Re: [PSUBS-MAILIST] Perry lockout

Vance,

I should of said rack and pinion gear type, with the racking gear really being a small section of a spur gear and being attached to the outer rotating locking ring with a plurality of locking dogs on it. The pinion gear is attached to a locking bar that can lock and seal the hatch from either side of the hatch. This type of hatch I've seen in the movie K-19 and on a Russian submarine museum in Seattle that is now gone. When I was in the said museum I didn't have a camera with me and I didn't know what all exactly I was looking at. Here is a couple pics I found of the same sub but without close up detail.

http://www.frappr.com/?a=viewphoto&id=2384531&pid=3812795&myphotos=1

http://www.frappr.com/?a=viewphoto&id=2384531&pid=3812781

I was thinking that if this type of hatch was used as the interior hatch between a diver lockout chamber and other areas of a sub and swinging into the diver lockout chamber, you wouldn't need a double hatch set up or the need to keep the diver lockout chamber slightly pressurized to seat the inner hatch seal, since the locking ring will tighten the seal for you.

When I was speaking of a double O-ring seal, I was thinking of a basic hatch type like most PSUBers use but with a wider flange on both the hatch and the other mating flange. Then having another O-ring and groove to receive it in the hatch flange. The configuration I'm thinking of wouldn't be to much heaver then the basic one O-ring type. I'm not familiar with the double acting hatches and so I'll have to research that.

Brent

From: vbra676539@aol.com
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Perry lockout
Date: Fri, 26 Jan 2007 07:14:20 -0500

Brent,

Russian type pinion gear locking ring? All the Perry boats had dual hatches with two pivoting dogs (tapered). 1 atmosphere diving: inner hatch open, outer closed. After blowdown, chamber slightly overpressurized to set the inner hatch seal and verified constant prior to leaving the bottom, outer hatch left open.

If you are talking about double acting hatches, they are monstrously heavy, relative to a double seat and two hatches. There was never any question about using one. If you're weight is getting out of hand, use AlMag or aluminum, maybe.

Vance

-----Original Message-----
From: brenthartwig@hotmail.com
To: personal_submersibles@psubs.org
Sent: Fri, 26 Jan 2007 12:31 AM
Subject: RE: [PSUBS-MAILIST] Perry lockout

Vance

On the PC-1202 did they use a Russian type pinion gear locking ring on the outer hatch? I've been looking for mechanical drawings for this type of locking ring as well as others. I've been trying to find out if the locking dogs are compound tappered on the inside mating surfaces like a screw thread at a slite tapper or if they are just flat with a rounded over or chamfered leading edge where the surfaces begin to mate? Have you ever seen a double O-ring hatch seal to back up the first O-ring? Do you have any pictures of the diver lock out chamber? Your a dry diving maniac Vance and some day I hope to be be one as well.

Brent H

From: vbra676539@aol.com
Reply-To: personal_submersibles@psubs.org
To: pdcgrant@mweb.co.za
CC: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Perry lockout
Date: Thu, 25 Jan 2007 17:29:07 -0500

PC-1201 was is an observation version of the 12 series, the first, as you might guess. The mighty PC-1202 was the one and only 12-class lockout version. 1201 is in Palm Beach undergoing a complete retro-fit, or was the last time I heard about it. PC-1202 is down your way, in Singapore, at last reading--refurbished, but laid up and for sale. Most of my work in Europe and Africa was aboard one or the other of the 12-boats (Intersub owned all of them except 1203, which belonged to Comex at the time). I liked them a lot, in case you were wondering. 3000# of batteries in a 16,000# vehicle gave us a hell of a work capacity--eight hour dives were the norm. Preventative Maintenance routines kept the boats shipshape, and we ran them hard and long. I was just telling the Marine Vehicles manager at Harbor Branch (who has 1204 in cold storage) that I made over 300 dives in that boat, and he tells me that they haven't done that many in ten years!!! I did mine in a season and a half.! ! !

Vance

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