Bob there is also the "elevator spring"  they double as flower pot holders 

set 2 elevator stop springs in 4 inches of concrete along the driveway ---
paint them white --- then you mix the tanks -- set the tans on these they
will slide right in -- then just have you kid walk by them and push the
tanks evey 5 minutes for an hour -- they will wobble like a weeble, but
will not fall down ...... then buy the kids some ice cream .....

after the tanks have been weebled and wobbled --- they will be mixed .......

Mix it up a bit ......

joel
 


At 10:21 AM 4/10/1999 -0400, Bob Sherwood wrote:
>You stop being so cheap, pony-up and buy a Super-deluxe-doubles-tank shaking
>device. Well worth the investment as it also doubles as a storage place for
>your tanks. (Holds four sets) and a fun mini-marry-go-round ride for the
>kids when not being used for mixing.  FWIW- it's a lot easier to sell the
>wife on it if you tell her it is for the kids, and you will only use it
>after they're done. :-)
>-----Original Message-----
>From: Jim Cobb <cobber@ci*.co*>
>To: Jeff Waugh <jrwaugh@ix*.ne*.co*>
>Cc: Steve Hogan <Steve.Hogan@tr*.co*>; pdisler@io*.ne*
><pdisler@io*.ne*>; silent@cu*.ne* <silent@cu*.ne*>; Tech Diver
><techdiver@aquanaut.com>
>Date: Saturday, April 10, 1999 9:56 AM
>Subject: Re: Trimix Question
>
>
>>So, how do you roll a set of doubles?
>>
>>   Jim
>>
>>Sender: Jeff Waugh  Date: 4/8/99 11:13 PM
>>
>>>     I'm not sure about the temperature actually being that much of an
>>>influence
>>>on the ending reading. I have found that generally low O2 % mixes such as
>>>"deep"
>>>Tri-Mix'es generally homogenize to the final desired analysis over a
>>>period of a
>>>few hours.
>>>     I've found that high O2 mixes that if filled with O2 and topped with
>>>air and
>>>allowed to sit without agitation, can render an inaccurate analysis a day
>>>later.
>>>At that point, a simple "roll" around the garage will suffice to get you
>>>what you
>>>were looking for!
>>>
>>>Jim Cobb wrote:
>>>
>>>> I don't know about you guys but I think the problem we are dealing with
>>>> here is the temperature of the mix rather than stratification. As the
>mix
>>>> cools off the reading becomes more accurate.
>>>>
>>>>    Jim
>>>>
>>>> Sender: Steve Hogan  Date: 4/8/99 6:53 PM
>>>>
>>>> >
>>>> >I have run into this and have modified my mixing procedures
>>>> >so that after I add the O2 to the helium I wait 1 day (I
>>>> >usually mix at night so waiting around is not appealing)
>>>> >before measuring the O2 % (O2 & He). It is not hard to figure
>>>> >out what percentage I expect after mixing O2 with He.
>>>> >Next step is to add air, wait a few hours (usually doing
>>>> >something else) and then measure again.
>>>> >I fill about 50 psi/min so I expect to not get much mixing from
>>>> >Brownian motion.
>>>> >
>>>> >Steve
>>>> >
>>>> >-----Original Message-----
>>>> >From: Patricia Disler [mailto:pdisler@io*.ne*]
>>>> >Sent: Friday, April 09, 1999 1:14 PM
>>>> >To: S I L E N T I M M E R S I O N
>>>> >Cc: techdiver@aquanaut.com
>>>> >Subject: Re: Trimix Question
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >At 09:16 AM 4/8/99 -0700, you wrote:
>>>> >>Frank,
>>>> >>
>>>> >>>Not me, but I do let the filled tanks rest a day before analyzing. An
>if
>>>> >>>you want to tell me
>>>> >>>thats not neseccary I recommend that you try this: Fill oxygen, top
>with
>>>> >>>air, wait a minute,
>>>> >>>analyze mix, turn the tank so that the valve faces ground, wait
>another
>>>> >>>minute and than
>>>> >>>re-analyze the mix.
>>>> >>
>>>> >>And it's the same... or not?
>>>> >>When filling a tank the temperature and pressure are high which in
>turn
>>>> >>gives a high diffusion coefficient. Makes the mix homogeneous almost
>>>> >>instantaneoulsy (couple of seconds).
>>>> >>What kind of differences do you get?
>>>> >>What kind of analyser do you use, are you sure the hoses are drained
>when
>>>> >>using a regulator or something?
>>>> >>
>>>> >>Regards,>
>>>> >>THOMAS
>>>> >
>>>> >I have witnessed Nitrox mixtures take a while to fully homogenize.
>Several
>>>> >years ago while mixing 80/20, (Yeah I know don't start) it came out 63%
>O2
>>>> >approx 30 min after the very s-l-o-w top off to fill pressure. Yes I
>>>> >checked the calibration of the aynalizer (Teledyne TD-50). Each time I
>>>> >would check the O2 reading would climb. I did this over a period of
>several
>>>> >hours. Later it was right on 80%.
>>>> >I'd have to say stratification can and does occur, esp. if there is not
>>>> >enough turbulence during top off.
>>>> >I have never seen this with Trimix as the fill rates are much higher.
>>>> >However I suppose it could occur if they too were topped slowly.
>>>> >At any rate I never seem to dive my gas until they show the correct
>>mixture.
>>>> >
>>>> >
>>>> >
>>>> >"SILT HAPPENS"JD   JEFF DISLER
>>>> >  SAFE CAVING       NSS 26000
>>>> >--
>>>> >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
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>`techdiver-request@aquanaut.com'.
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>`techdiver-request@aquanaut.com'.
>>>> >
>>>>
>>>>  -------------------------------------------------------------------
>>>>  Learn About Trimix at http://www.cisatlantic.com/trimix/trimix.html
>>>>
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>>>
>>>
>>>
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>>>
>>
>>
>> -------------------------------------------------------------------
>> Learn About Trimix at http://www.cisatlantic.com/trimix/trimix.html
>>
>>
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