DETACHABLE FASTENER FOR SIGHT GLASS OF HELMET MANUFACTURED FROM TEXTILE MATERIAL

摘要

FIELD: chemical and other branches of industry and agriculture. SUBSTANCE: fastener has two members joined together along perimeter of sight glass and positioned at both sides. Outer sizes of these members exceed and inner sizes are below that of sight glass. Each member is made in the form of frame contacting with sight glass. Frames are made from textile material with polymeric coating having friction coefficient of 0.35-0.85. Frames are stitched together along their edges for contacting with sight glass. Frames which are out of contact with sight glass are made from textile material as well. EFFECT: increased efficiency in protecting respiratory organ, eyes and skin from corrosive vapors, aerosols and dust and wider operational capabilities.