FIELD: equipment used in working zones with variable light intensity, such as electric welding shops. SUBSTANCE: safety device has composite viewing window. Lower member of viewing window is made from material on liquid crystalline base and upper member of light filter is made from light-protecting glass. Upper and lower members of viewing window are arranged one with respect to another in working space so that two-sided angle α of 90 <α <180 deg is defined at side adjacent to outlet surface of window. EFFECT: improved protective qualities of device, increased convenience and reduced fatigue of electric welder. 4 cl, 4 dwg
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|---|---|---|---|
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