Odd Ventilator Pumps Pure Air to Bomb Cellar (Apr, 1940)
Odd Ventilator Pumps Pure Air to Bomb Cellar
Knowing that poison gas seldom rises more than thirty feet above ground level, a British inventor worked out an odd device designed to draw fresh air into gasproof shelters on or under the ground. Resembling a giant accordion, a special hand-operated bellows sucks fresh air into the shelter through a flue pipe that extends up forty feet above the ground. Said to be foolproof, the apparatus draws in air at the rate of 400 -cubic feet a minute.