Abstract: Device for adjusting the step of the mast of a sailboard or similar, characterized in that it comprises a slider receiving the foot of the mast, the slider being associated with a slide which may be secured to the hull of the board, a friction locking means acting on the slider for securing it relative to the slide and a control member provided for varying the friction of the locking member on the slider, thereby allowing shifting of the latter to the slide.

Abstract: The present invention relates to a connecting device between the wishbone 7 and the mast 2 of a sailboard, characterized in that it comprises a substantially V-shaped element 8 pivoted on each of both arms of the wishbone 7 and intended to surround the mast 2 when hoisting home the clew 6 of the sail 4 on the said wishbone 7.

Abstract: A racket of the type formed from a single metallic profile, shaped so as to define the frame, the throat-piece and the tail of the racket, the tail being defined by two mutually parallel ends of the profile, characterized in that the parallel ends are rigidly locked in relation to each other by means of at least one metallic plate disposed substantially along the whole length of the tail. In the handle portion of the racket, a metal honeycomb is disposed between the parallel ends of the profile.

Abstract: Shell for sporting cartridge of plastic material, fabricated in two parts, namely an extruded cylindrical case and a moulded cap containing base, assembled by welding, characterized by the fact that aforesaid case is provided with a conical part at one end, whereas the base is provided with a corresponding conical seat for the purpose of receiving aforesaid conical extremity of the case, the conical surfaces in contact with each other being made integral by an area of continuous welding.

Abstract: The invention pertains to a device for the fabrication of hollow plastic bodies, of the type comprising a core carrying plate, a double mould plate, means to inject plastic material into said mould plate and means to press said three plates against each other at the proper time, characterized in that it further comprises a metering plate fixed to one of said mould plates, as well as a hydraulic metering control plate facing said metering plate, said metering plate and hydraulic control plate being so conditioned to introduce, in a first step, a metered quantity of material in said metering plate and to transfer, in a second step, this quantity of material from the metering plate into the mould carrying plate, before the force-dieing resulting from pressing said plates together.