DUSTPROOF PROTECTIVE HELMET Russian patent published in 1998 - IPC

FIELD: devices for protecting individual's respiratory organs and face from environment characteristic of plants or houses of metallurgical, chemical and other branches of industry. SUBSTANCE: helmet has flexible magnetic airduct 1 with guides made from magnetic glass, magnetic viewing shield 2 and 0.3-0.5 mm thick L-shaped plate 3 made from magnetic glass. One magnetic cross-piece 4 of L-shaped plate 3 is positioned under screen 2 and separated from it by space 5 and other magnetic cross-piece 6 is separated from outer side of magnetic glass of screen 2 by space 7. Helmet is fastened by transparent neck cape 8 running from one edge of screen 2 to the other edge. Helmet is fastened on individual's head by belt 9. Viewing screen is made from magnetic glass containing, % by weight: barium oxide 45; manganic oxide 35; nickelic oxide 10; silicon dioxide 10, and having magnetic field intensity of 100 Oe. Dust catching airduct hose is made from magnetic glass containing, % by weight: barium oxide 50; ferric oxide 40; carbonic acid samarium 10, and having magnetic field intensity of 2-5 kOe. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 2 cl, 1 dwg