MSA All-Service Mask: A Breath of Fresh Air

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Patented in 1921 and manufactured by the Mine Safety Appliances Company of Pittsburgh, the All-Service Gas Mask Type N was a “universal type” air-purifying mask intended for use by Miners, Firefighters, and other personnel working in contaminated environments. It was capable of filtering out a wide variety of atmospheric contaminants, including Carbon Monoxide, Hydrogen Sulphide, Ammonia, organic vapours, and smoke.

Thank you to Julian Horn for his invaluable assistance with creating this video.

0:00 Introduction
0:54 A Brief History of MSA Safety
3:00 Storage Box and Contaminant Ratings
6:09 Mask Features
7:25 Mask Timer / Breath Counter
8:33 Filter Canister Composition and Chemistry
13:15 Outro

SOURCES:
https://patents.google.com/patent/US1474205A/en
https://patents.google.com/patent/US3245917A/en?q=(MSA+Safety+Inc)&oq=MSA+Safety+Inc&sort=old&page=8
https://patents.google.com/patent/US2312227A/en?q=(MSA+Safety+Inc)&oq=MSA+Safety+Inc&sort=old&page=1
https://patents.google.com/patent/US2569895A/en?q=(MSA+Safety+Inc)&oq=MSA+Safety+Inc&sort=old
https://patents.google.com/patent/US2174349A/en?q=(MSA+Safety+Inc)&oq=MSA+Safety+Inc&sort=old
http://mygasmaskcollection.blogspot.com/2008/06/gas-mask-collection.html
https://woodsononline.wordpress.com/2015/03/05/tech-thursday-msa-gas-mask/
https://us.msasafety.com/ourHistory;jsessionid=E5558D1A88FD2208667F687F52CF5D61.worker1
https://www.explainthatstuff.com/carbonmonoxidedetectors.html
http://www.therebreathersite.nl/Zuurstofrebreathers/USA/msa_chemox.htm
https://patents.google.com/patent/US1787875A/en?inventor=perrott&oq=perrott&sort=new&page=18
https://patents.google.com/patent/US1586327A/en
https://patents.google.com/patent/US1559980A/en?q=(Perrott)&inventor=George+St+J&oq=George+St+J+Perrott
https://media.msanet.com/na/usa/apr/gasmasks/supersizeindustrialsizegasmasks/0515-03-gasmasks.pdf
https://www.osti.gov/servlets/purl/7314909
https://babel.hathitrust.org/cgi/pt?id=uc1.31210023589151&seq=29

Видео MSA All-Service Mask: A Breath of Fresh Air канала Our Own Devices