Other

Molins Plc

Cam Lock (uk) Ltd.

Joseph A Griffiths

Robert E Williams

Donald M Smeaton

A flexible oro-nasal mask for mounting in a rigid shell attached to the helmet of aircrew at a fixed distance therefrom. The flexible oro-nasal mask incorporates an inspiratory and expiratory valve and the periphery of the mask is adapted to make a seal with the pilot's face. The oro-nasal mask includes an extendable structure which presses the periphery of the mask automatically towards the pilot's face to improve the seal therewith when gas at a pressure above that required for normal breathing is supplied to the mask. The extendable structure is configured so that when gas at a high pressure is supplied to the interior of the mask, the portion in the bottom region of the mask extends more than the portion in the upper region of the mask and the bottom of the mask is moved away from the wearer's face by a greater amount in the chin region than the nose region and the mask pivots upwardly automatically to compensate for the effects of G thereon. One embodiment of an extendable structure comprises an annular inwardly directed re-entrant recess formed in the wall of the mask adjacent the peripheral seal, the depth of said recess in the bottom half of the mask being greater than the depth in the top half thereof.

High G oxygen mask for aircrew

A flexible seal (2), particularly for use in pneumatic testing of cigarettes, includes a conical seat (6) attached to a tube (4) having a resilient collar (8). The collar permits longitudinal movement of the seat relative to the tube, thereby permitting an effective seal against the cigarette being tested, and contributes to extended life for the seal.

Cigarette testing device

Breathing equipment for aircrew

An under helmet hood for aircrew which has a butyl rubber cowl (1) and, severed but in no way displaced therefrom, a face mask portion which includes a face mask (2) having a fixed vizor (3). The perfect butt joint remaining in the butyl rubber between the cowl (1) and the face mask portion is covered by a longitudinally grooved neoprene strip (5), glued in position during manufacture before the cowl is severed, having a rip toggle arrangement which enables tearing of the strip along its groove (9) to be initiated. The face mask portion is then readily ripped out by further tearing of the strip along its groove and separation of the face mask portion at the butt joint. The invention enables reliable protection against all NBC agents and yet at the same time affords excellent rip off facility.

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Haslemere, United Kingdom

Joseph A Griffiths