Abstract: In a convergent-divergent flap pair for a turbojet engine nozzle of the variable-geometry convergent-divergent type, the convergent flap and the divergent flap including respective ducts for circulation of cooling air connected to one another to allow cooling of each of the flaps. The duct of the divergent flap includes an impingement cooling cavity defined by two walls of lateral ends provided with air passage orifices through which the impingement cooling cavity opens towards the outside.

Abstract: In a convergent-divergent flap pair for a turbojet engine nozzle of the variable-geometry convergent-divergent type, the convergent flap and the divergent flap including respective ducts for circulation of cooling air connected to one another to allow cooling of each of the flaps. The duct of the divergent flap includes an impingement cooling cavity defined by two walls of lateral ends provided with air passage orifices through which the impingement cooling cavity opens towards the outside.

Abstract: The object of the present invention is to provide a device that allows the intermittent operation of the cooling fan, with a mechanism controlled by the stator temperature, to reduce whipping losses and improve the operating efficiency of three-phase induction motors for industrial use, such as those that operate pumps, compressors, conveyors, fans, welding machines and die cutters, among others.

Abstract: A guide assembly an enclosure-based device such as a computer provided in a rack-mountable chassis. The guide assembly is configured to facilitate blind connector mating such as electrical interconnection between a receiving connector on a previously-mounted board and an edge connector on a circuit board supported in a housing of a module that is slid or inserted into the interior space of the enclosure or chassis. The guide assembly (and devices that include a guide assembly) address the two design challenges discussed above of increasing numbers of circuits in devices that need to be connected and of decreasing pitch between the connectors. The guide assembly is configured, with its mechanical features, to decouple the degrees of freedom (DOFs) between the module being inserted into the chassis and the receiving/mating connector on the previously-mounted board. The guide assembly constrains five out of the six DOFs, which effectively ensures proper connector mating.

Abstract: A rack-mountable system is provided that includes fastening mechanisms mounted to the chassis sidewalls. The fastening mechanisms or “ears” of a rack-mountable chassis are each provided as a unitary part or piece rather than as multiple sheet metal or cast/extruded metallic parts that have to be assembled. The ear is attached or mounted to the chassis in a tool-less manner through specific design of the ear and its chassis-locking features and of holes and/or receiving/mating surfaces and/or openings on the chassis sidewalls. The left and right (or first and second) ears are manufactured in a number of ways including 3D printing, casting, and molding in a shock and impact-resistant material, such as a plastic (e.g., a thermoplastic). The chassis with the low-cost, tool-less ears are useful for mounting routers, switches, servers, digital data storage units, and instrumentation in a rack (e.g., a conventional enclosure for computer and telecommunications equipment).

Abstract: A guide assembly an enclosure-based device such as a computer provided in a rack-mountable chassis. The guide assembly is configured to facilitate blind connector mating such as electrical interconnection between a receiving connector on a previously-mounted board and an edge connector on a circuit board supported in a housing of a module that is slid or inserted into the interior space of the enclosure or chassis. The guide assembly (and devices that include a guide assembly) address the two design challenges discussed above of increasing numbers of circuits in devices that need to be connected and of decreasing pitch between the connectors. The guide assembly is configured, with its mechanical features, to decouple the degrees of freedom (DOFs) between the module being inserted into the chassis and the receiving/mating connector on the previously-mounted board. The guide assembly constrains five out of the six DOFs, which effectively ensures proper connector mating.

Abstract: A computer enclosure with a mounting assembly for accurately positioning, attaching, and supporting a circuit board within an enclosure or module without tools or fasteners. The mounting assembly includes a number of components and features that act as low-cost, tool-less mechanisms for mounting and fastening a circuit board within an enclosure with accurate locating of the board for later mating with other boards and/or electrical connectors. The mounting assembly allows for a circuit board to be installed and securely mounted to an enclosure without hardware, fasteners, and tools. This is accomplished through components that were designed and engineered to provide accurate positioning of the board within the enclosure when the board is snapped into place with a single hand of the installer and without the use of tools for fastening the board in a predefined location within the enclosure.

Abstract: A rack-mountable system is provided that includes fastening mechanisms mounted to the chassis sidewalls. The fastening mechanisms or “ears” of a rack-mountable chassis are each provided as a unitary part or piece rather than as multiple sheet metal or cast/extruded metallic parts that have to be assembled. The ear is attached or mounted to the chassis in a tool-less manner through specific design of the ear and its chassis-locking features and of holes and/or receiving/mating surfaces and/or openings on the chassis sidewalls. The left and right (or first and second) ears are manufactured in a number of ways including 3D printing, casting, and molding in a shock and impact-resistant material, such as a plastic (e.g., a thermoplastic). The chassis with the low-cost, tool-less ears are useful for mounting routers, switches, servers, digital data storage units, and instrumentation in a rack (e.g., a conventional enclosure for computer and telecommunications equipment).

Abstract: This invention relates to a magnetic modular coating for floors and walls, even in wet sites and under water, that is composed of a sole fixing element laid between a magnetic adherence decorative plate and a metallic framework structure (3). Such coating also includes a bi-directional magnetic adherence layer (4) of minimum thickness; a decorative surface layer (5), and an upper rigidifying sheet (6) made up of a laminar unit. Adhesives used can be of any kind suitable to join components together. The modules allow for a fast installation, are easily removable and can be re-used.

Abstract: This invention relates to a magnetic modular coating for floors and walls, even in wet sites and under water, that is composed of a sole fixing element laid between a magnetic adherence decorative plate and a metallic framework structure (3). Such coating also includes a bi-directional magnetic adherence layer (4) of minimum thickness; a decorative surface layer (5), and an upper rigidifying sheet (6) made up of a laminar unit. Adhesives used can be of any kind suitable to join components together. The modules allow for a fast installation, are easily removable ans can be re-used.

Abstract: Multiple use grenade, characterized in that it principally consists in the combination of a telescopic grenade (2) of a type in itself know, for example a grenade capable of being launched with the assistance of a rifle, and a fuse-plug (1) for a hand grenade, also of a type which is known.

Abstract: Telescopic grenade, characterized in that it features means (29-35) that ensure safety in the transport/storage position and means (22-19-20-21-29) that determine, under the effect of the propellent gasses, a relative transfer between the component parts (5-15) of the tail (2).

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 present invention relates to rotary engines of the type comprising a casing, assembled with two transverse end-plates and constituting a stator equipped with fluid-admission and exhaust tubes; a rotor associated with means for displacing said rotor in the stator so as to form working chambers with this latter; and rectilinear segments freely mounted in rectilinear grooves provided respectively along generator lines of said casing, corresponding to the separation edges of the working chambers on the internal surfaces of each end-plate, following at least three directions and forming a polygon surrounding the rotor-displacement means by virtue of a crossed arrangement, by overlapping of segments in pairs, especially along the radial directions corresponding to said casing segments and extending at least up to a segment of said polygon, each of these segments co-operating with other segments by slots or notches forming expansion clearances.

Abstract: The invention relates to an ignition system for an internal combustion engine, comprising a d.c.-d.c. converter coupled to the vehicle battery, a storage capacitor, an inductor, a thyristor, a delay line and an ignition transformer. The delay line operates as buffer storage means to prevent the storage capacitor and converter from being grounded during each ignition cycle, so that a plurality of abrupt, high voltage ignition pulses of predetermined width may be supplied to the ignition transformer from a battery with a low supply voltage, thus ensuring the engine starting in improved conditions.