Factory and industrial management . passes to thereservoir bag. 2.—A regenerator fixed on the case, which serves also for theprotection of the gas bag. This case or box is of metal, divided bypartitions into four compartments designed for reception of thepotash solution, and communicating by an orifice and two tubes. The IJ Hill liMjlMlERlNG lie iL;lit (A tlusc tubes and llicir llani^cs prevents the solution of potashfrom being thrown from one compartment to another. The largecapacity of the lowest C()mi)artment makes any splashing- of the solu-tion finally harmless, and the wearer
Factory and industrial management . passes to thereservoir bag. 2.—A regenerator fixed on the case, which serves also for theprotection of the gas bag. This case or box is of metal, divided bypartitions into four compartments designed for reception of thepotash solution, and communicating by an orifice and two tubes. The IJ Hill liMjlMlERlNG lie iL;lit (A tlusc tubes and llicir llani^cs prevents the solution of potashfrom being thrown from one compartment to another. The largecapacity of the lowest C()mi)artment makes any splashing- of the solu-tion finally harmless, and the wearer of the apparatus may lie downor crawl in any position without any possibility of the potash passingfrom one compartment to another. A special arrangement of thepartitions of the lower part of each compartment prevents the reduc-tion of the absorbing surface when the wearer is stooped over. 3.—A reservoir sack for the air, made of very pliable impermeablefabric, in which the regenerated products of respiration are FIG. 8. TISSOT RESPIRATORY APPARATUS ; SHOWING HOW THE RESCUER MAY CRAWLFLAT ON HIS STOMACH WITHOUT INCONVENIENCE. 4.—An automatic safety or escape valve of the slide type, operatedby the walls of this air reservoir. When the pressure in this latterreaches from 2 to 5 millimetres of water the sack bears against a plate,pushing it backward and by means of a rod draws aside a disc, un-covering the orifice of the tube and allowing part of the gas to escapefrom the apparatus. When the pressure has diminished sufficientlythe disc returns to the closing position and the plate is restored to itsformer place by the action of a spring. The very large surface pre-sented by the sack (800 centimetres) permits a considerable force tobe exercised for the operation of the valve, making its action certain,even at a pressure so low as to be imperceptible to the wearer. RESCUE APPLIANCES IN FRENCH MINES. 13 5.—A receiver for compressed oxygen, provided with a redu
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
