Abstract: In a method of regulating the flow rate of additional oxygen taken from a pressurized inlet for oxygen from a source and admitted into a breathing mask provided with an inlet for dilution ambient air, the ambient pressure and the instantaneous inhaled breathe-in flow rate in terms of volume reduced to ambient conditions are measured in real time. The minimum oxygen content in the complete inhalation phase in order to comply with respiratory standards is computed from the ambient pressure and the instantaneous flow rate of additional oxygen is controlled in such a manner as to satisfy the requirements of the applicable standards with a safety margin that is generally a few percent. There is also described a regulator implementing the above method.

Abstract: The invention concerns a protective breathing equipment comprising a respirator provided with a regulator designed to be connected to a source of breathing mixture under pressure and a harness having at least an extensible strap whereof the ends are connected to the respirator and comprising an element temporarily inflatable with the pressurised breathing mixture to extend the strap until it reaches a sufficient dimension to enable the user to engage the harness on his head and capable of being emptied to enable the strap, to press the respirator against his face. A flexible envelope covering the head is tightly fixed to the single strap or to the upper strap of the harness and fixed to the respirator; it is transparent at least in the portion opposite the eyes when the equipment is worn.

Abstract: The device has a face cover, a mouth-and-nose mask, and fasteners for holding the face cover on the face. The face cover is provided with a flexible gasket surrounding the eyes, a sea means at its periphery, and a closable coupling to a filtered gas feed. The mouth-and-nose mask, placed inside the face cover, is fitted with a demand regulator and with a direct exhaust to atmosphere. The breathe-in and breathe-out paths are separated by cases.

Abstract: A box for storage of passenger oxygen masks in an aircraft has a housing which contains a network for distributing oxygen from a general pipe or from a chemical generator and a door arranged to be beneath the box when it is in position in an aircraft. An inside face of the door or of the housing carries cradles defining a retaining position for each of the oxygen masks and latches that are displaceable responsive to closing the door from a position in which they define mask-retaining sockets to a position in which the latches release the masks.

Abstract: A box for housing breathing masks in a passenger aircraft has a housing closed by a door and a pipe in the housing for delivering respiratory gas under a first pressure to the masks via a flexible line. In rest condition a catch holds the door in closed position. It may be disabled for providing access to the masks. A command, electrical or in the form of a second pneumatic pressure in the pipe, limits the opening of the box to a partially-open position preventing the masks from falling out upon release of the latch.

Abstract: Protective breathing equipment comprises a breathing mask provided with a regulator for connection to a source of pressurized breathing gas and a harness having at least one extensible strap whose ends are connected to the mask and which includes an element that is temporarily inflatable by the pressurized gas to lengthen the strap until it is large enough to enable the user to engage the harness on the head, and exhaustible to allow the strap to press to press the mask against the face. The extensible strap is connected to the face-piece by at least one mechanical member of length that is adjustable by the user while wearing the equipment.

Abstract: The equipment has a helmet, a full face-cover fitted with fastenings for fixing it to the helmet, and with a coupling for connection to a breathable gas feed hose. It also has a flexible envelope extending the helmet and the face-cover downwards. For leakproof junction between the helmet, the face-cover and the envelope, a hoop is sealingly connected to the helmet. It has a lower branch which constitutes a closed bottom loop for receiving the envelope and a transverse branch having one side designed to sealingly receive the shell of the helmet and an opposite side which sealingly receives the face-cover. A plug rigidly fixed to the face-cover and placed in a vertical midplane of the face-cover, at the bottom thereof, engages a socket pivotally connected to the hoop. Lateral fasteners complete the connection.

Abstract: The head harness includes at least one expandable strap whose ends are connected to the mask for constituting a loop. The strap includes an element which is inflatable by pressurized gas for lengthening the strap up to a size sufficient for the user to locate the harness over his head. Pressurized gas is supplied to the element for increasing its size upon actuating of a manually controlled valve. Upon release of the valve, the strap contacts the head and maintains the mask. A selection valve authorizes venting of the inflatable element when in an "emergency" position and maintains a residual pressure in the inflatable element when in a "comfort" position. The harness or a storage box for the mask are designed for preventing storing of the mask in "comfort" position.

Abstract: An apparatus for protecting a wearer against positive acceleration comprises:a trouser having inflatable pockets and a control unit having an outlet communicating with the pockets, an inlet communicating with a source of pressurized gas and an inertia body for sensing acceleration. The control unit inflates the pockets with pressurized gas under a pressure which increases responsive to positive acceleration according to a predetermined law when the positive acceleration exceeds a predetermined threshold higher than 1 g and modifies the predetermined law following detection of a degree of acceleration which is negative or lower than another threshold lower than 1 g.

Abstract: For humidifying the air in an aircraft cabin, individual spray nozzles are each directed towards a zone including the face of a passenger and fed with water via a controllable closure valve. Typically, each spray nozzle is fed by a respective cartridge or can of pressurized water located in a receptacle formed in a seatback.

Abstract: The breathing protection equipment includes a mask having an inflatable harness and a demand regulator with three operating modes which are manually selectable. The operating mode is indicated to the wearer of the mask by a repeater. The repeater has a mode sensor carried by the mask and a mode indicator located in the field of view of the wearer and driven by the mode sensor. The mode sensor may detect the position of the switch actuated by the user for changing the mode. The mode indicator may be a display on a mask storage box or on the mask.

Abstract: In order to make a personalised helmet liner using a rigid injection shell, a cast of the user's skull is made from a quick-setting product; the desired position of the user's head and the cast relative to a predetermined helmet reference frame is determined on an optical bench and a reference support (30) is fixed to the cast; a dummy head provided with a positioning support relative to the rigid shell is moulded in the cast by comparison with the reference support; the dummy head is placed inside the rigid shell and the dummy head and the shell are positioned relative to one another by using an indicator (31) on the support, and an expandable foam is injected into the space between the rigid shell and the dummy head.

Abstract: A respiratory protection apparatus has a breathing mask with a regulator and a fast donning harness having at least a pair of extensible strap whose ends are connected to the mask. Each strap has an element which is inflatable by the pressurized breathable gas for extending the strap until it has a sufficient size for enabling the user to quickly don the harness over the head and deflatable to permit the strap to tighten, to urge the mask against the face and to maintain the mask on the face. An ear piece is connected to the harness or mask and is applied against the ear when the harness straps are deflated.

Abstract: The equipment for military aircraft pilots comprises a helmet (10) having a shell and a visor (18) for placing in front of the eyes. A central portion of the visor is of a shape such that at each point its minimum radius of curvature is substantially in a vertical plane and its maximum radius of curvature is in a plane substantially orthogonal to the preceding plane. The radius of curvature of the visor in the horizontal plane lies in the range 110 mm to 145 mm and its radius of curvature in a vertical plane parallel to the midplane of the helmet varies from about 135 mm in the center to about 75 mm in lateral zones.

Abstract: The head harness includes at least one expandable strap whose ends are connected to the mask for constituting a loop. The strap includes an element which is inflatable by pressurized gas for lengthening the strap up to a size sufficient for the user to locate the harness over his head, pressurized gas is supplied to the element for increasing its size upon actuation of a manually controlled valve. Upon release of the valve, the strap contacts the head and maintains the mask. A selection valve authorizes venting of the inflatable element when in an "emergency" position and maintains a residual pressure in the inflatable element when in a "comfort" position.

Abstract: The control apparatus is suitable for use on airplanes. It has a digital computer, order-issuing devices for issuing settings in the form of digital messages including data plus a label number identifying the message in a standardized format. Actuators implement the settings under the control of the computer. The apparatus also has decoders which decode the digital messages issued by the order-issuing devices, typically in ARINC form, and a voice synthetizer provides a voice announcement specifying in the clear the setting as actually issued.

Abstract: The equipment comprises a helmet (10) having a rigid shell and inside padding, a balaclava-like hood (26) for separating the head from the environment and designed to be worn directly on the skin, and a mouth-and-nose breathing mask (20) provided with a duct (22) for coupling to an external source of breathable gas, and provided with means (16) for fastening to the helmet. The hood comprises a web (28) in which at least one opening is formed for placing over the eyes of the wearer, and removable transparent goggles (30) provided with means for fastening to the hood and/or to the helmet in a position where the edges of the goggles bear in airtight manner against the web around the opening.

Abstract: The protective equipment for the head comprises a breathing mask provided with a harness and connectable to a source of breathing gas, together with a screen (22) for protecting the eyes against smoke, the screen being provided with a peripheral sealing gasket (26) that presses against the face and against the mask. The mask and the screen are distinct and separable. Manually releasable locking means lock the screen to the mask and bear against the mask so as to press the gasket against the face. The equipment is particularly intended for use by aircraft flight crew members.

Abstract: A respiratory mask adapted to be fit against the face of a user is provided with a demand regulator connectable to a pressurized respiratory gas source. An extensible harness, having end portions connected to said mask, includes an inflatable element. A manually actuatable valve delivers pressurized respiratory gas from the source to the inflatable element to extend the harness when actuated and reduces the pressure in said inflatable element to retract said harness and to cause the mask to engage the face of the wearer when released. A sensor delivers an information representative of a force with which said mask engages the face to a valve for automatic control of exhaust of pressurized gas to atmosphere and admission of pressurized gas from the source, upon release of the manually actuatable valve to adjust the reduced pressure and to maintain the force at a value which is lower than the force exerted when the inflatable element is at an ambient pressure.

Abstract: The equipment is usable by a person exposed to NBC threats. It has a helmet, a face-cover provided with fastenings for connection to the helmet and with a coupling for a breathing gas feed or ventilation hose. A flexible envelope extends the helmet and the face-cover downwards. For providing sealed connection between the helmet, the face-cover, and the envelope, a hoop is fixed to the helmet in permanent or removable manner. It projects from the base of the helmet forwards. The top edge of the hoop receives the face-cover and the lower edge hoop receives the envelope in sealed manner.