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Mask, Gas

Object number93.211.3 a-d

Manufacturer Mine Safety Appliances Company

Date1943-1949

Mediumglass, rubber, metal, wood, canvas

Credit LineGift of Department of Labor and Mine Safety

DescriptionGas mask with box. Rubber gas mask with rubber air tube and circular glass windows; canvas holder with adjustable belt. Red metal hopcalite filter canister with rubber stopper. Wooden hinged box with leather-covered handle. Instructions glued inside top of box. MSA identification label also glued to box lid.Dimensions6.5 x 11 x 14.25 in. (16.5 x 27.9 x 36.2 cm)
Marks"MSA All-Service gas mask, model S with window-cator canister".
Label TextDetectors were used to measure the presence of methane gas in a mine. The 1930s detector has two knobs on the side, one for gathering the air sample and one for opening the battery circuit inside the detector. The air would then pass over a heated filament to register a reading. The 1960s model displays methane percentage on a round meter. The gas mask dates from the 1940s, and the safety helmet from the 1970s. Used by US Bureau of Mines employees in the aftermath of mine disasters.

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