Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Publication of BE413517ApublicationCriticalpatent/BE413517A/fr
A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
A62B18/088—Devices for indicating filter saturation
Landscapes
Health & Medical Sciences
(AREA)
Pulmonology
(AREA)
General Health & Medical Sciences
(AREA)
Business, Economics & Management
(AREA)
Emergency Management
(AREA)
Filtering Of Dispersed Particles In Gases
(AREA)
Description
<EMI ID=1.1>
<EMI ID=2.1>
<EMI ID=3.1>
dit' que ledit air peut avoir abandonné en passant dans le filtre. Ledit procédé consiste en se que 1�on oblige l'air
<EMI ID=4.1> <EMI ID=5.1>
l'action d'un ressort au d'un autre moyen équivalent, on déter
<EMI ID=6.1>
Perfectionnements apportés aux moyens pour obtenir des organes métalliques creux ou en relief pour le moulage (notamment des matières plastiques), voire pour l'estampage ou l'emboutissage