DivAir #10

[spirou]

Hello

DivAir is arrived 🙈🎉🎉🎉 Few check and control and than, go dive.


IMG_20231020_182807_335 by Patrick Michel, sur Flickr

Fred

[spirou]

Another things, checked other threads about the DivAir, and read "basic scuba"

IMG_20231020_184049_917 by Patrick Michel, sur Flickr

[vance]

Congratulations on receiving the DivAir safe and sound! We're waiting for a dive report.

When you take the cover and diaphragm off to look at the insides, be very careful of the diaphragm. The retaining band can cut the silicone very easily. I put the band on the diaphragm first, then slip it over the rim.

I ruined one new diaphragm by putting the diaphragm on first, then trying to get the band over it. The sharp-ish edge of the band cut it like butter.

[spirou]

Hello Phil,

This time the USPS  box was in perfect state 😃.

Thanks for the advise. I already remove the cover. But I don't go further, I just look, the diaphragm is very soft and thin, ( I immediately thought, " Fred if you remove the diaphragm, be very careful with it and with the band🥵). I can't use my single tank spiro due to the plate for shoulder strap, but I think the twin tank is ok, and normally it must be possible to hook a second reg in back up.

Cheer's

Fred

[nikeajax]

Fred, I'm thinking you may want to use some electrical tape:

en.wikipedia.org/wiki/Electrical_tape

on the inside of the retaining-band, but with 1-2mm sticking out/protruding on either side/edge: this will give you a soft-buffer This should lessen the need for overly colorful language

Good luck and congratulations

Jaybird

[james1979]

Oct 20, 2023 9:47:13 GMT -8 vance said:

Congratulations on receiving the DivAir safe and sound! We're waiting for a dive report.

When you take the cover and diaphragm off to look at the insides, be very careful of the diaphragm. The retaining band can cut the silicone very easily. I put the band on the diaphragm first, then slip it over the rim.

I ruined one new diaphragm by putting the diaphragm on first, then trying to get the band over it. The sharp-ish edge of the band cut it like butter.

I'll pull mine apart soon and see if a something like the SCUBA exhaust diaphragm retainer is in order (soft printed buffer between the diaphragm and the retaining clamp).

[vance]

I don't think anything is necessary but care. If you slip it on band and all, it'll go on fine, w/o worry.

[vance]

Oct 20, 2023 11:05:21 GMT -8 spirou said:

Hello Phil,

This time the USPS  box was in perfect state 😃.

Thanks for the advise. I already remove the cover. But I don't go further, I just look, the diaphragm is very soft and thin, ( I immediately thought, " Fred if you remove the diaphragm, be very careful with it and with the band🥵). I can't use my single tank spiro due to the plate for shoulder strap, but I think the twin tank is ok, and normally it must be possible to hook a second reg in back up.

Cheer's

Fred

There are plastic tubes over the long cover screws to keep the diaphragm from being abraded by the threads.

I don't remember if your Divair has new cover screws, but in either case, either new or original, I put new tubing on each one. The originally clear and supple oem tubing is usually hard and black after 70 years. This is the same tubing that I use to restore capillary depth gauges.

Don't lose the acorn nuts! They are hideously expensive to replace.

[vance]

I wonder how many members have DivAirs?

I know JB, James, SwimJim, Fred, Neil, Graeme (?), and I all have at least one. I'm sure there are others.

Anyone else I forgot?

[antique diver]

Oct 20, 2023 15:50:59 GMT -8 vance said:

I wonder how many members have DivAirs?

I know JB, James, SwimJim, Fred, Neil, Graeme (?), and I all have at least one. I'm sure there are others.

Anyone else I forgot?

Aluminum version here.

[spirou]

5.30 am wake up, I go down to the cellar, and I try to hook the DivAir on my twin, 🤬 his reserve mechanism is on the way when I try on the center valve ( there is my the right shoulder assembly on the tank)🤬.Finally I hook on the second valve (right side), tanks are 500psi, and... ,... it leaks slowly. I must open and look inside...to be continue😃.

But I must go dive first, I must find a reg.

Cheer's

Fred

[vance]

The HP seat is a used one that I had which replaced an incorrect Scuba seat that it came with. The seat has not been pressurized more than a few times.

Hook up to a full 2250 tank and cycle it a few times before you take it apart. If it still leaks, I'll bet it just needs the lever dropped a fraction.

[spirou]

Screenshot_2023-10-21-06-36-31-932 by Patrick Michel, sur Flickr

[SeaRat]

Oct 20, 2023 20:40:57 GMT -8 spirou said:

Screenshot_2023-10-21-06-36-31-932 by Patrick Michel, sur Flickr

Spirou,

Thank you for the patent number. I usually enjoy going through patents, but this one is most unusual. The first claim is almost undecipherable. Here it is, in one sentence (JB, ‘don’t think you’ll want to even look at this sentence);

… 1. In a breather regulator comprising a chamber, movable means in said chamber exposed to the surrounding fluid media through said chamber and movable in response to the pressure of said surrounding fluid media, motion transmitting means actuated by said movable means, means defining an inlet path for admitting air under pressure into said chamber, said inlet path including an air flow opening, and a valve member in said air flow opening and operating to adjust the effective extent of opening thereof so as to control. the flow of air therethrough, said motion transmitting means acting upon said valve member in response to said movable means so as to admit air under pressure into said chamber, and to restore said movable means to a normal, valve closing position against the action of said surrounding fluid media, means defining an outlet path in communication with said chamber whereby said air under pressure may be inhaled by a user and correspondingly withdrawn from restoring action on said movable means whereby said valve member opens in response to the pressure of said surrounding fluid media, limiting means for limiting the effective extent of opening of said air flow opening so as to limit the flow of air upon which said valve member can act in response to said motion transmitting means, and externally accessible means to control said limiting means for rendering said limiting means at least partially ineffective so as to produce a larger effective extent of opening of said air flow opening, said motion transmitting means being a lever structure, said limiting means comprising a member bearing against said lever structure and preventing full lever action thereof, said last-named member including a spring member normally urging said limiting means to a non-limiting position, and said control means inhibiting action of said spring member…

Again, the above is one sentence. It is 302 words long! It uses “movable means” to describe, I think, the diaphragm and levers. Amazing…

That sentence was outdone by claim #10, with one sentence consisting of 355 words:

… 10. In a breathing regulator comprising a body, a chamber in said body, a diaphragm in said chamber, said diaphragm being flexible, a cap for said body having openings formed therethrough so as to expose the diaphragm to the surrounding fluid media through said chamber whereby said diaphragm may be deflected by the pressure of surrounding fluid media, lever means actuated by said diaphragm deflection, an inlet member aver ps for admitting air under pressure therethrough and into said chamber, said inlet member having an air flow opening and a valve member in said air flow opening and operating to adjust the effective extent of opening thereof so as to affect the flow of air therethrough, said lever means acting against said valve member in response to diaphragm deflection so as to admit air under pressure into said chamber, and to restore said diaphragm to a normal valve closing position against the action of said surrounding fluid media, means defining an outlet path in communication with said chamber whereby said air under pressure may be inhaled by a user, and correspondingly withdrawn from restoring action on said diaphragm whereby said valve member opens in response to the pressure of said surrounding fluid media, limiting means for initially limiting the effective extent of opening of said air flow opening so as to limit the flow of air upon which said valve member can act, externally accessible means to manually adjust said lirnitin' means to a fixed and predetermined relatively non-limiting position so as to produce a larger effective extent of opening of said air flow opening, an air exhaust chamber formed in said body, an exhaust valve in said exhaust chamber, said exhaust valve being vertically spaced from said diaphragm, an air exhaust path for said exhaust chamber comprising an air outlet in said exhaust chamber communicating With said cap openings, said exhaust chamher being otherwise totally enclosed against the discharge of exhaust air, said cap openings being at least at the vertical level of said diaphragm when the regulator is in a position where the diaphragm is at a higher vertical level than said exhaust valve…

patents.google.com/patent/US2787280A/en?oq=Arpin+US2787280

Again, one sentence. Maybe that’s why Healthways bought the DivAir, but then developed its own set of regulators, called the Healthways Scuba.

IMG_2916 by John Ratliff, on Flickr

John

[spirou]

Oct 20, 2023 20:35:42 GMT -8 vance said:

The HP seat is a used one that I had which replaced an incorrect Scuba seat that it came with. The seat has not been pressurized more than a few times.

Hook up to a full 2250 tank and cycle it a few times before you take it apart. If it still leaks, I'll bet it just needs the lever dropped a fraction.

Thanks a lot , this I will try, tomorrow I must inflate my twin tank.