File:Factory and industrial management (1891) (14594355960).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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s invented anapparatus of which the earlier forms appeared in 1903 and the mostrecent in 1907. During these four years this respirator has proved:tself in many places, even as far as in Russia and Mexico. There are now two types of rescue apparatus in use in F-enchmines: I.—Portable appliances which permit the bearers to move at willthrough the mine galleries and upon which we shall dwell particularly. 2.—Apparatus with pumps and piping, having a much more lim-ited range of action, which are adapted for the prosecution of workrather than for rescue. The portable appliances in their turn may be divided into twoclasses: First, regenerative apparatus, and second, apparatus usingordinary air; these latter, although they give a more limited workingperiod than the former, appear to demand less nicety of manipulation.Furthermore, air exists everywhere, while at the moment of a disasteroxygen, potash, and other chemical necessaries may be lacking. In the RESCUE APPLIANCES IN FRENCH MINES.
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FIG. I. THE DRAEGER-GUGLIELMINETTI RESPIRATOR^ SEEN FROM BEHIND.Showing the oxygen reservoir, the pressure-reducer and the regenerator for exhaled gases. former class (much more largely employed in Germany and Austriathan in France) we may note particularly the ancient pneumatophores(Walcher, Mayer-Pilar, and Giersberg types) which generally con-sist of oxygen tanks delivering (usually without any regulator) intoan air-tight bag, from which the man inhales and into which he ex-hales. An absorbent, usually liquid, contained in this reservoir, puri-fies this air by the removal of the carbonic acid. They did not workvery well, and they have been abandoned, as has also the Shamrock 6 TUL ENGINEERING MAGAZINE. —an apparatus with a nKnith-piccc and a i)iiice-nez, having a pressurerccrnlator, a soWd ahsorhent inclosed in a cage within the air-tightsack, in whicii, also, circulation was mechanically maintained. The Draeger-Guglielminetti respirator merits larger notice, butIts mechanism is

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