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Maybe
one could take a ball valve apart and use those seals, or at least see what they
do and somehow copy it. I'm getting interested in trying to make one of
those things. Watching that video and the action of that arm was very
interesting, that arm and claw were really simple and it seemed to be very
articulate. It seemed to work with ease. I initially missed that
video also, in the messages, and had to go back and find the thread where it
came from, glad I found it ! I guess the containment socket assembly
that houses the swivelling ball would most likely be split in half and bolt
together from the outside. I have a old German machinist friend who one
time was telling me about the machining process for machining a sphere on a
lathe, I never imagined I would ever have a need to repeat the
process!
Brian,
Not
sure the seating method, a partial seating surface of nylon with silicon
grease may be one way. O-ring would be another but not sure this would
be great with type of dynamic surface.
R/Jay
Respectfully,
Jay
K. Jeffries
Andros
Is., Bahamas
Talk
sense to a fool and he calls you foolish.
- Euripides (484 BC - 406 BC)
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brian
Cox
Sent: Thursday, August 21, 2008 1:02 AM
To:
personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Re: The
Dry Divers
Do you know how they made the seal on that cue ball? You're right about
machining stainless, but not impossible.
-----Original
Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Jay K.
Jeffries
Sent: Tuesday, August 19, 2008 4:55 PM
To:
personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Re:
The Dry Divers
The
cue ball was handy and readily adoptable for the first manipulator.
Cue balls were originally made from ivory, then nitro cellulose (the first
plastic but a touchy explosive they found out), and then plastic. A
ball valve will have a limited range of motion due to its standoff from the
hull and will be difficult to work with due to the large diameter hole
through the middle. Stainless steel would be great for the ball but
may be difficult to machine for the home machinist.
R/Jay
Respectfully,
Jay
K. Jeffries
Andros
Is., Bahamas
Talk
sense to a fool and he calls you foolish.
- Euripides (484 BC - 406 BC)
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brian
Cox
Sent: Tuesday, August 19, 2008 7:34 PM
To:
personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Re:
The Dry Divers
I
want one too ! I don't get the cue ball part,
wouldn't you have to have a hole thru the cue ball? What are cue
balls made of ? ceramic? What about using a ball valve or simply
machine a large stainless sphere and put a hole thru
it.
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