A method includes providing an article having an impact side and an asset side and exposing the impact side of the article to a plurality of pressure waves, the pressure waves having a plurality of pressure wave frequencies. The method also includes reflecting at least one composite harmonic of a portion of the pressure wave frequencies and reducing an amplitude of a portion of the pressure waves.

The present invention refers to a bullet- and blast-resistant window, in particular for use in a motor vehicle, which comprises a ballistic block having a peripheral face and a plurality of panes of glass, ceramic or plastic material bonded to each other over their surfaces in a layered composite, and interposed bonding interlayers of plastic material or adhesive, wherein an edge groove having slopes at least partly inclined for engagement with a part of the vehicle body and extending on and along at least a part of the peripheral edge of the window.

A blast-resistant escape window for an armored combat ground vehicle has a cassette which fits within, and closes, a though-opening in a frame of a windscreen. Two releasable lever-operated locking mechanisms for releasably locking the cassette in the through-opening are mounted on the windscreen at opposite sides of the through-opening. The cassette can to be pushed out of the through-opening when the locking mechanisms have been operated to release the cassette from being locked to the windscreen, thereby providing an alternative exit for personnel in the vehicle.

A transparent composite armor is made of tens to hundreds or even thousands of thin layers of material each with a thickness of 10-500 μm. An appropriate amount of impedance mismatch between the layers causes some reflection at each interface but limit the amplitude of the resulting tensile wave below the tensile strength of the constituent materials. The result is an improvement in ballistic performance and that will result is a significant impact in reducing size, weight, and volume of the armor.

An example barrier can be switchable between an at least partially collapsed state and at least partially expanded state (e.g., a deployed state). For example, the barrier can be formed from a sheet and a plurality of rigid sections (e.g., rigid panels) attached or incorporated into the sheet. The barrier can also include a plurality of hinges, such as hinge lines, between the panels that are formed from the sheet. The hinges enable the barrier to be rigid foldable (e.g., the hinges can fold and unfold while the rigid sections remain stiff and rigid) between the expanded and collapsed states.

An optically detectable antiballistic plate, and a method of producing it are disclosed. The antiballistic plate includes a core of a ceramic plate, coated with a transparent fibre-reinforced surface composite layer of plastic matrix and reinforcement fibre. Cracks visible to the human eye in daylight will occur, in the event of damage to the ceramic plate.

A stile and rail ballistic security door containing bullet proof materials within a metal or synthetic material frame including a plurality of window panes and thermal break means to eliminate condensation problems therein. The door contains a multi-layer exterior core providing extra strength and rigidity.

A transparent, shatterproof, bullet-resistant glazing with fire protection properties, consisting of a ballistic block constructed from at least two transparent panes adherently bonded to one another by at least one transparent, adhesion-promoting layer, wherein each pane has a thickness of at least 3 mm, a fire protection unit constructed from at least two transparent panes adherently bonded by a transparent, intumescent layer, and at least one spacer between the fire protection unit and the ballistic block, the surfaces of the unit and the block being arranged parallel or substantially parallel to one another such that a hollow space is situated therebetween.

A fireproof/bullet-proof safety glazing that includes a laminated assembly I of glass sheets, the laminate I, the glass sheets of which are assembled by means of thermoplastic interlayer sheets and n layers of intumescent material made from hydrated alkali silicate, with 1≤n≤3. The laminate I also includes a fireproof module comprising the n layers of intumescent material made of hydrated alkali silicate and n+1 glass sheets, the module being flanked on either side by at least one interlayer thermoplastic sheet and at least one glass sheet. The laminate I does not include organic glass sheets made from a polymer material that is rigid at ambient temperature. The glazing includes at least six glass sheets.

Processes for making lightweight armor, hardened casts, hardened parts, nonstructural reinforced hardened casts, structural shrapnel-resistant blocks, attachable hardened surfaces, and for hardening surfaces utilize rare earth material nanoparticles including metal anhydride nanoparticles that are refined under supercritical conditions.