File:Factory and industrial management (1891) (14594457548).jpg

Identifier: factoryindustria35newy (find matches)
Title: Factory and industrial management
Year: 1891 (1890s)
Authors:
Subjects: Engineering Factory management Industrial efficiency
Publisher: New York (etc.) McGraw-Hill (etc.)
Contributing Library: Engineering - University of Toronto
Digitizing Sponsor: University of Toronto

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ers head from blows or fallsof hard substances. The respirable air contained within the helmetis isolated from the external atmosphere by means of a pneumatictube which can be inflated at will and which, adjusting itself to everycontour of the face, assures most absolute safety so far as air-tight-ness is concerned, while it avoids all harshness of contact. The discharge valve for the exhaled air is proof against any de-rangement. It consists of a simple membrane with large surface.The chest of the wearer is entirely free for carrying anotherperson or any large burden. The wearer may stoop without fear incrawling through small openings. M. Le Breton, in a report pre-sented to the Coal-Gas Commission, concludes as follows: The construction of the Vanginot apparatus is very simple, andto put it into service requires the easiest of manipulations—the open-ing of an easily-controlled stop cock. In practical work the operator places the air accumulators on his i6 THE ENGINEERING MAGAZINE.
Text Appearing After Image:
FIG. 13. RENEWAL OF AIR-ACCUMULATOR BATTERIES (N THL VANGINOT APPARATUS. back like a knapsack, puts on the helmet, at: ches this to the air bat-tery, and opens the stop cock. Thus supplyi.ig himself with air, hemay enter a deleterious atmosphere. A special arrangement permitsthe wearer of the apparatus to traverse any ntressary distance beforeentering the irrespirable atmosphere without using the air supplystored in the battery. To accomplish this he raises a catch, openinga door in the helmet and putting himself in direct communicationwith the ordinary air, at the same time cutting off the flow from thestorage supply. As he approaclies the irrespirable zone he lowers RESCUE APPLIANCES IN FRENCH MINES. 17 the catch, closing the door, and immediately finds himself suppliedwith air from the battery. Assurance of the proper working of any automatic respiratoryapparatus before it is carried into actual service depends upon thereliability of its mechanical parts. In the case of the Vangino

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