Abstract: Safety device for oil filters and the like, having a casing containing a filtering cartridge, wherein a piston is entered with a frictional fit in said casing against a spring means, said piston being forced towards the bottom of the casing into a waiting position by the insertion of said cartridge; at least one oil passage being provided through said piston, said spring means returning the piston in its active position upon removal of the cartridge from the casing and a means being provided for releasably locking said piston in its active position.

Abstract: Automatic or semi-automatic sporting weapon of the type with gas tapping, characterized by the fact that it is fitted with a floating barrel.

Abstract: The invention pertains to a set of golf clubs of the type known as irons, wherein the center of gravity of each head is placed very low while the height of the frontal area of the heads is a constant throughout the set.

Abstract: Closing device for the slot through which passes the cocking lever of automatic weapons, the slot being provided in the casing of the latter, characterized by the fact that it is mainly made up of: a shaped flap provided with a cut-out portion at each of its ends; two posts which are integral with the casing and pass through each of aforesaid cut-out portions; and a spring hooked by its ends onto aforesaid posts and attached in its center to aforesaid flap, so as to press the latter against the casing and to stress it towards its closing position of the slot.

Abstract: The invention pertains to a device for supplying portable arms by means of cartridge belts and by means of rifle magazines using the same ammunition, characterized by the fact that the weapon is provided with a lateral opening, extended by a sleeve which can serve the purpose of guide for a magazine, aforesaid sleeve being fitted with a flap which is conditioned in such a manner that it can close aforesaid sleeve and be used as guide for the cartridge belt, the bolt having two tenons, one of which is used to act upon the cartridges of a belt, one by one, and the other operating to act, one by one, upon the cartridges of a magazine.

Abstract: The invention pertains to an adjusting device for double-barrelled guns, characterized by the fact that it consists principally of two elements provided with accessory parts located between the barrels, one of these parts forming an incline for the other which acts as a wedge, one at least of aforesaid elements being capable of being moved wth respect to the other.

Abstract: The invention pertains to a rotary engine characterized by the fact that it consists of a cylindrical outer shell and of a concentric internal cylindrical body, between which operates a coaxial rotary piston which is also cylindrical, and of a chamber for air or carburetted fuel mixture under pressure, for feeding the engine.

Abstract: A process for knitting a composite piece or panel on a straight bar knitting machine with double needle bed, provided with a presser foot device that is adjustable to operate at either of two preselected levels, each level corresponding to a level suitable for rib or jersey knitting, the piece or panel comprising at least one area of jersey knitting and one area of rib border knitting, characterized by the fact that it comprises the steps of starting a first knitting operation with the presser foot at the most appropriate level for the first area of knitting to be manufactured (rib or jersey); subsequently locating the presser foot at a second level which is adapted to the second area of knitting (jersey or rib) and continuing the knitting operation without interrupting the overall knitting operation of the machine to knit the other area of the piece or panel.

Abstract: An improved presser foot device for straight bar knitting machines with double V needle beds, characterized by the fact that means are provided whereby the presser foot can be moved by the program controller of the machine automatically from one to another of two preselected hold down levels, one of which is appropriate for "rib border" knitting and the other for "jersey" knitting. A specific shape of presser foot is also disclosed, comprising a thin, flat configuration including a first wide section located towards the advancing end of the presser foot, a second markedly narrower section connected to the first section at an abrupt change in width and trailing the first section with respect to the advancing direction of the presser foot, and a third section trailing the second section, the third section being wider than the second section and connected to the latter along a gradually tapered section.

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.

Abstract: The invention pertains to improvements to axial piston pumps of the type comprising, in combination, at least a plurality of annularilly distributed pistons housed in cylinders of a fixed block and in permanent contact with an inclined plate fixed to a pump shaft, an annular rotatable valve mounted on an eccentric fixed to said shaft, and means ensuring an axial hydrostatical compensation, characterized in that said means comprise, for each piston housing, a pocket provided in said block and an axially movable bobbin housed in said pocket, said pocket and bobbins facing an annular flange carried by the shaft of the pump.

Abstract: The invention pertains to an improvement to gun barrels of the type provided with a fixing and guiding ring having a base which is brazed or welded on to the barrel, wherein the aforesaid base has, on at least one of its transverse faces (with respect to the axis of the barrel), a groove or chink near said base.

Abstract: A fuse of the type disclosed in U.S. patent application 476,194 has a rod passing through a supporting disc and is axially shifted for releasing a rotor mechanism, it is provided with a head having a diameter larger than that of the said rod and which is in blocking relation to the rotor, said disc being blocked by a stationary disc forming a stop in fixed position and being locally deformed by the axial shifting of the said rod when the fuse is armed.

Abstract: Throwing device for grenades by means of a weapon such as a rifle, a tubular casing extending the rear portion of the grenade, said device comprising a bullet trap housed within, wherein said bullet trap comprises two main parts, namely a hard mass under the form of a truncated revolution body and a bearing disc adjoining the large base of the said mass.

Abstract: The invention pertains to a device for packing and handling cartridge magazines or suchlike, characterized by the fact that it mainly consists of a straight portion of some strong section of which the two longitudinal edges are bent over in U-shape; one of the ends of the section being provided with a retractable flap in one sense, and the other end being foreseen with a hinged handle.

Abstract: Improved needle bed for flat knitting machines of the type having needles with heels which may be sunk within the bed, comprising, for each sunkable needle, an oscillating lever, one bifurcated end of which receiving the tail of the associated needle, while its other end is subjected to the action of a control member which may be reciprocated through the intermediary of selecting means.

Abstract: The invention pertains to a belt ammunition box for portable weapons of overall prismatic shape, characterized by the fact that its front face consists of a tightly closing door which, together with a cut away portion of the upper surface of the box, bounds a passage for the belt of cartridges, aforesaid passage being, at the start, closed by a closing element made up of a platelet and a dummy link associated with one of the ends of aforesaid belt.

Abstract: The invention pertains to a fuse for rifle-grenades and similar, wherein means are provided to visually indicate whether the first element of the pyrotechnic claim of the fuse, for instance a detonator, is live or not.

Abstract: The invention pertains to a device for firing a grenade or similar projectile using a weapon such as a gun, of the type which comprises a tubular case affixed to the rear of the grenade, a bullet trap being inserted into the said tube, said trap consisting of a steel mass, sub-calibrated to correspond to the said tube and having, near each of its ends, one or more centering edges resting on the inner wall of the said tube, or on a corresponding portion of the body of the grenade.