Re: [PSUBS-MAILIST] Piston pressure regulator

[Marie-Andrée et Pierre <poulin.carrier@videotron.ca>]

Hi Silky,

I like your idea.

As for (3) emergency use, I assume that one side of the piston (the side 
with the spring) must be at 1atm of else you would only mesure pressure 
difference...

I have another idea. If instead of using spring you use compressed air on 
one side of the cylinder. So you want max deep of 100 foot (50 psi). you 
slowly open a valve from air tank and adjust pressure inside cylinder to 50 
psi with a gage. That way, it could be easy to adjust and also be variable 
adjustement for any situation.

We could also used electricity for valves because lots of pneumatic cylinder 
already commes with limit switches mounted on the core of the cylinder. Off 
the shelf and ready to use.

My 2 cents to your idea...

Pierre Poulin

----- Original Message ----- 
From: "s ï l k y N?³" <silkyfx@hotmail.de>
To: <personal_submersibles@psubs.org>
Sent: Friday, June 10, 2005 4:39 AM
Subject: [PSUBS-MAILIST] Piston pressure regulator


> Hey,
>
> I have posted a picture on moki. It shows the basic principle of a methord 
> that could be used to regulate (three things) (1) the air pressure 
> difference between water and in hull. (2) Vent air out of an ambieus sub. 
> (3) automaticaly bring the sub back to the surface if it goes under a 
> preset depth (too near crush depth or Air related depths)
>
> (example) the idea is 1 lubricated water proof piston with two open sides. 
> one open side exposed to the outer water pressure and the other to the 
> inside pressure. The displacement from its central position due to presure 
> difference is used to open - close two valves. one valve leads to the 
> breathing air suply the other (2) IS the air out vent.(link to image at 
> bottom)
>
> Adjustable spring(s) could be used to controle the sensetivity of this 
> system. This could if implimented correctly be used to reduce the 
> probability of the piston bouncing up and down effect and reduce the 
> amount of air wasted due to small vertical movements.
>
> How to use this as an emergency system (3) one could for example use a 
> stiffer spring to encrease the pressure needed to activate a valve and 
> increase the distance the piston must move before the valve is activated. 
> In this case the activated valve would be a secondairy blow ballast valve.
>
> I have scribles, notes & workings If you want more info.
>
> thnx silky
>
> _________________________________________________________________
> Nicht lange suchen - finden! MSN Suche. http://search.msn.de/ Jetzt 
> testen!
>
>
>
>
> ************************************************************************
> ************************************************************************
> ************************************************************************
> The personal submersibles mailing list complies with the US Federal
> CAN-SPAM Act of 2003.  Your email address appears in our database
> because either you, or someone you know, requested you receive messages
> from our organization.
>
> If you want to be removed from this mailing list simply click on the
> link below or send a blank email message to:
> removeme-personal_submersibles@psubs.org
>
> Removal of your email address from this mailing list occurs by an
> automated process and should be complete within five minutes of
> our server receiving your request.
>
> PSUBS.ORG
> PO Box 311
> Weare, NH  03281
> 603-529-1100
> ************************************************************************
> ************************************************************************
> ************************************************************************




************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
	removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 311
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************