Oxygen mask info needed
Posted 31 December 2018 - 10:55 AM
Can anyone share some info with me, is this a rare model? What model/style flight helmet is it best displayed with?
Posted 31 December 2018 - 11:26 AM
mine not a great competence about this. Anyway an early 'C' model by the MSA (Mine Safety and Appliances) maker, an unique pattern to the USN. It worked out of a very different oxy. system concept - the complicated re-breather system - than the later demand-type masks like the 'D' type (again by MSA) and A-14 (by Ohio Chemical Co.). Mask itself was left inside the cockpit and not carried by its wearer.
Rather similar in appearance to the mentioned D pattern still by MSA, however this latter could be carried on the person outside the cockpit (although still more cumbersome than the A-14, and inferior to it).
Mostly used by Helldiver and Dauntless crews until (I believe) about springtime 1943, and best displayed together a classic M-450 style helmet.
Edited by BlueBookGuy, 31 December 2018 - 11:36 AM.
Posted 31 December 2018 - 12:00 PM
Your Navy contract MSA (Mine Safety Appliance Co.) "type C" mask is early, but not rare. Quite a large number made it to the post-war surplus market. Unlike later designs used by the Navy in WW2, it was not issued as personal equipment, but was considered part of the equipment to be carried in the plane. The long rubber hose was attached to a re-breather unit that was installed at the pilot and crew stations in the aircraft and was fed from the central oxygen supply. The wearer's exhaled air was sent through a chemical filter and mixed with the pure oxygen, extending the possible duration of high altitude flight beyond the capacity of what was carried in the oxygen tanks alone.
Seen below, the mask and spare filter cannisters for the re-breather unit can be seen in the radioman's compartment on a TBF-1 Avenger torpedo bomber. The top of the unit, and its carrying handle, is at the bottom of the photo:
Posted 31 December 2018 - 12:08 PM
Edited by 1canpara, 31 December 2018 - 12:08 PM.
Posted 31 December 2018 - 12:11 PM
Seen below, the "type C" mask is on the top right. On the top left is its successor, the MSA "type D" mask (mentioned by Franco), which was part of a demand oxygen system that used a more conventional regulator and WAS issued as personal equipment. Unfortunately, very few examples have survived.
Posted 31 December 2018 - 12:25 PM
Posted 31 December 2018 - 12:28 PM
As usual, a greatly exhaustive post by Paul and photos of his items in quite impressive condition/quality. Thanx very much.
btw. here it's 9.28 PM so I exploit now, to wish all the Forum a great merry 2019. Time to go (at least) for a very small party here within family and relatives, 6-7 people and nothing more.... "CIAO A TUTTI !!!"
Posted 01 January 2019 - 11:30 AM
The "C" mask (on the left), and the "D" mask ( on the right) for direct comparison, as worn in an altitude chamber during flight training. Note the instructor, inside the chamber with the students in the first photo, wears a nasal A-7A mask so the students can hear his instructions clearly. The "D" mask's hose is connected to its regulator (rectangular black box) and spare filter cannisters for the "C" mask apparatus are seen stored on a shelf below it. A second instructor, outside the chamber, controls the pressure and monitors the occupants wellbeing.
Posted 01 January 2019 - 11:46 AM
Posted 01 January 2019 - 01:20 PM
Posted 02 January 2019 - 07:38 AM
Posted 03 January 2019 - 07:36 AM
Posted 03 January 2019 - 12:13 PM
Thanks Paul and Dustin for this great photos. Mostly are from training. Maybe some one have a combat photo with Type C mask? Im sure about one from National Archives but any more?
Posted 03 January 2019 - 01:32 PM
Jerry, as Paul mentioned since it was part of the aircraft I think it is tough to find images of it in the combat theater but am sure there are a few here and there. Additionally, I think it was phased from servcie pretty quick due to new wartime requirements opting for the regulated demand systems which certainly there was phasing out time period but happened quite rapidly.
We see the use of the new Type-D systems in use by at least as early as June 1943 in the forward areas like in this image here. With the masks now issued as personal equipment we can see masks being carried by may individuals.
Posted 03 January 2019 - 01:38 PM
On a pictorial stand point, I have observed the use of the AAF Type A-10 and other nasal type demand systems used by aviation avtiivies in these early days progressing past the re-breather Type-C. The Type-D can be seen in actually quite a few images whihc ofetn may be mistaken for the Type A-14, It seems it reached its peak use through 1943. Starting in early 1944, the Type A-14 had started to really become the new standard whihc images of it in use are a dime-a-dozen.
Here are a few addtional images from 1943 illustrating the Type-D mask. Again, we see its use because it now being part of the indivudual equipment assembly. I would surmise that the Type-C mask was all but delegated to training purposes only very early in the war and/or second echelon aviation activities being that those forward area operating units having priority for the demand systems first.
Posted 04 January 2019 - 07:04 AM
Sure Dustin. I know about that. Today I will try to scan this photo about I mentioned with type C mask. For sure somewhere should be more in the sames style...
btw. killer photos with type D mask. I know some of it but not all! p.s it worth to mentioned also at they used a RS-83 mic added to the mask + RS-76 throat mic.
Edited by jerry_k, 04 January 2019 - 07:08 AM.
Posted 05 January 2019 - 01:27 AM
Sorry guys for confusion. I was thinking about one photo from Warner book. I have't looked into this book for a long long time.
I guess it is a reconstruction photo made by Scot Steele than photo from National Archives (what I did think from my memory firstly).
Posted 05 January 2019 - 11:05 AM
I'm still hunting but came across these interesting representations of alternate sources with the use of the AAF Type A-10 or A-10A oxygen masks used by some marine aviation units. For those of you that want to have alternate choices, this mask is a legitimate alternate.
** oops! correction, the three pilots below are actually AAF P-38 pilots of the 5th AF. They were intermixed with marine images and assumed before I read the credits on the back. The top image is of a USMC VMB squadron though.
Edited by dustin, 05 January 2019 - 11:12 AM.
Posted 05 January 2019 - 11:30 AM
Just to add to Dustin's last post, we do have images of the A-9 and A-10R in limited use by Navy and Marine fliers while the transition from the MSA to A-14 masks was taking place, but none of the A-10A by those two services. For that matter, photos of the A-10A in use by USAAF personnel are extremely rare.
I did find the two images below, which I had forgotten about, from Naval Aviation News that shows the MSA rebreather unit with "C" mask installed in the cockpit of a TBF-1 torpedo bomber:
Posted 05 January 2019 - 11:48 AM
Thanks for the clarification on the correct designations of the masks Paul. Memory isn't always the best.
This mask is an A-10 (revised) ?
Navy photographic squadron
Posted 05 January 2019 - 11:57 AM
Sorry for being off topic from the original post but it is just a curious subject to explore in regards to US Navy oxygen systems they used.
So in post #21, those USMC crew members are actually using the A-9 then?
Edited by dustin, 05 January 2019 - 11:59 AM.
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