FIELD: equipment for working by laser beam with use of optical fibres for directing irradiation to blank. SUBSTANCE: protective mask includes shield for protecting operator face and shield for protecting his neck in order to provide safety operation at using laser beam for working blank. When operator puts mask starting switches placed in mask close. Laser burner, electric current conductive clamp and laser are connected in series. When blank contacts with end of cone nozzle of laser burner and with electrically conductive clamp laser is excited due to supplying to it electric current of power source. It prevents accidents caused by direct irradiation of operator by laser beam in case of unexpected current passing. EFFECT: improved safety of apparatus. 10 cl, 5 dwg
