elastic material and at their ends are secured to the board. In order to ensure a reliable release also in the case of twisting falls, at least one end of the foot-retaining loops is connected to the sailboard by a snap fastener, which can be opened by tension and/or torsion and/or a transverse displacement.

Abstract: A mast foot for sailing boards comprising a holder securable to the sailing board and a connector which is connected to the holder by a universal joint and can be connected to the mast. The holder and connector are provided with curved faces which frictionally roll on each other during movement, in all directions, and which positively interengage to provide the universal joint. The holder and connector are held together by an elastic tension member. In one embodiment, the older is a half cup and the connector is a bearing sphere supported by the half cup. In another embodiment, the holder is provided with a ring having a bead-like edge and the connector has a complementary annual groove.

Abstract: The sailboard has an opening, which contains a tongue of a mast base, which is articulatedly connected to the mast, so that the mast base is detachably connected to the sailboard. One side face of the opening is provided with a detent cam, which is adapted to be depressed against spring force and has an oblique or curved camming surface, which is adapted to snap behind the step or stop as the tongue is inserted into the opening.

Abstract: Safety ski bindings offer an adequate safeguard against erroneous release if they possess an adequately large resetting capacity. To test this resetting capacity, the ski boot is repeatedly displaced through a constant distance by a pressure pin applying a constant force thereto during constant time intervals. If the ski boot fails to return to its starting position during constant time intervals against a fixed resistance, then this is indicative of an inadequately large resetting capacity because the residual distances remaining after each displacement will be summated and eventually cause release of the binding.

Abstract: A device for connecting a sailmast to a sailboard comprises a mast-connecting universal joint, which is connected at one end to the mast and is permanently fixed thereto or can be only arbitrarily separated therefrom and is connected at its other end to a supporting member, which when the device is in position for use is received at least in part by a recess in the upper surface of the sailboard so as to be positively connected thereto. To provide for an overload coupling, the supporting member is constantly biased by a spring so that the positive connection can be eliminated only when the spring force is overcome.

Abstract: A mast-connecting universal joint is provided, which is connected at one end to the mast and is permanently fixed thereto or can be only arbitrarily separated therefrom, and which is connected at its other end to a supporting member, which is biased by a resilient element and in position for use is positively held in a slide, which is longitudinally slidably guided and adapted to be resilient locked in a groove of the sailboard. The resilient element constitutes a return spring for the supporting member when the mast is in any position of use, and a return spring for moving the longitudinally slidable slide to a position in which the slide is releasably locked.

Abstract: A cable is connected at one end to the skiing boot and at the other end to the ski. Detent elements are provided to hold the skiing boot in skiing position on the ski. A mounting fixture is secured to the ski approximately in the middle portion thereof and is connected to the cable. A tensioner is connected to the cable and causes the latter to hold the detent elements in engagement with each other. A single detent device is provided, which comprises a one-base or two-base segment of a sphere or ellipsoid and a mating cap. The cable extends at the center of one detent element and through the center of the other detent element. The tensioner always loads the cable, in a manner known per se. Where the detent device comprises a segment of a sphere, said segment has at least one protection and the cap has a mating interior recess.

Abstract: A baseplate is mounted on the upper surface of the ski adjacent to the heel of the skiing boot and extends normally in the longitudinal direction of the ski and is rotatable on a vertical axis against a preferably adjustable resistance. A boot carrier is hinged to the baseplate at the forward end of the latter and holds the skiing boot so that the latter is only arbitrarily detachable. The rear end of the boot carrier is lifted from the baseplate against a preferably adjustable resistance. The boot carrier comprises a frame and extends across the baseplate adjacent to the skiing boot. The forward end member of the frame constitutes a hinge pin, which is rotatably mounted on the baseplate. The rear ends of the baseplate and boot carrier are connected by a spring-loaded tension cable and winder assembly.

Abstract: In a sailing board having a tiltable and rotatable mast which is held by the user during sailing and is supported on the board by a base fitting, a lower portion of the mast adjoining the base fitting is flexible and is bridged by a resilient mounting.

Abstract: The foot of a mast is connected to a sailing board on which the user stands while also holding the mast during sailing. The location of the connection is variable longitudinally of the board during sailing, whereby the most favorable point of application of the wind force to the board can be selected by the user.

Abstract: In a safety ski-binding for connecting a ski boot directly to a ski or over a sole plate of the ski by means of an extensible cable near each of the front and back of the boot, extension of the cable being resiliently opposed by the spring of a cable drum and the cable being only deliberately detachable from the boot or sole plate, the boot or sole plate is held to the ski against vertical as well as horizontal motion by two latching devices each comprising a catch member on the ski or on the boot or sole plate and a latch member movable with respect to the catch member and biased into engagement therewith by the cable.

Abstract: In a safety ski binding for the automatic release of a ski boot from a ski in a case of danger, a releasable boot-holding member is secured by locking means comprising two interacting locking members. At least one of the locking members is carried by a supporting member so as to be displaceable within limits in the releasing direction of said boot-holding member.

Abstract: A safety ski binding system comprises a heel-hold device and an abutment mounted on the ski as well as the sole of the skiing boot. The heel-holding device normally forces the sole of the boot against the abutment and in response to a vertically and/or horizontally directed overload releases the skiing boot. The abutment consists of a disc, which is secured to the ski to be at least approximately coaxial to the tibia and when the skiing boot is applied extends into a corresponding recess in the sole of the boot.

Abstract: In a safety ski-binding comprising an elongated sole plate for supporting a ski boot, sole depressors provided on the sole plate for releasably retaining the boot thereon and mounting means for holding the sole plate to the ski except on the occurrence of an overload, the sole plate is provided with at least one transverse horizontal pivotal axis disposed in the region supporting the ball of the boot so that the sole plate can bend to an upwardly concave shape and adapt itself to a corresponding curvature of the ski during use. The sole plate may be made in two or more parts which are hinged to one another, in which case the or each hinge line constitutes the respective pivotal axis, or at least the ball-supporting region of the sole plate may comprise a thin and flexible sheet having a plurality of juxtaposed transverse members secured to its underside.