Bloman tube breathing apparatus

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This differs from the smoke helmet in that there is neither helmet nor bellows. Fresh air is passed to the wearer through a corrugated reinforced rubber tube by means of a rotary blower. A mouthpiece having an inhalation valve, an exhalation valve, and a noseclip takes the place of the helmet. It is held in position by straps attached to a head harness. The mouthpiece can be replaced by a full-face mask. This apparatus is fitted with an equalizing device that enables the wearer to continue breathing comfortably, even should the rotary blower stop. Mason

Source: Dictionary of Mining, Mineral, and Related Terms

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